build: Move cli tool sources to a separate subdirectory

This unclutters the top-level directory and groups related files together.

14 files changed, 14619 insertions, 0 deletions

diff --git a/avtools/Makefile b/avtools/Makefile
new file mode 100644
index 0000000000..d6d609f544
--- /dev/null
+++ b/avtools/Makefile
@@ -0,0 +1,52 @@
+AVPROGS-$(CONFIG_AVCONV)   += avconv
+AVPROGS-$(CONFIG_AVPLAY)   += avplay
+AVPROGS-$(CONFIG_AVPROBE)  += avprobe
+
+AVPROGS    := $(AVPROGS-yes:%=%$(EXESUF))
+PROGS      += $(AVPROGS)
+
+AVBASENAMES = avconv avplay avprobe
+ALLAVPROGS  = $(AVBASENAMES:%=%$(EXESUF))
+
+OBJS-avconv                   += avtools/avconv_opt.o avtools/avconv_filter.o
+OBJS-avconv-$(CONFIG_LIBMFX)  += avtools/avconv_qsv.o
+OBJS-avconv-$(CONFIG_VAAPI)   += avtools/avconv_vaapi.o
+OBJS-avconv-$(CONFIG_VDA)     += avtools/avconv_vda.o
+OBJS-avconv-$(HAVE_DXVA2_LIB) += avtools/avconv_dxva2.o
+OBJS-avconv-$(HAVE_VDPAU_X11) += avtools/avconv_vdpau.o
+
+define DOAVTOOL
+OBJS-$(1) += avtools/cmdutils.o avtools/$(1).o $(OBJS-$(1)-yes)
+$(1)$(EXESUF): $$(OBJS-$(1))
+$$(OBJS-$(1)): | avtools
+$$(OBJS-$(1)): CFLAGS  += $(CFLAGS-$(1))
+$(1)$(EXESUF): LDFLAGS += $(LDFLAGS-$(1))
+$(1)$(EXESUF): FF_EXTRALIBS += $(EXTRALIBS-$(1))
+-include $$(OBJS-$(1):.o=.d)
+endef
+
+$(foreach P,$(AVPROGS-yes),$(eval $(call DOAVTOOL,$(P))))
+
+all: $(AVPROGS)
+
+avtools/cmdutils.o: avversion.h | avtools
+OBJDIRS += avtools
+
+ifdef AVPROGS
+install: install-progs install-data
+endif
+
+install-progs-yes:
+install-progs-$(CONFIG_SHARED): install-libs
+
+install-progs: install-progs-yes $(AVPROGS)
+	$(Q)mkdir -p "$(BINDIR)"
+	$(INSTALL) -c -m 755 $(AVPROGS) "$(BINDIR)"
+
+uninstall: uninstall-progs
+
+uninstall-progs:
+	$(RM) $(addprefix "$(BINDIR)/", $(ALLAVPROGS))
+
+clean::
+	$(RM) $(ALLAVPROGS) $(CLEANSUFFIXES:%=avtools/%)
diff --git a/avtools/avconv.c b/avtools/avconv.c
new file mode 100644
index 0000000000..5c36761c1d
--- /dev/null
+++ b/avtools/avconv.c
@@ -0,0 +1,2913 @@
+/*
+ * avconv main
+ * Copyright (c) 2000-2011 The Libav developers
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include <ctype.h>
+#include <string.h>
+#include <math.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <signal.h>
+#include <limits.h>
+#include <stdint.h>
+
+#include "libavformat/avformat.h"
+#include "libavdevice/avdevice.h"
+#include "libswscale/swscale.h"
+#include "libavresample/avresample.h"
+#include "libavutil/opt.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/samplefmt.h"
+#include "libavutil/fifo.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/dict.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/avstring.h"
+#include "libavutil/libm.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/time.h"
+#include "libavformat/os_support.h"
+
+# include "libavfilter/avfilter.h"
+# include "libavfilter/buffersrc.h"
+# include "libavfilter/buffersink.h"
+
+#if HAVE_SYS_RESOURCE_H
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+#elif HAVE_GETPROCESSTIMES
+#include <windows.h>
+#endif
+#if HAVE_GETPROCESSMEMORYINFO
+#include <windows.h>
+#include <psapi.h>
+#endif
+
+#if HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+#if HAVE_PTHREADS
+#include <pthread.h>
+#endif
+
+#include <time.h>
+
+#include "avconv.h"
+#include "cmdutils.h"
+
+#include "libavutil/avassert.h"
+
+const char program_name[] = "avconv";
+const int program_birth_year = 2000;
+
+static FILE *vstats_file;
+
+static int nb_frames_drop = 0;
+
+static int want_sdp = 1;
+
+#if HAVE_PTHREADS
+/* signal to input threads that they should exit; set by the main thread */
+static int transcoding_finished;
+#endif
+
+InputStream **input_streams = NULL;
+int        nb_input_streams = 0;
+InputFile   **input_files   = NULL;
+int        nb_input_files   = 0;
+
+OutputStream **output_streams = NULL;
+int         nb_output_streams = 0;
+OutputFile   **output_files   = NULL;
+int         nb_output_files   = 0;
+
+FilterGraph **filtergraphs;
+int        nb_filtergraphs;
+
+static void term_exit(void)
+{
+    av_log(NULL, AV_LOG_QUIET, "");
+}
+
+static volatile int received_sigterm = 0;
+static volatile int received_nb_signals = 0;
+
+static void
+sigterm_handler(int sig)
+{
+    received_sigterm = sig;
+    received_nb_signals++;
+    term_exit();
+}
+
+static void term_init(void)
+{
+    signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
+    signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
+#ifdef SIGXCPU
+    signal(SIGXCPU, sigterm_handler);
+#endif
+}
+
+static int decode_interrupt_cb(void *ctx)
+{
+    return received_nb_signals > 1;
+}
+
+const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
+
+static void avconv_cleanup(int ret)
+{
+    int i, j;
+
+    for (i = 0; i < nb_filtergraphs; i++) {
+        FilterGraph *fg = filtergraphs[i];
+        avfilter_graph_free(&fg->graph);
+        for (j = 0; j < fg->nb_inputs; j++) {
+            while (av_fifo_size(fg->inputs[j]->frame_queue)) {
+                AVFrame *frame;
+                av_fifo_generic_read(fg->inputs[j]->frame_queue, &frame,
+                                     sizeof(frame), NULL);
+                av_frame_free(&frame);
+            }
+            av_fifo_free(fg->inputs[j]->frame_queue);
+            av_buffer_unref(&fg->inputs[j]->hw_frames_ctx);
+            av_freep(&fg->inputs[j]->name);
+            av_freep(&fg->inputs[j]);
+        }
+        av_freep(&fg->inputs);
+        for (j = 0; j < fg->nb_outputs; j++) {
+            av_freep(&fg->outputs[j]->name);
+            av_freep(&fg->outputs[j]->formats);
+            av_freep(&fg->outputs[j]->channel_layouts);
+            av_freep(&fg->outputs[j]->sample_rates);
+            av_freep(&fg->outputs[j]);
+        }
+        av_freep(&fg->outputs);
+        av_freep(&fg->graph_desc);
+
+        av_freep(&filtergraphs[i]);
+    }
+    av_freep(&filtergraphs);
+
+    /* close files */
+    for (i = 0; i < nb_output_files; i++) {
+        OutputFile *of = output_files[i];
+        AVFormatContext *s = of->ctx;
+        if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE) && s->pb)
+            avio_close(s->pb);
+        avformat_free_context(s);
+        av_dict_free(&of->opts);
+
+        av_freep(&output_files[i]);
+    }
+    for (i = 0; i < nb_output_streams; i++) {
+        OutputStream *ost = output_streams[i];
+
+        for (j = 0; j < ost->nb_bitstream_filters; j++)
+            av_bsf_free(&ost->bsf_ctx[j]);
+        av_freep(&ost->bsf_ctx);
+
+        av_frame_free(&ost->filtered_frame);
+
+        av_parser_close(ost->parser);
+        avcodec_free_context(&ost->parser_avctx);
+
+        av_freep(&ost->forced_keyframes);
+        av_freep(&ost->avfilter);
+        av_freep(&ost->logfile_prefix);
+
+        avcodec_free_context(&ost->enc_ctx);
+
+        if (ost->muxing_queue) {
+            while (av_fifo_size(ost->muxing_queue)) {
+                AVPacket pkt;
+                av_fifo_generic_read(ost->muxing_queue, &pkt, sizeof(pkt), NULL);
+                av_packet_unref(&pkt);
+            }
+            av_fifo_free(ost->muxing_queue);
+        }
+        av_freep(&output_streams[i]);
+    }
+    for (i = 0; i < nb_input_files; i++) {
+        avformat_close_input(&input_files[i]->ctx);
+        av_freep(&input_files[i]);
+    }
+    for (i = 0; i < nb_input_streams; i++) {
+        InputStream *ist = input_streams[i];
+
+        av_frame_free(&ist->decoded_frame);
+        av_frame_free(&ist->filter_frame);
+        av_dict_free(&ist->decoder_opts);
+        av_freep(&ist->filters);
+        av_freep(&ist->hwaccel_device);
+
+        avcodec_free_context(&ist->dec_ctx);
+
+        av_freep(&input_streams[i]);
+    }
+
+    if (vstats_file)
+        fclose(vstats_file);
+    av_free(vstats_filename);
+
+    av_freep(&input_streams);
+    av_freep(&input_files);
+    av_freep(&output_streams);
+    av_freep(&output_files);
+
+    uninit_opts();
+
+    avformat_network_deinit();
+
+    if (received_sigterm) {
+        av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
+               (int) received_sigterm);
+        exit (255);
+    }
+}
+
+void assert_avoptions(AVDictionary *m)
+{
+    AVDictionaryEntry *t;
+    if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
+        av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
+        exit_program(1);
+    }
+}
+
+static void abort_codec_experimental(AVCodec *c, int encoder)
+{
+    const char *codec_string = encoder ? "encoder" : "decoder";
+    AVCodec *codec;
+    av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
+            "results.\nAdd '-strict experimental' if you want to use it.\n",
+            codec_string, c->name);
+    codec = encoder ? avcodec_find_encoder(c->id) : avcodec_find_decoder(c->id);
+    if (!(codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL))
+        av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
+               codec_string, codec->name);
+    exit_program(1);
+}
+
+static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
+{
+    AVFormatContext *s = of->ctx;
+    AVStream *st = ost->st;
+    int ret;
+
+    if (!of->header_written) {
+        AVPacket tmp_pkt;
+        /* the muxer is not initialized yet, buffer the packet */
+        if (!av_fifo_space(ost->muxing_queue)) {
+            int new_size = FFMIN(2 * av_fifo_size(ost->muxing_queue),
+                                 ost->max_muxing_queue_size);
+            if (new_size <= av_fifo_size(ost->muxing_queue)) {
+                av_log(NULL, AV_LOG_ERROR,
+                       "Too many packets buffered for output stream %d:%d.\n",
+                       ost->file_index, ost->st->index);
+                exit_program(1);
+            }
+            ret = av_fifo_realloc2(ost->muxing_queue, new_size);
+            if (ret < 0)
+                exit_program(1);
+        }
+        av_packet_move_ref(&tmp_pkt, pkt);
+        av_fifo_generic_write(ost->muxing_queue, &tmp_pkt, sizeof(tmp_pkt), NULL);
+        return;
+    }
+
+    /*
+     * Audio encoders may split the packets --  #frames in != #packets out.
+     * But there is no reordering, so we can limit the number of output packets
+     * by simply dropping them here.
+     * Counting encoded video frames needs to be done separately because of
+     * reordering, see do_video_out()
+     */
+    if (!(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && ost->encoding_needed)) {
+        if (ost->frame_number >= ost->max_frames) {
+            av_packet_unref(pkt);
+            return;
+        }
+        ost->frame_number++;
+    }
+    if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+        uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_FACTOR,
+                                              NULL);
+        ost->quality = sd ? *(int *)sd : -1;
+
+        if (ost->frame_rate.num) {
+            pkt->duration = av_rescale_q(1, av_inv_q(ost->frame_rate),
+                                         ost->mux_timebase);
+        }
+    }
+
+    av_packet_rescale_ts(pkt, ost->mux_timebase, ost->st->time_base);
+
+    if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
+        ost->last_mux_dts != AV_NOPTS_VALUE &&
+        pkt->dts < ost->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT)) {
+        av_log(NULL, AV_LOG_WARNING, "Non-monotonous DTS in output stream "
+               "%d:%d; previous: %"PRId64", current: %"PRId64"; ",
+               ost->file_index, ost->st->index, ost->last_mux_dts, pkt->dts);
+        if (exit_on_error) {
+            av_log(NULL, AV_LOG_FATAL, "aborting.\n");
+            exit_program(1);
+        }
+        av_log(NULL, AV_LOG_WARNING, "changing to %"PRId64". This may result "
+               "in incorrect timestamps in the output file.\n",
+               ost->last_mux_dts + 1);
+        pkt->dts = ost->last_mux_dts + 1;
+        if (pkt->pts != AV_NOPTS_VALUE)
+            pkt->pts = FFMAX(pkt->pts, pkt->dts);
+    }
+    ost->last_mux_dts = pkt->dts;
+
+    ost->data_size += pkt->size;
+    ost->packets_written++;
+
+    pkt->stream_index = ost->index;
+
+    ret = av_interleaved_write_frame(s, pkt);
+    if (ret < 0) {
+        print_error("av_interleaved_write_frame()", ret);
+        exit_program(1);
+    }
+}
+
+static void output_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
+{
+    int ret = 0;
+
+    /* apply the output bitstream filters, if any */
+    if (ost->nb_bitstream_filters) {
+        int idx;
+
+        ret = av_bsf_send_packet(ost->bsf_ctx[0], pkt);
+        if (ret < 0)
+            goto finish;
+
+        idx = 1;
+        while (idx) {
+            /* get a packet from the previous filter up the chain */
+            ret = av_bsf_receive_packet(ost->bsf_ctx[idx - 1], pkt);
+            if (ret == AVERROR(EAGAIN)) {
+                ret = 0;
+                idx--;
+                continue;
+            } else if (ret < 0)
+                goto finish;
+
+            /* send it to the next filter down the chain or to the muxer */
+            if (idx < ost->nb_bitstream_filters) {
+                ret = av_bsf_send_packet(ost->bsf_ctx[idx], pkt);
+                if (ret < 0)
+                    goto finish;
+                idx++;
+            } else
+                write_packet(of, pkt, ost);
+        }
+    } else
+        write_packet(of, pkt, ost);
+
+finish:
+    if (ret < 0 && ret != AVERROR_EOF) {
+        av_log(NULL, AV_LOG_FATAL, "Error applying bitstream filters to an output "
+               "packet for stream #%d:%d.\n", ost->file_index, ost->index);
+        exit_program(1);
+    }
+}
+
+static int check_recording_time(OutputStream *ost)
+{
+    OutputFile *of = output_files[ost->file_index];
+
+    if (of->recording_time != INT64_MAX &&
+        av_compare_ts(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, of->recording_time,
+                      AV_TIME_BASE_Q) >= 0) {
+        ost->finished = 1;
+        return 0;
+    }
+    return 1;
+}
+
+static void do_audio_out(OutputFile *of, OutputStream *ost,
+                         AVFrame *frame)
+{
+    AVCodecContext *enc = ost->enc_ctx;
+    AVPacket pkt;
+    int ret;
+
+    av_init_packet(&pkt);
+    pkt.data = NULL;
+    pkt.size = 0;
+
+    if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
+        frame->pts = ost->sync_opts;
+    ost->sync_opts = frame->pts + frame->nb_samples;
+
+    ost->samples_encoded += frame->nb_samples;
+    ost->frames_encoded++;
+
+    ret = avcodec_send_frame(enc, frame);
+    if (ret < 0)
+        goto error;
+
+    while (1) {
+        ret = avcodec_receive_packet(enc, &pkt);
+        if (ret == AVERROR(EAGAIN))
+            break;
+        if (ret < 0)
+            goto error;
+
+        output_packet(of, &pkt, ost);
+    }
+
+    return;
+error:
+    av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
+    exit_program(1);
+}
+
+static void do_subtitle_out(OutputFile *of,
+                            OutputStream *ost,
+                            InputStream *ist,
+                            AVSubtitle *sub,
+                            int64_t pts)
+{
+    static uint8_t *subtitle_out = NULL;
+    int subtitle_out_max_size = 1024 * 1024;
+    int subtitle_out_size, nb, i;
+    AVCodecContext *enc;
+    AVPacket pkt;
+
+    if (pts == AV_NOPTS_VALUE) {
+        av_log(NULL, AV_LOG_ERROR, "Subtitle packets must have a pts\n");
+        if (exit_on_error)
+            exit_program(1);
+        return;
+    }
+
+    enc = ost->enc_ctx;
+
+    if (!subtitle_out) {
+        subtitle_out = av_malloc(subtitle_out_max_size);
+    }
+
+    /* Note: DVB subtitle need one packet to draw them and one other
+       packet to clear them */
+    /* XXX: signal it in the codec context ? */
+    if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
+        nb = 2;
+    else
+        nb = 1;
+
+    for (i = 0; i < nb; i++) {
+        ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
+        if (!check_recording_time(ost))
+            return;
+
+        sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
+        // start_display_time is required to be 0
+        sub->pts               += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
+        sub->end_display_time  -= sub->start_display_time;
+        sub->start_display_time = 0;
+
+        ost->frames_encoded++;
+
+        subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
+                                                    subtitle_out_max_size, sub);
+        if (subtitle_out_size < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Subtitle encoding failed\n");
+            exit_program(1);
+        }
+
+        av_init_packet(&pkt);
+        pkt.data = subtitle_out;
+        pkt.size = subtitle_out_size;
+        pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->mux_timebase);
+        if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
+            /* XXX: the pts correction is handled here. Maybe handling
+               it in the codec would be better */
+            if (i == 0)
+                pkt.pts += 90 * sub->start_display_time;
+            else
+                pkt.pts += 90 * sub->end_display_time;
+        }
+        output_packet(of, &pkt, ost);
+    }
+}
+
+static void do_video_out(OutputFile *of,
+                         OutputStream *ost,
+                         AVFrame *in_picture,
+                         int *frame_size)
+{
+    int ret, format_video_sync;
+    AVPacket pkt;
+    AVCodecContext *enc = ost->enc_ctx;
+
+    *frame_size = 0;
+
+    format_video_sync = video_sync_method;
+    if (format_video_sync == VSYNC_AUTO)
+        format_video_sync = (of->ctx->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
+                            (of->ctx->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
+    if (format_video_sync != VSYNC_PASSTHROUGH &&
+        ost->frame_number &&
+        in_picture->pts != AV_NOPTS_VALUE &&
+        in_picture->pts < ost->sync_opts) {
+        nb_frames_drop++;
+        av_log(NULL, AV_LOG_WARNING,
+               "*** dropping frame %d from stream %d at ts %"PRId64"\n",
+               ost->frame_number, ost->st->index, in_picture->pts);
+        return;
+    }
+
+    if (in_picture->pts == AV_NOPTS_VALUE)
+        in_picture->pts = ost->sync_opts;
+    ost->sync_opts = in_picture->pts;
+
+
+    if (!ost->frame_number)
+        ost->first_pts = in_picture->pts;
+
+    av_init_packet(&pkt);
+    pkt.data = NULL;
+    pkt.size = 0;
+
+    if (ost->frame_number >= ost->max_frames)
+        return;
+
+    if (enc->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
+        ost->top_field_first >= 0)
+        in_picture->top_field_first = !!ost->top_field_first;
+
+    in_picture->quality = enc->global_quality;
+    in_picture->pict_type = 0;
+    if (ost->forced_kf_index < ost->forced_kf_count &&
+        in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
+        in_picture->pict_type = AV_PICTURE_TYPE_I;
+        ost->forced_kf_index++;
+    }
+
+    ost->frames_encoded++;
+
+    ret = avcodec_send_frame(enc, in_picture);
+    if (ret < 0)
+        goto error;
+
+    /*
+     * For video, there may be reordering, so we can't throw away frames on
+     * encoder flush, we need to limit them here, before they go into encoder.
+     */
+    ost->frame_number++;
+
+    while (1) {
+        ret = avcodec_receive_packet(enc, &pkt);
+        if (ret == AVERROR(EAGAIN))
+            break;
+        if (ret < 0)
+            goto error;
+
+        output_packet(of, &pkt, ost);
+        *frame_size = pkt.size;
+
+        /* if two pass, output log */
+        if (ost->logfile && enc->stats_out) {
+            fprintf(ost->logfile, "%s", enc->stats_out);
+        }
+
+        ost->sync_opts++;
+    }
+
+    return;
+error:
+    av_assert0(ret != AVERROR(EAGAIN) && ret != AVERROR_EOF);
+    av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
+    exit_program(1);
+}
+
+#if FF_API_CODED_FRAME && FF_API_ERROR_FRAME
+static double psnr(double d)
+{
+    return -10.0 * log(d) / log(10.0);
+}
+#endif
+
+static void do_video_stats(OutputStream *ost, int frame_size)
+{
+    AVCodecContext *enc;
+    int frame_number;
+    double ti1, bitrate, avg_bitrate;
+
+    /* this is executed just the first time do_video_stats is called */
+    if (!vstats_file) {
+        vstats_file = fopen(vstats_filename, "w");
+        if (!vstats_file) {
+            perror("fopen");
+            exit_program(1);
+        }
+    }
+
+    enc = ost->enc_ctx;
+    if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+        frame_number = ost->frame_number;
+        fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number,
+                ost->quality / (float)FF_QP2LAMBDA);
+
+#if FF_API_CODED_FRAME && FF_API_ERROR_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+        if (enc->flags & AV_CODEC_FLAG_PSNR)
+            fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+        fprintf(vstats_file,"f_size= %6d ", frame_size);
+        /* compute pts value */
+        ti1 = ost->sync_opts * av_q2d(enc->time_base);
+        if (ti1 < 0.01)
+            ti1 = 0.01;
+
+        bitrate     = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
+        avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
+        fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
+               (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+        fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+    }
+}
+
+static int init_output_stream(OutputStream *ost, char *error, int error_len);
+
+/*
+ * Read one frame for lavfi output for ost and encode it.
+ */
+static int poll_filter(OutputStream *ost)
+{
+    OutputFile    *of = output_files[ost->file_index];
+    AVFrame *filtered_frame = NULL;
+    int frame_size, ret;
+
+    if (!ost->filtered_frame && !(ost->filtered_frame = av_frame_alloc())) {
+        return AVERROR(ENOMEM);
+    }
+    filtered_frame = ost->filtered_frame;
+
+    if (!ost->initialized) {
+        char error[1024];
+        ret = init_output_stream(ost, error, sizeof(error));
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing output stream %d:%d -- %s\n",
+                   ost->file_index, ost->index, error);
+            exit_program(1);
+        }
+    }
+
+    if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
+        !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
+        ret = av_buffersink_get_samples(ost->filter->filter, filtered_frame,
+                                         ost->enc_ctx->frame_size);
+    else
+        ret = av_buffersink_get_frame(ost->filter->filter, filtered_frame);
+
+    if (ret < 0)
+        return ret;
+
+    if (filtered_frame->pts != AV_NOPTS_VALUE) {
+        int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
+        filtered_frame->pts = av_rescale_q(filtered_frame->pts,
+                                           ost->filter->filter->inputs[0]->time_base,
+                                           ost->enc_ctx->time_base) -
+                              av_rescale_q(start_time,
+                                           AV_TIME_BASE_Q,
+                                           ost->enc_ctx->time_base);
+    }
+
+    switch (ost->filter->filter->inputs[0]->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        if (!ost->frame_aspect_ratio)
+            ost->enc_ctx->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
+
+        do_video_out(of, ost, filtered_frame, &frame_size);
+        if (vstats_filename && frame_size)
+            do_video_stats(ost, frame_size);
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        do_audio_out(of, ost, filtered_frame);
+        break;
+    default:
+        // TODO support subtitle filters
+        av_assert0(0);
+    }
+
+    av_frame_unref(filtered_frame);
+
+    return 0;
+}
+
+static void finish_output_stream(OutputStream *ost)
+{
+    OutputFile *of = output_files[ost->file_index];
+    int i;
+
+    ost->finished = 1;
+
+    if (of->shortest) {
+        for (i = 0; i < of->ctx->nb_streams; i++)
+            output_streams[of->ost_index + i]->finished = 1;
+    }
+}
+
+/*
+ * Read as many frames from possible from lavfi and encode them.
+ *
+ * Always read from the active stream with the lowest timestamp. If no frames
+ * are available for it then return EAGAIN and wait for more input. This way we
+ * can use lavfi sources that generate unlimited amount of frames without memory
+ * usage exploding.
+ */
+static int poll_filters(void)
+{
+    int i, ret = 0;
+
+    while (ret >= 0 && !received_sigterm) {
+        OutputStream *ost = NULL;
+        int64_t min_pts = INT64_MAX;
+
+        /* choose output stream with the lowest timestamp */
+        for (i = 0; i < nb_output_streams; i++) {
+            int64_t pts = output_streams[i]->sync_opts;
+
+            if (output_streams[i]->filter && !output_streams[i]->filter->graph->graph &&
+                !output_streams[i]->filter->graph->nb_inputs) {
+                ret = configure_filtergraph(output_streams[i]->filter->graph);
+                if (ret < 0) {
+                    av_log(NULL, AV_LOG_ERROR, "Error reinitializing filters!\n");
+                    return ret;
+                }
+            }
+
+            if (!output_streams[i]->filter || output_streams[i]->finished ||
+                !output_streams[i]->filter->graph->graph)
+                continue;
+
+            pts = av_rescale_q(pts, output_streams[i]->enc_ctx->time_base,
+                               AV_TIME_BASE_Q);
+            if (pts < min_pts) {
+                min_pts = pts;
+                ost = output_streams[i];
+            }
+        }
+
+        if (!ost)
+            break;
+
+        ret = poll_filter(ost);
+
+        if (ret == AVERROR_EOF) {
+            finish_output_stream(ost);
+            ret = 0;
+        } else if (ret == AVERROR(EAGAIN))
+            return 0;
+    }
+
+    return ret;
+}
+
+static void print_final_stats(int64_t total_size)
+{
+    uint64_t video_size = 0, audio_size = 0, extra_size = 0, other_size = 0;
+    uint64_t data_size = 0;
+    float percent = -1.0;
+    int i, j;
+
+    for (i = 0; i < nb_output_streams; i++) {
+        OutputStream *ost = output_streams[i];
+        switch (ost->enc_ctx->codec_type) {
+            case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
+            case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
+            default:                 other_size += ost->data_size; break;
+        }
+        extra_size += ost->enc_ctx->extradata_size;
+        data_size  += ost->data_size;
+    }
+
+    if (data_size && total_size >= data_size)
+        percent = 100.0 * (total_size - data_size) / data_size;
+
+    av_log(NULL, AV_LOG_INFO, "\n");
+    av_log(NULL, AV_LOG_INFO, "video:%1.0fkB audio:%1.0fkB other streams:%1.0fkB global headers:%1.0fkB muxing overhead: ",
+           video_size / 1024.0,
+           audio_size / 1024.0,
+           other_size / 1024.0,
+           extra_size / 1024.0);
+    if (percent >= 0.0)
+        av_log(NULL, AV_LOG_INFO, "%f%%", percent);
+    else
+        av_log(NULL, AV_LOG_INFO, "unknown");
+    av_log(NULL, AV_LOG_INFO, "\n");
+
+    /* print verbose per-stream stats */
+    for (i = 0; i < nb_input_files; i++) {
+        InputFile *f = input_files[i];
+        uint64_t total_packets = 0, total_size = 0;
+
+        av_log(NULL, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
+               i, f->ctx->filename);
+
+        for (j = 0; j < f->nb_streams; j++) {
+            InputStream *ist = input_streams[f->ist_index + j];
+            enum AVMediaType type = ist->dec_ctx->codec_type;
+
+            total_size    += ist->data_size;
+            total_packets += ist->nb_packets;
+
+            av_log(NULL, AV_LOG_VERBOSE, "  Input stream #%d:%d (%s): ",
+                   i, j, media_type_string(type));
+            av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
+                   ist->nb_packets, ist->data_size);
+
+            if (ist->decoding_needed) {
+                av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames decoded",
+                       ist->frames_decoded);
+                if (type == AVMEDIA_TYPE_AUDIO)
+                    av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->samples_decoded);
+                av_log(NULL, AV_LOG_VERBOSE, "; ");
+            }
+
+            av_log(NULL, AV_LOG_VERBOSE, "\n");
+        }
+
+        av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
+               total_packets, total_size);
+    }
+
+    for (i = 0; i < nb_output_files; i++) {
+        OutputFile *of = output_files[i];
+        uint64_t total_packets = 0, total_size = 0;
+
+        av_log(NULL, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
+               i, of->ctx->filename);
+
+        for (j = 0; j < of->ctx->nb_streams; j++) {
+            OutputStream *ost = output_streams[of->ost_index + j];
+            enum AVMediaType type = ost->enc_ctx->codec_type;
+
+            total_size    += ost->data_size;
+            total_packets += ost->packets_written;
+
+            av_log(NULL, AV_LOG_VERBOSE, "  Output stream #%d:%d (%s): ",
+                   i, j, media_type_string(type));
+            if (ost->encoding_needed) {
+                av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
+                       ost->frames_encoded);
+                if (type == AVMEDIA_TYPE_AUDIO)
+                    av_log(NULL, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
+                av_log(NULL, AV_LOG_VERBOSE, "; ");
+            }
+
+            av_log(NULL, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
+                   ost->packets_written, ost->data_size);
+
+            av_log(NULL, AV_LOG_VERBOSE, "\n");
+        }
+
+        av_log(NULL, AV_LOG_VERBOSE, "  Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
+               total_packets, total_size);
+    }
+}
+
+static void print_report(int is_last_report, int64_t timer_start)
+{
+    char buf[1024];
+    OutputStream *ost;
+    AVFormatContext *oc;
+    int64_t total_size = 0;
+    AVCodecContext *enc;
+    int frame_number, vid, i;
+    double bitrate, ti1, pts;
+    static int64_t last_time = -1;
+    static int qp_histogram[52];
+
+    if (!print_stats && !is_last_report)
+        return;
+
+    if (!is_last_report) {
+        int64_t cur_time;
+        /* display the report every 0.5 seconds */
+        cur_time = av_gettime_relative();
+        if (last_time == -1) {
+            last_time = cur_time;
+            return;
+        }
+        if ((cur_time - last_time) < 500000)
+            return;
+        last_time = cur_time;
+    }
+
+
+    oc = output_files[0]->ctx;
+    if (oc->pb) {
+        total_size = avio_size(oc->pb);
+        if (total_size <= 0) // FIXME improve avio_size() so it works with non seekable output too
+            total_size = avio_tell(oc->pb);
+        if (total_size < 0) {
+            char errbuf[128];
+            av_strerror(total_size, errbuf, sizeof(errbuf));
+            av_log(NULL, AV_LOG_VERBOSE, "Bitrate not available, "
+                   "avio_tell() failed: %s\n", errbuf);
+            total_size = 0;
+        }
+    }
+
+    buf[0] = '\0';
+    ti1 = 1e10;
+    vid = 0;
+    for (i = 0; i < nb_output_streams; i++) {
+        float q = -1;
+        ost = output_streams[i];
+        enc = ost->enc_ctx;
+        if (!ost->stream_copy)
+            q = ost->quality / (float) FF_QP2LAMBDA;
+
+        if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
+        }
+        if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+            float t = (av_gettime_relative() - timer_start) / 1000000.0;
+
+            frame_number = ost->frame_number;
+            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
+                     frame_number, (t > 1) ? (int)(frame_number / t + 0.5) : 0, q);
+            if (is_last_report)
+                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
+            if (qp_hist) {
+                int j;
+                int qp = lrintf(q);
+                if (qp >= 0 && qp < FF_ARRAY_ELEMS(qp_histogram))
+                    qp_histogram[qp]++;
+                for (j = 0; j < 32; j++)
+                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
+            }
+
+#if FF_API_CODED_FRAME && FF_API_ERROR_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+            if (enc->flags & AV_CODEC_FLAG_PSNR) {
+                int j;
+                double error, error_sum = 0;
+                double scale, scale_sum = 0;
+                char type[3] = { 'Y','U','V' };
+                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
+                for (j = 0; j < 3; j++) {
+                    if (is_last_report) {
+                        error = enc->error[j];
+                        scale = enc->width * enc->height * 255.0 * 255.0 * frame_number;
+                    } else {
+                        error = enc->coded_frame->error[j];
+                        scale = enc->width * enc->height * 255.0 * 255.0;
+                    }
+                    if (j)
+                        scale /= 4;
+                    error_sum += error;
+                    scale_sum += scale;
+                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error / scale));
+                }
+                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
+            }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+            vid = 1;
+        }
+        /* compute min output value */
+        pts = (double)ost->last_mux_dts * av_q2d(ost->st->time_base);
+        if ((pts < ti1) && (pts > 0))
+            ti1 = pts;
+    }
+    if (ti1 < 0.01)
+        ti1 = 0.01;
+
+    bitrate = (double)(total_size * 8) / ti1 / 1000.0;
+
+    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+            "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
+            (double)total_size / 1024, ti1, bitrate);
+
+    if (nb_frames_drop)
+        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " drop=%d",
+                 nb_frames_drop);
+
+    av_log(NULL, AV_LOG_INFO, "%s    \r", buf);
+
+    fflush(stderr);
+
+    if (is_last_report)
+        print_final_stats(total_size);
+
+}
+
+static void flush_encoders(void)
+{
+    int i, ret;
+
+    for (i = 0; i < nb_output_streams; i++) {
+        OutputStream   *ost = output_streams[i];
+        AVCodecContext *enc = ost->enc_ctx;
+        OutputFile      *of = output_files[ost->file_index];
+        int stop_encoding = 0;
+
+        if (!ost->encoding_needed)
+            continue;
+
+        if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
+            continue;
+
+        if (enc->codec_type != AVMEDIA_TYPE_VIDEO && enc->codec_type != AVMEDIA_TYPE_AUDIO)
+            continue;
+
+        avcodec_send_frame(enc, NULL);
+
+        for (;;) {
+            const char *desc = NULL;
+
+            switch (enc->codec_type) {
+            case AVMEDIA_TYPE_AUDIO:
+                desc   = "Audio";
+                break;
+            case AVMEDIA_TYPE_VIDEO:
+                desc   = "Video";
+                break;
+            default:
+                av_assert0(0);
+            }
+
+            if (1) {
+                AVPacket pkt;
+                av_init_packet(&pkt);
+                pkt.data = NULL;
+                pkt.size = 0;
+
+                ret = avcodec_receive_packet(enc, &pkt);
+                if (ret < 0 && ret != AVERROR_EOF) {
+                    av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
+                    exit_program(1);
+                }
+                if (ost->logfile && enc->stats_out) {
+                    fprintf(ost->logfile, "%s", enc->stats_out);
+                }
+                if (ret == AVERROR_EOF) {
+                    stop_encoding = 1;
+                    break;
+                }
+                output_packet(of, &pkt, ost);
+            }
+
+            if (stop_encoding)
+                break;
+        }
+    }
+}
+
+/*
+ * Check whether a packet from ist should be written into ost at this time
+ */
+static int check_output_constraints(InputStream *ist, OutputStream *ost)
+{
+    OutputFile *of = output_files[ost->file_index];
+    int ist_index  = input_files[ist->file_index]->ist_index + ist->st->index;
+
+    if (ost->source_index != ist_index)
+        return 0;
+
+    if (of->start_time != AV_NOPTS_VALUE && ist->last_dts < of->start_time)
+        return 0;
+
+    return 1;
+}
+
+static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *pkt)
+{
+    OutputFile *of = output_files[ost->file_index];
+    InputFile   *f = input_files [ist->file_index];
+    int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
+    int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->mux_timebase);
+    AVPacket opkt;
+
+    av_init_packet(&opkt);
+
+    if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
+        !ost->copy_initial_nonkeyframes)
+        return;
+
+    if (of->recording_time != INT64_MAX &&
+        ist->last_dts >= of->recording_time + start_time) {
+        ost->finished = 1;
+        return;
+    }
+
+    if (f->recording_time != INT64_MAX) {
+        start_time = f->ctx->start_time;
+        if (f->start_time != AV_NOPTS_VALUE)
+            start_time += f->start_time;
+        if (ist->last_dts >= f->recording_time + start_time) {
+            ost->finished = 1;
+            return;
+        }
+    }
+
+    /* force the input stream PTS */
+    if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
+        ost->sync_opts++;
+
+    if (pkt->pts != AV_NOPTS_VALUE)
+        opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->mux_timebase) - ost_tb_start_time;
+    else
+        opkt.pts = AV_NOPTS_VALUE;
+
+    if (pkt->dts == AV_NOPTS_VALUE)
+        opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->mux_timebase);
+    else
+        opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->mux_timebase);
+    opkt.dts -= ost_tb_start_time;
+
+    opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->mux_timebase);
+    opkt.flags    = pkt->flags;
+
+    // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
+    if (  ost->enc_ctx->codec_id != AV_CODEC_ID_H264
+       && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG1VIDEO
+       && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG2VIDEO
+       && ost->enc_ctx->codec_id != AV_CODEC_ID_VC1
+       ) {
+        if (av_parser_change(ost->parser, ost->parser_avctx,
+                             &opkt.data, &opkt.size,
+                             pkt->data, pkt->size,
+                             pkt->flags & AV_PKT_FLAG_KEY)) {
+            opkt.buf = av_buffer_create(opkt.data, opkt.size, av_buffer_default_free, NULL, 0);
+            if (!opkt.buf)
+                exit_program(1);
+        }
+    } else {
+        opkt.data = pkt->data;
+        opkt.size = pkt->size;
+    }
+
+    output_packet(of, &opkt, ost);
+}
+
+static int ifilter_send_frame(InputFilter *ifilter, AVFrame *frame)
+{
+    FilterGraph *fg = ifilter->graph;
+    int need_reinit, ret, i;
+
+    /* determine if the parameters for this input changed */
+    need_reinit = ifilter->format != frame->format;
+    if (!!ifilter->hw_frames_ctx != !!frame->hw_frames_ctx ||
+        (ifilter->hw_frames_ctx && ifilter->hw_frames_ctx->data != frame->hw_frames_ctx->data))
+        need_reinit = 1;
+
+    switch (ifilter->ist->st->codecpar->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        need_reinit |= ifilter->sample_rate    != frame->sample_rate ||
+                       ifilter->channel_layout != frame->channel_layout;
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        need_reinit |= ifilter->width  != frame->width ||
+                       ifilter->height != frame->height;
+        break;
+    }
+
+    if (need_reinit) {
+        ret = ifilter_parameters_from_frame(ifilter, frame);
+        if (ret < 0)
+            return ret;
+    }
+
+    /* (re)init the graph if possible, otherwise buffer the frame and return */
+    if (need_reinit || !fg->graph) {
+        for (i = 0; i < fg->nb_inputs; i++) {
+            if (fg->inputs[i]->format < 0) {
+                AVFrame *tmp = av_frame_clone(frame);
+                if (!tmp)
+                    return AVERROR(ENOMEM);
+                av_frame_unref(frame);
+
+                if (!av_fifo_space(ifilter->frame_queue)) {
+                    ret = av_fifo_realloc2(ifilter->frame_queue, 2 * av_fifo_size(ifilter->frame_queue));
+                    if (ret < 0)
+                        return ret;
+                }
+                av_fifo_generic_write(ifilter->frame_queue, &tmp, sizeof(tmp), NULL);
+                return 0;
+            }
+        }
+
+        ret = poll_filters();
+        if (ret < 0 && ret != AVERROR_EOF) {
+            char errbuf[128];
+            av_strerror(ret, errbuf, sizeof(errbuf));
+
+            av_log(NULL, AV_LOG_ERROR, "Error while filtering: %s\n", errbuf);
+            return ret;
+        }
+
+        ret = configure_filtergraph(fg);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error reinitializing filters!\n");
+            return ret;
+        }
+    }
+
+    ret = av_buffersrc_add_frame(ifilter->filter, frame);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Error while filtering\n");
+        return ret;
+    }
+
+    return 0;
+}
+
+static int ifilter_send_eof(InputFilter *ifilter)
+{
+    int i, j, ret;
+
+    ifilter->eof = 1;
+
+    if (ifilter->filter) {
+        ret = av_buffersrc_add_frame(ifilter->filter, NULL);
+        if (ret < 0)
+            return ret;
+    } else {
+        // the filtergraph was never configured
+        FilterGraph *fg = ifilter->graph;
+        for (i = 0; i < fg->nb_inputs; i++)
+            if (!fg->inputs[i]->eof)
+                break;
+        if (i == fg->nb_inputs) {
+            // All the input streams have finished without the filtergraph
+            // ever being configured.
+            // Mark the output streams as finished.
+            for (j = 0; j < fg->nb_outputs; j++)
+                finish_output_stream(fg->outputs[j]->ost);
+        }
+    }
+
+    return 0;
+}
+
+// This does not quite work like avcodec_decode_audio4/avcodec_decode_video2.
+// There is the following difference: if you got a frame, you must call
+// it again with pkt=NULL. pkt==NULL is treated differently from pkt.size==0
+// (pkt==NULL means get more output, pkt.size==0 is a flush/drain packet)
+static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
+{
+    int ret;
+
+    *got_frame = 0;
+
+    if (pkt) {
+        ret = avcodec_send_packet(avctx, pkt);
+        // In particular, we don't expect AVERROR(EAGAIN), because we read all
+        // decoded frames with avcodec_receive_frame() until done.
+        if (ret < 0)
+            return ret == AVERROR_EOF ? 0 : ret;
+    }
+
+    ret = avcodec_receive_frame(avctx, frame);
+    if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+        return ret;
+    if (ret >= 0)
+        *got_frame = 1;
+
+    return 0;
+}
+
+int guess_input_channel_layout(InputStream *ist)
+{
+    AVCodecContext *dec = ist->dec_ctx;
+
+    if (!dec->channel_layout) {
+        char layout_name[256];
+
+        dec->channel_layout = av_get_default_channel_layout(dec->channels);
+        if (!dec->channel_layout)
+            return 0;
+        av_get_channel_layout_string(layout_name, sizeof(layout_name),
+                                     dec->channels, dec->channel_layout);
+        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Input Stream "
+               "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
+    }
+    return 1;
+}
+
+static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output,
+                        int *decode_failed)
+{
+    AVFrame *decoded_frame, *f;
+    AVCodecContext *avctx = ist->dec_ctx;
+    int i, ret, err = 0;
+
+    if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    decoded_frame = ist->decoded_frame;
+
+    ret = decode(avctx, decoded_frame, got_output, pkt);
+    if (ret < 0)
+        *decode_failed = 1;
+    if (!*got_output || ret < 0)
+        return ret;
+
+    ist->samples_decoded += decoded_frame->nb_samples;
+    ist->frames_decoded++;
+
+    /* if the decoder provides a pts, use it instead of the last packet pts.
+       the decoder could be delaying output by a packet or more. */
+    if (decoded_frame->pts != AV_NOPTS_VALUE)
+        ist->next_dts = av_rescale_q(decoded_frame->pts, ist->st->time_base, AV_TIME_BASE_Q);
+    else if (pkt && pkt->pts != AV_NOPTS_VALUE) {
+        decoded_frame->pts = pkt->pts;
+    }
+
+    if (decoded_frame->pts != AV_NOPTS_VALUE)
+        decoded_frame->pts = av_rescale_q(decoded_frame->pts,
+                                          ist->st->time_base,
+                                          (AVRational){1, avctx->sample_rate});
+    ist->nb_samples = decoded_frame->nb_samples;
+    for (i = 0; i < ist->nb_filters; i++) {
+        if (i < ist->nb_filters - 1) {
+            f = ist->filter_frame;
+            err = av_frame_ref(f, decoded_frame);
+            if (err < 0)
+                break;
+        } else
+            f = decoded_frame;
+
+        err = ifilter_send_frame(ist->filters[i], f);
+        if (err < 0)
+            break;
+    }
+
+    av_frame_unref(ist->filter_frame);
+    av_frame_unref(decoded_frame);
+    return err < 0 ? err : ret;
+}
+
+static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output,
+                        int *decode_failed)
+{
+    AVFrame *decoded_frame, *f;
+    int i, ret = 0, err = 0;
+
+    if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    if (!ist->filter_frame && !(ist->filter_frame = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    decoded_frame = ist->decoded_frame;
+
+    ret = decode(ist->dec_ctx, decoded_frame, got_output, pkt);
+    if (ret < 0)
+        *decode_failed = 1;
+    if (!*got_output || ret < 0)
+        return ret;
+
+    ist->frames_decoded++;
+
+    if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
+        err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
+        if (err < 0)
+            goto fail;
+    }
+    ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
+
+    decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pts,
+                                           decoded_frame->pkt_dts);
+    if (ist->framerate.num)
+        decoded_frame->pts = ist->cfr_next_pts++;
+
+    if (ist->st->sample_aspect_ratio.num)
+        decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
+
+    for (i = 0; i < ist->nb_filters; i++) {
+        if (i < ist->nb_filters - 1) {
+            f = ist->filter_frame;
+            err = av_frame_ref(f, decoded_frame);
+            if (err < 0)
+                break;
+        } else
+            f = decoded_frame;
+
+        err = ifilter_send_frame(ist->filters[i], f);
+        if (err < 0)
+            break;
+    }
+
+fail:
+    av_frame_unref(ist->filter_frame);
+    av_frame_unref(decoded_frame);
+    return err < 0 ? err : ret;
+}
+
+static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output,
+                               int *decode_failed)
+{
+    AVSubtitle subtitle;
+    int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
+                                          &subtitle, got_output, pkt);
+    if (ret < 0) {
+        *decode_failed = 1;
+        return ret;
+    }
+    if (!*got_output)
+        return ret;
+
+    ist->frames_decoded++;
+
+    for (i = 0; i < nb_output_streams; i++) {
+        OutputStream *ost = output_streams[i];
+
+        if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
+            continue;
+
+        do_subtitle_out(output_files[ost->file_index], ost, ist, &subtitle, pkt->pts);
+    }
+
+    avsubtitle_free(&subtitle);
+    return ret;
+}
+
+static int send_filter_eof(InputStream *ist)
+{
+    int i, ret;
+    for (i = 0; i < ist->nb_filters; i++) {
+        ret = ifilter_send_eof(ist->filters[i]);
+        if (ret < 0)
+            return ret;
+    }
+    return 0;
+}
+
+/* pkt = NULL means EOF (needed to flush decoder buffers) */
+static void process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eof)
+{
+    int i;
+    int repeating = 0;
+    AVPacket avpkt;
+
+    if (ist->next_dts == AV_NOPTS_VALUE)
+        ist->next_dts = ist->last_dts;
+
+    if (!pkt) {
+        /* EOF handling */
+        av_init_packet(&avpkt);
+        avpkt.data = NULL;
+        avpkt.size = 0;
+    } else {
+        avpkt = *pkt;
+    }
+
+    if (pkt && pkt->dts != AV_NOPTS_VALUE)
+        ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
+
+    // while we have more to decode or while the decoder did output something on EOF
+    while (ist->decoding_needed && (!pkt || avpkt.size > 0)) {
+        int ret = 0;
+        int got_output = 0;
+        int decode_failed = 0;
+
+        if (!repeating)
+            ist->last_dts = ist->next_dts;
+
+        switch (ist->dec_ctx->codec_type) {
+        case AVMEDIA_TYPE_AUDIO:
+            ret = decode_audio    (ist, repeating ? NULL : &avpkt, &got_output,
+                                   &decode_failed);
+            break;
+        case AVMEDIA_TYPE_VIDEO:
+            ret = decode_video    (ist, repeating ? NULL : &avpkt, &got_output,
+                                   &decode_failed);
+            if (repeating && !got_output)
+                ;
+            else if (pkt && pkt->duration)
+                ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
+            else if (ist->st->avg_frame_rate.num)
+                ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
+                                              AV_TIME_BASE_Q);
+            else if (ist->dec_ctx->framerate.num != 0) {
+                int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
+                                                   ist->dec_ctx->ticks_per_frame;
+                ist->next_dts += av_rescale_q(ticks, ist->dec_ctx->framerate, AV_TIME_BASE_Q);
+            }
+            break;
+        case AVMEDIA_TYPE_SUBTITLE:
+            if (repeating)
+                break;
+            ret = transcode_subtitles(ist, &avpkt, &got_output, &decode_failed);
+            break;
+        default:
+            return;
+        }
+
+        if (ret < 0) {
+            if (decode_failed) {
+                av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
+                       ist->file_index, ist->st->index);
+            } else {
+                av_log(NULL, AV_LOG_FATAL, "Error while processing the decoded "
+                       "data for stream #%d:%d\n", ist->file_index, ist->st->index);
+            }
+            if (!decode_failed || exit_on_error)
+                exit_program(1);
+            break;
+        }
+
+        if (!got_output)
+            break;
+
+        repeating = 1;
+    }
+
+    /* after flushing, send an EOF on all the filter inputs attached to the stream */
+    /* except when looping we need to flush but not to send an EOF */
+    if (!pkt && ist->decoding_needed && !no_eof) {
+        int ret = send_filter_eof(ist);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Error marking filters as finished\n");
+            exit_program(1);
+        }
+    }
+
+    /* handle stream copy */
+    if (!ist->decoding_needed) {
+        ist->last_dts = ist->next_dts;
+        switch (ist->dec_ctx->codec_type) {
+        case AVMEDIA_TYPE_AUDIO:
+            ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
+                             ist->dec_ctx->sample_rate;
+            break;
+        case AVMEDIA_TYPE_VIDEO:
+            if (ist->dec_ctx->framerate.num != 0) {
+                int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
+                ist->next_dts += ((int64_t)AV_TIME_BASE *
+                                  ist->dec_ctx->framerate.den * ticks) /
+                                  ist->dec_ctx->framerate.num;
+            }
+            break;
+        }
+    }
+    for (i = 0; pkt && i < nb_output_streams; i++) {
+        OutputStream *ost = output_streams[i];
+
+        if (!check_output_constraints(ist, ost) || ost->encoding_needed)
+            continue;
+
+        do_streamcopy(ist, ost, pkt);
+    }
+
+    return;
+}
+
+static void print_sdp(void)
+{
+    char sdp[16384];
+    int i;
+    AVFormatContext **avc;
+
+    for (i = 0; i < nb_output_files; i++) {
+        if (!output_files[i]->header_written)
+            return;
+    }
+
+    avc = av_malloc(sizeof(*avc) * nb_output_files);
+    if (!avc)
+        exit_program(1);
+    for (i = 0; i < nb_output_files; i++)
+        avc[i] = output_files[i]->ctx;
+
+    av_sdp_create(avc, nb_output_files, sdp, sizeof(sdp));
+    printf("SDP:\n%s\n", sdp);
+    fflush(stdout);
+    av_freep(&avc);
+}
+
+static const HWAccel *get_hwaccel(enum AVPixelFormat pix_fmt)
+{
+    int i;
+    for (i = 0; hwaccels[i].name; i++)
+        if (hwaccels[i].pix_fmt == pix_fmt)
+            return &hwaccels[i];
+    return NULL;
+}
+
+static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
+{
+    InputStream *ist = s->opaque;
+    const enum AVPixelFormat *p;
+    int ret;
+
+    for (p = pix_fmts; *p != -1; p++) {
+        const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(*p);
+        const HWAccel *hwaccel;
+
+        if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
+            break;
+
+        hwaccel = get_hwaccel(*p);
+        if (!hwaccel ||
+            (ist->active_hwaccel_id && ist->active_hwaccel_id != hwaccel->id) ||
+            (ist->hwaccel_id != HWACCEL_AUTO && ist->hwaccel_id != hwaccel->id))
+            continue;
+
+        ret = hwaccel->init(s);
+        if (ret < 0) {
+            if (ist->hwaccel_id == hwaccel->id) {
+                av_log(NULL, AV_LOG_FATAL,
+                       "%s hwaccel requested for input stream #%d:%d, "
+                       "but cannot be initialized.\n", hwaccel->name,
+                       ist->file_index, ist->st->index);
+                return AV_PIX_FMT_NONE;
+            }
+            continue;
+        }
+
+        if (ist->hw_frames_ctx) {
+            s->hw_frames_ctx = av_buffer_ref(ist->hw_frames_ctx);
+            if (!s->hw_frames_ctx)
+                return AV_PIX_FMT_NONE;
+        }
+
+        ist->active_hwaccel_id = hwaccel->id;
+        ist->hwaccel_pix_fmt   = *p;
+        break;
+    }
+
+    return *p;
+}
+
+static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
+{
+    InputStream *ist = s->opaque;
+
+    if (ist->hwaccel_get_buffer && frame->format == ist->hwaccel_pix_fmt)
+        return ist->hwaccel_get_buffer(s, frame, flags);
+
+    return avcodec_default_get_buffer2(s, frame, flags);
+}
+
+static int init_input_stream(int ist_index, char *error, int error_len)
+{
+    int ret;
+    InputStream *ist = input_streams[ist_index];
+
+    if (ist->decoding_needed) {
+        AVCodec *codec = ist->dec;
+        if (!codec) {
+            snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
+                    ist->dec_ctx->codec_id, ist->file_index, ist->st->index);
+            return AVERROR(EINVAL);
+        }
+
+        ist->dec_ctx->opaque                = ist;
+        ist->dec_ctx->get_format            = get_format;
+        ist->dec_ctx->get_buffer2           = get_buffer;
+        ist->dec_ctx->thread_safe_callbacks = 1;
+
+        av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
+
+        if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
+            av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
+        if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
+            char errbuf[128];
+            if (ret == AVERROR_EXPERIMENTAL)
+                abort_codec_experimental(codec, 0);
+
+            av_strerror(ret, errbuf, sizeof(errbuf));
+
+            snprintf(error, error_len,
+                     "Error while opening decoder for input stream "
+                     "#%d:%d : %s",
+                     ist->file_index, ist->st->index, errbuf);
+            return ret;
+        }
+        assert_avoptions(ist->decoder_opts);
+    }
+
+    ist->last_dts = ist->st->avg_frame_rate.num ? - ist->dec_ctx->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
+    ist->next_dts = AV_NOPTS_VALUE;
+    init_pts_correction(&ist->pts_ctx);
+
+    return 0;
+}
+
+static InputStream *get_input_stream(OutputStream *ost)
+{
+    if (ost->source_index >= 0)
+        return input_streams[ost->source_index];
+
+    if (ost->filter) {
+        FilterGraph *fg = ost->filter->graph;
+        int i;
+
+        for (i = 0; i < fg->nb_inputs; i++)
+            if (fg->inputs[i]->ist->dec_ctx->codec_type == ost->enc_ctx->codec_type)
+                return fg->inputs[i]->ist;
+    }
+
+    return NULL;
+}
+
+/* open the muxer when all the streams are initialized */
+static int check_init_output_file(OutputFile *of, int file_index)
+{
+    int ret, i;
+
+    for (i = 0; i < of->ctx->nb_streams; i++) {
+        OutputStream *ost = output_streams[of->ost_index + i];
+        if (!ost->initialized)
+            return 0;
+    }
+
+    of->ctx->interrupt_callback = int_cb;
+
+    ret = avformat_write_header(of->ctx, &of->opts);
+    if (ret < 0) {
+        char errbuf[128];
+
+        av_strerror(ret, errbuf, sizeof(errbuf));
+
+        av_log(NULL, AV_LOG_ERROR,
+               "Could not write header for output file #%d "
+               "(incorrect codec parameters ?): %s",
+               file_index, errbuf);
+        return ret;
+    }
+    assert_avoptions(of->opts);
+    of->header_written = 1;
+
+    av_dump_format(of->ctx, file_index, of->ctx->filename, 1);
+
+    if (want_sdp)
+        print_sdp();
+
+    /* flush the muxing queues */
+    for (i = 0; i < of->ctx->nb_streams; i++) {
+        OutputStream *ost = output_streams[of->ost_index + i];
+
+        while (av_fifo_size(ost->muxing_queue)) {
+            AVPacket pkt;
+            av_fifo_generic_read(ost->muxing_queue, &pkt, sizeof(pkt), NULL);
+            write_packet(of, &pkt, ost);
+        }
+    }
+
+    return 0;
+}
+
+static int init_output_bsfs(OutputStream *ost)
+{
+    AVBSFContext *ctx;
+    int i, ret;
+
+    if (!ost->nb_bitstream_filters)
+        return 0;
+
+    for (i = 0; i < ost->nb_bitstream_filters; i++) {
+        ctx = ost->bsf_ctx[i];
+
+        ret = avcodec_parameters_copy(ctx->par_in,
+                                      i ? ost->bsf_ctx[i - 1]->par_out : ost->st->codecpar);
+        if (ret < 0)
+            return ret;
+
+        ctx->time_base_in = i ? ost->bsf_ctx[i - 1]->time_base_out : ost->st->time_base;
+
+        ret = av_bsf_init(ctx);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing bitstream filter: %s\n",
+                   ctx->filter->name);
+            return ret;
+        }
+    }
+
+    ret = avcodec_parameters_copy(ost->st->codecpar, ctx->par_out);
+    if (ret < 0)
+        return ret;
+
+    ost->st->time_base = ctx->time_base_out;
+
+    return 0;
+}
+
+static int init_output_stream_streamcopy(OutputStream *ost)
+{
+    OutputFile *of = output_files[ost->file_index];
+    InputStream *ist = get_input_stream(ost);
+    AVCodecParameters *par_dst = ost->st->codecpar;
+    AVCodecParameters *par_src = ist->st->codecpar;
+    AVRational sar;
+    uint32_t codec_tag = par_dst->codec_tag;
+    int i, ret;
+
+    if (!codec_tag) {
+        if (!of->ctx->oformat->codec_tag ||
+             av_codec_get_id (of->ctx->oformat->codec_tag, par_src->codec_tag) == par_src->codec_id ||
+             av_codec_get_tag(of->ctx->oformat->codec_tag, par_src->codec_id) <= 0)
+            codec_tag = par_src->codec_tag;
+    }
+
+    ret = avcodec_parameters_copy(par_dst, par_src);
+    if (ret < 0)
+        return ret;
+
+    par_dst->codec_tag = codec_tag;
+
+    ost->st->disposition = ist->st->disposition;
+
+    ost->st->time_base = ist->st->time_base;
+
+    if (ost->bitrate_override)
+        par_dst->bit_rate = ost->bitrate_override;
+
+    if (ist->st->nb_side_data) {
+        ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
+                                              sizeof(*ist->st->side_data));
+        if (!ost->st->side_data)
+            return AVERROR(ENOMEM);
+
+        for (i = 0; i < ist->st->nb_side_data; i++) {
+            const AVPacketSideData *sd_src = &ist->st->side_data[i];
+            AVPacketSideData *sd_dst = &ost->st->side_data[i];
+
+            sd_dst->data = av_malloc(sd_src->size);
+            if (!sd_dst->data)
+                return AVERROR(ENOMEM);
+            memcpy(sd_dst->data, sd_src->data, sd_src->size);
+            sd_dst->size = sd_src->size;
+            sd_dst->type = sd_src->type;
+            ost->st->nb_side_data++;
+        }
+    }
+
+    ost->parser = av_parser_init(par_dst->codec_id);
+    ost->parser_avctx = avcodec_alloc_context3(NULL);
+    if (!ost->parser_avctx)
+        return AVERROR(ENOMEM);
+
+    if (par_dst->codec_type == AVMEDIA_TYPE_VIDEO) {
+        if (ost->frame_aspect_ratio)
+            sar = av_d2q(ost->frame_aspect_ratio * par_dst->height / par_dst->width, 255);
+        else if (ist->st->sample_aspect_ratio.num)
+            sar = ist->st->sample_aspect_ratio;
+        else
+            sar = par_src->sample_aspect_ratio;
+        ost->st->sample_aspect_ratio = par_dst->sample_aspect_ratio = sar;
+    }
+
+    return 0;
+}
+
+static void set_encoder_id(OutputFile *of, OutputStream *ost)
+{
+    AVDictionaryEntry *e;
+
+    uint8_t *encoder_string;
+    int encoder_string_len;
+    int format_flags = 0;
+
+    e = av_dict_get(of->opts, "fflags", NULL, 0);
+    if (e) {
+        const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
+        if (!o)
+            return;
+        av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
+    }
+
+    encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
+    encoder_string     = av_mallocz(encoder_string_len);
+    if (!encoder_string)
+        exit_program(1);
+
+    if (!(format_flags & AVFMT_FLAG_BITEXACT))
+        av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
+    av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
+    av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
+                AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
+}
+
+static void parse_forced_key_frames(char *kf, OutputStream *ost,
+                                    AVCodecContext *avctx)
+{
+    char *p;
+    int n = 1, i;
+    int64_t t;
+
+    for (p = kf; *p; p++)
+        if (*p == ',')
+            n++;
+    ost->forced_kf_count = n;
+    ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
+    if (!ost->forced_kf_pts) {
+        av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
+        exit_program(1);
+    }
+
+    p = kf;
+    for (i = 0; i < n; i++) {
+        char *next = strchr(p, ',');
+
+        if (next)
+            *next++ = 0;
+
+        t = parse_time_or_die("force_key_frames", p, 1);
+        ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
+
+        p = next;
+    }
+}
+
+static int init_output_stream_encode(OutputStream *ost)
+{
+    InputStream *ist = get_input_stream(ost);
+    AVCodecContext *enc_ctx = ost->enc_ctx;
+    AVCodecContext *dec_ctx = NULL;
+
+    set_encoder_id(output_files[ost->file_index], ost);
+
+    if (ist) {
+        ost->st->disposition = ist->st->disposition;
+
+        dec_ctx = ist->dec_ctx;
+
+        enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
+        enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
+    }
+
+    switch (enc_ctx->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
+        enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
+        enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
+        enc_ctx->channels       = av_get_channel_layout_nb_channels(enc_ctx->channel_layout);
+        enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
+
+        enc_ctx->width  = ost->filter->filter->inputs[0]->w;
+        enc_ctx->height = ost->filter->filter->inputs[0]->h;
+        enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
+            ost->frame_aspect_ratio ? // overridden by the -aspect cli option
+            av_d2q(ost->frame_aspect_ratio * enc_ctx->height/enc_ctx->width, 255) :
+            ost->filter->filter->inputs[0]->sample_aspect_ratio;
+        enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
+
+        enc_ctx->framerate = ost->frame_rate;
+
+        ost->st->avg_frame_rate = ost->frame_rate;
+
+        if (dec_ctx &&
+            (enc_ctx->width   != dec_ctx->width  ||
+             enc_ctx->height  != dec_ctx->height ||
+             enc_ctx->pix_fmt != dec_ctx->pix_fmt)) {
+            enc_ctx->bits_per_raw_sample = 0;
+        }
+
+        if (ost->forced_keyframes)
+            parse_forced_key_frames(ost->forced_keyframes, ost,
+                                    ost->enc_ctx);
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        enc_ctx->time_base = (AVRational){1, 1000};
+        break;
+    default:
+        abort();
+        break;
+    }
+
+    return 0;
+}
+
+static int init_output_stream(OutputStream *ost, char *error, int error_len)
+{
+    int ret = 0;
+
+    if (ost->encoding_needed) {
+        AVCodec      *codec = ost->enc;
+        AVCodecContext *dec = NULL;
+        InputStream *ist;
+
+        ret = init_output_stream_encode(ost);
+        if (ret < 0)
+            return ret;
+
+        if ((ist = get_input_stream(ost)))
+            dec = ist->dec_ctx;
+        if (dec && dec->subtitle_header) {
+            ost->enc_ctx->subtitle_header = av_malloc(dec->subtitle_header_size);
+            if (!ost->enc_ctx->subtitle_header)
+                return AVERROR(ENOMEM);
+            memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
+            ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
+        }
+        if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
+            av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
+
+        if (ost->filter && ost->filter->filter->inputs[0]->hw_frames_ctx &&
+            ((AVHWFramesContext*)ost->filter->filter->inputs[0]->hw_frames_ctx->data)->format ==
+            ost->filter->filter->inputs[0]->format) {
+            ost->enc_ctx->hw_frames_ctx = av_buffer_ref(ost->filter->filter->inputs[0]->hw_frames_ctx);
+            if (!ost->enc_ctx->hw_frames_ctx)
+                return AVERROR(ENOMEM);
+        }
+
+        if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
+            if (ret == AVERROR_EXPERIMENTAL)
+                abort_codec_experimental(codec, 1);
+            snprintf(error, error_len,
+                     "Error while opening encoder for output stream #%d:%d - "
+                     "maybe incorrect parameters such as bit_rate, rate, width or height",
+                    ost->file_index, ost->index);
+            return ret;
+        }
+        assert_avoptions(ost->encoder_opts);
+        if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
+            av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
+                                         "It takes bits/s as argument, not kbits/s\n");
+
+        ret = avcodec_parameters_from_context(ost->st->codecpar, ost->enc_ctx);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_FATAL,
+                   "Error initializing the output stream codec context.\n");
+            exit_program(1);
+        }
+
+        if (ost->enc_ctx->nb_coded_side_data) {
+            int i;
+
+            ost->st->side_data = av_realloc_array(NULL, ost->enc_ctx->nb_coded_side_data,
+                                                  sizeof(*ost->st->side_data));
+            if (!ost->st->side_data)
+                return AVERROR(ENOMEM);
+
+            for (i = 0; i < ost->enc_ctx->nb_coded_side_data; i++) {
+                const AVPacketSideData *sd_src = &ost->enc_ctx->coded_side_data[i];
+                AVPacketSideData *sd_dst = &ost->st->side_data[i];
+
+                sd_dst->data = av_malloc(sd_src->size);
+                if (!sd_dst->data)
+                    return AVERROR(ENOMEM);
+                memcpy(sd_dst->data, sd_src->data, sd_src->size);
+                sd_dst->size = sd_src->size;
+                sd_dst->type = sd_src->type;
+                ost->st->nb_side_data++;
+            }
+        }
+
+        ost->st->time_base = ost->enc_ctx->time_base;
+    } else if (ost->stream_copy) {
+        ret = init_output_stream_streamcopy(ost);
+        if (ret < 0)
+            return ret;
+
+        /*
+         * FIXME: will the codec context used by the parser during streamcopy
+         * This should go away with the new parser API.
+         */
+        ret = avcodec_parameters_to_context(ost->parser_avctx, ost->st->codecpar);
+        if (ret < 0)
+            return ret;
+    }
+
+    /* initialize bitstream filters for the output stream
+     * needs to be done here, because the codec id for streamcopy is not
+     * known until now */
+    ret = init_output_bsfs(ost);
+    if (ret < 0)
+        return ret;
+
+    ost->mux_timebase = ost->st->time_base;
+
+    ost->initialized = 1;
+
+    ret = check_init_output_file(output_files[ost->file_index], ost->file_index);
+    if (ret < 0)
+        return ret;
+
+    return ret;
+}
+
+static int transcode_init(void)
+{
+    int ret = 0, i, j, k;
+    OutputStream *ost;
+    InputStream *ist;
+    char error[1024];
+
+    /* init framerate emulation */
+    for (i = 0; i < nb_input_files; i++) {
+        InputFile *ifile = input_files[i];
+        if (ifile->rate_emu)
+            for (j = 0; j < ifile->nb_streams; j++)
+                input_streams[j + ifile->ist_index]->start = av_gettime_relative();
+    }
+
+    /* init input streams */
+    for (i = 0; i < nb_input_streams; i++)
+        if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
+            goto dump_format;
+
+    /* open each encoder */
+    for (i = 0; i < nb_output_streams; i++) {
+        // skip streams fed from filtergraphs until we have a frame for them
+        if (output_streams[i]->filter)
+            continue;
+
+        ret = init_output_stream(output_streams[i], error, sizeof(error));
+        if (ret < 0)
+            goto dump_format;
+    }
+
+
+    /* discard unused programs */
+    for (i = 0; i < nb_input_files; i++) {
+        InputFile *ifile = input_files[i];
+        for (j = 0; j < ifile->ctx->nb_programs; j++) {
+            AVProgram *p = ifile->ctx->programs[j];
+            int discard  = AVDISCARD_ALL;
+
+            for (k = 0; k < p->nb_stream_indexes; k++)
+                if (!input_streams[ifile->ist_index + p->stream_index[k]]->discard) {
+                    discard = AVDISCARD_DEFAULT;
+                    break;
+                }
+            p->discard = discard;
+        }
+    }
+
+ dump_format:
+    /* dump the stream mapping */
+    av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
+    for (i = 0; i < nb_input_streams; i++) {
+        ist = input_streams[i];
+
+        for (j = 0; j < ist->nb_filters; j++) {
+            if (!filtergraph_is_simple(ist->filters[j]->graph)) {
+                av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
+                       ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
+                       ist->filters[j]->name);
+                if (nb_filtergraphs > 1)
+                    av_log(NULL, AV_LOG_INFO, " (graph %d)", ist->filters[j]->graph->index);
+                av_log(NULL, AV_LOG_INFO, "\n");
+            }
+        }
+    }
+
+    for (i = 0; i < nb_output_streams; i++) {
+        ost = output_streams[i];
+
+        if (ost->attachment_filename) {
+            /* an attached file */
+            av_log(NULL, AV_LOG_INFO, "  File %s -> Stream #%d:%d\n",
+                   ost->attachment_filename, ost->file_index, ost->index);
+            continue;
+        }
+
+        if (ost->filter && !filtergraph_is_simple(ost->filter->graph)) {
+            /* output from a complex graph */
+            av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
+            if (nb_filtergraphs > 1)
+                av_log(NULL, AV_LOG_INFO, " (graph %d)", ost->filter->graph->index);
+
+            av_log(NULL, AV_LOG_INFO, " -> Stream #%d:%d (%s)\n", ost->file_index,
+                   ost->index, ost->enc ? ost->enc->name : "?");
+            continue;
+        }
+
+        av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d -> #%d:%d",
+               input_streams[ost->source_index]->file_index,
+               input_streams[ost->source_index]->st->index,
+               ost->file_index,
+               ost->index);
+        if (ost->sync_ist != input_streams[ost->source_index])
+            av_log(NULL, AV_LOG_INFO, " [sync #%d:%d]",
+                   ost->sync_ist->file_index,
+                   ost->sync_ist->st->index);
+        if (ost->stream_copy)
+            av_log(NULL, AV_LOG_INFO, " (copy)");
+        else {
+            const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
+            const AVCodec *out_codec   = ost->enc;
+            const char *decoder_name   = "?";
+            const char *in_codec_name  = "?";
+            const char *encoder_name   = "?";
+            const char *out_codec_name = "?";
+            const AVCodecDescriptor *desc;
+
+            if (in_codec) {
+                decoder_name  = in_codec->name;
+                desc = avcodec_descriptor_get(in_codec->id);
+                if (desc)
+                    in_codec_name = desc->name;
+                if (!strcmp(decoder_name, in_codec_name))
+                    decoder_name = "native";
+            }
+
+            if (out_codec) {
+                encoder_name   = out_codec->name;
+                desc = avcodec_descriptor_get(out_codec->id);
+                if (desc)
+                    out_codec_name = desc->name;
+                if (!strcmp(encoder_name, out_codec_name))
+                    encoder_name = "native";
+            }
+
+            av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
+                   in_codec_name, decoder_name,
+                   out_codec_name, encoder_name);
+        }
+        av_log(NULL, AV_LOG_INFO, "\n");
+    }
+
+    if (ret) {
+        av_log(NULL, AV_LOG_ERROR, "%s\n", error);
+        return ret;
+    }
+
+    return 0;
+}
+
+/* Return 1 if there remain streams where more output is wanted, 0 otherwise. */
+static int need_output(void)
+{
+    int i;
+
+    for (i = 0; i < nb_output_streams; i++) {
+        OutputStream *ost    = output_streams[i];
+        OutputFile *of       = output_files[ost->file_index];
+        AVFormatContext *os  = output_files[ost->file_index]->ctx;
+
+        if (ost->finished ||
+            (os->pb && avio_tell(os->pb) >= of->limit_filesize))
+            continue;
+        if (ost->frame_number >= ost->max_frames) {
+            int j;
+            for (j = 0; j < of->ctx->nb_streams; j++)
+                output_streams[of->ost_index + j]->finished = 1;
+            continue;
+        }
+
+        return 1;
+    }
+
+    return 0;
+}
+
+static InputFile *select_input_file(void)
+{
+    InputFile *ifile = NULL;
+    int64_t ipts_min = INT64_MAX;
+    int i;
+
+    for (i = 0; i < nb_input_streams; i++) {
+        InputStream *ist = input_streams[i];
+        int64_t ipts     = ist->last_dts;
+
+        if (ist->discard || input_files[ist->file_index]->eagain)
+            continue;
+        if (!input_files[ist->file_index]->eof_reached) {
+            if (ipts < ipts_min) {
+                ipts_min = ipts;
+                ifile    = input_files[ist->file_index];
+            }
+        }
+    }
+
+    return ifile;
+}
+
+#if HAVE_PTHREADS
+static void *input_thread(void *arg)
+{
+    InputFile *f = arg;
+    int ret = 0;
+
+    while (!transcoding_finished && ret >= 0) {
+        AVPacket pkt;
+        ret = av_read_frame(f->ctx, &pkt);
+
+        if (ret == AVERROR(EAGAIN)) {
+            av_usleep(10000);
+            ret = 0;
+            continue;
+        } else if (ret < 0)
+            break;
+
+        pthread_mutex_lock(&f->fifo_lock);
+        while (!av_fifo_space(f->fifo))
+            pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
+
+        av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
+
+        pthread_mutex_unlock(&f->fifo_lock);
+    }
+
+    f->finished = 1;
+    return NULL;
+}
+
+static void free_input_threads(void)
+{
+    int i;
+
+    if (nb_input_files == 1)
+        return;
+
+    transcoding_finished = 1;
+
+    for (i = 0; i < nb_input_files; i++) {
+        InputFile *f = input_files[i];
+        AVPacket pkt;
+
+        if (!f->fifo || f->joined)
+            continue;
+
+        pthread_mutex_lock(&f->fifo_lock);
+        while (av_fifo_size(f->fifo)) {
+            av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
+            av_packet_unref(&pkt);
+        }
+        pthread_cond_signal(&f->fifo_cond);
+        pthread_mutex_unlock(&f->fifo_lock);
+
+        pthread_join(f->thread, NULL);
+        f->joined = 1;
+
+        while (av_fifo_size(f->fifo)) {
+            av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
+            av_packet_unref(&pkt);
+        }
+        av_fifo_free(f->fifo);
+    }
+}
+
+static int init_input_threads(void)
+{
+    int i, ret;
+
+    if (nb_input_files == 1)
+        return 0;
+
+    for (i = 0; i < nb_input_files; i++) {
+        InputFile *f = input_files[i];
+
+        if (!(f->fifo = av_fifo_alloc(8*sizeof(AVPacket))))
+            return AVERROR(ENOMEM);
+
+        pthread_mutex_init(&f->fifo_lock, NULL);
+        pthread_cond_init (&f->fifo_cond, NULL);
+
+        if ((ret = pthread_create(&f->thread, NULL, input_thread, f)))
+            return AVERROR(ret);
+    }
+    return 0;
+}
+
+static int get_input_packet_mt(InputFile *f, AVPacket *pkt)
+{
+    int ret = 0;
+
+    pthread_mutex_lock(&f->fifo_lock);
+
+    if (av_fifo_size(f->fifo)) {
+        av_fifo_generic_read(f->fifo, pkt, sizeof(*pkt), NULL);
+        pthread_cond_signal(&f->fifo_cond);
+    } else {
+        if (f->finished)
+            ret = AVERROR_EOF;
+        else
+            ret = AVERROR(EAGAIN);
+    }
+
+    pthread_mutex_unlock(&f->fifo_lock);
+
+    return ret;
+}
+#endif
+
+static int get_input_packet(InputFile *f, AVPacket *pkt)
+{
+    if (f->rate_emu) {
+        int i;
+        for (i = 0; i < f->nb_streams; i++) {
+            InputStream *ist = input_streams[f->ist_index + i];
+            int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
+            int64_t now = av_gettime_relative() - ist->start;
+            if (pts > now)
+                return AVERROR(EAGAIN);
+        }
+    }
+
+#if HAVE_PTHREADS
+    if (nb_input_files > 1)
+        return get_input_packet_mt(f, pkt);
+#endif
+    return av_read_frame(f->ctx, pkt);
+}
+
+static int got_eagain(void)
+{
+    int i;
+    for (i = 0; i < nb_input_files; i++)
+        if (input_files[i]->eagain)
+            return 1;
+    return 0;
+}
+
+static void reset_eagain(void)
+{
+    int i;
+    for (i = 0; i < nb_input_files; i++)
+        input_files[i]->eagain = 0;
+}
+
+// set duration to max(tmp, duration) in a proper time base and return duration's time_base
+static AVRational duration_max(int64_t tmp, int64_t *duration, AVRational tmp_time_base,
+                                AVRational time_base)
+{
+    int ret;
+
+    if (!*duration) {
+        *duration = tmp;
+        return tmp_time_base;
+    }
+
+    ret = av_compare_ts(*duration, time_base, tmp, tmp_time_base);
+    if (ret < 0) {
+        *duration = tmp;
+        return tmp_time_base;
+    }
+
+    return time_base;
+}
+
+static int seek_to_start(InputFile *ifile, AVFormatContext *is)
+{
+    InputStream *ist;
+    AVCodecContext *avctx;
+    int i, ret, has_audio = 0;
+    int64_t duration = 0;
+
+    ret = av_seek_frame(is, -1, is->start_time, 0);
+    if (ret < 0)
+        return ret;
+
+    for (i = 0; i < ifile->nb_streams; i++) {
+        ist   = input_streams[ifile->ist_index + i];
+        avctx = ist->dec_ctx;
+
+        // flush decoders
+        if (ist->decoding_needed) {
+            process_input_packet(ist, NULL, 1);
+            avcodec_flush_buffers(avctx);
+        }
+
+        /* duration is the length of the last frame in a stream
+         * when audio stream is present we don't care about
+         * last video frame length because it's not defined exactly */
+        if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && ist->nb_samples)
+            has_audio = 1;
+    }
+
+    for (i = 0; i < ifile->nb_streams; i++) {
+        ist   = input_streams[ifile->ist_index + i];
+        avctx = ist->dec_ctx;
+
+        if (has_audio) {
+            if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && ist->nb_samples) {
+                AVRational sample_rate = {1, avctx->sample_rate};
+
+                duration = av_rescale_q(ist->nb_samples, sample_rate, ist->st->time_base);
+            } else
+                continue;
+        } else {
+            if (ist->framerate.num) {
+                duration = av_rescale_q(1, ist->framerate, ist->st->time_base);
+            } else if (ist->st->avg_frame_rate.num) {
+                duration = av_rescale_q(1, ist->st->avg_frame_rate, ist->st->time_base);
+            } else duration = 1;
+        }
+        if (!ifile->duration)
+            ifile->time_base = ist->st->time_base;
+        /* the total duration of the stream, max_pts - min_pts is
+         * the duration of the stream without the last frame */
+        duration += ist->max_pts - ist->min_pts;
+        ifile->time_base = duration_max(duration, &ifile->duration, ist->st->time_base,
+                                        ifile->time_base);
+    }
+
+    if (ifile->loop > 0)
+        ifile->loop--;
+
+    return ret;
+}
+
+/*
+ * Read one packet from an input file and send it for
+ * - decoding -> lavfi (audio/video)
+ * - decoding -> encoding -> muxing (subtitles)
+ * - muxing (streamcopy)
+ *
+ * Return
+ * - 0 -- one packet was read and processed
+ * - AVERROR(EAGAIN) -- no packets were available for selected file,
+ *   this function should be called again
+ * - AVERROR_EOF -- this function should not be called again
+ */
+static int process_input(void)
+{
+    InputFile *ifile;
+    AVFormatContext *is;
+    InputStream *ist;
+    AVPacket pkt;
+    int ret, i, j;
+    int64_t duration;
+
+    /* select the stream that we must read now */
+    ifile = select_input_file();
+    /* if none, if is finished */
+    if (!ifile) {
+        if (got_eagain()) {
+            reset_eagain();
+            av_usleep(10000);
+            return AVERROR(EAGAIN);
+        }
+        av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from.\n");
+        return AVERROR_EOF;
+    }
+
+    is  = ifile->ctx;
+    ret = get_input_packet(ifile, &pkt);
+
+    if (ret == AVERROR(EAGAIN)) {
+        ifile->eagain = 1;
+        return ret;
+    }
+    if (ret < 0 && ifile->loop) {
+        if ((ret = seek_to_start(ifile, is)) < 0)
+            return ret;
+        ret = get_input_packet(ifile, &pkt);
+    }
+    if (ret < 0) {
+        if (ret != AVERROR_EOF) {
+            print_error(is->filename, ret);
+            if (exit_on_error)
+                exit_program(1);
+        }
+        ifile->eof_reached = 1;
+
+        for (i = 0; i < ifile->nb_streams; i++) {
+            ist = input_streams[ifile->ist_index + i];
+            if (ist->decoding_needed)
+                process_input_packet(ist, NULL, 0);
+
+            /* mark all outputs that don't go through lavfi as finished */
+            for (j = 0; j < nb_output_streams; j++) {
+                OutputStream *ost = output_streams[j];
+
+                if (ost->source_index == ifile->ist_index + i &&
+                    (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
+                    finish_output_stream(ost);
+            }
+        }
+
+        return AVERROR(EAGAIN);
+    }
+
+    reset_eagain();
+
+    if (do_pkt_dump) {
+        av_pkt_dump_log2(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump,
+                         is->streams[pkt.stream_index]);
+    }
+    /* the following test is needed in case new streams appear
+       dynamically in stream : we ignore them */
+    if (pkt.stream_index >= ifile->nb_streams)
+        goto discard_packet;
+
+    ist = input_streams[ifile->ist_index + pkt.stream_index];
+
+    ist->data_size += pkt.size;
+    ist->nb_packets++;
+
+    if (ist->discard)
+        goto discard_packet;
+
+    /* add the stream-global side data to the first packet */
+    if (ist->nb_packets == 1)
+        for (i = 0; i < ist->st->nb_side_data; i++) {
+            AVPacketSideData *src_sd = &ist->st->side_data[i];
+            uint8_t *dst_data;
+
+            if (av_packet_get_side_data(&pkt, src_sd->type, NULL))
+                continue;
+            if (ist->autorotate && src_sd->type == AV_PKT_DATA_DISPLAYMATRIX)
+                continue;
+
+            dst_data = av_packet_new_side_data(&pkt, src_sd->type, src_sd->size);
+            if (!dst_data)
+                exit_program(1);
+
+            memcpy(dst_data, src_sd->data, src_sd->size);
+        }
+
+    if (pkt.dts != AV_NOPTS_VALUE)
+        pkt.dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
+    if (pkt.pts != AV_NOPTS_VALUE)
+        pkt.pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, ist->st->time_base);
+
+    if (pkt.pts != AV_NOPTS_VALUE)
+        pkt.pts *= ist->ts_scale;
+    if (pkt.dts != AV_NOPTS_VALUE)
+        pkt.dts *= ist->ts_scale;
+
+    if ((ist->dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
+         ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) &&
+        pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
+        (is->iformat->flags & AVFMT_TS_DISCONT)) {
+        int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
+        int64_t delta   = pkt_dts - ist->next_dts;
+
+        if ((FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE || pkt_dts + 1 < ist->last_dts) && !copy_ts) {
+            ifile->ts_offset -= delta;
+            av_log(NULL, AV_LOG_DEBUG,
+                   "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
+                   delta, ifile->ts_offset);
+            pkt.dts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
+            if (pkt.pts != AV_NOPTS_VALUE)
+                pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
+        }
+    }
+    duration = av_rescale_q(ifile->duration, ifile->time_base, ist->st->time_base);
+    if (pkt.pts != AV_NOPTS_VALUE) {
+        pkt.pts += duration;
+        ist->max_pts = FFMAX(pkt.pts, ist->max_pts);
+        ist->min_pts = FFMIN(pkt.pts, ist->min_pts);
+    }
+
+    if (pkt.dts != AV_NOPTS_VALUE)
+        pkt.dts += duration;
+
+    process_input_packet(ist, &pkt, 0);
+
+discard_packet:
+    av_packet_unref(&pkt);
+
+    return 0;
+}
+
+/*
+ * The following code is the main loop of the file converter
+ */
+static int transcode(void)
+{
+    int ret, i, need_input = 1;
+    AVFormatContext *os;
+    OutputStream *ost;
+    InputStream *ist;
+    int64_t timer_start;
+
+    ret = transcode_init();
+    if (ret < 0)
+        goto fail;
+
+    av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
+    term_init();
+
+    timer_start = av_gettime_relative();
+
+#if HAVE_PTHREADS
+    if ((ret = init_input_threads()) < 0)
+        goto fail;
+#endif
+
+    while (!received_sigterm) {
+        /* check if there's any stream where output is still needed */
+        if (!need_output()) {
+            av_log(NULL, AV_LOG_VERBOSE, "No more output streams to write to, finishing.\n");
+            break;
+        }
+
+        /* read and process one input packet if needed */
+        if (need_input) {
+            ret = process_input();
+            if (ret == AVERROR_EOF)
+                need_input = 0;
+        }
+
+        ret = poll_filters();
+        if (ret < 0 && ret != AVERROR_EOF) {
+            char errbuf[128];
+            av_strerror(ret, errbuf, sizeof(errbuf));
+
+            av_log(NULL, AV_LOG_ERROR, "Error while filtering: %s\n", errbuf);
+            break;
+        }
+
+        /* dump report by using the output first video and audio streams */
+        print_report(0, timer_start);
+    }
+#if HAVE_PTHREADS
+    free_input_threads();
+#endif
+
+    /* at the end of stream, we must flush the decoder buffers */
+    for (i = 0; i < nb_input_streams; i++) {
+        ist = input_streams[i];
+        if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
+            process_input_packet(ist, NULL, 0);
+        }
+    }
+    poll_filters();
+    flush_encoders();
+
+    term_exit();
+
+    /* write the trailer if needed and close file */
+    for (i = 0; i < nb_output_files; i++) {
+        os = output_files[i]->ctx;
+        if (!output_files[i]->header_written) {
+            av_log(NULL, AV_LOG_ERROR,
+                   "Nothing was written into output file %d (%s), because "
+                   "at least one of its streams received no packets.\n",
+                   i, os->filename);
+            continue;
+        }
+        av_write_trailer(os);
+    }
+
+    /* dump report by using the first video and audio streams */
+    print_report(1, timer_start);
+
+    /* close each encoder */
+    for (i = 0; i < nb_output_streams; i++) {
+        ost = output_streams[i];
+        if (ost->encoding_needed) {
+            av_freep(&ost->enc_ctx->stats_in);
+        }
+    }
+
+    /* close each decoder */
+    for (i = 0; i < nb_input_streams; i++) {
+        ist = input_streams[i];
+        if (ist->decoding_needed) {
+            avcodec_close(ist->dec_ctx);
+            if (ist->hwaccel_uninit)
+                ist->hwaccel_uninit(ist->dec_ctx);
+        }
+    }
+
+    av_buffer_unref(&hw_device_ctx);
+
+    /* finished ! */
+    ret = 0;
+
+ fail:
+#if HAVE_PTHREADS
+    free_input_threads();
+#endif
+
+    if (output_streams) {
+        for (i = 0; i < nb_output_streams; i++) {
+            ost = output_streams[i];
+            if (ost) {
+                if (ost->logfile) {
+                    fclose(ost->logfile);
+                    ost->logfile = NULL;
+                }
+                av_free(ost->forced_kf_pts);
+                av_dict_free(&ost->encoder_opts);
+                av_dict_free(&ost->resample_opts);
+            }
+        }
+    }
+    return ret;
+}
+
+static int64_t getutime(void)
+{
+#if HAVE_GETRUSAGE
+    struct rusage rusage;
+
+    getrusage(RUSAGE_SELF, &rusage);
+    return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
+#elif HAVE_GETPROCESSTIMES
+    HANDLE proc;
+    FILETIME c, e, k, u;
+    proc = GetCurrentProcess();
+    GetProcessTimes(proc, &c, &e, &k, &u);
+    return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
+#else
+    return av_gettime_relative();
+#endif
+}
+
+static int64_t getmaxrss(void)
+{
+#if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
+    struct rusage rusage;
+    getrusage(RUSAGE_SELF, &rusage);
+    return (int64_t)rusage.ru_maxrss * 1024;
+#elif HAVE_GETPROCESSMEMORYINFO
+    HANDLE proc;
+    PROCESS_MEMORY_COUNTERS memcounters;
+    proc = GetCurrentProcess();
+    memcounters.cb = sizeof(memcounters);
+    GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
+    return memcounters.PeakPagefileUsage;
+#else
+    return 0;
+#endif
+}
+
+int main(int argc, char **argv)
+{
+    int i, ret;
+    int64_t ti;
+
+    register_exit(avconv_cleanup);
+
+    av_log_set_flags(AV_LOG_SKIP_REPEATED);
+    parse_loglevel(argc, argv, options);
+
+    avcodec_register_all();
+#if CONFIG_AVDEVICE
+    avdevice_register_all();
+#endif
+    avfilter_register_all();
+    av_register_all();
+    avformat_network_init();
+
+    show_banner();
+
+    /* parse options and open all input/output files */
+    ret = avconv_parse_options(argc, argv);
+    if (ret < 0)
+        exit_program(1);
+
+    if (nb_output_files <= 0 && nb_input_files == 0) {
+        show_usage();
+        av_log(NULL, AV_LOG_WARNING, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
+        exit_program(1);
+    }
+
+    /* file converter / grab */
+    if (nb_output_files <= 0) {
+        fprintf(stderr, "At least one output file must be specified\n");
+        exit_program(1);
+    }
+
+    for (i = 0; i < nb_output_files; i++) {
+        if (strcmp(output_files[i]->ctx->oformat->name, "rtp"))
+            want_sdp = 0;
+    }
+
+    ti = getutime();
+    if (transcode() < 0)
+        exit_program(1);
+    ti = getutime() - ti;
+    if (do_benchmark) {
+        int maxrss = getmaxrss() / 1024;
+        printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
+    }
+
+    exit_program(0);
+    return 0;
+}
diff --git a/avtools/avconv.h b/avtools/avconv.h
new file mode 100644
index 0000000000..3c3f0ef659
--- /dev/null
+++ b/avtools/avconv.h
@@ -0,0 +1,513 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCONV_H
+#define AVCONV_H
+
+#include "config.h"
+
+#include <stdint.h>
+#include <stdio.h>
+
+#if HAVE_PTHREADS
+#include <pthread.h>
+#endif
+
+#include "cmdutils.h"
+
+#include "libavformat/avformat.h"
+#include "libavformat/avio.h"
+
+#include "libavcodec/avcodec.h"
+
+#include "libavfilter/avfilter.h"
+
+#include "libavutil/avutil.h"
+#include "libavutil/dict.h"
+#include "libavutil/fifo.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/rational.h"
+
+#define VSYNC_AUTO       -1
+#define VSYNC_PASSTHROUGH 0
+#define VSYNC_CFR         1
+#define VSYNC_VFR         2
+
+enum HWAccelID {
+    HWACCEL_NONE = 0,
+    HWACCEL_AUTO,
+    HWACCEL_VDPAU,
+    HWACCEL_DXVA2,
+    HWACCEL_VDA,
+    HWACCEL_QSV,
+    HWACCEL_VAAPI,
+};
+
+typedef struct HWAccel {
+    const char *name;
+    int (*init)(AVCodecContext *s);
+    enum HWAccelID id;
+    enum AVPixelFormat pix_fmt;
+} HWAccel;
+
+/* select an input stream for an output stream */
+typedef struct StreamMap {
+    int disabled;           /* 1 is this mapping is disabled by a negative map */
+    int file_index;
+    int stream_index;
+    int sync_file_index;
+    int sync_stream_index;
+    char *linklabel;       /* name of an output link, for mapping lavfi outputs */
+} StreamMap;
+
+/* select an input file for an output file */
+typedef struct MetadataMap {
+    int  file;      // file index
+    char type;      // type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
+    int  index;     // stream/chapter/program number
+} MetadataMap;
+
+typedef struct OptionsContext {
+    OptionGroup *g;
+
+    /* input/output options */
+    int64_t start_time;
+    const char *format;
+
+    SpecifierOpt *codec_names;
+    int        nb_codec_names;
+    SpecifierOpt *audio_channels;
+    int        nb_audio_channels;
+    SpecifierOpt *audio_sample_rate;
+    int        nb_audio_sample_rate;
+    SpecifierOpt *frame_rates;
+    int        nb_frame_rates;
+    SpecifierOpt *frame_sizes;
+    int        nb_frame_sizes;
+    SpecifierOpt *frame_pix_fmts;
+    int        nb_frame_pix_fmts;
+
+    /* input options */
+    int64_t input_ts_offset;
+    int loop;
+    int rate_emu;
+    int accurate_seek;
+
+    SpecifierOpt *ts_scale;
+    int        nb_ts_scale;
+    SpecifierOpt *dump_attachment;
+    int        nb_dump_attachment;
+    SpecifierOpt *hwaccels;
+    int        nb_hwaccels;
+    SpecifierOpt *hwaccel_devices;
+    int        nb_hwaccel_devices;
+    SpecifierOpt *hwaccel_output_formats;
+    int        nb_hwaccel_output_formats;
+    SpecifierOpt *autorotate;
+    int        nb_autorotate;
+
+    /* output options */
+    StreamMap *stream_maps;
+    int     nb_stream_maps;
+    /* first item specifies output metadata, second is input */
+    MetadataMap (*meta_data_maps)[2];
+    int nb_meta_data_maps;
+    int metadata_global_manual;
+    int metadata_streams_manual;
+    int metadata_chapters_manual;
+    const char **attachments;
+    int       nb_attachments;
+
+    int chapters_input_file;
+
+    int64_t recording_time;
+    uint64_t limit_filesize;
+    float mux_preload;
+    float mux_max_delay;
+    int shortest;
+
+    int video_disable;
+    int audio_disable;
+    int subtitle_disable;
+    int data_disable;
+
+    /* indexed by output file stream index */
+    int   *streamid_map;
+    int nb_streamid_map;
+
+    SpecifierOpt *metadata;
+    int        nb_metadata;
+    SpecifierOpt *max_frames;
+    int        nb_max_frames;
+    SpecifierOpt *bitstream_filters;
+    int        nb_bitstream_filters;
+    SpecifierOpt *codec_tags;
+    int        nb_codec_tags;
+    SpecifierOpt *sample_fmts;
+    int        nb_sample_fmts;
+    SpecifierOpt *qscale;
+    int        nb_qscale;
+    SpecifierOpt *bitrates;
+    int        nb_bitrates;
+    SpecifierOpt *forced_key_frames;
+    int        nb_forced_key_frames;
+    SpecifierOpt *force_fps;
+    int        nb_force_fps;
+    SpecifierOpt *frame_aspect_ratios;
+    int        nb_frame_aspect_ratios;
+    SpecifierOpt *rc_overrides;
+    int        nb_rc_overrides;
+    SpecifierOpt *intra_matrices;
+    int        nb_intra_matrices;
+    SpecifierOpt *inter_matrices;
+    int        nb_inter_matrices;
+    SpecifierOpt *top_field_first;
+    int        nb_top_field_first;
+    SpecifierOpt *metadata_map;
+    int        nb_metadata_map;
+    SpecifierOpt *presets;
+    int        nb_presets;
+    SpecifierOpt *copy_initial_nonkeyframes;
+    int        nb_copy_initial_nonkeyframes;
+    SpecifierOpt *filters;
+    int        nb_filters;
+    SpecifierOpt *filter_scripts;
+    int        nb_filter_scripts;
+    SpecifierOpt *pass;
+    int        nb_pass;
+    SpecifierOpt *passlogfiles;
+    int        nb_passlogfiles;
+    SpecifierOpt *max_muxing_queue_size;
+    int        nb_max_muxing_queue_size;
+} OptionsContext;
+
+typedef struct InputFilter {
+    AVFilterContext    *filter;
+    struct InputStream *ist;
+    struct FilterGraph *graph;
+    uint8_t            *name;
+
+    AVFifoBuffer *frame_queue;
+
+    // parameters configured for this input
+    int format;
+
+    int width, height;
+    AVRational sample_aspect_ratio;
+
+    int sample_rate;
+    uint64_t channel_layout;
+
+    AVBufferRef *hw_frames_ctx;
+
+    int eof;
+} InputFilter;
+
+typedef struct OutputFilter {
+    AVFilterContext     *filter;
+    struct OutputStream *ost;
+    struct FilterGraph  *graph;
+    uint8_t             *name;
+
+    /* temporary storage until stream maps are processed */
+    AVFilterInOut       *out_tmp;
+    enum AVMediaType     type;
+
+    /* desired output stream properties */
+    int width, height;
+    AVRational frame_rate;
+    int format;
+    int sample_rate;
+    uint64_t channel_layout;
+
+    // those are only set if no format is specified and the encoder gives us multiple options
+    int *formats;
+    uint64_t *channel_layouts;
+    int *sample_rates;
+} OutputFilter;
+
+typedef struct FilterGraph {
+    int            index;
+    const char    *graph_desc;
+
+    AVFilterGraph *graph;
+
+    InputFilter   **inputs;
+    int          nb_inputs;
+    OutputFilter **outputs;
+    int         nb_outputs;
+} FilterGraph;
+
+typedef struct InputStream {
+    int file_index;
+    AVStream *st;
+    int discard;             /* true if stream data should be discarded */
+    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
+    AVCodecContext *dec_ctx;
+    AVCodec *dec;
+    AVFrame *decoded_frame;
+    AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
+
+    int64_t       start;     /* time when read started */
+    /* predicted dts of the next packet read for this stream or (when there are
+     * several frames in a packet) of the next frame in current packet */
+    int64_t       next_dts;
+    /* dts of the last packet read for this stream */
+    int64_t       last_dts;
+    int64_t min_pts; /* pts with the smallest value in a current stream */
+    int64_t max_pts; /* pts with the higher value in a current stream */
+
+    // when forcing constant input framerate through -r,
+    // this contains the pts that will be given to the next decoded frame
+    int64_t cfr_next_pts;
+
+    int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
+    PtsCorrectionContext pts_ctx;
+    double ts_scale;
+    AVDictionary *decoder_opts;
+    AVRational framerate;               /* framerate forced with -r */
+
+    int autorotate;
+
+    /* decoded data from this stream goes into all those filters
+     * currently video and audio only */
+    InputFilter **filters;
+    int        nb_filters;
+
+    /* hwaccel options */
+    enum HWAccelID hwaccel_id;
+    char  *hwaccel_device;
+    enum AVPixelFormat hwaccel_output_format;
+
+    /* hwaccel context */
+    enum HWAccelID active_hwaccel_id;
+    void  *hwaccel_ctx;
+    void (*hwaccel_uninit)(AVCodecContext *s);
+    int  (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
+    int  (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
+    enum AVPixelFormat hwaccel_pix_fmt;
+    enum AVPixelFormat hwaccel_retrieved_pix_fmt;
+    AVBufferRef *hw_frames_ctx;
+
+    /* stats */
+    // combined size of all the packets read
+    uint64_t data_size;
+    /* number of packets successfully read for this stream */
+    uint64_t nb_packets;
+    // number of frames/samples retrieved from the decoder
+    uint64_t frames_decoded;
+    uint64_t samples_decoded;
+} InputStream;
+
+typedef struct InputFile {
+    AVFormatContext *ctx;
+    int eof_reached;      /* true if eof reached */
+    int eagain;           /* true if last read attempt returned EAGAIN */
+    int ist_index;        /* index of first stream in ist_table */
+    int loop;             /* set number of times input stream should be looped */
+    int64_t duration;     /* actual duration of the longest stream in a file
+                             at the moment when looping happens */
+    AVRational time_base; /* time base of the duration */
+    int64_t ts_offset;
+    int64_t start_time;   /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
+    int64_t recording_time;
+    int nb_streams;       /* number of stream that avconv is aware of; may be different
+                             from ctx.nb_streams if new streams appear during av_read_frame() */
+    int rate_emu;
+    int accurate_seek;
+
+#if HAVE_PTHREADS
+    pthread_t thread;           /* thread reading from this file */
+    int finished;               /* the thread has exited */
+    int joined;                 /* the thread has been joined */
+    pthread_mutex_t fifo_lock;  /* lock for access to fifo */
+    pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
+    AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
+#endif
+} InputFile;
+
+typedef struct OutputStream {
+    int file_index;          /* file index */
+    int index;               /* stream index in the output file */
+    int source_index;        /* InputStream index */
+    AVStream *st;            /* stream in the output file */
+    int encoding_needed;     /* true if encoding needed for this stream */
+    int frame_number;
+    /* input pts and corresponding output pts
+       for A/V sync */
+    // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
+    struct InputStream *sync_ist; /* input stream to sync against */
+    int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
+    /* pts of the first frame encoded for this stream, used for limiting
+     * recording time */
+    int64_t first_pts;
+    /* dts of the last packet sent to the muxer */
+    int64_t last_mux_dts;
+    // the timebase of the packets sent to the muxer
+    AVRational mux_timebase;
+
+    int                    nb_bitstream_filters;
+    AVBSFContext            **bsf_ctx;
+
+    AVCodecContext *enc_ctx;
+    AVCodec *enc;
+    int64_t max_frames;
+    AVFrame *filtered_frame;
+
+    void  *hwaccel_ctx;
+
+    /* video only */
+    AVRational frame_rate;
+    int force_fps;
+    int top_field_first;
+
+    float frame_aspect_ratio;
+
+    /* forced key frames */
+    int64_t *forced_kf_pts;
+    int forced_kf_count;
+    int forced_kf_index;
+    char *forced_keyframes;
+
+    // the bitrate to send to the muxer for streamcopy
+    int bitrate_override;
+
+    char *logfile_prefix;
+    FILE *logfile;
+
+    OutputFilter *filter;
+    char *avfilter;
+
+    int64_t sws_flags;
+    AVDictionary *encoder_opts;
+    AVDictionary *resample_opts;
+    int finished;        /* no more packets should be written for this stream */
+    int stream_copy;
+
+    // init_output_stream() has been called for this stream
+    // The encoder and the bistream filters have been initialized and the stream
+    // parameters are set in the AVStream.
+    int initialized;
+
+    const char *attachment_filename;
+    int copy_initial_nonkeyframes;
+
+    enum AVPixelFormat pix_fmts[2];
+
+    AVCodecParserContext *parser;
+    AVCodecContext       *parser_avctx;
+
+    /* stats */
+    // combined size of all the packets written
+    uint64_t data_size;
+    // number of packets send to the muxer
+    uint64_t packets_written;
+    // number of frames/samples sent to the encoder
+    uint64_t frames_encoded;
+    uint64_t samples_encoded;
+
+    /* packet quality factor */
+    int quality;
+
+    int max_muxing_queue_size;
+
+    /* the packets are buffered here until the muxer is ready to be initialized */
+    AVFifoBuffer *muxing_queue;
+} OutputStream;
+
+typedef struct OutputFile {
+    AVFormatContext *ctx;
+    AVDictionary *opts;
+    int ost_index;       /* index of the first stream in output_streams */
+    int64_t recording_time; /* desired length of the resulting file in microseconds */
+    int64_t start_time;     /* start time in microseconds */
+    uint64_t limit_filesize;
+
+    int shortest;
+
+    int header_written;
+} OutputFile;
+
+extern InputStream **input_streams;
+extern int        nb_input_streams;
+extern InputFile   **input_files;
+extern int        nb_input_files;
+
+extern OutputStream **output_streams;
+extern int         nb_output_streams;
+extern OutputFile   **output_files;
+extern int         nb_output_files;
+
+extern FilterGraph **filtergraphs;
+extern int        nb_filtergraphs;
+
+extern char *vstats_filename;
+
+extern float audio_drift_threshold;
+extern float dts_delta_threshold;
+
+extern int audio_volume;
+extern int audio_sync_method;
+extern int video_sync_method;
+extern int do_benchmark;
+extern int do_deinterlace;
+extern int do_hex_dump;
+extern int do_pkt_dump;
+extern int copy_ts;
+extern int copy_tb;
+extern int exit_on_error;
+extern int print_stats;
+extern int qp_hist;
+
+extern const AVIOInterruptCB int_cb;
+
+extern const OptionDef options[];
+
+extern const HWAccel hwaccels[];
+extern int hwaccel_lax_profile_check;
+extern AVBufferRef *hw_device_ctx;
+
+void reset_options(OptionsContext *o);
+void show_usage(void);
+
+void opt_output_file(void *optctx, const char *filename);
+
+void assert_avoptions(AVDictionary *m);
+
+int guess_input_channel_layout(InputStream *ist);
+
+int configure_filtergraph(FilterGraph *fg);
+int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
+int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
+int filtergraph_is_simple(FilterGraph *fg);
+int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
+int init_complex_filtergraph(FilterGraph *fg);
+
+int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
+
+int avconv_parse_options(int argc, char **argv);
+
+int vdpau_init(AVCodecContext *s);
+int dxva2_init(AVCodecContext *s);
+int vda_init(AVCodecContext *s);
+int qsv_init(AVCodecContext *s);
+int qsv_transcode_init(OutputStream *ost);
+int vaapi_decode_init(AVCodecContext *avctx);
+int vaapi_device_init(const char *device);
+
+#endif /* AVCONV_H */
diff --git a/avtools/avconv_dxva2.c b/avtools/avconv_dxva2.c
new file mode 100644
index 0000000000..7578c3f632
--- /dev/null
+++ b/avtools/avconv_dxva2.c
@@ -0,0 +1,440 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <windows.h>
+
+#ifdef _WIN32_WINNT
+#undef _WIN32_WINNT
+#endif
+#define _WIN32_WINNT 0x0600
+#define DXVA2API_USE_BITFIELDS
+#define COBJMACROS
+
+#include <stdint.h>
+
+#include <d3d9.h>
+#include <dxva2api.h>
+
+#include "avconv.h"
+
+#include "libavcodec/dxva2.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/buffer.h"
+#include "libavutil/frame.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/pixfmt.h"
+
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_dxva2.h"
+
+/* define all the GUIDs used directly here,
+   to avoid problems with inconsistent dxva2api.h versions in mingw-w64 and different MSVC version */
+#include <initguid.h>
+DEFINE_GUID(IID_IDirectXVideoDecoderService, 0xfc51a551,0xd5e7,0x11d9,0xaf,0x55,0x00,0x05,0x4e,0x43,0xff,0x02);
+
+DEFINE_GUID(DXVA2_ModeMPEG2_VLD,      0xee27417f, 0x5e28,0x4e65,0xbe,0xea,0x1d,0x26,0xb5,0x08,0xad,0xc9);
+DEFINE_GUID(DXVA2_ModeMPEG2and1_VLD,  0x86695f12, 0x340e,0x4f04,0x9f,0xd3,0x92,0x53,0xdd,0x32,0x74,0x60);
+DEFINE_GUID(DXVA2_ModeH264_E,         0x1b81be68, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVA2_ModeH264_F,         0x1b81be69, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVADDI_Intel_ModeH264_E, 0x604F8E68, 0x4951,0x4C54,0x88,0xFE,0xAB,0xD2,0x5C,0x15,0xB3,0xD6);
+DEFINE_GUID(DXVA2_ModeVC1_D,          0x1b81beA3, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVA2_ModeVC1_D2010,      0x1b81beA4, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVA2_ModeHEVC_VLD_Main,  0x5b11d51b, 0x2f4c,0x4452,0xbc,0xc3,0x09,0xf2,0xa1,0x16,0x0c,0xc0);
+DEFINE_GUID(DXVA2_ModeHEVC_VLD_Main10,0x107af0e0, 0xef1a,0x4d19,0xab,0xa8,0x67,0xa1,0x63,0x07,0x3d,0x13);
+DEFINE_GUID(DXVA2_NoEncrypt,          0x1b81beD0, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(GUID_NULL,                0x00000000, 0x0000,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
+
+typedef struct dxva2_mode {
+  const GUID     *guid;
+  enum AVCodecID codec;
+} dxva2_mode;
+
+static const dxva2_mode dxva2_modes[] = {
+    /* MPEG-2 */
+    { &DXVA2_ModeMPEG2_VLD,      AV_CODEC_ID_MPEG2VIDEO },
+    { &DXVA2_ModeMPEG2and1_VLD,  AV_CODEC_ID_MPEG2VIDEO },
+
+    /* H.264 */
+    { &DXVA2_ModeH264_F,         AV_CODEC_ID_H264 },
+    { &DXVA2_ModeH264_E,         AV_CODEC_ID_H264 },
+    /* Intel specific H.264 mode */
+    { &DXVADDI_Intel_ModeH264_E, AV_CODEC_ID_H264 },
+
+    /* VC-1 / WMV3 */
+    { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_VC1  },
+    { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_WMV3 },
+    { &DXVA2_ModeVC1_D,          AV_CODEC_ID_VC1  },
+    { &DXVA2_ModeVC1_D,          AV_CODEC_ID_WMV3 },
+
+    /* HEVC/H.265 */
+    { &DXVA2_ModeHEVC_VLD_Main,  AV_CODEC_ID_HEVC },
+    { &DXVA2_ModeHEVC_VLD_Main10, AV_CODEC_ID_HEVC },
+
+    { NULL,                      0 },
+};
+
+typedef struct DXVA2Context {
+    IDirectXVideoDecoder        *decoder;
+
+    GUID                        decoder_guid;
+    DXVA2_ConfigPictureDecode   decoder_config;
+    IDirectXVideoDecoderService *decoder_service;
+
+    AVFrame                     *tmp_frame;
+
+    AVBufferRef                 *hw_device_ctx;
+    AVBufferRef                 *hw_frames_ctx;
+} DXVA2Context;
+
+static void dxva2_uninit(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    DXVA2Context *ctx = ist->hwaccel_ctx;
+
+    ist->hwaccel_uninit        = NULL;
+    ist->hwaccel_get_buffer    = NULL;
+    ist->hwaccel_retrieve_data = NULL;
+
+    if (ctx->decoder_service)
+        IDirectXVideoDecoderService_Release(ctx->decoder_service);
+
+    av_buffer_unref(&ctx->hw_frames_ctx);
+    av_buffer_unref(&ctx->hw_device_ctx);
+
+    av_frame_free(&ctx->tmp_frame);
+
+    av_freep(&ist->hwaccel_ctx);
+    av_freep(&s->hwaccel_context);
+}
+
+static int dxva2_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
+{
+    InputStream  *ist = s->opaque;
+    DXVA2Context *ctx = ist->hwaccel_ctx;
+
+    return av_hwframe_get_buffer(ctx->hw_frames_ctx, frame, 0);
+}
+
+static int dxva2_retrieve_data(AVCodecContext *s, AVFrame *frame)
+{
+    InputStream        *ist = s->opaque;
+    DXVA2Context       *ctx = ist->hwaccel_ctx;
+    int                ret;
+
+    ret = av_hwframe_transfer_data(ctx->tmp_frame, frame, 0);
+    if (ret < 0)
+        return ret;
+
+    ret = av_frame_copy_props(ctx->tmp_frame, frame);
+    if (ret < 0) {
+        av_frame_unref(ctx->tmp_frame);
+        return ret;
+    }
+
+    av_frame_unref(frame);
+    av_frame_move_ref(frame, ctx->tmp_frame);
+
+    return 0;
+}
+
+static int dxva2_alloc(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    DXVA2Context *ctx;
+    HANDLE device_handle;
+    HRESULT hr;
+
+    AVHWDeviceContext    *device_ctx;
+    AVDXVA2DeviceContext *device_hwctx;
+    int ret;
+
+    ctx = av_mallocz(sizeof(*ctx));
+    if (!ctx)
+        return AVERROR(ENOMEM);
+
+    ist->hwaccel_ctx           = ctx;
+    ist->hwaccel_uninit        = dxva2_uninit;
+    ist->hwaccel_get_buffer    = dxva2_get_buffer;
+    ist->hwaccel_retrieve_data = dxva2_retrieve_data;
+
+    ret = av_hwdevice_ctx_create(&ctx->hw_device_ctx, AV_HWDEVICE_TYPE_DXVA2,
+                                 ist->hwaccel_device, NULL, 0);
+    if (ret < 0)
+        goto fail;
+    device_ctx   = (AVHWDeviceContext*)ctx->hw_device_ctx->data;
+    device_hwctx = device_ctx->hwctx;
+
+    hr = IDirect3DDeviceManager9_OpenDeviceHandle(device_hwctx->devmgr,
+                                                  &device_handle);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Failed to open a device handle\n");
+        goto fail;
+    }
+
+    hr = IDirect3DDeviceManager9_GetVideoService(device_hwctx->devmgr, device_handle,
+                                                 &IID_IDirectXVideoDecoderService,
+                                                 (void **)&ctx->decoder_service);
+    IDirect3DDeviceManager9_CloseDeviceHandle(device_hwctx->devmgr, device_handle);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Failed to create IDirectXVideoDecoderService\n");
+        goto fail;
+    }
+
+    ctx->tmp_frame = av_frame_alloc();
+    if (!ctx->tmp_frame)
+        goto fail;
+
+    s->hwaccel_context = av_mallocz(sizeof(struct dxva_context));
+    if (!s->hwaccel_context)
+        goto fail;
+
+    return 0;
+fail:
+    dxva2_uninit(s);
+    return AVERROR(EINVAL);
+}
+
+static int dxva2_get_decoder_configuration(AVCodecContext *s, const GUID *device_guid,
+                                           const DXVA2_VideoDesc *desc,
+                                           DXVA2_ConfigPictureDecode *config)
+{
+    InputStream  *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    DXVA2Context *ctx = ist->hwaccel_ctx;
+    unsigned cfg_count = 0, best_score = 0;
+    DXVA2_ConfigPictureDecode *cfg_list = NULL;
+    DXVA2_ConfigPictureDecode best_cfg = {{0}};
+    HRESULT hr;
+    int i;
+
+    hr = IDirectXVideoDecoderService_GetDecoderConfigurations(ctx->decoder_service, device_guid, desc, NULL, &cfg_count, &cfg_list);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Unable to retrieve decoder configurations\n");
+        return AVERROR(EINVAL);
+    }
+
+    for (i = 0; i < cfg_count; i++) {
+        DXVA2_ConfigPictureDecode *cfg = &cfg_list[i];
+
+        unsigned score;
+        if (cfg->ConfigBitstreamRaw == 1)
+            score = 1;
+        else if (s->codec_id == AV_CODEC_ID_H264 && cfg->ConfigBitstreamRaw == 2)
+            score = 2;
+        else
+            continue;
+        if (IsEqualGUID(&cfg->guidConfigBitstreamEncryption, &DXVA2_NoEncrypt))
+            score += 16;
+        if (score > best_score) {
+            best_score = score;
+            best_cfg   = *cfg;
+        }
+    }
+    CoTaskMemFree(cfg_list);
+
+    if (!best_score) {
+        av_log(NULL, loglevel, "No valid decoder configuration available\n");
+        return AVERROR(EINVAL);
+    }
+
+    *config = best_cfg;
+    return 0;
+}
+
+static int dxva2_create_decoder(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    DXVA2Context *ctx = ist->hwaccel_ctx;
+    struct dxva_context *dxva_ctx = s->hwaccel_context;
+    GUID *guid_list = NULL;
+    unsigned guid_count = 0, i, j;
+    GUID device_guid = GUID_NULL;
+    const D3DFORMAT surface_format = s->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ?
+                                     MKTAG('P', '0', '1', '0') : MKTAG('N', 'V', '1', '2');
+    D3DFORMAT target_format = 0;
+    DXVA2_VideoDesc desc = { 0 };
+    DXVA2_ConfigPictureDecode config;
+    HRESULT hr;
+    int surface_alignment, num_surfaces;
+    int ret;
+
+    AVDXVA2FramesContext *frames_hwctx;
+    AVHWFramesContext *frames_ctx;
+
+    hr = IDirectXVideoDecoderService_GetDecoderDeviceGuids(ctx->decoder_service, &guid_count, &guid_list);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Failed to retrieve decoder device GUIDs\n");
+        goto fail;
+    }
+
+    for (i = 0; dxva2_modes[i].guid; i++) {
+        D3DFORMAT *target_list = NULL;
+        unsigned target_count = 0;
+        const dxva2_mode *mode = &dxva2_modes[i];
+        if (mode->codec != s->codec_id)
+            continue;
+
+        for (j = 0; j < guid_count; j++) {
+            if (IsEqualGUID(mode->guid, &guid_list[j]))
+                break;
+        }
+        if (j == guid_count)
+            continue;
+
+        hr = IDirectXVideoDecoderService_GetDecoderRenderTargets(ctx->decoder_service, mode->guid, &target_count, &target_list);
+        if (FAILED(hr)) {
+            continue;
+        }
+        for (j = 0; j < target_count; j++) {
+            const D3DFORMAT format = target_list[j];
+            if (format == surface_format) {
+                target_format = format;
+                break;
+            }
+        }
+        CoTaskMemFree(target_list);
+        if (target_format) {
+            device_guid = *mode->guid;
+            break;
+        }
+    }
+    CoTaskMemFree(guid_list);
+
+    if (IsEqualGUID(&device_guid, &GUID_NULL)) {
+        av_log(NULL, loglevel, "No decoder device for codec found\n");
+        goto fail;
+    }
+
+    desc.SampleWidth  = s->coded_width;
+    desc.SampleHeight = s->coded_height;
+    desc.Format       = target_format;
+
+    ret = dxva2_get_decoder_configuration(s, &device_guid, &desc, &config);
+    if (ret < 0) {
+        goto fail;
+    }
+
+    /* decoding MPEG-2 requires additional alignment on some Intel GPUs,
+       but it causes issues for H.264 on certain AMD GPUs..... */
+    if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO)
+        surface_alignment = 32;
+    /* the HEVC DXVA2 spec asks for 128 pixel aligned surfaces to ensure
+       all coding features have enough room to work with */
+    else if  (s->codec_id == AV_CODEC_ID_HEVC)
+        surface_alignment = 128;
+    else
+        surface_alignment = 16;
+
+    /* 4 base work surfaces */
+    num_surfaces = 4;
+
+    /* add surfaces based on number of possible refs */
+    if (s->codec_id == AV_CODEC_ID_H264 || s->codec_id == AV_CODEC_ID_HEVC)
+        num_surfaces += 16;
+    else
+        num_surfaces += 2;
+
+    /* add extra surfaces for frame threading */
+    if (s->active_thread_type & FF_THREAD_FRAME)
+        num_surfaces += s->thread_count;
+
+    ctx->hw_frames_ctx = av_hwframe_ctx_alloc(ctx->hw_device_ctx);
+    if (!ctx->hw_frames_ctx)
+        goto fail;
+    frames_ctx   = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
+    frames_hwctx = frames_ctx->hwctx;
+
+    frames_ctx->format            = AV_PIX_FMT_DXVA2_VLD;
+    frames_ctx->sw_format         = s->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ?
+                                    AV_PIX_FMT_P010 : AV_PIX_FMT_NV12;
+    frames_ctx->width             = FFALIGN(s->coded_width, surface_alignment);
+    frames_ctx->height            = FFALIGN(s->coded_height, surface_alignment);
+    frames_ctx->initial_pool_size = num_surfaces;
+
+    frames_hwctx->surface_type = DXVA2_VideoDecoderRenderTarget;
+
+    ret = av_hwframe_ctx_init(ctx->hw_frames_ctx);
+    if (ret < 0) {
+        av_log(NULL, loglevel, "Failed to initialize the HW frames context\n");
+        goto fail;
+    }
+
+    hr = IDirectXVideoDecoderService_CreateVideoDecoder(ctx->decoder_service, &device_guid,
+                                                        &desc, &config, frames_hwctx->surfaces,
+                                                        frames_hwctx->nb_surfaces, &frames_hwctx->decoder_to_release);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Failed to create DXVA2 video decoder\n");
+        goto fail;
+    }
+
+    ctx->decoder_guid   = device_guid;
+    ctx->decoder_config = config;
+
+    dxva_ctx->cfg           = &ctx->decoder_config;
+    dxva_ctx->decoder       = frames_hwctx->decoder_to_release;
+    dxva_ctx->surface       = frames_hwctx->surfaces;
+    dxva_ctx->surface_count = frames_hwctx->nb_surfaces;
+
+    if (IsEqualGUID(&ctx->decoder_guid, &DXVADDI_Intel_ModeH264_E))
+        dxva_ctx->workaround |= FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO;
+
+    return 0;
+fail:
+    av_buffer_unref(&ctx->hw_frames_ctx);
+    return AVERROR(EINVAL);
+}
+
+int dxva2_init(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    DXVA2Context *ctx;
+    int ret;
+
+    if (!ist->hwaccel_ctx) {
+        ret = dxva2_alloc(s);
+        if (ret < 0)
+            return ret;
+    }
+    ctx = ist->hwaccel_ctx;
+
+    if (s->codec_id == AV_CODEC_ID_H264 &&
+        (s->profile & ~FF_PROFILE_H264_CONSTRAINED) > FF_PROFILE_H264_HIGH) {
+        av_log(NULL, loglevel, "Unsupported H.264 profile for DXVA2 HWAccel: %d\n", s->profile);
+        return AVERROR(EINVAL);
+    }
+
+    if (s->codec_id == AV_CODEC_ID_HEVC &&
+        s->profile != FF_PROFILE_HEVC_MAIN && s->profile != FF_PROFILE_HEVC_MAIN_10) {
+        av_log(NULL, loglevel, "Unsupported HEVC profile for DXVA2 HWAccel: %d\n", s->profile);
+        return AVERROR(EINVAL);
+    }
+
+    av_buffer_unref(&ctx->hw_frames_ctx);
+
+    ret = dxva2_create_decoder(s);
+    if (ret < 0) {
+        av_log(NULL, loglevel, "Error creating the DXVA2 decoder\n");
+        return ret;
+    }
+
+    return 0;
+}
diff --git a/avtools/avconv_filter.c b/avtools/avconv_filter.c
new file mode 100644
index 0000000000..e53dcd271c
--- /dev/null
+++ b/avtools/avconv_filter.c
@@ -0,0 +1,818 @@
+/*
+ * avconv filter configuration
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "avconv.h"
+
+#include "libavfilter/avfilter.h"
+#include "libavfilter/buffersrc.h"
+
+#include "libavresample/avresample.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/display.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/samplefmt.h"
+
+/* Define a function for building a string containing a list of
+ * allowed formats. */
+#define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name)   \
+static char *choose_ ## suffix (OutputFilter *ofilter)                         \
+{                                                                              \
+    if (ofilter->var != none) {                                                \
+        get_name(ofilter->var);                                                \
+        return av_strdup(name);                                                \
+    } else if (ofilter->supported_list) {                                      \
+        const type *p;                                                         \
+        AVIOContext *s = NULL;                                                 \
+        uint8_t *ret;                                                          \
+        int len;                                                               \
+                                                                               \
+        if (avio_open_dyn_buf(&s) < 0)                                         \
+            exit(1);                                                           \
+                                                                               \
+        for (p = ofilter->supported_list; *p != none; p++) {                   \
+            get_name(*p);                                                      \
+            avio_printf(s, "%s|", name);                                       \
+        }                                                                      \
+        len = avio_close_dyn_buf(s, &ret);                                     \
+        ret[len - 1] = 0;                                                      \
+        return ret;                                                            \
+    } else                                                                     \
+        return NULL;                                                           \
+}
+
+DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
+                  GET_PIX_FMT_NAME)
+
+DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
+                  AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
+
+DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
+                  GET_SAMPLE_RATE_NAME)
+
+DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
+                  GET_CH_LAYOUT_NAME)
+
+int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
+{
+    FilterGraph *fg = av_mallocz(sizeof(*fg));
+
+    if (!fg)
+        exit(1);
+    fg->index = nb_filtergraphs;
+
+    GROW_ARRAY(fg->outputs, fg->nb_outputs);
+    if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
+        exit(1);
+    fg->outputs[0]->ost   = ost;
+    fg->outputs[0]->graph = fg;
+    fg->outputs[0]->format = -1;
+
+    ost->filter = fg->outputs[0];
+
+    GROW_ARRAY(fg->inputs, fg->nb_inputs);
+    if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
+        exit(1);
+    fg->inputs[0]->ist   = ist;
+    fg->inputs[0]->graph = fg;
+    fg->inputs[0]->format = -1;
+
+    fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
+    if (!fg->inputs[0])
+        exit_program(1);
+
+    GROW_ARRAY(ist->filters, ist->nb_filters);
+    ist->filters[ist->nb_filters - 1] = fg->inputs[0];
+
+    GROW_ARRAY(filtergraphs, nb_filtergraphs);
+    filtergraphs[nb_filtergraphs - 1] = fg;
+
+    return 0;
+}
+
+static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
+{
+    InputStream *ist = NULL;
+    enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
+    int i;
+
+    // TODO: support other filter types
+    if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
+        av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
+               "currently.\n");
+        exit(1);
+    }
+
+    if (in->name) {
+        AVFormatContext *s;
+        AVStream       *st = NULL;
+        char *p;
+        int file_idx = strtol(in->name, &p, 0);
+
+        if (file_idx < 0 || file_idx >= nb_input_files) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
+                   file_idx, fg->graph_desc);
+            exit(1);
+        }
+        s = input_files[file_idx]->ctx;
+
+        for (i = 0; i < s->nb_streams; i++) {
+            if (s->streams[i]->codecpar->codec_type != type)
+                continue;
+            if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
+                st = s->streams[i];
+                break;
+            }
+        }
+        if (!st) {
+            av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
+                   "matches no streams.\n", p, fg->graph_desc);
+            exit(1);
+        }
+        ist = input_streams[input_files[file_idx]->ist_index + st->index];
+    } else {
+        /* find the first unused stream of corresponding type */
+        for (i = 0; i < nb_input_streams; i++) {
+            ist = input_streams[i];
+            if (ist->dec_ctx->codec_type == type && ist->discard)
+                break;
+        }
+        if (i == nb_input_streams) {
+            av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
+                   "unlabeled input pad %d on filter %s\n", in->pad_idx,
+                   in->filter_ctx->name);
+            exit(1);
+        }
+    }
+    av_assert0(ist);
+
+    ist->discard         = 0;
+    ist->decoding_needed = 1;
+    ist->st->discard = AVDISCARD_NONE;
+
+    GROW_ARRAY(fg->inputs, fg->nb_inputs);
+    if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
+        exit(1);
+    fg->inputs[fg->nb_inputs - 1]->ist   = ist;
+    fg->inputs[fg->nb_inputs - 1]->graph = fg;
+    fg->inputs[fg->nb_inputs - 1]->format = -1;
+
+    fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
+    if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
+        exit_program(1);
+
+    GROW_ARRAY(ist->filters, ist->nb_filters);
+    ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
+}
+
+int init_complex_filtergraph(FilterGraph *fg)
+{
+    AVFilterInOut *inputs, *outputs, *cur;
+    AVFilterGraph *graph;
+    int ret = 0;
+
+    /* this graph is only used for determining the kinds of inputs
+     * and outputs we have, and is discarded on exit from this function */
+    graph = avfilter_graph_alloc();
+    if (!graph)
+        return AVERROR(ENOMEM);
+
+    ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
+    if (ret < 0)
+        goto fail;
+
+    for (cur = inputs; cur; cur = cur->next)
+        init_input_filter(fg, cur);
+
+    for (cur = outputs; cur;) {
+        GROW_ARRAY(fg->outputs, fg->nb_outputs);
+        fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
+        if (!fg->outputs[fg->nb_outputs - 1])
+            exit(1);
+
+        fg->outputs[fg->nb_outputs - 1]->graph   = fg;
+        fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
+        fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
+                                                                         cur->pad_idx);
+        cur = cur->next;
+        fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
+    }
+
+fail:
+    avfilter_inout_free(&inputs);
+    avfilter_graph_free(&graph);
+    return ret;
+}
+
+static int insert_trim(int64_t start_time, int64_t duration,
+                       AVFilterContext **last_filter, int *pad_idx,
+                       const char *filter_name)
+{
+    AVFilterGraph *graph = (*last_filter)->graph;
+    AVFilterContext *ctx;
+    const AVFilter *trim;
+    enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
+    const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
+    int ret = 0;
+
+    if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
+        return 0;
+
+    trim = avfilter_get_by_name(name);
+    if (!trim) {
+        av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
+               "recording time.\n", name);
+        return AVERROR_FILTER_NOT_FOUND;
+    }
+
+    ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
+    if (!ctx)
+        return AVERROR(ENOMEM);
+
+    if (duration != INT64_MAX) {
+        ret = av_opt_set_double(ctx, "duration", (double)duration / 1e6,
+                                AV_OPT_SEARCH_CHILDREN);
+    }
+    if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
+        ret = av_opt_set_double(ctx, "start", (double)start_time / 1e6,
+                                AV_OPT_SEARCH_CHILDREN);
+    }
+    if (ret < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
+        return ret;
+    }
+
+    ret = avfilter_init_str(ctx, NULL);
+    if (ret < 0)
+        return ret;
+
+    ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
+    if (ret < 0)
+        return ret;
+
+    *last_filter = ctx;
+    *pad_idx     = 0;
+    return 0;
+}
+
+static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
+                         const char *filter_name, const char *args)
+{
+    AVFilterGraph *graph = (*last_filter)->graph;
+    AVFilterContext *ctx;
+    int ret;
+
+    ret = avfilter_graph_create_filter(&ctx,
+                                       avfilter_get_by_name(filter_name),
+                                       filter_name, args, NULL, graph);
+    if (ret < 0)
+        return ret;
+
+    ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
+    if (ret < 0)
+        return ret;
+
+    *last_filter = ctx;
+    *pad_idx     = 0;
+    return 0;
+}
+
+static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+    char *pix_fmts;
+    OutputStream *ost = ofilter->ost;
+    OutputFile    *of = output_files[ost->file_index];
+    AVFilterContext *last_filter = out->filter_ctx;
+    int pad_idx = out->pad_idx;
+    int ret;
+    char name[255];
+
+    snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
+    ret = avfilter_graph_create_filter(&ofilter->filter,
+                                       avfilter_get_by_name("buffersink"),
+                                       name, NULL, NULL, fg->graph);
+    if (ret < 0)
+        return ret;
+
+    if (ofilter->width || ofilter->height) {
+        char args[255];
+        AVFilterContext *filter;
+
+        snprintf(args, sizeof(args), "%d:%d:0x%X",
+                 ofilter->width, ofilter->height,
+                 (unsigned)ost->sws_flags);
+        snprintf(name, sizeof(name), "scaler for output stream %d:%d",
+                 ost->file_index, ost->index);
+        if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
+                                                name, args, NULL, fg->graph)) < 0)
+            return ret;
+        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
+            return ret;
+
+        last_filter = filter;
+        pad_idx = 0;
+    }
+
+    if ((pix_fmts = choose_pix_fmts(ofilter))) {
+        AVFilterContext *filter;
+        snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
+                 ost->file_index, ost->index);
+        ret = avfilter_graph_create_filter(&filter,
+                                           avfilter_get_by_name("format"),
+                                           "format", pix_fmts, NULL, fg->graph);
+        av_freep(&pix_fmts);
+        if (ret < 0)
+            return ret;
+        if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
+            return ret;
+
+        last_filter = filter;
+        pad_idx     = 0;
+    }
+
+    if (ost->frame_rate.num) {
+        AVFilterContext *fps;
+        char args[255];
+
+        snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
+                 ost->frame_rate.den);
+        snprintf(name, sizeof(name), "fps for output stream %d:%d",
+                 ost->file_index, ost->index);
+        ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
+                                           name, args, NULL, fg->graph);
+        if (ret < 0)
+            return ret;
+
+        ret = avfilter_link(last_filter, pad_idx, fps, 0);
+        if (ret < 0)
+            return ret;
+        last_filter = fps;
+        pad_idx = 0;
+    }
+
+    snprintf(name, sizeof(name), "trim for output stream %d:%d",
+             ost->file_index, ost->index);
+    ret = insert_trim(of->start_time, of->recording_time,
+                      &last_filter, &pad_idx, name);
+    if (ret < 0)
+        return ret;
+
+
+    if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
+        return ret;
+
+    return 0;
+}
+
+static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+    OutputStream *ost = ofilter->ost;
+    OutputFile    *of = output_files[ost->file_index];
+    AVCodecContext *codec  = ost->enc_ctx;
+    AVFilterContext *last_filter = out->filter_ctx;
+    int pad_idx = out->pad_idx;
+    char *sample_fmts, *sample_rates, *channel_layouts;
+    char name[255];
+    int ret;
+
+
+    snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
+    ret = avfilter_graph_create_filter(&ofilter->filter,
+                                       avfilter_get_by_name("abuffersink"),
+                                       name, NULL, NULL, fg->graph);
+    if (ret < 0)
+        return ret;
+
+    if (codec->channels && !codec->channel_layout)
+        codec->channel_layout = av_get_default_channel_layout(codec->channels);
+
+    sample_fmts     = choose_sample_fmts(ofilter);
+    sample_rates    = choose_sample_rates(ofilter);
+    channel_layouts = choose_channel_layouts(ofilter);
+    if (sample_fmts || sample_rates || channel_layouts) {
+        AVFilterContext *format;
+        char args[256];
+        int len = 0;
+
+        if (sample_fmts)
+            len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
+                            sample_fmts);
+        if (sample_rates)
+            len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
+                            sample_rates);
+        if (channel_layouts)
+            len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
+                            channel_layouts);
+        args[len - 1] = 0;
+
+        av_freep(&sample_fmts);
+        av_freep(&sample_rates);
+        av_freep(&channel_layouts);
+
+        snprintf(name, sizeof(name), "audio format for output stream %d:%d",
+                 ost->file_index, ost->index);
+        ret = avfilter_graph_create_filter(&format,
+                                           avfilter_get_by_name("aformat"),
+                                           name, args, NULL, fg->graph);
+        if (ret < 0)
+            return ret;
+
+        ret = avfilter_link(last_filter, pad_idx, format, 0);
+        if (ret < 0)
+            return ret;
+
+        last_filter = format;
+        pad_idx = 0;
+    }
+
+    snprintf(name, sizeof(name), "trim for output stream %d:%d",
+             ost->file_index, ost->index);
+    ret = insert_trim(of->start_time, of->recording_time,
+                      &last_filter, &pad_idx, name);
+    if (ret < 0)
+        return ret;
+
+    if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
+        return ret;
+
+    return 0;
+}
+
+#define DESCRIBE_FILTER_LINK(f, inout, in)                         \
+{                                                                  \
+    AVFilterContext *ctx = inout->filter_ctx;                      \
+    AVFilterPad *pads = in ? ctx->input_pads  : ctx->output_pads;  \
+    int       nb_pads = in ? ctx->nb_inputs   : ctx->nb_outputs;   \
+    AVIOContext *pb;                                               \
+                                                                   \
+    if (avio_open_dyn_buf(&pb) < 0)                                \
+        exit(1);                                                   \
+                                                                   \
+    avio_printf(pb, "%s", ctx->filter->name);                      \
+    if (nb_pads > 1)                                               \
+        avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
+    avio_w8(pb, 0);                                                \
+    avio_close_dyn_buf(pb, &f->name);                              \
+}
+
+int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+    av_freep(&ofilter->name);
+    DESCRIBE_FILTER_LINK(ofilter, out, 0);
+
+    switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
+    case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
+    case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
+    default: av_assert0(0);
+    }
+}
+
+static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
+                                        AVFilterInOut *in)
+{
+    AVFilterContext *last_filter;
+    const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
+    InputStream *ist = ifilter->ist;
+    InputFile     *f = input_files[ist->file_index];
+    AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
+                                         ist->st->time_base;
+    AVBufferSrcParameters *par;
+    char name[255];
+    int ret, pad_idx = 0;
+
+    snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
+             ist->file_index, ist->st->index);
+
+    ifilter->filter = avfilter_graph_alloc_filter(fg->graph, buffer_filt, name);
+    if (!ifilter->filter)
+        return AVERROR(ENOMEM);
+
+    par = av_buffersrc_parameters_alloc();
+    if (!par)
+        return AVERROR(ENOMEM);
+
+    par->sample_aspect_ratio = ifilter->sample_aspect_ratio;
+    par->width               = ifilter->width;
+    par->height              = ifilter->height;
+    par->format              = ifilter->format;
+    par->time_base           = tb;
+    if (ist->framerate.num)
+        par->frame_rate      = ist->framerate;
+    par->hw_frames_ctx       = ifilter->hw_frames_ctx;
+
+    ret = av_buffersrc_parameters_set(ifilter->filter, par);
+    av_freep(&par);
+    if (ret < 0)
+        return ret;
+
+    ret = avfilter_init_str(ifilter->filter, NULL);
+    if (ret < 0)
+        return ret;
+
+    last_filter = ifilter->filter;
+
+    if (ist->autorotate) {
+        uint8_t* displaymatrix = av_stream_get_side_data(ist->st,
+                                                         AV_PKT_DATA_DISPLAYMATRIX, NULL);
+        if (displaymatrix) {
+            double rot = av_display_rotation_get((int32_t*) displaymatrix);
+            if (rot < -135 || rot > 135) {
+                ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
+                if (ret < 0)
+                    return ret;
+                ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
+            } else if (rot < -45) {
+                ret = insert_filter(&last_filter, &pad_idx, "transpose", "dir=clock");
+            } else if (rot > 45) {
+                ret = insert_filter(&last_filter, &pad_idx, "transpose", "dir=cclock");
+            }
+            if (ret < 0)
+                return ret;
+        }
+    }
+
+    snprintf(name, sizeof(name), "trim for input stream %d:%d",
+             ist->file_index, ist->st->index);
+    ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
+                      AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
+    if (ret < 0)
+        return ret;
+
+    if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
+        return ret;
+    return 0;
+}
+
+static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
+                                        AVFilterInOut *in)
+{
+    AVFilterContext *last_filter;
+    const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
+    InputStream *ist = ifilter->ist;
+    InputFile     *f = input_files[ist->file_index];
+    AVBufferSrcParameters *par;
+    char args[255], name[255];
+    int ret, pad_idx = 0;
+
+    snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
+             ist->file_index, ist->st->index);
+
+    ifilter->filter = avfilter_graph_alloc_filter(fg->graph, abuffer_filt, name);
+    if (!ifilter->filter)
+        return AVERROR(ENOMEM);
+
+    par = av_buffersrc_parameters_alloc();
+    if (!par)
+        return AVERROR(ENOMEM);
+
+    par->time_base      = (AVRational){ 1, ifilter->sample_rate };
+    par->sample_rate    = ifilter->sample_rate;
+    par->format         = ifilter->format;
+    par->channel_layout = ifilter->channel_layout;
+
+    ret = av_buffersrc_parameters_set(ifilter->filter, par);
+    av_freep(&par);
+    if (ret < 0)
+        return ret;
+
+    ret = avfilter_init_str(ifilter->filter, NULL);
+    if (ret < 0)
+        return ret;
+    last_filter = ifilter->filter;
+
+    if (audio_sync_method > 0) {
+        AVFilterContext *async;
+        int  len = 0;
+
+        av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
+               "asyncts audio filter instead.\n");
+
+        if (audio_sync_method > 1)
+            len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
+                            "max_comp=%d:", audio_sync_method);
+        snprintf(args + len, sizeof(args) - len, "min_delta=%f",
+                 audio_drift_threshold);
+
+        snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
+                 fg->index, ist->file_index, ist->st->index);
+        ret = avfilter_graph_create_filter(&async,
+                                           avfilter_get_by_name("asyncts"),
+                                           name, args, NULL, fg->graph);
+        if (ret < 0)
+            return ret;
+
+        ret = avfilter_link(last_filter, 0, async, 0);
+        if (ret < 0)
+            return ret;
+
+        last_filter = async;
+    }
+    if (audio_volume != 256) {
+        AVFilterContext *volume;
+
+        av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
+               "audio filter instead.\n");
+
+        snprintf(args, sizeof(args), "volume=%f", audio_volume / 256.0);
+
+        snprintf(name, sizeof(name), "graph %d volume for input stream %d:%d",
+                 fg->index, ist->file_index, ist->st->index);
+        ret = avfilter_graph_create_filter(&volume,
+                                           avfilter_get_by_name("volume"),
+                                           name, args, NULL, fg->graph);
+        if (ret < 0)
+            return ret;
+
+        ret = avfilter_link(last_filter, 0, volume, 0);
+        if (ret < 0)
+            return ret;
+
+        last_filter = volume;
+    }
+
+    snprintf(name, sizeof(name), "trim for input stream %d:%d",
+             ist->file_index, ist->st->index);
+    ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
+                      AV_NOPTS_VALUE : 0, f->recording_time, &last_filter, &pad_idx, name);
+    if (ret < 0)
+        return ret;
+
+    if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
+        return ret;
+
+    return 0;
+}
+
+static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
+                                  AVFilterInOut *in)
+{
+    av_freep(&ifilter->name);
+    DESCRIBE_FILTER_LINK(ifilter, in, 1);
+
+    switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
+    case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
+    case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
+    default: av_assert0(0);
+    }
+}
+
+int configure_filtergraph(FilterGraph *fg)
+{
+    AVFilterInOut *inputs, *outputs, *cur;
+    int ret, i, simple = filtergraph_is_simple(fg);
+    const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
+                                      fg->graph_desc;
+
+    avfilter_graph_free(&fg->graph);
+    if (!(fg->graph = avfilter_graph_alloc()))
+        return AVERROR(ENOMEM);
+
+    if (simple) {
+        OutputStream *ost = fg->outputs[0]->ost;
+        char args[512];
+        AVDictionaryEntry *e = NULL;
+
+        snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
+        fg->graph->scale_sws_opts = av_strdup(args);
+
+        args[0] = '\0';
+        while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
+                                AV_DICT_IGNORE_SUFFIX))) {
+            av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
+        }
+        if (strlen(args))
+            args[strlen(args) - 1] = '\0';
+        fg->graph->resample_lavr_opts = av_strdup(args);
+    }
+
+    if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
+        goto fail;
+
+    if (hw_device_ctx) {
+        for (i = 0; i < fg->graph->nb_filters; i++) {
+            fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx);
+        }
+    }
+
+    if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
+        av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
+               "exactly one input and output.\n", graph_desc);
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    for (cur = inputs, i = 0; cur; cur = cur->next, i++)
+        if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
+            goto fail;
+    avfilter_inout_free(&inputs);
+
+    for (cur = outputs, i = 0; cur; cur = cur->next, i++) {
+        OutputFilter *ofilter = fg->outputs[i];
+        if (ofilter->ost)
+            configure_output_filter(fg, ofilter, cur);
+    }
+
+    avfilter_inout_free(&outputs);
+
+    if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
+        goto fail;
+
+    /* limit the lists of allowed formats to the ones selected, to
+     * make sure they stay the same if the filtergraph is reconfigured later */
+    for (i = 0; i < fg->nb_outputs; i++) {
+        OutputFilter *ofilter = fg->outputs[i];
+        AVFilterLink *link = ofilter->filter->inputs[0];
+
+        ofilter->format = link->format;
+
+        ofilter->width  = link->w;
+        ofilter->height = link->h;
+
+        ofilter->sample_rate    = link->sample_rate;
+        ofilter->channel_layout = link->channel_layout;
+    }
+
+    for (i = 0; i < fg->nb_inputs; i++) {
+        while (av_fifo_size(fg->inputs[i]->frame_queue)) {
+            AVFrame *tmp;
+            av_fifo_generic_read(fg->inputs[i]->frame_queue, &tmp, sizeof(tmp), NULL);
+            ret = av_buffersrc_add_frame(fg->inputs[i]->filter, tmp);
+            av_frame_free(&tmp);
+            if (ret < 0)
+                goto fail;
+        }
+    }
+
+    /* send the EOFs for the finished inputs */
+    for (i = 0; i < fg->nb_inputs; i++) {
+        if (fg->inputs[i]->eof) {
+            ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
+            if (ret < 0)
+                goto fail;
+        }
+    }
+
+    return 0;
+fail:
+    avfilter_graph_free(&fg->graph);
+    return ret;
+}
+
+int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
+{
+    av_buffer_unref(&ifilter->hw_frames_ctx);
+
+    ifilter->format = frame->format;
+
+    ifilter->width               = frame->width;
+    ifilter->height              = frame->height;
+    ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
+
+    ifilter->sample_rate         = frame->sample_rate;
+    ifilter->channel_layout      = frame->channel_layout;
+
+    if (frame->hw_frames_ctx) {
+        ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
+        if (!ifilter->hw_frames_ctx)
+            return AVERROR(ENOMEM);
+    }
+
+    return 0;
+}
+
+int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
+{
+    int i;
+    for (i = 0; i < fg->nb_inputs; i++)
+        if (fg->inputs[i]->ist == ist)
+            return 1;
+    return 0;
+}
+
+int filtergraph_is_simple(FilterGraph *fg)
+{
+    return !fg->graph_desc;
+}
diff --git a/avtools/avconv_opt.c b/avtools/avconv_opt.c
new file mode 100644
index 0000000000..e078a0b89d
--- /dev/null
+++ b/avtools/avconv_opt.c
@@ -0,0 +1,2745 @@
+/*
+ * avconv option parsing
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "avconv.h"
+#include "cmdutils.h"
+
+#include "libavformat/avformat.h"
+
+#include "libavcodec/avcodec.h"
+
+#include "libavfilter/avfilter.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/avutil.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/fifo.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/pixfmt.h"
+
+#define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
+
+#define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
+{\
+    int i, ret;\
+    for (i = 0; i < o->nb_ ## name; i++) {\
+        char *spec = o->name[i].specifier;\
+        if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
+            outvar = o->name[i].u.type;\
+        else if (ret < 0)\
+            exit_program(1);\
+    }\
+}
+
+const HWAccel hwaccels[] = {
+#if HAVE_VDPAU_X11
+    { "vdpau", vdpau_init, HWACCEL_VDPAU, AV_PIX_FMT_VDPAU },
+#endif
+#if HAVE_DXVA2_LIB
+    { "dxva2", dxva2_init, HWACCEL_DXVA2, AV_PIX_FMT_DXVA2_VLD },
+#endif
+#if CONFIG_VDA
+    { "vda",   vda_init,   HWACCEL_VDA,   AV_PIX_FMT_VDA },
+#endif
+#if CONFIG_LIBMFX
+    { "qsv",   qsv_init,   HWACCEL_QSV,   AV_PIX_FMT_QSV },
+#endif
+#if CONFIG_VAAPI
+    { "vaapi", vaapi_decode_init, HWACCEL_VAAPI, AV_PIX_FMT_VAAPI },
+#endif
+    { 0 },
+};
+int hwaccel_lax_profile_check = 0;
+AVBufferRef *hw_device_ctx;
+
+char *vstats_filename;
+
+float audio_drift_threshold = 0.1;
+float dts_delta_threshold   = 10;
+
+int audio_volume      = 256;
+int audio_sync_method = 0;
+int video_sync_method = VSYNC_AUTO;
+int do_benchmark      = 0;
+int do_hex_dump       = 0;
+int do_pkt_dump       = 0;
+int copy_ts           = 0;
+int copy_tb           = 1;
+int exit_on_error     = 0;
+int print_stats       = 1;
+int qp_hist           = 0;
+
+static int file_overwrite     = 0;
+static int file_skip          = 0;
+static int video_discard      = 0;
+static int intra_dc_precision = 8;
+static int using_stdin        = 0;
+static int input_sync;
+
+static void uninit_options(OptionsContext *o)
+{
+    const OptionDef *po = options;
+    int i;
+
+    /* all OPT_SPEC and OPT_STRING can be freed in generic way */
+    while (po->name) {
+        void *dst = (uint8_t*)o + po->u.off;
+
+        if (po->flags & OPT_SPEC) {
+            SpecifierOpt **so = dst;
+            int i, *count = (int*)(so + 1);
+            for (i = 0; i < *count; i++) {
+                av_freep(&(*so)[i].specifier);
+                if (po->flags & OPT_STRING)
+                    av_freep(&(*so)[i].u.str);
+            }
+            av_freep(so);
+            *count = 0;
+        } else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
+            av_freep(dst);
+        po++;
+    }
+
+    for (i = 0; i < o->nb_stream_maps; i++)
+        av_freep(&o->stream_maps[i].linklabel);
+    av_freep(&o->stream_maps);
+    av_freep(&o->meta_data_maps);
+    av_freep(&o->streamid_map);
+}
+
+static void init_options(OptionsContext *o)
+{
+    memset(o, 0, sizeof(*o));
+
+    o->mux_max_delay  = 0.7;
+    o->start_time     = AV_NOPTS_VALUE;
+    o->recording_time = INT64_MAX;
+    o->limit_filesize = UINT64_MAX;
+    o->chapters_input_file = INT_MAX;
+    o->accurate_seek  = 1;
+}
+
+/* return a copy of the input with the stream specifiers removed from the keys */
+static AVDictionary *strip_specifiers(AVDictionary *dict)
+{
+    AVDictionaryEntry *e = NULL;
+    AVDictionary    *ret = NULL;
+
+    while ((e = av_dict_get(dict, "", e, AV_DICT_IGNORE_SUFFIX))) {
+        char *p = strchr(e->key, ':');
+
+        if (p)
+            *p = 0;
+        av_dict_set(&ret, e->key, e->value, 0);
+        if (p)
+            *p = ':';
+    }
+    return ret;
+}
+
+static double parse_frame_aspect_ratio(const char *arg)
+{
+    int x = 0, y = 0;
+    double ar = 0;
+    const char *p;
+    char *end;
+
+    p = strchr(arg, ':');
+    if (p) {
+        x = strtol(arg, &end, 10);
+        if (end == p)
+            y = strtol(end + 1, &end, 10);
+        if (x > 0 && y > 0)
+            ar = (double)x / (double)y;
+    } else
+        ar = strtod(arg, NULL);
+
+    if (!ar) {
+        av_log(NULL, AV_LOG_FATAL, "Incorrect aspect ratio specification.\n");
+        exit_program(1);
+    }
+    return ar;
+}
+
+static int show_hwaccels(void *optctx, const char *opt, const char *arg)
+{
+    int i;
+
+    printf("Supported hardware acceleration:\n");
+    for (i = 0; hwaccels[i].name; i++) {
+        printf("%s\n", hwaccels[i].name);
+    }
+    printf("\n");
+    return 0;
+}
+
+static int opt_audio_codec(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "codec:a", arg, options);
+}
+
+static int opt_video_codec(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "codec:v", arg, options);
+}
+
+static int opt_subtitle_codec(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "codec:s", arg, options);
+}
+
+static int opt_data_codec(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "codec:d", arg, options);
+}
+
+static int opt_map(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    StreamMap *m = NULL;
+    int i, negative = 0, file_idx;
+    int sync_file_idx = -1, sync_stream_idx;
+    char *p, *sync;
+    char *map;
+
+    if (*arg == '-') {
+        negative = 1;
+        arg++;
+    }
+    map = av_strdup(arg);
+    if (!map)
+        return AVERROR(ENOMEM);
+
+    /* parse sync stream first, just pick first matching stream */
+    if (sync = strchr(map, ',')) {
+        *sync = 0;
+        sync_file_idx = strtol(sync + 1, &sync, 0);
+        if (sync_file_idx >= nb_input_files || sync_file_idx < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid sync file index: %d.\n", sync_file_idx);
+            exit_program(1);
+        }
+        if (*sync)
+            sync++;
+        for (i = 0; i < input_files[sync_file_idx]->nb_streams; i++)
+            if (check_stream_specifier(input_files[sync_file_idx]->ctx,
+                                       input_files[sync_file_idx]->ctx->streams[i], sync) == 1) {
+                sync_stream_idx = i;
+                break;
+            }
+        if (i == input_files[sync_file_idx]->nb_streams) {
+            av_log(NULL, AV_LOG_FATAL, "Sync stream specification in map %s does not "
+                                       "match any streams.\n", arg);
+            exit_program(1);
+        }
+    }
+
+
+    if (map[0] == '[') {
+        /* this mapping refers to lavfi output */
+        const char *c = map + 1;
+        GROW_ARRAY(o->stream_maps, o->nb_stream_maps);
+        m = &o->stream_maps[o->nb_stream_maps - 1];
+        m->linklabel = av_get_token(&c, "]");
+        if (!m->linklabel) {
+            av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
+            exit_program(1);
+        }
+    } else {
+        file_idx = strtol(map, &p, 0);
+        if (file_idx >= nb_input_files || file_idx < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
+            exit_program(1);
+        }
+        if (negative)
+            /* disable some already defined maps */
+            for (i = 0; i < o->nb_stream_maps; i++) {
+                m = &o->stream_maps[i];
+                if (file_idx == m->file_index &&
+                    check_stream_specifier(input_files[m->file_index]->ctx,
+                                           input_files[m->file_index]->ctx->streams[m->stream_index],
+                                           *p == ':' ? p + 1 : p) > 0)
+                    m->disabled = 1;
+            }
+        else
+            for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
+                if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
+                            *p == ':' ? p + 1 : p) <= 0)
+                    continue;
+                GROW_ARRAY(o->stream_maps, o->nb_stream_maps);
+                m = &o->stream_maps[o->nb_stream_maps - 1];
+
+                m->file_index   = file_idx;
+                m->stream_index = i;
+
+                if (sync_file_idx >= 0) {
+                    m->sync_file_index   = sync_file_idx;
+                    m->sync_stream_index = sync_stream_idx;
+                } else {
+                    m->sync_file_index   = file_idx;
+                    m->sync_stream_index = i;
+                }
+            }
+    }
+
+    if (!m) {
+        av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n", arg);
+        exit_program(1);
+    }
+
+    av_freep(&map);
+    return 0;
+}
+
+static int opt_attach(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    GROW_ARRAY(o->attachments, o->nb_attachments);
+    o->attachments[o->nb_attachments - 1] = arg;
+    return 0;
+}
+
+#if CONFIG_VAAPI
+static int opt_vaapi_device(void *optctx, const char *opt, const char *arg)
+{
+    int err;
+    err = vaapi_device_init(arg);
+    if (err < 0)
+        exit_program(1);
+    return 0;
+}
+#endif
+
+/**
+ * Parse a metadata specifier passed as 'arg' parameter.
+ * @param arg  metadata string to parse
+ * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
+ * @param index for type c/p, chapter/program index is written here
+ * @param stream_spec for type s, the stream specifier is written here
+ */
+static void parse_meta_type(char *arg, char *type, int *index, const char **stream_spec)
+{
+    if (*arg) {
+        *type = *arg;
+        switch (*arg) {
+        case 'g':
+            break;
+        case 's':
+            if (*(++arg) && *arg != ':') {
+                av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", arg);
+                exit_program(1);
+            }
+            *stream_spec = *arg == ':' ? arg + 1 : "";
+            break;
+        case 'c':
+        case 'p':
+            if (*(++arg) == ':')
+                *index = strtol(++arg, NULL, 0);
+            break;
+        default:
+            av_log(NULL, AV_LOG_FATAL, "Invalid metadata type %c.\n", *arg);
+            exit_program(1);
+        }
+    } else
+        *type = 'g';
+}
+
+static int copy_metadata(char *outspec, char *inspec, AVFormatContext *oc, AVFormatContext *ic, OptionsContext *o)
+{
+    AVDictionary **meta_in = NULL;
+    AVDictionary **meta_out;
+    int i, ret = 0;
+    char type_in, type_out;
+    const char *istream_spec = NULL, *ostream_spec = NULL;
+    int idx_in = 0, idx_out = 0;
+
+    parse_meta_type(inspec,  &type_in,  &idx_in,  &istream_spec);
+    parse_meta_type(outspec, &type_out, &idx_out, &ostream_spec);
+
+    if (type_in == 'g' || type_out == 'g')
+        o->metadata_global_manual = 1;
+    if (type_in == 's' || type_out == 's')
+        o->metadata_streams_manual = 1;
+    if (type_in == 'c' || type_out == 'c')
+        o->metadata_chapters_manual = 1;
+
+    /* ic is NULL when just disabling automatic mappings */
+    if (!ic)
+        return 0;
+
+#define METADATA_CHECK_INDEX(index, nb_elems, desc)\
+    if ((index) < 0 || (index) >= (nb_elems)) {\
+        av_log(NULL, AV_LOG_FATAL, "Invalid %s index %d while processing metadata maps.\n",\
+                (desc), (index));\
+        exit_program(1);\
+    }
+
+#define SET_DICT(type, meta, context, index)\
+        switch (type) {\
+        case 'g':\
+            meta = &context->metadata;\
+            break;\
+        case 'c':\
+            METADATA_CHECK_INDEX(index, context->nb_chapters, "chapter")\
+            meta = &context->chapters[index]->metadata;\
+            break;\
+        case 'p':\
+            METADATA_CHECK_INDEX(index, context->nb_programs, "program")\
+            meta = &context->programs[index]->metadata;\
+            break;\
+        case 's':\
+            break; /* handled separately below */ \
+        default: av_assert0(0);\
+        }\
+
+    SET_DICT(type_in, meta_in, ic, idx_in);
+    SET_DICT(type_out, meta_out, oc, idx_out);
+
+    /* for input streams choose first matching stream */
+    if (type_in == 's') {
+        for (i = 0; i < ic->nb_streams; i++) {
+            if ((ret = check_stream_specifier(ic, ic->streams[i], istream_spec)) > 0) {
+                meta_in = &ic->streams[i]->metadata;
+                break;
+            } else if (ret < 0)
+                exit_program(1);
+        }
+        if (!meta_in) {
+            av_log(NULL, AV_LOG_FATAL, "Stream specifier %s does not match  any streams.\n", istream_spec);
+            exit_program(1);
+        }
+    }
+
+    if (type_out == 's') {
+        for (i = 0; i < oc->nb_streams; i++) {
+            if ((ret = check_stream_specifier(oc, oc->streams[i], ostream_spec)) > 0) {
+                meta_out = &oc->streams[i]->metadata;
+                av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
+            } else if (ret < 0)
+                exit_program(1);
+        }
+    } else
+        av_dict_copy(meta_out, *meta_in, AV_DICT_DONT_OVERWRITE);
+
+    return 0;
+}
+
+static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
+{
+    const AVCodecDescriptor *desc;
+    const char *codec_string = encoder ? "encoder" : "decoder";
+    AVCodec *codec;
+
+    codec = encoder ?
+        avcodec_find_encoder_by_name(name) :
+        avcodec_find_decoder_by_name(name);
+
+    if (!codec && (desc = avcodec_descriptor_get_by_name(name))) {
+        codec = encoder ? avcodec_find_encoder(desc->id) :
+                          avcodec_find_decoder(desc->id);
+        if (codec)
+            av_log(NULL, AV_LOG_VERBOSE, "Matched %s '%s' for codec '%s'.\n",
+                   codec_string, codec->name, desc->name);
+    }
+
+    if (!codec) {
+        av_log(NULL, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
+        exit_program(1);
+    }
+    if (codec->type != type) {
+        av_log(NULL, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
+        exit_program(1);
+    }
+    return codec;
+}
+
+static AVCodec *choose_decoder(OptionsContext *o, AVFormatContext *s, AVStream *st)
+{
+    char *codec_name = NULL;
+
+    MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
+    if (codec_name) {
+        AVCodec *codec = find_codec_or_die(codec_name, st->codecpar->codec_type, 0);
+        st->codecpar->codec_id = codec->id;
+        return codec;
+    } else
+        return avcodec_find_decoder(st->codecpar->codec_id);
+}
+
+/* Add all the streams from the given input file to the global
+ * list of input streams. */
+static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
+{
+    int i, ret;
+
+    for (i = 0; i < ic->nb_streams; i++) {
+        AVStream *st = ic->streams[i];
+        AVCodecParameters *par = st->codecpar;
+        InputStream *ist = av_mallocz(sizeof(*ist));
+        char *framerate = NULL, *hwaccel = NULL, *hwaccel_device = NULL;
+        char *hwaccel_output_format = NULL;
+        char *codec_tag = NULL;
+        char *next;
+
+        if (!ist)
+            exit_program(1);
+
+        GROW_ARRAY(input_streams, nb_input_streams);
+        input_streams[nb_input_streams - 1] = ist;
+
+        ist->st = st;
+        ist->file_index = nb_input_files;
+        ist->discard = 1;
+        st->discard  = AVDISCARD_ALL;
+        ist->nb_samples = 0;
+        ist->min_pts = INT64_MAX;
+        ist->max_pts = INT64_MIN;
+
+        ist->ts_scale = 1.0;
+        MATCH_PER_STREAM_OPT(ts_scale, dbl, ist->ts_scale, ic, st);
+
+        ist->autorotate = 1;
+        MATCH_PER_STREAM_OPT(autorotate, i, ist->autorotate, ic, st);
+
+        MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, ic, st);
+        if (codec_tag) {
+            uint32_t tag = strtol(codec_tag, &next, 0);
+            if (*next)
+                tag = AV_RL32(codec_tag);
+            st->codecpar->codec_tag = tag;
+        }
+
+        ist->dec = choose_decoder(o, ic, st);
+        ist->decoder_opts = filter_codec_opts(o->g->codec_opts, par->codec_id, ic, st, ist->dec);
+
+        ist->dec_ctx = avcodec_alloc_context3(ist->dec);
+        if (!ist->dec_ctx) {
+            av_log(NULL, AV_LOG_ERROR, "Error allocating the decoder context.\n");
+            exit_program(1);
+        }
+
+        ret = avcodec_parameters_to_context(ist->dec_ctx, par);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing the decoder context.\n");
+            exit_program(1);
+        }
+
+        switch (par->codec_type) {
+        case AVMEDIA_TYPE_VIDEO:
+            MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
+            if (framerate && av_parse_video_rate(&ist->framerate,
+                                                 framerate) < 0) {
+                av_log(NULL, AV_LOG_ERROR, "Error parsing framerate %s.\n",
+                       framerate);
+                exit_program(1);
+            }
+
+            MATCH_PER_STREAM_OPT(hwaccels, str, hwaccel, ic, st);
+            if (hwaccel) {
+                if (!strcmp(hwaccel, "none"))
+                    ist->hwaccel_id = HWACCEL_NONE;
+                else if (!strcmp(hwaccel, "auto"))
+                    ist->hwaccel_id = HWACCEL_AUTO;
+                else {
+                    int i;
+                    for (i = 0; hwaccels[i].name; i++) {
+                        if (!strcmp(hwaccels[i].name, hwaccel)) {
+                            ist->hwaccel_id = hwaccels[i].id;
+                            break;
+                        }
+                    }
+
+                    if (!ist->hwaccel_id) {
+                        av_log(NULL, AV_LOG_FATAL, "Unrecognized hwaccel: %s.\n",
+                               hwaccel);
+                        av_log(NULL, AV_LOG_FATAL, "Supported hwaccels: ");
+                        for (i = 0; hwaccels[i].name; i++)
+                            av_log(NULL, AV_LOG_FATAL, "%s ", hwaccels[i].name);
+                        av_log(NULL, AV_LOG_FATAL, "\n");
+                        exit_program(1);
+                    }
+                }
+            }
+
+            MATCH_PER_STREAM_OPT(hwaccel_devices, str, hwaccel_device, ic, st);
+            if (hwaccel_device) {
+                ist->hwaccel_device = av_strdup(hwaccel_device);
+                if (!ist->hwaccel_device)
+                    exit_program(1);
+            }
+
+            MATCH_PER_STREAM_OPT(hwaccel_output_formats, str,
+                                 hwaccel_output_format, ic, st);
+            if (hwaccel_output_format) {
+                ist->hwaccel_output_format = av_get_pix_fmt(hwaccel_output_format);
+                if (ist->hwaccel_output_format == AV_PIX_FMT_NONE) {
+                    av_log(NULL, AV_LOG_FATAL, "Unrecognised hwaccel output "
+                           "format: %s", hwaccel_output_format);
+                }
+            } else {
+                ist->hwaccel_output_format = AV_PIX_FMT_NONE;
+            }
+
+            ist->hwaccel_pix_fmt = AV_PIX_FMT_NONE;
+
+            break;
+        case AVMEDIA_TYPE_AUDIO:
+            guess_input_channel_layout(ist);
+            break;
+        case AVMEDIA_TYPE_DATA:
+        case AVMEDIA_TYPE_SUBTITLE:
+        case AVMEDIA_TYPE_ATTACHMENT:
+        case AVMEDIA_TYPE_UNKNOWN:
+            break;
+        default:
+            abort();
+        }
+    }
+}
+
+static void assert_file_overwrite(const char *filename)
+{
+    if (file_overwrite && file_skip) {
+        fprintf(stderr, "Error, both -y and -n supplied. Exiting.\n");
+        exit_program(1);
+    }
+
+    if (!file_overwrite &&
+        (!strchr(filename, ':') || filename[1] == ':' ||
+         av_strstart(filename, "file:", NULL))) {
+        if (avio_check(filename, 0) == 0) {
+            if (!using_stdin && !file_skip) {
+                fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
+                fflush(stderr);
+                if (!read_yesno()) {
+                    fprintf(stderr, "Not overwriting - exiting\n");
+                    exit_program(1);
+                }
+            }
+            else {
+                fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
+                exit_program(1);
+            }
+        }
+    }
+}
+
+static void dump_attachment(AVStream *st, const char *filename)
+{
+    int ret;
+    AVIOContext *out = NULL;
+    AVDictionaryEntry *e;
+
+    if (!st->codecpar->extradata_size) {
+        av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
+               nb_input_files - 1, st->index);
+        return;
+    }
+    if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
+        filename = e->value;
+    if (!*filename) {
+        av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
+               "in stream #%d:%d.\n", nb_input_files - 1, st->index);
+        exit_program(1);
+    }
+
+    assert_file_overwrite(filename);
+
+    if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
+               filename);
+        exit_program(1);
+    }
+
+    avio_write(out, st->codecpar->extradata, st->codecpar->extradata_size);
+    avio_flush(out);
+    avio_close(out);
+}
+
+static int open_input_file(OptionsContext *o, const char *filename)
+{
+    InputFile *f;
+    AVFormatContext *ic;
+    AVInputFormat *file_iformat = NULL;
+    int err, i, ret;
+    int64_t timestamp;
+    uint8_t buf[128];
+    AVDictionary **opts;
+    AVDictionary *unused_opts = NULL;
+    AVDictionaryEntry *e = NULL;
+    int orig_nb_streams;                     // number of streams before avformat_find_stream_info
+
+    if (o->format) {
+        if (!(file_iformat = av_find_input_format(o->format))) {
+            av_log(NULL, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
+            exit_program(1);
+        }
+    }
+
+    if (!strcmp(filename, "-"))
+        filename = "pipe:";
+
+    using_stdin |= !strncmp(filename, "pipe:", 5) ||
+                    !strcmp(filename, "/dev/stdin");
+
+    /* get default parameters from command line */
+    ic = avformat_alloc_context();
+    if (!ic) {
+        print_error(filename, AVERROR(ENOMEM));
+        exit_program(1);
+    }
+    if (o->nb_audio_sample_rate) {
+        snprintf(buf, sizeof(buf), "%d", o->audio_sample_rate[o->nb_audio_sample_rate - 1].u.i);
+        av_dict_set(&o->g->format_opts, "sample_rate", buf, 0);
+    }
+    if (o->nb_audio_channels) {
+        /* because we set audio_channels based on both the "ac" and
+         * "channel_layout" options, we need to check that the specified
+         * demuxer actually has the "channels" option before setting it */
+        if (file_iformat && file_iformat->priv_class &&
+            av_opt_find(&file_iformat->priv_class, "channels", NULL, 0,
+                        AV_OPT_SEARCH_FAKE_OBJ)) {
+            snprintf(buf, sizeof(buf), "%d",
+                     o->audio_channels[o->nb_audio_channels - 1].u.i);
+            av_dict_set(&o->g->format_opts, "channels", buf, 0);
+        }
+    }
+    if (o->nb_frame_rates) {
+        /* set the format-level framerate option;
+         * this is important for video grabbers, e.g. x11 */
+        if (file_iformat && file_iformat->priv_class &&
+            av_opt_find(&file_iformat->priv_class, "framerate", NULL, 0,
+                        AV_OPT_SEARCH_FAKE_OBJ)) {
+            av_dict_set(&o->g->format_opts, "framerate",
+                        o->frame_rates[o->nb_frame_rates - 1].u.str, 0);
+        }
+    }
+    if (o->nb_frame_sizes) {
+        av_dict_set(&o->g->format_opts, "video_size", o->frame_sizes[o->nb_frame_sizes - 1].u.str, 0);
+    }
+    if (o->nb_frame_pix_fmts)
+        av_dict_set(&o->g->format_opts, "pixel_format", o->frame_pix_fmts[o->nb_frame_pix_fmts - 1].u.str, 0);
+
+    ic->flags |= AVFMT_FLAG_NONBLOCK;
+    ic->interrupt_callback = int_cb;
+
+    /* open the input file with generic Libav function */
+    err = avformat_open_input(&ic, filename, file_iformat, &o->g->format_opts);
+    if (err < 0) {
+        print_error(filename, err);
+        exit_program(1);
+    }
+    assert_avoptions(o->g->format_opts);
+
+    /* apply forced codec ids */
+    for (i = 0; i < ic->nb_streams; i++)
+        choose_decoder(o, ic, ic->streams[i]);
+
+    /* Set AVCodecContext options for avformat_find_stream_info */
+    opts = setup_find_stream_info_opts(ic, o->g->codec_opts);
+    orig_nb_streams = ic->nb_streams;
+
+    /* If not enough info to get the stream parameters, we decode the
+       first frames to get it. (used in mpeg case for example) */
+    ret = avformat_find_stream_info(ic, opts);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "%s: could not find codec parameters\n", filename);
+        avformat_close_input(&ic);
+        exit_program(1);
+    }
+
+    timestamp = (o->start_time == AV_NOPTS_VALUE) ? 0 : o->start_time;
+    /* add the stream start time */
+    if (ic->start_time != AV_NOPTS_VALUE)
+        timestamp += ic->start_time;
+
+    /* if seeking requested, we execute it */
+    if (o->start_time != AV_NOPTS_VALUE) {
+        ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
+                   filename, (double)timestamp / AV_TIME_BASE);
+        }
+    }
+
+    /* update the current parameters so that they match the one of the input stream */
+    add_input_streams(o, ic);
+
+    /* dump the file content */
+    av_dump_format(ic, nb_input_files, filename, 0);
+
+    GROW_ARRAY(input_files, nb_input_files);
+    f = av_mallocz(sizeof(*f));
+    if (!f)
+        exit_program(1);
+    input_files[nb_input_files - 1] = f;
+
+    f->ctx        = ic;
+    f->ist_index  = nb_input_streams - ic->nb_streams;
+    f->start_time = o->start_time;
+    f->recording_time = o->recording_time;
+    f->ts_offset  = o->input_ts_offset - (copy_ts ? 0 : timestamp);
+    f->nb_streams = ic->nb_streams;
+    f->rate_emu   = o->rate_emu;
+    f->accurate_seek = o->accurate_seek;
+    f->loop = o->loop;
+    f->duration = 0;
+    f->time_base = (AVRational){ 1, 1 };
+
+    /* check if all codec options have been used */
+    unused_opts = strip_specifiers(o->g->codec_opts);
+    for (i = f->ist_index; i < nb_input_streams; i++) {
+        e = NULL;
+        while ((e = av_dict_get(input_streams[i]->decoder_opts, "", e,
+                                AV_DICT_IGNORE_SUFFIX)))
+            av_dict_set(&unused_opts, e->key, NULL, 0);
+    }
+
+    e = NULL;
+    while ((e = av_dict_get(unused_opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
+        const AVClass *class = avcodec_get_class();
+        const AVOption *option = av_opt_find(&class, e->key, NULL, 0,
+                                             AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ);
+        if (!option)
+            continue;
+        if (!(option->flags & AV_OPT_FLAG_DECODING_PARAM)) {
+            av_log(NULL, AV_LOG_ERROR, "Codec AVOption %s (%s) specified for "
+                   "input file #%d (%s) is not a decoding option.\n", e->key,
+                   option->help ? option->help : "", nb_input_files - 1,
+                   filename);
+            exit_program(1);
+        }
+
+        av_log(NULL, AV_LOG_WARNING, "Codec AVOption %s (%s) specified for "
+               "input file #%d (%s) has not been used for any stream. The most "
+               "likely reason is either wrong type (e.g. a video option with "
+               "no video streams) or that it is a private option of some decoder "
+               "which was not actually used for any stream.\n", e->key,
+               option->help ? option->help : "", nb_input_files - 1, filename);
+    }
+    av_dict_free(&unused_opts);
+
+    for (i = 0; i < o->nb_dump_attachment; i++) {
+        int j;
+
+        for (j = 0; j < ic->nb_streams; j++) {
+            AVStream *st = ic->streams[j];
+
+            if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
+                dump_attachment(st, o->dump_attachment[i].u.str);
+        }
+    }
+
+    for (i = 0; i < orig_nb_streams; i++)
+        av_dict_free(&opts[i]);
+    av_freep(&opts);
+
+    return 0;
+}
+
+static uint8_t *get_line(AVIOContext *s)
+{
+    AVIOContext *line;
+    uint8_t *buf;
+    char c;
+
+    if (avio_open_dyn_buf(&line) < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Could not alloc buffer for reading preset.\n");
+        exit_program(1);
+    }
+
+    while ((c = avio_r8(s)) && c != '\n')
+        avio_w8(line, c);
+    avio_w8(line, 0);
+    avio_close_dyn_buf(line, &buf);
+
+    return buf;
+}
+
+static int get_preset_file_2(const char *preset_name, const char *codec_name, AVIOContext **s)
+{
+    int i, ret = -1;
+    char filename[1000];
+    const char *base[3] = { getenv("AVCONV_DATADIR"),
+                            getenv("HOME"),
+                            AVCONV_DATADIR,
+                            };
+
+    for (i = 0; i < FF_ARRAY_ELEMS(base) && ret < 0; i++) {
+        if (!base[i])
+            continue;
+        if (codec_name) {
+            snprintf(filename, sizeof(filename), "%s%s/%s-%s.avpreset", base[i],
+                     i != 1 ? "" : "/.avconv", codec_name, preset_name);
+            ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
+        }
+        if (ret < 0) {
+            snprintf(filename, sizeof(filename), "%s%s/%s.avpreset", base[i],
+                     i != 1 ? "" : "/.avconv", preset_name);
+            ret = avio_open2(s, filename, AVIO_FLAG_READ, &int_cb, NULL);
+        }
+    }
+    return ret;
+}
+
+static int choose_encoder(OptionsContext *o, AVFormatContext *s, OutputStream *ost)
+{
+    enum AVMediaType type = ost->st->codecpar->codec_type;
+    char *codec_name = NULL;
+
+    if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
+        MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, ost->st);
+        if (!codec_name) {
+            ost->st->codecpar->codec_id = av_guess_codec(s->oformat, NULL, s->filename,
+                                                         NULL, ost->st->codecpar->codec_type);
+            ost->enc = avcodec_find_encoder(ost->st->codecpar->codec_id);
+            if (!ost->enc) {
+                av_log(NULL, AV_LOG_FATAL, "Automatic encoder selection failed for "
+                       "output stream #%d:%d. Default encoder for format %s is "
+                       "probably disabled. Please choose an encoder manually.\n",
+                       ost->file_index, ost->index, s->oformat->name);
+                return AVERROR_ENCODER_NOT_FOUND;
+            }
+        } else if (!strcmp(codec_name, "copy"))
+            ost->stream_copy = 1;
+        else {
+            ost->enc = find_codec_or_die(codec_name, ost->st->codecpar->codec_type, 1);
+            ost->st->codecpar->codec_id = ost->enc->id;
+        }
+
+        ost->encoding_needed = !ost->stream_copy;
+    } else {
+        /* no encoding supported for other media types */
+        ost->stream_copy     = 1;
+        ost->encoding_needed = 0;
+    }
+
+    return 0;
+}
+
+static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, enum AVMediaType type)
+{
+    OutputStream *ost;
+    AVStream *st = avformat_new_stream(oc, NULL);
+    int idx      = oc->nb_streams - 1, ret = 0;
+    const char *bsfs = NULL;
+    char *next, *codec_tag = NULL;
+    double qscale = -1;
+    int bitrate = 0;
+
+    if (!st) {
+        av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
+        exit_program(1);
+    }
+
+    if (oc->nb_streams - 1 < o->nb_streamid_map)
+        st->id = o->streamid_map[oc->nb_streams - 1];
+
+    GROW_ARRAY(output_streams, nb_output_streams);
+    if (!(ost = av_mallocz(sizeof(*ost))))
+        exit_program(1);
+    output_streams[nb_output_streams - 1] = ost;
+
+    ost->file_index = nb_output_files - 1;
+    ost->index      = idx;
+    ost->st         = st;
+    st->codecpar->codec_type = type;
+
+    ret = choose_encoder(o, oc, ost);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error selecting an encoder for stream "
+               "%d:%d\n", ost->file_index, ost->index);
+        exit_program(1);
+    }
+
+    ost->enc_ctx = avcodec_alloc_context3(ost->enc);
+    if (!ost->enc_ctx) {
+        av_log(NULL, AV_LOG_ERROR, "Error allocating the encoding context.\n");
+        exit_program(1);
+    }
+    ost->enc_ctx->codec_type = type;
+
+    if (ost->enc) {
+        AVIOContext *s = NULL;
+        char *buf = NULL, *arg = NULL, *preset = NULL;
+
+        ost->encoder_opts  = filter_codec_opts(o->g->codec_opts, ost->enc->id, oc, st, ost->enc);
+
+        MATCH_PER_STREAM_OPT(presets, str, preset, oc, st);
+        if (preset && (!(ret = get_preset_file_2(preset, ost->enc->name, &s)))) {
+            do  {
+                buf = get_line(s);
+                if (!buf[0] || buf[0] == '#') {
+                    av_free(buf);
+                    continue;
+                }
+                if (!(arg = strchr(buf, '='))) {
+                    av_log(NULL, AV_LOG_FATAL, "Invalid line found in the preset file.\n");
+                    exit_program(1);
+                }
+                *arg++ = 0;
+                av_dict_set(&ost->encoder_opts, buf, arg, AV_DICT_DONT_OVERWRITE);
+                av_free(buf);
+            } while (!s->eof_reached);
+            avio_close(s);
+        }
+        if (ret) {
+            av_log(NULL, AV_LOG_FATAL,
+                   "Preset %s specified for stream %d:%d, but could not be opened.\n",
+                   preset, ost->file_index, ost->index);
+            exit_program(1);
+        }
+    } else {
+        ost->encoder_opts = filter_codec_opts(o->g->codec_opts, AV_CODEC_ID_NONE, oc, st, NULL);
+    }
+
+    ost->max_frames = INT64_MAX;
+    MATCH_PER_STREAM_OPT(max_frames, i64, ost->max_frames, oc, st);
+
+    MATCH_PER_STREAM_OPT(bitstream_filters, str, bsfs, oc, st);
+    while (bsfs && *bsfs) {
+        const AVBitStreamFilter *filter;
+        const char *bsf, *bsf_options_str, *bsf_name;
+        AVDictionary *bsf_options = NULL;
+
+        bsf = bsf_options_str = av_get_token(&bsfs, ",");
+        if (!bsf)
+            exit_program(1);
+        bsf_name = av_get_token(&bsf_options_str, "=");
+        if (!bsf_name)
+            exit_program(1);
+
+        filter = av_bsf_get_by_name(bsf_name);
+        if (!filter) {
+            av_log(NULL, AV_LOG_FATAL, "Unknown bitstream filter %s\n", bsf_name);
+            exit_program(1);
+        }
+        if (*bsf_options_str++) {
+            ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
+            if (ret < 0) {
+                av_log(NULL, AV_LOG_ERROR, "Error parsing options for bitstream filter %s\n", bsf_name);
+                exit_program(1);
+            }
+        }
+        av_freep(&bsf);
+
+        ost->bsf_ctx = av_realloc_array(ost->bsf_ctx,
+                                        ost->nb_bitstream_filters + 1,
+                                        sizeof(*ost->bsf_ctx));
+        if (!ost->bsf_ctx)
+            exit_program(1);
+
+        ret = av_bsf_alloc(filter, &ost->bsf_ctx[ost->nb_bitstream_filters]);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error allocating a bistream filter context\n");
+            exit_program(1);
+        }
+        ost->nb_bitstream_filters++;
+
+        if (bsf_options) {
+            ret = av_opt_set_dict(ost->bsf_ctx[ost->nb_bitstream_filters-1]->priv_data, &bsf_options);
+            if (ret < 0) {
+                av_log(NULL, AV_LOG_ERROR, "Error setting options for bitstream filter %s\n", bsf_name);
+                exit_program(1);
+            }
+            assert_avoptions(bsf_options);
+            av_dict_free(&bsf_options);
+        }
+        av_freep(&bsf_name);
+
+        if (*bsfs)
+            bsfs++;
+    }
+
+    MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, oc, st);
+    if (codec_tag) {
+        uint32_t tag = strtol(codec_tag, &next, 0);
+        if (*next)
+            tag = AV_RL32(codec_tag);
+        ost->enc_ctx->codec_tag = tag;
+    }
+
+    MATCH_PER_STREAM_OPT(qscale, dbl, qscale, oc, st);
+    if (qscale >= 0) {
+        ost->enc_ctx->flags |= AV_CODEC_FLAG_QSCALE;
+        ost->enc_ctx->global_quality = FF_QP2LAMBDA * qscale;
+    }
+
+    MATCH_PER_STREAM_OPT(bitrates, i, bitrate, oc, st);
+    if (bitrate > 0) {
+        if (ost->stream_copy)
+            ost->bitrate_override = bitrate;
+        else
+            ost->enc_ctx->bit_rate = bitrate;
+    }
+
+    ost->max_muxing_queue_size = 128;
+    MATCH_PER_STREAM_OPT(max_muxing_queue_size, i, ost->max_muxing_queue_size, oc, st);
+    ost->max_muxing_queue_size *= sizeof(AVPacket);
+
+    if (oc->oformat->flags & AVFMT_GLOBALHEADER)
+        ost->enc_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
+
+    av_opt_get_int(o->g->sws_opts, "sws_flags", 0, &ost->sws_flags);
+
+    av_dict_copy(&ost->resample_opts, o->g->resample_opts, 0);
+
+    ost->pix_fmts[0] = ost->pix_fmts[1] = AV_PIX_FMT_NONE;
+    ost->last_mux_dts = AV_NOPTS_VALUE;
+
+    ost->muxing_queue = av_fifo_alloc(8 * sizeof(AVPacket));
+    if (!ost->muxing_queue)
+        exit_program(1);
+
+    return ost;
+}
+
+static void parse_matrix_coeffs(uint16_t *dest, const char *str)
+{
+    int i;
+    const char *p = str;
+    for (i = 0;; i++) {
+        dest[i] = atoi(p);
+        if (i == 63)
+            break;
+        p = strchr(p, ',');
+        if (!p) {
+            av_log(NULL, AV_LOG_FATAL, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
+            exit_program(1);
+        }
+        p++;
+    }
+}
+
+/* read file contents into a string */
+static uint8_t *read_file(const char *filename)
+{
+    AVIOContext *pb      = NULL;
+    AVIOContext *dyn_buf = NULL;
+    int ret = avio_open(&pb, filename, AVIO_FLAG_READ);
+    uint8_t buf[1024], *str;
+
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Error opening file %s.\n", filename);
+        return NULL;
+    }
+
+    ret = avio_open_dyn_buf(&dyn_buf);
+    if (ret < 0) {
+        avio_closep(&pb);
+        return NULL;
+    }
+    while ((ret = avio_read(pb, buf, sizeof(buf))) > 0)
+        avio_write(dyn_buf, buf, ret);
+    avio_w8(dyn_buf, 0);
+    avio_closep(&pb);
+
+    ret = avio_close_dyn_buf(dyn_buf, &str);
+    if (ret < 0)
+        return NULL;
+    return str;
+}
+
+static char *get_ost_filters(OptionsContext *o, AVFormatContext *oc,
+                             OutputStream *ost)
+{
+    AVStream *st = ost->st;
+    char *filter = NULL, *filter_script = NULL;
+
+    MATCH_PER_STREAM_OPT(filter_scripts, str, filter_script, oc, st);
+    MATCH_PER_STREAM_OPT(filters, str, filter, oc, st);
+
+    if (filter_script && filter) {
+        av_log(NULL, AV_LOG_ERROR, "Both -filter and -filter_script set for "
+               "output stream #%d:%d.\n", nb_output_files, st->index);
+        exit_program(1);
+    }
+
+    if (filter_script)
+        return read_file(filter_script);
+    else if (filter)
+        return av_strdup(filter);
+
+    return av_strdup(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ?
+                     "null" : "anull");
+}
+
+static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
+{
+    AVStream *st;
+    OutputStream *ost;
+    AVCodecContext *video_enc;
+    char *frame_aspect_ratio = NULL;
+
+    ost = new_output_stream(o, oc, AVMEDIA_TYPE_VIDEO);
+    st  = ost->st;
+    video_enc = ost->enc_ctx;
+
+    MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
+    if (frame_aspect_ratio)
+        ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
+
+    if (!ost->stream_copy) {
+        const char *p = NULL;
+        char *frame_rate = NULL, *frame_size = NULL;
+        char *frame_pix_fmt = NULL;
+        char *intra_matrix = NULL, *inter_matrix = NULL;
+        int do_pass = 0;
+        int i;
+
+        MATCH_PER_STREAM_OPT(frame_rates, str, frame_rate, oc, st);
+        if (frame_rate && av_parse_video_rate(&ost->frame_rate, frame_rate) < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid framerate value: %s\n", frame_rate);
+            exit_program(1);
+        }
+
+        MATCH_PER_STREAM_OPT(frame_sizes, str, frame_size, oc, st);
+        if (frame_size && av_parse_video_size(&video_enc->width, &video_enc->height, frame_size) < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid frame size: %s.\n", frame_size);
+            exit_program(1);
+        }
+
+        MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
+        if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == AV_PIX_FMT_NONE) {
+            av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);
+            exit_program(1);
+        }
+        st->sample_aspect_ratio = video_enc->sample_aspect_ratio;
+
+        MATCH_PER_STREAM_OPT(intra_matrices, str, intra_matrix, oc, st);
+        if (intra_matrix) {
+            if (!(video_enc->intra_matrix = av_mallocz(sizeof(*video_enc->intra_matrix) * 64))) {
+                av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for intra matrix.\n");
+                exit_program(1);
+            }
+            parse_matrix_coeffs(video_enc->intra_matrix, intra_matrix);
+        }
+        MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);
+        if (inter_matrix) {
+            if (!(video_enc->inter_matrix = av_mallocz(sizeof(*video_enc->inter_matrix) * 64))) {
+                av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for inter matrix.\n");
+                exit_program(1);
+            }
+            parse_matrix_coeffs(video_enc->inter_matrix, inter_matrix);
+        }
+
+        MATCH_PER_STREAM_OPT(rc_overrides, str, p, oc, st);
+        for (i = 0; p; i++) {
+            int start, end, q;
+            int e = sscanf(p, "%d,%d,%d", &start, &end, &q);
+            if (e != 3) {
+                av_log(NULL, AV_LOG_FATAL, "error parsing rc_override\n");
+                exit_program(1);
+            }
+            video_enc->rc_override =
+                av_realloc(video_enc->rc_override,
+                           sizeof(RcOverride) * (i + 1));
+            if (!video_enc->rc_override) {
+                av_log(NULL, AV_LOG_FATAL, "Could not (re)allocate memory for rc_override.\n");
+                exit_program(1);
+            }
+            video_enc->rc_override[i].start_frame = start;
+            video_enc->rc_override[i].end_frame   = end;
+            if (q > 0) {
+                video_enc->rc_override[i].qscale         = q;
+                video_enc->rc_override[i].quality_factor = 1.0;
+            }
+            else {
+                video_enc->rc_override[i].qscale         = 0;
+                video_enc->rc_override[i].quality_factor = -q/100.0;
+            }
+            p = strchr(p, '/');
+            if (p) p++;
+        }
+        video_enc->rc_override_count = i;
+        video_enc->intra_dc_precision = intra_dc_precision - 8;
+
+        /* two pass mode */
+        MATCH_PER_STREAM_OPT(pass, i, do_pass, oc, st);
+        if (do_pass) {
+            if (do_pass == 1) {
+                video_enc->flags |= AV_CODEC_FLAG_PASS1;
+            } else {
+                video_enc->flags |= AV_CODEC_FLAG_PASS2;
+            }
+        }
+
+        MATCH_PER_STREAM_OPT(passlogfiles, str, ost->logfile_prefix, oc, st);
+        if (ost->logfile_prefix &&
+            !(ost->logfile_prefix = av_strdup(ost->logfile_prefix)))
+            exit_program(1);
+
+        if (do_pass) {
+            char logfilename[1024];
+            FILE *f;
+
+            snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
+                     ost->logfile_prefix ? ost->logfile_prefix :
+                                           DEFAULT_PASS_LOGFILENAME_PREFIX,
+                     i);
+            if (!strcmp(ost->enc->name, "libx264")) {
+                av_dict_set(&ost->encoder_opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
+            } else {
+                if (video_enc->flags & AV_CODEC_FLAG_PASS1) {
+                    f = fopen(logfilename, "wb");
+                    if (!f) {
+                        av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
+                               logfilename, strerror(errno));
+                        exit_program(1);
+                    }
+                    ost->logfile = f;
+                } else {
+                    char  *logbuffer = read_file(logfilename);
+
+                    if (!logbuffer) {
+                        av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
+                               logfilename);
+                        exit_program(1);
+                    }
+                    video_enc->stats_in = logbuffer;
+                }
+            }
+        }
+
+        MATCH_PER_STREAM_OPT(forced_key_frames, str, ost->forced_keyframes, oc, st);
+        if (ost->forced_keyframes)
+            ost->forced_keyframes = av_strdup(ost->forced_keyframes);
+
+        MATCH_PER_STREAM_OPT(force_fps, i, ost->force_fps, oc, st);
+
+        ost->top_field_first = -1;
+        MATCH_PER_STREAM_OPT(top_field_first, i, ost->top_field_first, oc, st);
+
+
+        ost->avfilter = get_ost_filters(o, oc, ost);
+        if (!ost->avfilter)
+            exit_program(1);
+    } else {
+        MATCH_PER_STREAM_OPT(copy_initial_nonkeyframes, i, ost->copy_initial_nonkeyframes, oc ,st);
+    }
+
+    return ost;
+}
+
+static OutputStream *new_audio_stream(OptionsContext *o, AVFormatContext *oc)
+{
+    AVStream *st;
+    OutputStream *ost;
+    AVCodecContext *audio_enc;
+
+    ost = new_output_stream(o, oc, AVMEDIA_TYPE_AUDIO);
+    st  = ost->st;
+
+    audio_enc = ost->enc_ctx;
+    audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;
+
+    if (!ost->stream_copy) {
+        char *sample_fmt = NULL;
+
+        MATCH_PER_STREAM_OPT(audio_channels, i, audio_enc->channels, oc, st);
+
+        MATCH_PER_STREAM_OPT(sample_fmts, str, sample_fmt, oc, st);
+        if (sample_fmt &&
+            (audio_enc->sample_fmt = av_get_sample_fmt(sample_fmt)) == AV_SAMPLE_FMT_NONE) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid sample format '%s'\n", sample_fmt);
+            exit_program(1);
+        }
+
+        MATCH_PER_STREAM_OPT(audio_sample_rate, i, audio_enc->sample_rate, oc, st);
+
+        ost->avfilter = get_ost_filters(o, oc, ost);
+        if (!ost->avfilter)
+            exit_program(1);
+    }
+
+    return ost;
+}
+
+static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
+{
+    OutputStream *ost;
+
+    ost = new_output_stream(o, oc, AVMEDIA_TYPE_DATA);
+    if (!ost->stream_copy) {
+        av_log(NULL, AV_LOG_FATAL, "Data stream encoding not supported yet (only streamcopy)\n");
+        exit_program(1);
+    }
+
+    return ost;
+}
+
+static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
+{
+    OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
+    ost->stream_copy = 1;
+    ost->finished    = 1;
+    return ost;
+}
+
+static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
+{
+    OutputStream *ost;
+    AVCodecContext *subtitle_enc;
+
+    ost = new_output_stream(o, oc, AVMEDIA_TYPE_SUBTITLE);
+    subtitle_enc = ost->enc_ctx;
+
+    subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;
+
+    return ost;
+}
+
+/* arg format is "output-stream-index:streamid-value". */
+static int opt_streamid(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    int idx;
+    char *p;
+    char idx_str[16];
+
+    av_strlcpy(idx_str, arg, sizeof(idx_str));
+    p = strchr(idx_str, ':');
+    if (!p) {
+        av_log(NULL, AV_LOG_FATAL,
+               "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
+               arg, opt);
+        exit_program(1);
+    }
+    *p++ = '\0';
+    idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, INT_MAX);
+    o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
+    o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
+    return 0;
+}
+
+static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)
+{
+    AVFormatContext *is = ifile->ctx;
+    AVFormatContext *os = ofile->ctx;
+    AVChapter **tmp;
+    int i;
+
+    tmp = av_realloc(os->chapters, sizeof(*os->chapters) * (is->nb_chapters + os->nb_chapters));
+    if (!tmp)
+        return AVERROR(ENOMEM);
+    os->chapters = tmp;
+
+    for (i = 0; i < is->nb_chapters; i++) {
+        AVChapter *in_ch = is->chapters[i], *out_ch;
+        int64_t start_time = (ofile->start_time == AV_NOPTS_VALUE) ? 0 : ofile->start_time;
+        int64_t ts_off   = av_rescale_q(start_time - ifile->ts_offset,
+                                       AV_TIME_BASE_Q, in_ch->time_base);
+        int64_t rt       = (ofile->recording_time == INT64_MAX) ? INT64_MAX :
+                           av_rescale_q(ofile->recording_time, AV_TIME_BASE_Q, in_ch->time_base);
+
+
+        if (in_ch->end < ts_off)
+            continue;
+        if (rt != INT64_MAX && in_ch->start > rt + ts_off)
+            break;
+
+        out_ch = av_mallocz(sizeof(AVChapter));
+        if (!out_ch)
+            return AVERROR(ENOMEM);
+
+        out_ch->id        = in_ch->id;
+        out_ch->time_base = in_ch->time_base;
+        out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
+        out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);
+
+        if (copy_metadata)
+            av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);
+
+        os->chapters[os->nb_chapters++] = out_ch;
+    }
+    return 0;
+}
+
+static void init_output_filter(OutputFilter *ofilter, OptionsContext *o,
+                               AVFormatContext *oc)
+{
+    OutputStream *ost;
+
+    switch (ofilter->type) {
+    case AVMEDIA_TYPE_VIDEO: ost = new_video_stream(o, oc); break;
+    case AVMEDIA_TYPE_AUDIO: ost = new_audio_stream(o, oc); break;
+    default:
+        av_log(NULL, AV_LOG_FATAL, "Only video and audio filters are supported "
+               "currently.\n");
+        exit_program(1);
+    }
+
+    ost->source_index = -1;
+    ost->filter       = ofilter;
+
+    ofilter->ost      = ost;
+    ofilter->format   = -1;
+
+    if (ost->stream_copy) {
+        av_log(NULL, AV_LOG_ERROR, "Streamcopy requested for output stream %d:%d, "
+               "which is fed from a complex filtergraph. Filtering and streamcopy "
+               "cannot be used together.\n", ost->file_index, ost->index);
+        exit_program(1);
+    }
+
+    avfilter_inout_free(&ofilter->out_tmp);
+}
+
+static int init_complex_filters(void)
+{
+    int i, ret = 0;
+
+    for (i = 0; i < nb_filtergraphs; i++) {
+        ret = init_complex_filtergraph(filtergraphs[i]);
+        if (ret < 0)
+            return ret;
+    }
+    return 0;
+}
+
+static int open_output_file(OptionsContext *o, const char *filename)
+{
+    AVFormatContext *oc;
+    int i, j, err;
+    AVOutputFormat *file_oformat;
+    OutputFile *of;
+    OutputStream *ost;
+    InputStream  *ist;
+    AVDictionary *unused_opts = NULL;
+    AVDictionaryEntry *e = NULL;
+
+    GROW_ARRAY(output_files, nb_output_files);
+    of = av_mallocz(sizeof(*of));
+    if (!of)
+        exit_program(1);
+    output_files[nb_output_files - 1] = of;
+
+    of->ost_index      = nb_output_streams;
+    of->recording_time = o->recording_time;
+    of->start_time     = o->start_time;
+    of->limit_filesize = o->limit_filesize;
+    of->shortest       = o->shortest;
+    av_dict_copy(&of->opts, o->g->format_opts, 0);
+
+    if (!strcmp(filename, "-"))
+        filename = "pipe:";
+
+    oc = avformat_alloc_context();
+    if (!oc) {
+        print_error(filename, AVERROR(ENOMEM));
+        exit_program(1);
+    }
+    of->ctx = oc;
+    if (o->recording_time != INT64_MAX)
+        oc->duration = o->recording_time;
+
+    if (o->format) {
+        file_oformat = av_guess_format(o->format, NULL, NULL);
+        if (!file_oformat) {
+            av_log(NULL, AV_LOG_FATAL, "Requested output format '%s' is not a suitable output format\n", o->format);
+            exit_program(1);
+        }
+    } else {
+        file_oformat = av_guess_format(NULL, filename, NULL);
+        if (!file_oformat) {
+            av_log(NULL, AV_LOG_FATAL, "Unable to find a suitable output format for '%s'\n",
+                   filename);
+            exit_program(1);
+        }
+    }
+
+    oc->oformat = file_oformat;
+    oc->interrupt_callback = int_cb;
+    av_strlcpy(oc->filename, filename, sizeof(oc->filename));
+
+    /* create streams for all unlabeled output pads */
+    for (i = 0; i < nb_filtergraphs; i++) {
+        FilterGraph *fg = filtergraphs[i];
+        for (j = 0; j < fg->nb_outputs; j++) {
+            OutputFilter *ofilter = fg->outputs[j];
+
+            if (!ofilter->out_tmp || ofilter->out_tmp->name)
+                continue;
+
+            switch (ofilter->type) {
+            case AVMEDIA_TYPE_VIDEO:    o->video_disable    = 1; break;
+            case AVMEDIA_TYPE_AUDIO:    o->audio_disable    = 1; break;
+            case AVMEDIA_TYPE_SUBTITLE: o->subtitle_disable = 1; break;
+            }
+            init_output_filter(ofilter, o, oc);
+        }
+    }
+
+    if (!o->nb_stream_maps) {
+        /* pick the "best" stream of each type */
+#define NEW_STREAM(type, index)\
+        if (index >= 0) {\
+            ost = new_ ## type ## _stream(o, oc);\
+            ost->source_index = index;\
+            ost->sync_ist     = input_streams[index];\
+            input_streams[index]->discard = 0;\
+            input_streams[index]->st->discard = AVDISCARD_NONE;\
+        }
+
+        /* video: highest resolution */
+        if (!o->video_disable && oc->oformat->video_codec != AV_CODEC_ID_NONE) {
+            int area = 0, idx = -1;
+            for (i = 0; i < nb_input_streams; i++) {
+                ist = input_streams[i];
+                if (ist->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
+                    ist->st->codecpar->width * ist->st->codecpar->height > area) {
+                    area = ist->st->codecpar->width * ist->st->codecpar->height;
+                    idx = i;
+                }
+            }
+            NEW_STREAM(video, idx);
+        }
+
+        /* audio: most channels */
+        if (!o->audio_disable && oc->oformat->audio_codec != AV_CODEC_ID_NONE) {
+            int channels = 0, idx = -1;
+            for (i = 0; i < nb_input_streams; i++) {
+                ist = input_streams[i];
+                if (ist->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
+                    ist->st->codecpar->channels > channels) {
+                    channels = ist->st->codecpar->channels;
+                    idx = i;
+                }
+            }
+            NEW_STREAM(audio, idx);
+        }
+
+        /* subtitles: pick first */
+        if (!o->subtitle_disable && oc->oformat->subtitle_codec != AV_CODEC_ID_NONE) {
+            for (i = 0; i < nb_input_streams; i++)
+                if (input_streams[i]->st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
+                    NEW_STREAM(subtitle, i);
+                    break;
+                }
+        }
+        /* do something with data? */
+    } else {
+        for (i = 0; i < o->nb_stream_maps; i++) {
+            StreamMap *map = &o->stream_maps[i];
+
+            if (map->disabled)
+                continue;
+
+            if (map->linklabel) {
+                FilterGraph *fg;
+                OutputFilter *ofilter = NULL;
+                int j, k;
+
+                for (j = 0; j < nb_filtergraphs; j++) {
+                    fg = filtergraphs[j];
+                    for (k = 0; k < fg->nb_outputs; k++) {
+                        AVFilterInOut *out = fg->outputs[k]->out_tmp;
+                        if (out && !strcmp(out->name, map->linklabel)) {
+                            ofilter = fg->outputs[k];
+                            goto loop_end;
+                        }
+                    }
+                }
+loop_end:
+                if (!ofilter) {
+                    av_log(NULL, AV_LOG_FATAL, "Output with label '%s' does not exist "
+                           "in any defined filter graph.\n", map->linklabel);
+                    exit_program(1);
+                }
+                init_output_filter(ofilter, o, oc);
+            } else {
+                ist = input_streams[input_files[map->file_index]->ist_index + map->stream_index];
+                switch (ist->st->codecpar->codec_type) {
+                case AVMEDIA_TYPE_VIDEO:    ost = new_video_stream(o, oc);    break;
+                case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
+                case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
+                case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
+                case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
+                default:
+                    av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d:%d - unsupported type.\n",
+                           map->file_index, map->stream_index);
+                    exit_program(1);
+                }
+
+                ost->source_index = input_files[map->file_index]->ist_index + map->stream_index;
+                ost->sync_ist     = input_streams[input_files[map->sync_file_index]->ist_index +
+                                               map->sync_stream_index];
+                ist->discard = 0;
+                ist->st->discard = AVDISCARD_NONE;
+            }
+        }
+    }
+
+    /* handle attached files */
+    for (i = 0; i < o->nb_attachments; i++) {
+        AVIOContext *pb;
+        uint8_t *attachment;
+        const char *p;
+        int64_t len;
+
+        if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Could not open attachment file %s.\n",
+                   o->attachments[i]);
+            exit_program(1);
+        }
+        if ((len = avio_size(pb)) <= 0) {
+            av_log(NULL, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
+                   o->attachments[i]);
+            exit_program(1);
+        }
+        if (!(attachment = av_malloc(len))) {
+            av_log(NULL, AV_LOG_FATAL, "Attachment %s too large to fit into memory.\n",
+                   o->attachments[i]);
+            exit_program(1);
+        }
+        avio_read(pb, attachment, len);
+
+        ost = new_attachment_stream(o, oc);
+        ost->stream_copy               = 0;
+        ost->source_index              = -1;
+        ost->attachment_filename       = o->attachments[i];
+        ost->st->codecpar->extradata      = attachment;
+        ost->st->codecpar->extradata_size = len;
+
+        p = strrchr(o->attachments[i], '/');
+        av_dict_set(&ost->st->metadata, "filename", (p && *p) ? p + 1 : o->attachments[i], AV_DICT_DONT_OVERWRITE);
+        avio_close(pb);
+    }
+
+    if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
+        av_dump_format(oc, nb_output_files - 1, oc->filename, 1);
+        av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", nb_output_files - 1);
+        exit_program(1);
+    }
+
+    /* check if all codec options have been used */
+    unused_opts = strip_specifiers(o->g->codec_opts);
+    for (i = of->ost_index; i < nb_output_streams; i++) {
+        e = NULL;
+        while ((e = av_dict_get(output_streams[i]->encoder_opts, "", e,
+                                AV_DICT_IGNORE_SUFFIX)))
+            av_dict_set(&unused_opts, e->key, NULL, 0);
+    }
+
+    e = NULL;
+    while ((e = av_dict_get(unused_opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
+        const AVClass *class = avcodec_get_class();
+        const AVOption *option = av_opt_find(&class, e->key, NULL, 0,
+                                             AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ);
+        if (!option)
+            continue;
+        if (!(option->flags & AV_OPT_FLAG_ENCODING_PARAM)) {
+            av_log(NULL, AV_LOG_ERROR, "Codec AVOption %s (%s) specified for "
+                   "output file #%d (%s) is not an encoding option.\n", e->key,
+                   option->help ? option->help : "", nb_output_files - 1,
+                   filename);
+            exit_program(1);
+        }
+
+        av_log(NULL, AV_LOG_WARNING, "Codec AVOption %s (%s) specified for "
+               "output file #%d (%s) has not been used for any stream. The most "
+               "likely reason is either wrong type (e.g. a video option with "
+               "no video streams) or that it is a private option of some encoder "
+               "which was not actually used for any stream.\n", e->key,
+               option->help ? option->help : "", nb_output_files - 1, filename);
+    }
+    av_dict_free(&unused_opts);
+
+    /* set the decoding_needed flags and create simple filtergraphs */
+    for (i = of->ost_index; i < nb_output_streams; i++) {
+        OutputStream *ost = output_streams[i];
+
+        if (ost->encoding_needed && ost->source_index >= 0) {
+            InputStream *ist = input_streams[ost->source_index];
+            ist->decoding_needed = 1;
+
+            if (ost->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
+                ost->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
+                err = init_simple_filtergraph(ist, ost);
+                if (err < 0) {
+                    av_log(NULL, AV_LOG_ERROR,
+                           "Error initializing a simple filtergraph between streams "
+                           "%d:%d->%d:%d\n", ist->file_index, ost->source_index,
+                           nb_output_files - 1, ost->st->index);
+                    exit_program(1);
+                }
+            }
+        }
+
+        /*
+         * We want CFR output if and only if one of those is true:
+         * 1) user specified output framerate with -r
+         * 2) user specified -vsync cfr
+         * 3) output format is CFR and the user didn't force vsync to
+         *    something else than CFR
+         *
+         * in such a case, set ost->frame_rate
+         */
+        if (ost->encoding_needed && ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+            int format_cfr = !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS));
+            int need_cfr = !!ost->frame_rate.num;
+
+            if (video_sync_method == VSYNC_CFR ||
+                (video_sync_method == VSYNC_AUTO && format_cfr))
+                need_cfr = 1;
+
+            if (need_cfr && !ost->frame_rate.num) {
+                InputStream *ist = ost->source_index >= 0 ? input_streams[ost->source_index] : NULL;
+
+                if (ist && ist->framerate.num)
+                    ost->frame_rate = ist->framerate;
+                else if (ist && ist->st->avg_frame_rate.num)
+                    ost->frame_rate = ist->st->avg_frame_rate;
+                else {
+                    av_log(NULL, AV_LOG_WARNING, "Constant framerate requested "
+                           "for the output stream #%d:%d, but no information "
+                           "about the input framerate is available. Falling "
+                           "back to a default value of 25fps. Use the -r option "
+                           "if you want a different framerate.\n",
+                           ost->file_index, ost->index);
+                    ost->frame_rate = (AVRational){ 25, 1 };
+                }
+            }
+
+            if (need_cfr && ost->enc->supported_framerates && !ost->force_fps) {
+                int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
+                ost->frame_rate = ost->enc->supported_framerates[idx];
+            }
+        }
+
+        /* set the filter output constraints */
+        if (ost->filter) {
+            OutputFilter *f = ost->filter;
+            int count;
+            switch (ost->enc_ctx->codec_type) {
+            case AVMEDIA_TYPE_VIDEO:
+                f->frame_rate = ost->frame_rate;
+                f->width      = ost->enc_ctx->width;
+                f->height     = ost->enc_ctx->height;
+                if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
+                    f->format = ost->enc_ctx->pix_fmt;
+                } else if (ost->enc->pix_fmts) {
+                    count = 0;
+                    while (ost->enc->pix_fmts[count] != AV_PIX_FMT_NONE)
+                        count++;
+                    f->formats = av_mallocz_array(count + 1, sizeof(*f->formats));
+                    if (!f->formats)
+                        exit_program(1);
+                    memcpy(f->formats, ost->enc->pix_fmts, (count + 1) * sizeof(*f->formats));
+                }
+                break;
+            case AVMEDIA_TYPE_AUDIO:
+                if (ost->enc_ctx->sample_fmt != AV_SAMPLE_FMT_NONE) {
+                    f->format = ost->enc_ctx->sample_fmt;
+                } else if (ost->enc->sample_fmts) {
+                    count = 0;
+                    while (ost->enc->sample_fmts[count] != AV_SAMPLE_FMT_NONE)
+                        count++;
+                    f->formats = av_mallocz_array(count + 1, sizeof(*f->formats));
+                    if (!f->formats)
+                        exit_program(1);
+                    memcpy(f->formats, ost->enc->sample_fmts, (count + 1) * sizeof(*f->formats));
+                }
+                if (ost->enc_ctx->sample_rate) {
+                    f->sample_rate = ost->enc_ctx->sample_rate;
+                } else if (ost->enc->supported_samplerates) {
+                    count = 0;
+                    while (ost->enc->supported_samplerates[count])
+                        count++;
+                    f->sample_rates = av_mallocz_array(count + 1, sizeof(*f->sample_rates));
+                    if (!f->sample_rates)
+                        exit_program(1);
+                    memcpy(f->sample_rates, ost->enc->supported_samplerates,
+                           (count + 1) * sizeof(*f->sample_rates));
+                }
+                if (ost->enc_ctx->channels) {
+                    f->channel_layout = av_get_default_channel_layout(ost->enc_ctx->channels);
+                } else if (ost->enc->channel_layouts) {
+                    count = 0;
+                    while (ost->enc->channel_layouts[count])
+                        count++;
+                    f->channel_layouts = av_mallocz_array(count + 1, sizeof(*f->channel_layouts));
+                    if (!f->channel_layouts)
+                        exit_program(1);
+                    memcpy(f->channel_layouts, ost->enc->channel_layouts,
+                           (count + 1) * sizeof(*f->channel_layouts));
+                }
+                break;
+            }
+        }
+
+    }
+
+    /* check filename in case of an image number is expected */
+    if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
+        if (!av_filename_number_test(oc->filename)) {
+            print_error(oc->filename, AVERROR(EINVAL));
+            exit_program(1);
+        }
+    }
+
+    if (!(oc->oformat->flags & AVFMT_NOFILE)) {
+        /* test if it already exists to avoid losing precious files */
+        assert_file_overwrite(filename);
+
+        /* open the file */
+        if ((err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
+                              &oc->interrupt_callback,
+                              &of->opts)) < 0) {
+            print_error(filename, err);
+            exit_program(1);
+        }
+    }
+
+    if (o->mux_preload) {
+        uint8_t buf[64];
+        snprintf(buf, sizeof(buf), "%d", (int)(o->mux_preload*AV_TIME_BASE));
+        av_dict_set(&of->opts, "preload", buf, 0);
+    }
+    oc->max_delay = (int)(o->mux_max_delay * AV_TIME_BASE);
+    oc->flags |= AVFMT_FLAG_NONBLOCK;
+
+    /* copy metadata */
+    for (i = 0; i < o->nb_metadata_map; i++) {
+        char *p;
+        int in_file_index = strtol(o->metadata_map[i].u.str, &p, 0);
+
+        if (in_file_index >= nb_input_files) {
+            av_log(NULL, AV_LOG_FATAL, "Invalid input file index %d while processing metadata maps\n", in_file_index);
+            exit_program(1);
+        }
+        copy_metadata(o->metadata_map[i].specifier, *p ? p + 1 : p, oc,
+                      in_file_index >= 0 ?
+                      input_files[in_file_index]->ctx : NULL, o);
+    }
+
+    /* copy chapters */
+    if (o->chapters_input_file >= nb_input_files) {
+        if (o->chapters_input_file == INT_MAX) {
+            /* copy chapters from the first input file that has them*/
+            o->chapters_input_file = -1;
+            for (i = 0; i < nb_input_files; i++)
+                if (input_files[i]->ctx->nb_chapters) {
+                    o->chapters_input_file = i;
+                    break;
+                }
+        } else {
+            av_log(NULL, AV_LOG_FATAL, "Invalid input file index %d in chapter mapping.\n",
+                   o->chapters_input_file);
+            exit_program(1);
+        }
+    }
+    if (o->chapters_input_file >= 0)
+        copy_chapters(input_files[o->chapters_input_file], of,
+                      !o->metadata_chapters_manual);
+
+    /* copy global metadata by default */
+    if (!o->metadata_global_manual && nb_input_files)
+        av_dict_copy(&oc->metadata, input_files[0]->ctx->metadata,
+                     AV_DICT_DONT_OVERWRITE);
+    if (!o->metadata_streams_manual)
+        for (i = of->ost_index; i < nb_output_streams; i++) {
+            InputStream *ist;
+            if (output_streams[i]->source_index < 0)         /* this is true e.g. for attached files */
+                continue;
+            ist = input_streams[output_streams[i]->source_index];
+            av_dict_copy(&output_streams[i]->st->metadata, ist->st->metadata, AV_DICT_DONT_OVERWRITE);
+        }
+
+    /* process manually set metadata */
+    for (i = 0; i < o->nb_metadata; i++) {
+        AVDictionary **m;
+        char type, *val;
+        const char *stream_spec;
+        int index = 0, j, ret;
+
+        val = strchr(o->metadata[i].u.str, '=');
+        if (!val) {
+            av_log(NULL, AV_LOG_FATAL, "No '=' character in metadata string %s.\n",
+                   o->metadata[i].u.str);
+            exit_program(1);
+        }
+        *val++ = 0;
+
+        parse_meta_type(o->metadata[i].specifier, &type, &index, &stream_spec);
+        if (type == 's') {
+            for (j = 0; j < oc->nb_streams; j++) {
+                if ((ret = check_stream_specifier(oc, oc->streams[j], stream_spec)) > 0) {
+                    av_dict_set(&oc->streams[j]->metadata, o->metadata[i].u.str, *val ? val : NULL, 0);
+                } else if (ret < 0)
+                    exit_program(1);
+            }
+        }
+        else {
+            switch (type) {
+            case 'g':
+                m = &oc->metadata;
+                break;
+            case 'c':
+                if (index < 0 || index >= oc->nb_chapters) {
+                    av_log(NULL, AV_LOG_FATAL, "Invalid chapter index %d in metadata specifier.\n", index);
+                    exit_program(1);
+                }
+                m = &oc->chapters[index]->metadata;
+                break;
+            default:
+                av_log(NULL, AV_LOG_FATAL, "Invalid metadata specifier %s.\n", o->metadata[i].specifier);
+                exit_program(1);
+            }
+            av_dict_set(m, o->metadata[i].u.str, *val ? val : NULL, 0);
+        }
+    }
+
+    return 0;
+}
+
+static int opt_target(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    enum { PAL, NTSC, FILM, UNKNOWN } norm = UNKNOWN;
+    static const char *const frame_rates[] = { "25", "30000/1001", "24000/1001" };
+
+    if (!strncmp(arg, "pal-", 4)) {
+        norm = PAL;
+        arg += 4;
+    } else if (!strncmp(arg, "ntsc-", 5)) {
+        norm = NTSC;
+        arg += 5;
+    } else if (!strncmp(arg, "film-", 5)) {
+        norm = FILM;
+        arg += 5;
+    } else {
+        /* Try to determine PAL/NTSC by peeking in the input files */
+        if (nb_input_files) {
+            int i, j, fr;
+            for (j = 0; j < nb_input_files; j++) {
+                for (i = 0; i < input_files[j]->nb_streams; i++) {
+                    AVStream *st = input_files[j]->ctx->streams[i];
+                    if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
+                        continue;
+                    fr = st->time_base.den * 1000 / st->time_base.num;
+                    if (fr == 25000) {
+                        norm = PAL;
+                        break;
+                    } else if ((fr == 29970) || (fr == 23976)) {
+                        norm = NTSC;
+                        break;
+                    }
+                }
+                if (norm != UNKNOWN)
+                    break;
+            }
+        }
+        if (norm != UNKNOWN)
+            av_log(NULL, AV_LOG_INFO, "Assuming %s for target.\n", norm == PAL ? "PAL" : "NTSC");
+    }
+
+    if (norm == UNKNOWN) {
+        av_log(NULL, AV_LOG_FATAL, "Could not determine norm (PAL/NTSC/NTSC-Film) for target.\n");
+        av_log(NULL, AV_LOG_FATAL, "Please prefix target with \"pal-\", \"ntsc-\" or \"film-\",\n");
+        av_log(NULL, AV_LOG_FATAL, "or set a framerate with \"-r xxx\".\n");
+        exit_program(1);
+    }
+
+    if (!strcmp(arg, "vcd")) {
+        opt_video_codec(o, "c:v", "mpeg1video");
+        opt_audio_codec(o, "c:a", "mp2");
+        parse_option(o, "f", "vcd", options);
+
+        parse_option(o, "s", norm == PAL ? "352x288" : "352x240", options);
+        parse_option(o, "r", frame_rates[norm], options);
+        opt_default(NULL, "g", norm == PAL ? "15" : "18");
+
+        opt_default(NULL, "b", "1150000");
+        opt_default(NULL, "maxrate", "1150000");
+        opt_default(NULL, "minrate", "1150000");
+        opt_default(NULL, "bufsize", "327680"); // 40*1024*8;
+
+        opt_default(NULL, "b:a", "224000");
+        parse_option(o, "ar", "44100", options);
+        parse_option(o, "ac", "2", options);
+
+        opt_default(NULL, "packetsize", "2324");
+        opt_default(NULL, "muxrate", "3528"); // 2352 * 75 / 50;
+
+        /* We have to offset the PTS, so that it is consistent with the SCR.
+           SCR starts at 36000, but the first two packs contain only padding
+           and the first pack from the other stream, respectively, may also have
+           been written before.
+           So the real data starts at SCR 36000+3*1200. */
+        o->mux_preload = (36000 + 3 * 1200) / 90000.0; // 0.44
+    } else if (!strcmp(arg, "svcd")) {
+
+        opt_video_codec(o, "c:v", "mpeg2video");
+        opt_audio_codec(o, "c:a", "mp2");
+        parse_option(o, "f", "svcd", options);
+
+        parse_option(o, "s", norm == PAL ? "480x576" : "480x480", options);
+        parse_option(o, "r", frame_rates[norm], options);
+        opt_default(NULL, "g", norm == PAL ? "15" : "18");
+
+        opt_default(NULL, "b", "2040000");
+        opt_default(NULL, "maxrate", "2516000");
+        opt_default(NULL, "minrate", "0"); // 1145000;
+        opt_default(NULL, "bufsize", "1835008"); // 224*1024*8;
+        opt_default(NULL, "scan_offset", "1");
+
+
+        opt_default(NULL, "b:a", "224000");
+        parse_option(o, "ar", "44100", options);
+
+        opt_default(NULL, "packetsize", "2324");
+
+    } else if (!strcmp(arg, "dvd")) {
+
+        opt_video_codec(o, "c:v", "mpeg2video");
+        opt_audio_codec(o, "c:a", "ac3");
+        parse_option(o, "f", "dvd", options);
+
+        parse_option(o, "s", norm == PAL ? "720x576" : "720x480", options);
+        parse_option(o, "r", frame_rates[norm], options);
+        opt_default(NULL, "g", norm == PAL ? "15" : "18");
+
+        opt_default(NULL, "b", "6000000");
+        opt_default(NULL, "maxrate", "9000000");
+        opt_default(NULL, "minrate", "0"); // 1500000;
+        opt_default(NULL, "bufsize", "1835008"); // 224*1024*8;
+
+        opt_default(NULL, "packetsize", "2048");  // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
+        opt_default(NULL, "muxrate", "25200"); // from mplex project: data_rate = 1260000. mux_rate = data_rate / 50
+
+        opt_default(NULL, "b:a", "448000");
+        parse_option(o, "ar", "48000", options);
+
+    } else if (!strncmp(arg, "dv", 2)) {
+
+        parse_option(o, "f", "dv", options);
+
+        parse_option(o, "s", norm == PAL ? "720x576" : "720x480", options);
+        parse_option(o, "pix_fmt", !strncmp(arg, "dv50", 4) ? "yuv422p" :
+                          norm == PAL ? "yuv420p" : "yuv411p", options);
+        parse_option(o, "r", frame_rates[norm], options);
+
+        parse_option(o, "ar", "48000", options);
+        parse_option(o, "ac", "2", options);
+
+    } else {
+        av_log(NULL, AV_LOG_ERROR, "Unknown target: %s\n", arg);
+        return AVERROR(EINVAL);
+    }
+
+    av_dict_copy(&o->g->codec_opts,  codec_opts, 0);
+    av_dict_copy(&o->g->format_opts, format_opts, 0);
+
+    return 0;
+}
+
+static int opt_vstats_file(void *optctx, const char *opt, const char *arg)
+{
+    av_free (vstats_filename);
+    vstats_filename = av_strdup (arg);
+    return 0;
+}
+
+static int opt_vstats(void *optctx, const char *opt, const char *arg)
+{
+    char filename[40];
+    time_t today2 = time(NULL);
+    struct tm *today = localtime(&today2);
+
+    if (!today) { // maybe tomorrow
+        av_log(NULL, AV_LOG_FATAL, "Unable to get current time.\n");
+        exit_program(1);
+    }
+
+    snprintf(filename, sizeof(filename), "vstats_%02d%02d%02d.log", today->tm_hour, today->tm_min,
+             today->tm_sec);
+    return opt_vstats_file(NULL, opt, filename);
+}
+
+static int opt_video_frames(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "frames:v", arg, options);
+}
+
+static int opt_audio_frames(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "frames:a", arg, options);
+}
+
+static int opt_data_frames(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "frames:d", arg, options);
+}
+
+static int opt_video_tag(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "tag:v", arg, options);
+}
+
+static int opt_audio_tag(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "tag:a", arg, options);
+}
+
+static int opt_subtitle_tag(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "tag:s", arg, options);
+}
+
+static int opt_video_filters(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "filter:v", arg, options);
+}
+
+static int opt_audio_filters(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "filter:a", arg, options);
+}
+
+static int opt_vsync(void *optctx, const char *opt, const char *arg)
+{
+    if      (!av_strcasecmp(arg, "cfr"))         video_sync_method = VSYNC_CFR;
+    else if (!av_strcasecmp(arg, "vfr"))         video_sync_method = VSYNC_VFR;
+    else if (!av_strcasecmp(arg, "passthrough")) video_sync_method = VSYNC_PASSTHROUGH;
+
+    if (video_sync_method == VSYNC_AUTO)
+        video_sync_method = parse_number_or_die("vsync", arg, OPT_INT, VSYNC_AUTO, VSYNC_VFR);
+    return 0;
+}
+
+static int opt_channel_layout(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    char layout_str[32];
+    char *stream_str;
+    char *ac_str;
+    int ret, channels, ac_str_size;
+    uint64_t layout;
+
+    layout = av_get_channel_layout(arg);
+    if (!layout) {
+        av_log(NULL, AV_LOG_ERROR, "Unknown channel layout: %s\n", arg);
+        return AVERROR(EINVAL);
+    }
+    snprintf(layout_str, sizeof(layout_str), "%"PRIu64, layout);
+    ret = opt_default(NULL, opt, layout_str);
+    if (ret < 0)
+        return ret;
+
+    /* set 'ac' option based on channel layout */
+    channels = av_get_channel_layout_nb_channels(layout);
+    snprintf(layout_str, sizeof(layout_str), "%d", channels);
+    stream_str = strchr(opt, ':');
+    ac_str_size = 3 + (stream_str ? strlen(stream_str) : 0);
+    ac_str = av_mallocz(ac_str_size);
+    if (!ac_str)
+        return AVERROR(ENOMEM);
+    av_strlcpy(ac_str, "ac", 3);
+    if (stream_str)
+        av_strlcat(ac_str, stream_str, ac_str_size);
+    ret = parse_option(o, ac_str, layout_str, options);
+    av_free(ac_str);
+
+    return ret;
+}
+
+static int opt_audio_qscale(void *optctx, const char *opt, const char *arg)
+{
+    OptionsContext *o = optctx;
+    return parse_option(o, "q:a", arg, options);
+}
+
+static int opt_filter_complex(void *optctx, const char *opt, const char *arg)
+{
+    GROW_ARRAY(filtergraphs, nb_filtergraphs);
+    if (!(filtergraphs[nb_filtergraphs - 1] = av_mallocz(sizeof(*filtergraphs[0]))))
+        return AVERROR(ENOMEM);
+    filtergraphs[nb_filtergraphs - 1]->index      = nb_filtergraphs - 1;
+    filtergraphs[nb_filtergraphs - 1]->graph_desc = av_strdup(arg);
+    if (!filtergraphs[nb_filtergraphs - 1]->graph_desc)
+        return AVERROR(ENOMEM);
+    return 0;
+}
+
+static int opt_filter_complex_script(void *optctx, const char *opt, const char *arg)
+{
+    uint8_t *graph_desc = read_file(arg);
+    if (!graph_desc)
+        return AVERROR(EINVAL);
+
+    GROW_ARRAY(filtergraphs, nb_filtergraphs);
+    if (!(filtergraphs[nb_filtergraphs - 1] = av_mallocz(sizeof(*filtergraphs[0]))))
+        return AVERROR(ENOMEM);
+    filtergraphs[nb_filtergraphs - 1]->index      = nb_filtergraphs - 1;
+    filtergraphs[nb_filtergraphs - 1]->graph_desc = graph_desc;
+    return 0;
+}
+
+void show_help_default(const char *opt, const char *arg)
+{
+    /* per-file options have at least one of those set */
+    const int per_file = OPT_SPEC | OPT_OFFSET | OPT_PERFILE;
+    int show_advanced = 0, show_avoptions = 0;
+
+    if (opt && *opt) {
+        if (!strcmp(opt, "long"))
+            show_advanced = 1;
+        else if (!strcmp(opt, "full"))
+            show_advanced = show_avoptions = 1;
+        else
+            av_log(NULL, AV_LOG_ERROR, "Unknown help option '%s'.\n", opt);
+    }
+
+    show_usage();
+
+    printf("Getting help:\n"
+           "    -h      -- print basic options\n"
+           "    -h long -- print more options\n"
+           "    -h full -- print all options (including all format and codec specific options, very long)\n"
+           "    -h type=name -- print all options for the named decoder/encoder/demuxer/muxer/filter\n"
+           "    See man %s for detailed description of the options.\n"
+           "\n", program_name);
+
+    show_help_options(options, "Print help / information / capabilities:",
+                      OPT_EXIT, 0, 0);
+
+    show_help_options(options, "Global options (affect whole program "
+                      "instead of just one file:",
+                      0, per_file | OPT_EXIT | OPT_EXPERT, 0);
+    if (show_advanced)
+        show_help_options(options, "Advanced global options:", OPT_EXPERT,
+                          per_file | OPT_EXIT, 0);
+
+    show_help_options(options, "Per-file main options:", 0,
+                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE |
+                      OPT_EXIT, per_file);
+    if (show_advanced)
+        show_help_options(options, "Advanced per-file options:",
+                          OPT_EXPERT, OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE, per_file);
+
+    show_help_options(options, "Video options:",
+                      OPT_VIDEO, OPT_EXPERT | OPT_AUDIO, 0);
+    if (show_advanced)
+        show_help_options(options, "Advanced Video options:",
+                          OPT_EXPERT | OPT_VIDEO, OPT_AUDIO, 0);
+
+    show_help_options(options, "Audio options:",
+                      OPT_AUDIO, OPT_EXPERT | OPT_VIDEO, 0);
+    if (show_advanced)
+        show_help_options(options, "Advanced Audio options:",
+                          OPT_EXPERT | OPT_AUDIO, OPT_VIDEO, 0);
+    show_help_options(options, "Subtitle options:",
+                      OPT_SUBTITLE, 0, 0);
+    printf("\n");
+
+    if (show_avoptions) {
+        int flags = AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM;
+        show_help_children(avcodec_get_class(), flags);
+        show_help_children(avformat_get_class(), flags);
+        show_help_children(sws_get_class(), flags);
+        show_help_children(avfilter_get_class(), AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM);
+    }
+}
+
+void show_usage(void)
+{
+    printf("Hyper fast Audio and Video encoder\n");
+    printf("usage: %s [options] [[infile options] -i infile]... {[outfile options] outfile}...\n", program_name);
+    printf("\n");
+}
+
+enum OptGroup {
+    GROUP_OUTFILE,
+    GROUP_INFILE,
+};
+
+static const OptionGroupDef groups[] = {
+    [GROUP_OUTFILE] = { "output file",  NULL, OPT_OUTPUT },
+    [GROUP_INFILE]  = { "input file",   "i",  OPT_INPUT },
+};
+
+static int open_files(OptionGroupList *l, const char *inout,
+                      int (*open_file)(OptionsContext*, const char*))
+{
+    int i, ret;
+
+    for (i = 0; i < l->nb_groups; i++) {
+        OptionGroup *g = &l->groups[i];
+        OptionsContext o;
+
+        init_options(&o);
+        o.g = g;
+
+        ret = parse_optgroup(&o, g);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error parsing options for %s file "
+                   "%s.\n", inout, g->arg);
+            return ret;
+        }
+
+        av_log(NULL, AV_LOG_DEBUG, "Opening an %s file: %s.\n", inout, g->arg);
+        ret = open_file(&o, g->arg);
+        uninit_options(&o);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error opening %s file %s.\n",
+                   inout, g->arg);
+            return ret;
+        }
+        av_log(NULL, AV_LOG_DEBUG, "Successfully opened the file.\n");
+    }
+
+    return 0;
+}
+
+int avconv_parse_options(int argc, char **argv)
+{
+    OptionParseContext octx;
+    uint8_t error[128];
+    int ret;
+
+    memset(&octx, 0, sizeof(octx));
+
+    /* split the commandline into an internal representation */
+    ret = split_commandline(&octx, argc, argv, options, groups,
+                            FF_ARRAY_ELEMS(groups));
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error splitting the argument list: ");
+        goto fail;
+    }
+
+    /* apply global options */
+    ret = parse_optgroup(NULL, &octx.global_opts);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error parsing global options: ");
+        goto fail;
+    }
+
+    /* open input files */
+    ret = open_files(&octx.groups[GROUP_INFILE], "input", open_input_file);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error opening input files: ");
+        goto fail;
+    }
+
+    /* create the complex filtergraphs */
+    ret = init_complex_filters();
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error initializing complex filters.\n");
+        goto fail;
+    }
+
+    /* open output files */
+    ret = open_files(&octx.groups[GROUP_OUTFILE], "output", open_output_file);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error opening output files: ");
+        goto fail;
+    }
+
+fail:
+    uninit_parse_context(&octx);
+    if (ret < 0) {
+        av_strerror(ret, error, sizeof(error));
+        av_log(NULL, AV_LOG_FATAL, "%s\n", error);
+    }
+    return ret;
+}
+
+#define OFFSET(x) offsetof(OptionsContext, x)
+const OptionDef options[] = {
+    /* main options */
+    CMDUTILS_COMMON_OPTIONS
+    { "f",              HAS_ARG | OPT_STRING | OPT_OFFSET |
+                        OPT_INPUT | OPT_OUTPUT,                      { .off       = OFFSET(format) },
+        "force format", "fmt" },
+    { "y",              OPT_BOOL,                                    {              &file_overwrite },
+        "overwrite output files" },
+    { "n",              OPT_BOOL,                                    {              &file_skip },
+        "never overwrite output files" },
+    { "c",              HAS_ARG | OPT_STRING | OPT_SPEC |
+                        OPT_INPUT | OPT_OUTPUT,                      { .off       = OFFSET(codec_names) },
+        "codec name", "codec" },
+    { "codec",          HAS_ARG | OPT_STRING | OPT_SPEC |
+                        OPT_INPUT | OPT_OUTPUT,                      { .off       = OFFSET(codec_names) },
+        "codec name", "codec" },
+    { "pre",            HAS_ARG | OPT_STRING | OPT_SPEC |
+                        OPT_OUTPUT,                                  { .off       = OFFSET(presets) },
+        "preset name", "preset" },
+    { "map",            HAS_ARG | OPT_EXPERT | OPT_PERFILE |
+                        OPT_OUTPUT,                                  { .func_arg = opt_map },
+        "set input stream mapping",
+        "[-]input_file_id[:stream_specifier][,sync_file_id[:stream_specifier]]" },
+    { "map_metadata",   HAS_ARG | OPT_STRING | OPT_SPEC |
+                        OPT_OUTPUT,                                  { .off       = OFFSET(metadata_map) },
+        "set metadata information of outfile from infile",
+        "outfile[,metadata]:infile[,metadata]" },
+    { "map_chapters",   HAS_ARG | OPT_INT | OPT_EXPERT | OPT_OFFSET |
+                        OPT_OUTPUT,                                  { .off = OFFSET(chapters_input_file) },
+        "set chapters mapping", "input_file_index" },
+    { "t",              HAS_ARG | OPT_TIME | OPT_OFFSET |
+                        OPT_INPUT | OPT_OUTPUT,                      { .off = OFFSET(recording_time) },
+        "record or transcode \"duration\" seconds of audio/video",
+        "duration" },
+    { "fs",             HAS_ARG | OPT_INT64 | OPT_OFFSET | OPT_OUTPUT, { .off = OFFSET(limit_filesize) },
+        "set the limit file size in bytes", "limit_size" },
+    { "ss",             HAS_ARG | OPT_TIME | OPT_OFFSET |
+                        OPT_INPUT | OPT_OUTPUT,                      { .off = OFFSET(start_time) },
+        "set the start time offset", "time_off" },
+    { "accurate_seek",  OPT_BOOL | OPT_OFFSET | OPT_EXPERT |
+                        OPT_INPUT,                                   { .off = OFFSET(accurate_seek) },
+        "enable/disable accurate seeking with -ss" },
+    { "itsoffset",      HAS_ARG | OPT_TIME | OPT_OFFSET |
+                        OPT_EXPERT | OPT_INPUT,                      { .off = OFFSET(input_ts_offset) },
+        "set the input ts offset", "time_off" },
+    { "itsscale",       HAS_ARG | OPT_DOUBLE | OPT_SPEC |
+                        OPT_EXPERT | OPT_INPUT,                      { .off = OFFSET(ts_scale) },
+        "set the input ts scale", "scale" },
+    { "metadata",       HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(metadata) },
+        "add metadata", "string=string" },
+    { "dframes",        HAS_ARG | OPT_PERFILE | OPT_EXPERT |
+                        OPT_OUTPUT,                                  { .func_arg = opt_data_frames },
+        "set the number of data frames to record", "number" },
+    { "benchmark",      OPT_BOOL | OPT_EXPERT,                       { &do_benchmark },
+        "add timings for benchmarking" },
+    { "timelimit",      HAS_ARG | OPT_EXPERT,                        { .func_arg = opt_timelimit },
+        "set max runtime in seconds", "limit" },
+    { "dump",           OPT_BOOL | OPT_EXPERT,                       { &do_pkt_dump },
+        "dump each input packet" },
+    { "hex",            OPT_BOOL | OPT_EXPERT,                       { &do_hex_dump },
+        "when dumping packets, also dump the payload" },
+    { "re",             OPT_BOOL | OPT_EXPERT | OPT_OFFSET |
+                        OPT_INPUT,                                   { .off = OFFSET(rate_emu) },
+        "read input at native frame rate", "" },
+    { "target",         HAS_ARG | OPT_PERFILE | OPT_OUTPUT,          { .func_arg = opt_target },
+        "specify target file type (\"vcd\", \"svcd\", \"dvd\","
+        " \"dv\", \"dv50\", \"pal-vcd\", \"ntsc-svcd\", ...)", "type" },
+    { "vsync",          HAS_ARG | OPT_EXPERT,                        { .func_arg = opt_vsync },
+        "video sync method", "" },
+    { "async",          HAS_ARG | OPT_INT | OPT_EXPERT,              { &audio_sync_method },
+        "audio sync method", "" },
+    { "adrift_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT,          { &audio_drift_threshold },
+        "audio drift threshold", "threshold" },
+    { "copyts",         OPT_BOOL | OPT_EXPERT,                       { &copy_ts },
+        "copy timestamps" },
+    { "copytb",         OPT_BOOL | OPT_EXPERT,                       { &copy_tb },
+        "copy input stream time base when stream copying" },
+    { "shortest",       OPT_BOOL | OPT_EXPERT | OPT_OFFSET |
+                        OPT_OUTPUT,                                  { .off = OFFSET(shortest) },
+        "finish encoding within shortest input" },
+    { "dts_delta_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT,       { &dts_delta_threshold },
+        "timestamp discontinuity delta threshold", "threshold" },
+    { "xerror",         OPT_BOOL | OPT_EXPERT,                       { &exit_on_error },
+        "exit on error", "error" },
+    { "copyinkf",       OPT_BOOL | OPT_EXPERT | OPT_SPEC |
+                        OPT_OUTPUT,                                  { .off = OFFSET(copy_initial_nonkeyframes) },
+        "copy initial non-keyframes" },
+    { "frames",         OPT_INT64 | HAS_ARG | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(max_frames) },
+        "set the number of frames to record", "number" },
+    { "tag",            OPT_STRING | HAS_ARG | OPT_SPEC |
+                        OPT_EXPERT | OPT_OUTPUT | OPT_INPUT,         { .off = OFFSET(codec_tags) },
+        "force codec tag/fourcc", "fourcc/tag" },
+    { "q",              HAS_ARG | OPT_EXPERT | OPT_DOUBLE |
+                        OPT_SPEC | OPT_OUTPUT,                       { .off = OFFSET(qscale) },
+        "use fixed quality scale (VBR)", "q" },
+    { "qscale",         HAS_ARG | OPT_EXPERT | OPT_DOUBLE |
+                        OPT_SPEC | OPT_OUTPUT,                       { .off = OFFSET(qscale) },
+        "use fixed quality scale (VBR)", "q" },
+    { "b",              HAS_ARG | OPT_INT | OPT_SPEC | OPT_OUTPUT,    { .off = OFFSET(bitrates) },
+        "set stream bitrate in bits/second", "bitrate" },
+    { "filter",         HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(filters) },
+        "set stream filterchain", "filter_list" },
+    { "filter_script",  HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(filter_scripts) },
+        "read stream filtergraph description from a file", "filename" },
+    { "filter_complex", HAS_ARG | OPT_EXPERT,                        { .func_arg = opt_filter_complex },
+        "create a complex filtergraph", "graph_description" },
+    { "filter_complex_script", HAS_ARG | OPT_EXPERT,                 { .func_arg = opt_filter_complex_script },
+        "read complex filtergraph description from a file", "filename" },
+    { "stats",          OPT_BOOL,                                    { &print_stats },
+        "print progress report during encoding", },
+    { "attach",         HAS_ARG | OPT_PERFILE | OPT_EXPERT |
+                        OPT_OUTPUT,                                  { .func_arg = opt_attach },
+        "add an attachment to the output file", "filename" },
+    { "dump_attachment", HAS_ARG | OPT_STRING | OPT_SPEC |
+                         OPT_EXPERT | OPT_INPUT,                     { .off = OFFSET(dump_attachment) },
+        "extract an attachment into a file", "filename" },
+    { "loop", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_INPUT |
+                        OPT_OFFSET,                                  { .off = OFFSET(loop) }, "set number of times input stream shall be looped", "loop count" },
+
+    /* video options */
+    { "vframes",      OPT_VIDEO | HAS_ARG  | OPT_PERFILE | OPT_OUTPUT,           { .func_arg = opt_video_frames },
+        "set the number of video frames to record", "number" },
+    { "r",            OPT_VIDEO | HAS_ARG  | OPT_STRING | OPT_SPEC |
+                      OPT_INPUT | OPT_OUTPUT,                                    { .off = OFFSET(frame_rates) },
+        "set frame rate (Hz value, fraction or abbreviation)", "rate" },
+    { "s",            OPT_VIDEO | HAS_ARG  | OPT_STRING | OPT_SPEC |
+                      OPT_INPUT | OPT_OUTPUT,                                    { .off = OFFSET(frame_sizes) },
+        "set frame size (WxH or abbreviation)", "size" },
+    { "aspect",       OPT_VIDEO | HAS_ARG  | OPT_STRING | OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(frame_aspect_ratios) },
+        "set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)", "aspect" },
+    { "pix_fmt",      OPT_VIDEO | HAS_ARG | OPT_EXPERT  | OPT_STRING | OPT_SPEC |
+                      OPT_INPUT | OPT_OUTPUT,                                    { .off = OFFSET(frame_pix_fmts) },
+        "set pixel format", "format" },
+    { "vn",           OPT_VIDEO | OPT_BOOL  | OPT_OFFSET | OPT_OUTPUT,           { .off = OFFSET(video_disable) },
+        "disable video" },
+    { "vdt",          OPT_VIDEO | OPT_INT | HAS_ARG | OPT_EXPERT ,               { &video_discard },
+        "discard threshold", "n" },
+    { "rc_override",  OPT_VIDEO | HAS_ARG | OPT_EXPERT  | OPT_STRING | OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(rc_overrides) },
+        "rate control override for specific intervals", "override" },
+    { "vcodec",       OPT_VIDEO | HAS_ARG  | OPT_PERFILE | OPT_INPUT |
+                      OPT_OUTPUT,                                                { .func_arg = opt_video_codec },
+        "force video codec ('copy' to copy stream)", "codec" },
+    { "pass",         OPT_VIDEO | HAS_ARG | OPT_SPEC | OPT_INT | OPT_OUTPUT,     { .off = OFFSET(pass) },
+        "select the pass number (1 or 2)", "n" },
+    { "passlogfile",  OPT_VIDEO | HAS_ARG | OPT_STRING | OPT_EXPERT | OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(passlogfiles) },
+        "select two pass log file name prefix", "prefix" },
+    { "vstats",       OPT_VIDEO | OPT_EXPERT ,                                   { .func_arg = &opt_vstats },
+        "dump video coding statistics to file" },
+    { "vstats_file",  OPT_VIDEO | HAS_ARG | OPT_EXPERT ,                         { .func_arg = opt_vstats_file },
+        "dump video coding statistics to file", "file" },
+    { "vf",           OPT_VIDEO | HAS_ARG  | OPT_PERFILE | OPT_OUTPUT,           { .func_arg = opt_video_filters },
+        "video filters", "filter list" },
+    { "intra_matrix", OPT_VIDEO | HAS_ARG | OPT_EXPERT  | OPT_STRING | OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(intra_matrices) },
+        "specify intra matrix coeffs", "matrix" },
+    { "inter_matrix", OPT_VIDEO | HAS_ARG | OPT_EXPERT  | OPT_STRING | OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(inter_matrices) },
+        "specify inter matrix coeffs", "matrix" },
+    { "top",          OPT_VIDEO | HAS_ARG | OPT_EXPERT  | OPT_INT| OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(top_field_first) },
+        "top=1/bottom=0/auto=-1 field first", "" },
+    { "dc",           OPT_VIDEO | OPT_INT | HAS_ARG | OPT_EXPERT ,               { &intra_dc_precision },
+        "intra_dc_precision", "precision" },
+    { "vtag",         OPT_VIDEO | HAS_ARG | OPT_EXPERT  | OPT_PERFILE |
+                      OPT_OUTPUT,                                                { .func_arg = opt_video_tag },
+        "force video tag/fourcc", "fourcc/tag" },
+    { "qphist",       OPT_VIDEO | OPT_BOOL | OPT_EXPERT ,                        { &qp_hist },
+        "show QP histogram" },
+    { "force_fps",    OPT_VIDEO | OPT_BOOL | OPT_EXPERT  | OPT_SPEC |
+                      OPT_OUTPUT,                                                { .off = OFFSET(force_fps) },
+        "force the selected framerate, disable the best supported framerate selection" },
+    { "streamid",     OPT_VIDEO | HAS_ARG | OPT_EXPERT | OPT_PERFILE |
+                      OPT_OUTPUT,                                                { .func_arg = opt_streamid },
+        "set the value of an outfile streamid", "streamIndex:value" },
+    { "force_key_frames", OPT_VIDEO | OPT_STRING | HAS_ARG | OPT_EXPERT |
+                          OPT_SPEC | OPT_OUTPUT,                                 { .off = OFFSET(forced_key_frames) },
+        "force key frames at specified timestamps", "timestamps" },
+    { "hwaccel",          OPT_VIDEO | OPT_STRING | HAS_ARG | OPT_EXPERT |
+                          OPT_SPEC | OPT_INPUT,                                  { .off = OFFSET(hwaccels) },
+        "use HW accelerated decoding", "hwaccel name" },
+    { "hwaccel_device",   OPT_VIDEO | OPT_STRING | HAS_ARG | OPT_EXPERT |
+                          OPT_SPEC | OPT_INPUT,                                  { .off = OFFSET(hwaccel_devices) },
+        "select a device for HW acceleration", "devicename" },
+    { "hwaccel_output_format", OPT_VIDEO | OPT_STRING | HAS_ARG | OPT_EXPERT |
+                          OPT_SPEC | OPT_INPUT,                                  { .off = OFFSET(hwaccel_output_formats) },
+        "select output format used with HW accelerated decoding", "format" },
+
+    { "hwaccels",         OPT_EXIT,                                              { .func_arg = show_hwaccels },
+        "show available HW acceleration methods" },
+    { "autorotate",       HAS_ARG | OPT_BOOL | OPT_SPEC |
+                          OPT_EXPERT | OPT_INPUT,                                { .off = OFFSET(autorotate) },
+        "automatically insert correct rotate filters" },
+    { "hwaccel_lax_profile_check", OPT_BOOL | OPT_EXPERT,                        { &hwaccel_lax_profile_check},
+        "attempt to decode anyway if HW accelerated decoder's supported profiles do not exactly match the stream" },
+
+    /* audio options */
+    { "aframes",        OPT_AUDIO | HAS_ARG  | OPT_PERFILE | OPT_OUTPUT,           { .func_arg = opt_audio_frames },
+        "set the number of audio frames to record", "number" },
+    { "aq",             OPT_AUDIO | HAS_ARG  | OPT_PERFILE | OPT_OUTPUT,           { .func_arg = opt_audio_qscale },
+        "set audio quality (codec-specific)", "quality", },
+    { "ar",             OPT_AUDIO | HAS_ARG  | OPT_INT | OPT_SPEC |
+                        OPT_INPUT | OPT_OUTPUT,                                    { .off = OFFSET(audio_sample_rate) },
+        "set audio sampling rate (in Hz)", "rate" },
+    { "ac",             OPT_AUDIO | HAS_ARG  | OPT_INT | OPT_SPEC |
+                        OPT_INPUT | OPT_OUTPUT,                                    { .off = OFFSET(audio_channels) },
+        "set number of audio channels", "channels" },
+    { "an",             OPT_AUDIO | OPT_BOOL | OPT_OFFSET | OPT_OUTPUT,            { .off = OFFSET(audio_disable) },
+        "disable audio" },
+    { "acodec",         OPT_AUDIO | HAS_ARG  | OPT_PERFILE |
+                        OPT_INPUT | OPT_OUTPUT,                                    { .func_arg = opt_audio_codec },
+        "force audio codec ('copy' to copy stream)", "codec" },
+    { "atag",           OPT_AUDIO | HAS_ARG  | OPT_EXPERT | OPT_PERFILE |
+                        OPT_OUTPUT,                                                { .func_arg = opt_audio_tag },
+        "force audio tag/fourcc", "fourcc/tag" },
+    { "vol",            OPT_AUDIO | HAS_ARG  | OPT_INT,                            { &audio_volume },
+        "change audio volume (256=normal)" , "volume" },
+    { "sample_fmt",     OPT_AUDIO | HAS_ARG  | OPT_EXPERT | OPT_SPEC |
+                        OPT_STRING | OPT_INPUT | OPT_OUTPUT,                       { .off = OFFSET(sample_fmts) },
+        "set sample format", "format" },
+    { "channel_layout", OPT_AUDIO | HAS_ARG  | OPT_EXPERT | OPT_PERFILE |
+                        OPT_INPUT | OPT_OUTPUT,                                    { .func_arg = opt_channel_layout },
+        "set channel layout", "layout" },
+    { "af",             OPT_AUDIO | HAS_ARG  | OPT_PERFILE | OPT_OUTPUT,           { .func_arg = opt_audio_filters },
+        "audio filters", "filter list" },
+
+    /* subtitle options */
+    { "sn",     OPT_SUBTITLE | OPT_BOOL | OPT_OFFSET | OPT_OUTPUT, { .off = OFFSET(subtitle_disable) },
+        "disable subtitle" },
+    { "scodec", OPT_SUBTITLE | HAS_ARG  | OPT_PERFILE | OPT_INPUT | OPT_OUTPUT, { .func_arg = opt_subtitle_codec },
+        "force subtitle codec ('copy' to copy stream)", "codec" },
+    { "stag",   OPT_SUBTITLE | HAS_ARG  | OPT_EXPERT  | OPT_PERFILE | OPT_OUTPUT, { .func_arg = opt_subtitle_tag }
+        , "force subtitle tag/fourcc", "fourcc/tag" },
+
+    /* grab options */
+    { "isync", OPT_BOOL | OPT_EXPERT, { &input_sync }, "this option is deprecated and does nothing", "" },
+
+    /* muxer options */
+    { "muxdelay",   OPT_FLOAT | HAS_ARG | OPT_EXPERT | OPT_OFFSET | OPT_OUTPUT, { .off = OFFSET(mux_max_delay) },
+        "set the maximum demux-decode delay", "seconds" },
+    { "muxpreload", OPT_FLOAT | HAS_ARG | OPT_EXPERT | OPT_OFFSET | OPT_OUTPUT, { .off = OFFSET(mux_preload) },
+        "set the initial demux-decode delay", "seconds" },
+
+    { "bsf", HAS_ARG | OPT_STRING | OPT_SPEC | OPT_EXPERT | OPT_OUTPUT, { .off = OFFSET(bitstream_filters) },
+        "A comma-separated list of bitstream filters", "bitstream_filters" },
+
+    { "max_muxing_queue_size", HAS_ARG | OPT_INT | OPT_SPEC | OPT_EXPERT | OPT_OUTPUT, { .off = OFFSET(max_muxing_queue_size) },
+        "maximum number of packets that can be buffered while waiting for all streams to initialize", "packets" },
+
+    /* data codec support */
+    { "dcodec", HAS_ARG | OPT_DATA | OPT_PERFILE | OPT_EXPERT | OPT_INPUT | OPT_OUTPUT, { .func_arg = opt_data_codec },
+        "force data codec ('copy' to copy stream)", "codec" },
+
+#if CONFIG_VAAPI
+    { "vaapi_device", HAS_ARG | OPT_EXPERT, { .func_arg = opt_vaapi_device },
+        "set VAAPI hardware device (DRM path or X11 display name)", "device" },
+#endif
+
+    { NULL, },
+};
diff --git a/avtools/avconv_qsv.c b/avtools/avconv_qsv.c
new file mode 100644
index 0000000000..723c6e0224
--- /dev/null
+++ b/avtools/avconv_qsv.c
@@ -0,0 +1,96 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <mfx/mfxvideo.h>
+#include <stdlib.h>
+
+#include "libavutil/dict.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_qsv.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavcodec/qsv.h"
+
+#include "avconv.h"
+
+static int qsv_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
+{
+    InputStream *ist = s->opaque;
+
+    return av_hwframe_get_buffer(ist->hw_frames_ctx, frame, 0);
+}
+
+static void qsv_uninit(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+    av_buffer_unref(&ist->hw_frames_ctx);
+}
+
+static int qsv_device_init(InputStream *ist)
+{
+    int err;
+
+    err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV,
+                                 ist->hwaccel_device, NULL, 0);
+    if (err < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Error creating a QSV device\n");
+        return err;
+    }
+
+    return 0;
+}
+
+int qsv_init(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+    AVHWFramesContext *frames_ctx;
+    AVQSVFramesContext *frames_hwctx;
+    int ret;
+
+    if (!hw_device_ctx) {
+        ret = qsv_device_init(ist);
+        if (ret < 0)
+            return ret;
+    }
+
+    av_buffer_unref(&ist->hw_frames_ctx);
+    ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
+    if (!ist->hw_frames_ctx)
+        return AVERROR(ENOMEM);
+
+    frames_ctx   = (AVHWFramesContext*)ist->hw_frames_ctx->data;
+    frames_hwctx = frames_ctx->hwctx;
+
+    frames_ctx->width             = FFALIGN(s->coded_width,  32);
+    frames_ctx->height            = FFALIGN(s->coded_height, 32);
+    frames_ctx->format            = AV_PIX_FMT_QSV;
+    frames_ctx->sw_format         = s->sw_pix_fmt;
+    frames_ctx->initial_pool_size = 32;
+    frames_hwctx->frame_type      = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
+
+    ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Error initializing a QSV frame pool\n");
+        return ret;
+    }
+
+    ist->hwaccel_get_buffer = qsv_get_buffer;
+    ist->hwaccel_uninit     = qsv_uninit;
+
+    return 0;
+}
diff --git a/avtools/avconv_vaapi.c b/avtools/avconv_vaapi.c
new file mode 100644
index 0000000000..584b8b4df0
--- /dev/null
+++ b/avtools/avconv_vaapi.c
@@ -0,0 +1,231 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/frame.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/log.h"
+
+#include "avconv.h"
+
+
+static AVClass vaapi_class = {
+    .class_name = "vaapi",
+    .item_name  = av_default_item_name,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+#define DEFAULT_SURFACES 20
+
+typedef struct VAAPIDecoderContext {
+    const AVClass *class;
+
+    AVBufferRef       *device_ref;
+    AVHWDeviceContext *device;
+    AVBufferRef       *frames_ref;
+    AVHWFramesContext *frames;
+
+    // The output need not have the same format, width and height as the
+    // decoded frames - the copy for non-direct-mapped access is actually
+    // a whole vpp instance which can do arbitrary scaling and format
+    // conversion.
+    enum AVPixelFormat output_format;
+} VAAPIDecoderContext;
+
+
+static int vaapi_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
+{
+    InputStream *ist = avctx->opaque;
+    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
+    int err;
+
+    err = av_hwframe_get_buffer(ctx->frames_ref, frame, 0);
+    if (err < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to allocate decoder surface.\n");
+    } else {
+        av_log(ctx, AV_LOG_DEBUG, "Decoder given surface %#x.\n",
+               (unsigned int)(uintptr_t)frame->data[3]);
+    }
+    return err;
+}
+
+static int vaapi_retrieve_data(AVCodecContext *avctx, AVFrame *input)
+{
+    InputStream *ist = avctx->opaque;
+    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
+    AVFrame *output = 0;
+    int err;
+
+    av_assert0(input->format == AV_PIX_FMT_VAAPI);
+
+    if (ctx->output_format == AV_PIX_FMT_VAAPI) {
+        // Nothing to do.
+        return 0;
+    }
+
+    av_log(ctx, AV_LOG_DEBUG, "Retrieve data from surface %#x.\n",
+           (unsigned int)(uintptr_t)input->data[3]);
+
+    output = av_frame_alloc();
+    if (!output)
+        return AVERROR(ENOMEM);
+
+    output->format = ctx->output_format;
+
+    err = av_hwframe_transfer_data(output, input, 0);
+    if (err < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to transfer data to "
+               "output frame: %d.\n", err);
+        goto fail;
+    }
+
+    err = av_frame_copy_props(output, input);
+    if (err < 0) {
+        av_frame_unref(output);
+        goto fail;
+    }
+
+    av_frame_unref(input);
+    av_frame_move_ref(input, output);
+    av_frame_free(&output);
+
+    return 0;
+
+fail:
+    if (output)
+        av_frame_free(&output);
+    return err;
+}
+
+static void vaapi_decode_uninit(AVCodecContext *avctx)
+{
+    InputStream *ist = avctx->opaque;
+    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
+
+    if (ctx) {
+        av_buffer_unref(&ctx->frames_ref);
+        av_buffer_unref(&ctx->device_ref);
+        av_free(ctx);
+    }
+
+    av_buffer_unref(&ist->hw_frames_ctx);
+
+    ist->hwaccel_ctx           = NULL;
+    ist->hwaccel_uninit        = NULL;
+    ist->hwaccel_get_buffer    = NULL;
+    ist->hwaccel_retrieve_data = NULL;
+}
+
+int vaapi_decode_init(AVCodecContext *avctx)
+{
+    InputStream *ist = avctx->opaque;
+    VAAPIDecoderContext *ctx;
+    int err;
+    int loglevel = (ist->hwaccel_id != HWACCEL_VAAPI ? AV_LOG_VERBOSE
+                                                     : AV_LOG_ERROR);
+
+    if (ist->hwaccel_ctx)
+        vaapi_decode_uninit(avctx);
+
+    // We have -hwaccel without -vaapi_device, so just initialise here with
+    // the device passed as -hwaccel_device (if -vaapi_device was passed, it
+    // will always have been called before now).
+    if (!hw_device_ctx) {
+        err = vaapi_device_init(ist->hwaccel_device);
+        if (err < 0)
+            return err;
+    }
+
+    ctx = av_mallocz(sizeof(*ctx));
+    if (!ctx)
+        return AVERROR(ENOMEM);
+    ctx->class = &vaapi_class;
+
+    ctx->device_ref = av_buffer_ref(hw_device_ctx);
+    ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
+
+    ctx->output_format = ist->hwaccel_output_format;
+    avctx->pix_fmt = ctx->output_format;
+
+    ctx->frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
+    if (!ctx->frames_ref) {
+        av_log(ctx, loglevel, "Failed to create VAAPI frame context.\n");
+        err = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    ctx->frames = (AVHWFramesContext*)ctx->frames_ref->data;
+
+    ctx->frames->format = AV_PIX_FMT_VAAPI;
+    ctx->frames->width  = avctx->coded_width;
+    ctx->frames->height = avctx->coded_height;
+
+    // It would be nice if we could query the available formats here,
+    // but unfortunately we don't have a VAConfigID to do it with.
+    // For now, just assume an NV12 format (or P010 if 10-bit).
+    ctx->frames->sw_format = (avctx->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ?
+                              AV_PIX_FMT_P010 : AV_PIX_FMT_NV12);
+
+    // For frame-threaded decoding, at least one additional surface
+    // is needed for each thread.
+    ctx->frames->initial_pool_size = DEFAULT_SURFACES;
+    if (avctx->active_thread_type & FF_THREAD_FRAME)
+        ctx->frames->initial_pool_size += avctx->thread_count;
+
+    err = av_hwframe_ctx_init(ctx->frames_ref);
+    if (err < 0) {
+        av_log(ctx, loglevel, "Failed to initialise VAAPI frame "
+               "context: %d\n", err);
+        goto fail;
+    }
+
+    ist->hw_frames_ctx = av_buffer_ref(ctx->frames_ref);
+    if (!ist->hw_frames_ctx) {
+        err = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    ist->hwaccel_ctx           = ctx;
+    ist->hwaccel_uninit        = &vaapi_decode_uninit;
+    ist->hwaccel_get_buffer    = &vaapi_get_buffer;
+    ist->hwaccel_retrieve_data = &vaapi_retrieve_data;
+
+    return 0;
+
+fail:
+    vaapi_decode_uninit(avctx);
+    return err;
+}
+
+static AVClass *vaapi_log = &vaapi_class;
+
+av_cold int vaapi_device_init(const char *device)
+{
+    int err;
+
+    err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,
+                                 device, NULL, 0);
+    if (err < 0) {
+        av_log(&vaapi_log, AV_LOG_ERROR, "Failed to create a VAAPI device\n");
+        return err;
+    }
+
+    return 0;
+}
diff --git a/avtools/avconv_vda.c b/avtools/avconv_vda.c
new file mode 100644
index 0000000000..d86076e79e
--- /dev/null
+++ b/avtools/avconv_vda.c
@@ -0,0 +1,136 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavcodec/avcodec.h"
+#include "libavcodec/vda.h"
+#include "libavutil/imgutils.h"
+
+#include "avconv.h"
+
+typedef struct VDAContext {
+    AVFrame *tmp_frame;
+} VDAContext;
+
+static int vda_retrieve_data(AVCodecContext *s, AVFrame *frame)
+{
+    InputStream *ist = s->opaque;
+    VDAContext  *vda = ist->hwaccel_ctx;
+    CVPixelBufferRef pixbuf = (CVPixelBufferRef)frame->data[3];
+    OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
+    CVReturn err;
+    uint8_t *data[4] = { 0 };
+    int linesize[4] = { 0 };
+    int planes, ret, i;
+
+    av_frame_unref(vda->tmp_frame);
+
+    switch (pixel_format) {
+    case kCVPixelFormatType_420YpCbCr8Planar: vda->tmp_frame->format = AV_PIX_FMT_YUV420P; break;
+    case kCVPixelFormatType_422YpCbCr8:       vda->tmp_frame->format = AV_PIX_FMT_UYVY422; break;
+    default:
+        av_log(NULL, AV_LOG_ERROR,
+               "Unsupported pixel format: %u\n", pixel_format);
+        return AVERROR(ENOSYS);
+    }
+
+    vda->tmp_frame->width  = frame->width;
+    vda->tmp_frame->height = frame->height;
+    ret = av_frame_get_buffer(vda->tmp_frame, 32);
+    if (ret < 0)
+        return ret;
+
+    err = CVPixelBufferLockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
+    if (err != kCVReturnSuccess) {
+        av_log(NULL, AV_LOG_ERROR, "Error locking the pixel buffer.\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    if (CVPixelBufferIsPlanar(pixbuf)) {
+
+        planes = CVPixelBufferGetPlaneCount(pixbuf);
+        for (i = 0; i < planes; i++) {
+            data[i]     = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
+            linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
+        }
+    } else {
+        data[0] = CVPixelBufferGetBaseAddress(pixbuf);
+        linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
+    }
+
+    av_image_copy(vda->tmp_frame->data, vda->tmp_frame->linesize,
+                  data, linesize, vda->tmp_frame->format,
+                  frame->width, frame->height);
+
+    CVPixelBufferUnlockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
+
+    ret = av_frame_copy_props(vda->tmp_frame, frame);
+    if (ret < 0)
+        return ret;
+
+    av_frame_unref(frame);
+    av_frame_move_ref(frame, vda->tmp_frame);
+
+    return 0;
+}
+
+static void vda_uninit(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+    VDAContext  *vda = ist->hwaccel_ctx;
+
+    ist->hwaccel_uninit        = NULL;
+    ist->hwaccel_retrieve_data = NULL;
+
+    av_frame_free(&vda->tmp_frame);
+
+    av_vda_default_free(s);
+    av_freep(&ist->hwaccel_ctx);
+}
+
+int vda_init(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    VDAContext *vda;
+    int ret;
+
+    vda = av_mallocz(sizeof(*vda));
+    if (!vda)
+        return AVERROR(ENOMEM);
+
+    ist->hwaccel_ctx           = vda;
+    ist->hwaccel_uninit        = vda_uninit;
+    ist->hwaccel_retrieve_data = vda_retrieve_data;
+
+    vda->tmp_frame = av_frame_alloc();
+    if (!vda->tmp_frame) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    ret = av_vda_default_init(s);
+    if (ret < 0) {
+        av_log(NULL, loglevel, "Error creating VDA decoder.\n");
+        goto fail;
+    }
+
+    return 0;
+fail:
+    vda_uninit(s);
+    return ret;
+}
diff --git a/avtools/avconv_vdpau.c b/avtools/avconv_vdpau.c
new file mode 100644
index 0000000000..5fedceef95
--- /dev/null
+++ b/avtools/avconv_vdpau.c
@@ -0,0 +1,159 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "avconv.h"
+
+#include "libavcodec/vdpau.h"
+
+#include "libavutil/buffer.h"
+#include "libavutil/frame.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_vdpau.h"
+#include "libavutil/pixfmt.h"
+
+typedef struct VDPAUContext {
+    AVBufferRef *hw_frames_ctx;
+    AVFrame *tmp_frame;
+} VDPAUContext;
+
+static void vdpau_uninit(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    VDPAUContext *ctx = ist->hwaccel_ctx;
+
+    ist->hwaccel_uninit        = NULL;
+    ist->hwaccel_get_buffer    = NULL;
+    ist->hwaccel_retrieve_data = NULL;
+
+    av_buffer_unref(&ctx->hw_frames_ctx);
+    av_frame_free(&ctx->tmp_frame);
+
+    av_freep(&ist->hwaccel_ctx);
+    av_freep(&s->hwaccel_context);
+}
+
+static int vdpau_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
+{
+    InputStream         *ist = s->opaque;
+    VDPAUContext        *ctx = ist->hwaccel_ctx;
+
+    return av_hwframe_get_buffer(ctx->hw_frames_ctx, frame, 0);
+}
+
+static int vdpau_retrieve_data(AVCodecContext *s, AVFrame *frame)
+{
+    InputStream        *ist = s->opaque;
+    VDPAUContext       *ctx = ist->hwaccel_ctx;
+    int ret;
+
+    ret = av_hwframe_transfer_data(ctx->tmp_frame, frame, 0);
+    if (ret < 0)
+        return ret;
+
+    ret = av_frame_copy_props(ctx->tmp_frame, frame);
+    if (ret < 0) {
+        av_frame_unref(ctx->tmp_frame);
+        return ret;
+    }
+
+    av_frame_unref(frame);
+    av_frame_move_ref(frame, ctx->tmp_frame);
+
+    return 0;
+}
+
+static int vdpau_alloc(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    VDPAUContext *ctx;
+    int ret;
+
+    AVBufferRef          *device_ref = NULL;
+    AVHWDeviceContext    *device_ctx;
+    AVVDPAUDeviceContext *device_hwctx;
+    AVHWFramesContext    *frames_ctx;
+
+    ctx = av_mallocz(sizeof(*ctx));
+    if (!ctx)
+        return AVERROR(ENOMEM);
+
+    ist->hwaccel_ctx           = ctx;
+    ist->hwaccel_uninit        = vdpau_uninit;
+    ist->hwaccel_get_buffer    = vdpau_get_buffer;
+    ist->hwaccel_retrieve_data = vdpau_retrieve_data;
+
+    ctx->tmp_frame = av_frame_alloc();
+    if (!ctx->tmp_frame)
+        goto fail;
+
+    ret = av_hwdevice_ctx_create(&device_ref, AV_HWDEVICE_TYPE_VDPAU,
+                                 ist->hwaccel_device, NULL, 0);
+    if (ret < 0)
+        goto fail;
+    device_ctx   = (AVHWDeviceContext*)device_ref->data;
+    device_hwctx = device_ctx->hwctx;
+
+    ctx->hw_frames_ctx = av_hwframe_ctx_alloc(device_ref);
+    if (!ctx->hw_frames_ctx)
+        goto fail;
+    av_buffer_unref(&device_ref);
+
+    frames_ctx            = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
+    frames_ctx->format    = AV_PIX_FMT_VDPAU;
+    frames_ctx->sw_format = s->sw_pix_fmt;
+    frames_ctx->width     = s->coded_width;
+    frames_ctx->height    = s->coded_height;
+
+    ret = av_hwframe_ctx_init(ctx->hw_frames_ctx);
+    if (ret < 0)
+        goto fail;
+
+    if (av_vdpau_bind_context(s, device_hwctx->device, device_hwctx->get_proc_address, 0))
+        goto fail;
+
+    av_log(NULL, AV_LOG_VERBOSE, "Using VDPAU to decode input stream #%d:%d.\n",
+           ist->file_index, ist->st->index);
+
+    return 0;
+
+fail:
+    av_log(NULL, loglevel, "VDPAU init failed for stream #%d:%d.\n",
+           ist->file_index, ist->st->index);
+    av_buffer_unref(&device_ref);
+    vdpau_uninit(s);
+    return AVERROR(EINVAL);
+}
+
+int vdpau_init(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+
+    if (!ist->hwaccel_ctx) {
+        int ret = vdpau_alloc(s);
+        if (ret < 0)
+            return ret;
+    }
+
+    ist->hwaccel_get_buffer    = vdpau_get_buffer;
+    ist->hwaccel_retrieve_data = vdpau_retrieve_data;
+
+    return 0;
+}
diff --git a/avtools/avplay.c b/avtools/avplay.c
new file mode 100644
index 0000000000..18879e16bc
--- /dev/null
+++ b/avtools/avplay.c
@@ -0,0 +1,3061 @@
+/*
+ * avplay : Simple Media Player based on the Libav libraries
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include <inttypes.h>
+#include <math.h>
+#include <limits.h>
+#include <stdint.h>
+
+#include "libavutil/avstring.h"
+#include "libavutil/colorspace.h"
+#include "libavutil/display.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/dict.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/samplefmt.h"
+#include "libavutil/time.h"
+#include "libavformat/avformat.h"
+#include "libavdevice/avdevice.h"
+#include "libavresample/avresample.h"
+#include "libavutil/opt.h"
+#include "libavcodec/avfft.h"
+
+#include "libavfilter/avfilter.h"
+#include "libavfilter/buffersink.h"
+#include "libavfilter/buffersrc.h"
+
+#include "cmdutils.h"
+
+#include <SDL.h>
+#include <SDL_thread.h>
+
+#ifdef __MINGW32__
+#undef main /* We don't want SDL to override our main() */
+#endif
+
+#include <assert.h>
+
+const char program_name[] = "avplay";
+const int program_birth_year = 2003;
+
+#define MAX_QUEUE_SIZE (15 * 1024 * 1024)
+#define MIN_AUDIOQ_SIZE (20 * 16 * 1024)
+#define MIN_FRAMES 5
+
+/* SDL audio buffer size, in samples. Should be small to have precise
+   A/V sync as SDL does not have hardware buffer fullness info. */
+#define SDL_AUDIO_BUFFER_SIZE 1024
+
+/* no AV sync correction is done if below the AV sync threshold */
+#define AV_SYNC_THRESHOLD 0.01
+/* no AV correction is done if too big error */
+#define AV_NOSYNC_THRESHOLD 10.0
+
+#define FRAME_SKIP_FACTOR 0.05
+
+/* maximum audio speed change to get correct sync */
+#define SAMPLE_CORRECTION_PERCENT_MAX 10
+
+/* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
+#define AUDIO_DIFF_AVG_NB   20
+
+/* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
+#define SAMPLE_ARRAY_SIZE (2 * 65536)
+
+static int64_t sws_flags = SWS_BICUBIC;
+
+typedef struct PacketQueue {
+    AVPacketList *first_pkt, *last_pkt;
+    int nb_packets;
+    int size;
+    int abort_request;
+    SDL_mutex *mutex;
+    SDL_cond *cond;
+} PacketQueue;
+
+#define VIDEO_PICTURE_QUEUE_SIZE 2
+#define SUBPICTURE_QUEUE_SIZE 4
+
+typedef struct VideoPicture {
+    double pts;             // presentation timestamp for this picture
+    double target_clock;    // av_gettime_relative() time at which this should be displayed ideally
+    int64_t pos;            // byte position in file
+    SDL_Overlay *bmp;
+    int width, height; /* source height & width */
+    int allocated;
+    int reallocate;
+    enum AVPixelFormat pix_fmt;
+
+    AVRational sar;
+} VideoPicture;
+
+typedef struct SubPicture {
+    double pts; /* presentation time stamp for this picture */
+    AVSubtitle sub;
+} SubPicture;
+
+enum {
+    AV_SYNC_AUDIO_MASTER, /* default choice */
+    AV_SYNC_VIDEO_MASTER,
+    AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
+};
+
+typedef struct PlayerState {
+    SDL_Thread *parse_tid;
+    SDL_Thread *video_tid;
+    SDL_Thread *refresh_tid;
+    AVInputFormat *iformat;
+    int no_background;
+    int abort_request;
+    int paused;
+    int last_paused;
+    int seek_req;
+    int seek_flags;
+    int64_t seek_pos;
+    int64_t seek_rel;
+    int read_pause_return;
+    AVFormatContext *ic;
+
+    int audio_stream;
+
+    int av_sync_type;
+    double external_clock; /* external clock base */
+    int64_t external_clock_time;
+
+    double audio_clock;
+    double audio_diff_cum; /* used for AV difference average computation */
+    double audio_diff_avg_coef;
+    double audio_diff_threshold;
+    int audio_diff_avg_count;
+    AVStream *audio_st;
+    AVCodecContext *audio_dec;
+    PacketQueue audioq;
+    int audio_hw_buf_size;
+    uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
+    uint8_t *audio_buf;
+    uint8_t *audio_buf1;
+    unsigned int audio_buf_size; /* in bytes */
+    int audio_buf_index; /* in bytes */
+    AVPacket audio_pkt_temp;
+    AVPacket audio_pkt;
+    enum AVSampleFormat sdl_sample_fmt;
+    uint64_t sdl_channel_layout;
+    int sdl_channels;
+    int sdl_sample_rate;
+    enum AVSampleFormat resample_sample_fmt;
+    uint64_t resample_channel_layout;
+    int resample_sample_rate;
+    AVAudioResampleContext *avr;
+    AVFrame *frame;
+
+    int show_audio; /* if true, display audio samples */
+    int16_t sample_array[SAMPLE_ARRAY_SIZE];
+    int sample_array_index;
+    int last_i_start;
+    RDFTContext *rdft;
+    int rdft_bits;
+    FFTSample *rdft_data;
+    int xpos;
+
+    SDL_Thread *subtitle_tid;
+    int subtitle_stream;
+    int subtitle_stream_changed;
+    AVStream *subtitle_st;
+    AVCodecContext *subtitle_dec;
+    PacketQueue subtitleq;
+    SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
+    int subpq_size, subpq_rindex, subpq_windex;
+    SDL_mutex *subpq_mutex;
+    SDL_cond *subpq_cond;
+
+    double frame_timer;
+    double frame_last_pts;
+    double frame_last_delay;
+    double video_clock;             // pts of last decoded frame / predicted pts of next decoded frame
+    int video_stream;
+    AVStream *video_st;
+    AVCodecContext *video_dec;
+    PacketQueue videoq;
+    double video_current_pts;       // current displayed pts (different from video_clock if frame fifos are used)
+    double video_current_pts_drift; // video_current_pts - time (av_gettime_relative) at which we updated video_current_pts - used to have running video pts
+    int64_t video_current_pos;      // current displayed file pos
+    VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
+    int pictq_size, pictq_rindex, pictq_windex;
+    SDL_mutex *pictq_mutex;
+    SDL_cond *pictq_cond;
+
+    //    QETimer *video_timer;
+    char filename[1024];
+    int width, height, xleft, ytop;
+
+    PtsCorrectionContext pts_ctx;
+
+    AVFilterContext *in_video_filter;   // the first filter in the video chain
+    AVFilterContext *out_video_filter;  // the last filter in the video chain
+
+    float skip_frames;
+    float skip_frames_index;
+    int refresh;
+
+    SpecifierOpt *codec_names;
+    int        nb_codec_names;
+} PlayerState;
+
+/* options specified by the user */
+static AVInputFormat *file_iformat;
+static const char *input_filename;
+static const char *window_title;
+static int fs_screen_width;
+static int fs_screen_height;
+static int screen_width  = 0;
+static int screen_height = 0;
+static int audio_disable;
+static int video_disable;
+static int wanted_stream[AVMEDIA_TYPE_NB] = {
+    [AVMEDIA_TYPE_AUDIO]    = -1,
+    [AVMEDIA_TYPE_VIDEO]    = -1,
+    [AVMEDIA_TYPE_SUBTITLE] = -1,
+};
+static int seek_by_bytes = -1;
+static int display_disable;
+static int show_status = 1;
+static int av_sync_type = AV_SYNC_AUDIO_MASTER;
+static int64_t start_time = AV_NOPTS_VALUE;
+static int64_t duration = AV_NOPTS_VALUE;
+static int step = 0;
+static int workaround_bugs = 1;
+static int fast = 0;
+static int genpts = 0;
+static int idct = FF_IDCT_AUTO;
+static enum AVDiscard skip_frame       = AVDISCARD_DEFAULT;
+static enum AVDiscard skip_idct        = AVDISCARD_DEFAULT;
+static enum AVDiscard skip_loop_filter = AVDISCARD_DEFAULT;
+static int error_concealment = 3;
+static int decoder_reorder_pts = -1;
+static int noautoexit;
+static int exit_on_keydown;
+static int exit_on_mousedown;
+static int loop = 1;
+static int framedrop = 1;
+static int infinite_buffer = 0;
+
+static int rdftspeed = 20;
+static char *vfilters = NULL;
+static int autorotate = 1;
+
+/* current context */
+static int is_full_screen;
+static PlayerState player_state;
+static PlayerState *player = &player_state;
+static int64_t audio_callback_time;
+
+static AVPacket flush_pkt;
+
+#define FF_ALLOC_EVENT   (SDL_USEREVENT)
+#define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
+#define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
+
+static SDL_Surface *screen;
+
+static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
+
+/* packet queue handling */
+static void packet_queue_init(PacketQueue *q)
+{
+    memset(q, 0, sizeof(PacketQueue));
+    q->mutex = SDL_CreateMutex();
+    q->cond = SDL_CreateCond();
+    packet_queue_put(q, &flush_pkt);
+}
+
+static void packet_queue_flush(PacketQueue *q)
+{
+    AVPacketList *pkt, *pkt1;
+
+    SDL_LockMutex(q->mutex);
+    for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
+        pkt1 = pkt->next;
+        av_packet_unref(&pkt->pkt);
+        av_freep(&pkt);
+    }
+    q->last_pkt = NULL;
+    q->first_pkt = NULL;
+    q->nb_packets = 0;
+    q->size = 0;
+    SDL_UnlockMutex(q->mutex);
+}
+
+static void packet_queue_end(PacketQueue *q)
+{
+    packet_queue_flush(q);
+    SDL_DestroyMutex(q->mutex);
+    SDL_DestroyCond(q->cond);
+}
+
+static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
+{
+    AVPacketList *pkt1;
+
+    pkt1 = av_malloc(sizeof(AVPacketList));
+    if (!pkt1)
+        return -1;
+    pkt1->pkt = *pkt;
+    pkt1->next = NULL;
+
+
+    SDL_LockMutex(q->mutex);
+
+    if (!q->last_pkt)
+
+        q->first_pkt = pkt1;
+    else
+        q->last_pkt->next = pkt1;
+    q->last_pkt = pkt1;
+    q->nb_packets++;
+    q->size += pkt1->pkt.size + sizeof(*pkt1);
+    /* XXX: should duplicate packet data in DV case */
+    SDL_CondSignal(q->cond);
+
+    SDL_UnlockMutex(q->mutex);
+    return 0;
+}
+
+static void packet_queue_abort(PacketQueue *q)
+{
+    SDL_LockMutex(q->mutex);
+
+    q->abort_request = 1;
+
+    SDL_CondSignal(q->cond);
+
+    SDL_UnlockMutex(q->mutex);
+}
+
+/* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
+static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
+{
+    AVPacketList *pkt1;
+    int ret;
+
+    SDL_LockMutex(q->mutex);
+
+    for (;;) {
+        if (q->abort_request) {
+            ret = -1;
+            break;
+        }
+
+        pkt1 = q->first_pkt;
+        if (pkt1) {
+            q->first_pkt = pkt1->next;
+            if (!q->first_pkt)
+                q->last_pkt = NULL;
+            q->nb_packets--;
+            q->size -= pkt1->pkt.size + sizeof(*pkt1);
+            *pkt = pkt1->pkt;
+            av_free(pkt1);
+            ret = 1;
+            break;
+        } else if (!block) {
+            ret = 0;
+            break;
+        } else {
+            SDL_CondWait(q->cond, q->mutex);
+        }
+    }
+    SDL_UnlockMutex(q->mutex);
+    return ret;
+}
+
+static inline void fill_rectangle(SDL_Surface *screen,
+                                  int x, int y, int w, int h, int color)
+{
+    SDL_Rect rect;
+    rect.x = x;
+    rect.y = y;
+    rect.w = w;
+    rect.h = h;
+    SDL_FillRect(screen, &rect, color);
+}
+
+#define ALPHA_BLEND(a, oldp, newp, s)\
+((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
+
+#define RGBA_IN(r, g, b, a, s)\
+{\
+    unsigned int v = ((const uint32_t *)(s))[0];\
+    a = (v >> 24) & 0xff;\
+    r = (v >> 16) & 0xff;\
+    g = (v >> 8) & 0xff;\
+    b = v & 0xff;\
+}
+
+#define YUVA_IN(y, u, v, a, s, pal)\
+{\
+    unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
+    a = (val >> 24) & 0xff;\
+    y = (val >> 16) & 0xff;\
+    u = (val >> 8) & 0xff;\
+    v = val & 0xff;\
+}
+
+#define YUVA_OUT(d, y, u, v, a)\
+{\
+    ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
+}
+
+
+#define BPP 1
+
+static void blend_subrect(uint8_t *dst[4], uint16_t dst_linesize[4],
+                          const AVSubtitleRect *rect, int imgw, int imgh)
+{
+    int wrap, wrap3, width2, skip2;
+    int y, u, v, a, u1, v1, a1, w, h;
+    uint8_t *lum, *cb, *cr;
+    const uint8_t *p;
+    const uint32_t *pal;
+    int dstx, dsty, dstw, dsth;
+
+    dstw = av_clip(rect->w, 0, imgw);
+    dsth = av_clip(rect->h, 0, imgh);
+    dstx = av_clip(rect->x, 0, imgw - dstw);
+    dsty = av_clip(rect->y, 0, imgh - dsth);
+    /* sdl has U and V inverted */
+    lum = dst[0] +  dsty       * dst_linesize[0];
+    cb  = dst[2] + (dsty >> 1) * dst_linesize[2];
+    cr  = dst[1] + (dsty >> 1) * dst_linesize[1];
+
+    width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
+    skip2 = dstx >> 1;
+    wrap = dst_linesize[0];
+    wrap3 = rect->linesize[0];
+    p = rect->data[0];
+    pal = (const uint32_t *)rect->data[1];  /* Now in YCrCb! */
+
+    if (dsty & 1) {
+        lum += dstx;
+        cb += skip2;
+        cr += skip2;
+
+        if (dstx & 1) {
+            YUVA_IN(y, u, v, a, p, pal);
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
+            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
+            cb++;
+            cr++;
+            lum++;
+            p += BPP;
+        }
+        for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 = u;
+            v1 = v;
+            a1 = a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+
+            YUVA_IN(y, u, v, a, p + BPP, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
+            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
+            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
+            cb++;
+            cr++;
+            p += 2 * BPP;
+            lum += 2;
+        }
+        if (w) {
+            YUVA_IN(y, u, v, a, p, pal);
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
+            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
+            p++;
+            lum++;
+        }
+        p += wrap3 - dstw * BPP;
+        lum += wrap - dstw - dstx;
+        cb += dst_linesize[2] - width2 - skip2;
+        cr += dst_linesize[1] - width2 - skip2;
+    }
+    for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
+        lum += dstx;
+        cb += skip2;
+        cr += skip2;
+
+        if (dstx & 1) {
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 = u;
+            v1 = v;
+            a1 = a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            p += wrap3;
+            lum += wrap;
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
+            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
+            cb++;
+            cr++;
+            p += -wrap3 + BPP;
+            lum += -wrap + 1;
+        }
+        for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 = u;
+            v1 = v;
+            a1 = a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+
+            YUVA_IN(y, u, v, a, p + BPP, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
+            p += wrap3;
+            lum += wrap;
+
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+
+            YUVA_IN(y, u, v, a, p + BPP, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
+
+            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
+            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
+
+            cb++;
+            cr++;
+            p += -wrap3 + 2 * BPP;
+            lum += -wrap + 2;
+        }
+        if (w) {
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 = u;
+            v1 = v;
+            a1 = a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            p += wrap3;
+            lum += wrap;
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
+            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
+            cb++;
+            cr++;
+            p += -wrap3 + BPP;
+            lum += -wrap + 1;
+        }
+        p += wrap3 + (wrap3 - dstw * BPP);
+        lum += wrap + (wrap - dstw - dstx);
+        cb += dst_linesize[2] - width2 - skip2;
+        cr += dst_linesize[1] - width2 - skip2;
+    }
+    /* handle odd height */
+    if (h) {
+        lum += dstx;
+        cb += skip2;
+        cr += skip2;
+
+        if (dstx & 1) {
+            YUVA_IN(y, u, v, a, p, pal);
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
+            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
+            cb++;
+            cr++;
+            lum++;
+            p += BPP;
+        }
+        for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
+            YUVA_IN(y, u, v, a, p, pal);
+            u1 = u;
+            v1 = v;
+            a1 = a;
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+
+            YUVA_IN(y, u, v, a, p + BPP, pal);
+            u1 += u;
+            v1 += v;
+            a1 += a;
+            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
+            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
+            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
+            cb++;
+            cr++;
+            p += 2 * BPP;
+            lum += 2;
+        }
+        if (w) {
+            YUVA_IN(y, u, v, a, p, pal);
+            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
+            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
+            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
+        }
+    }
+}
+
+static void free_subpicture(SubPicture *sp)
+{
+    avsubtitle_free(&sp->sub);
+}
+
+static void video_image_display(PlayerState *is)
+{
+    VideoPicture *vp;
+    SubPicture *sp;
+    float aspect_ratio;
+    int width, height, x, y;
+    SDL_Rect rect;
+    int i;
+
+    vp = &is->pictq[is->pictq_rindex];
+    if (vp->bmp) {
+         if (!vp->sar.num)
+             aspect_ratio = 0;
+         else
+             aspect_ratio = av_q2d(vp->sar);
+        if (aspect_ratio <= 0.0)
+            aspect_ratio = 1.0;
+        aspect_ratio *= (float)vp->width / (float)vp->height;
+
+        if (is->subtitle_st)
+        {
+            if (is->subpq_size > 0)
+            {
+                sp = &is->subpq[is->subpq_rindex];
+
+                if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000))
+                {
+                    SDL_LockYUVOverlay (vp->bmp);
+
+                    for (i = 0; i < sp->sub.num_rects; i++)
+                        blend_subrect(vp->bmp->pixels, vp->bmp->pitches,
+                                      sp->sub.rects[i], vp->bmp->w, vp->bmp->h);
+
+                    SDL_UnlockYUVOverlay (vp->bmp);
+                }
+            }
+        }
+
+
+        /* XXX: we suppose the screen has a 1.0 pixel ratio */
+        height = is->height;
+        width = ((int)rint(height * aspect_ratio)) & ~1;
+        if (width > is->width) {
+            width = is->width;
+            height = ((int)rint(width / aspect_ratio)) & ~1;
+        }
+        x = (is->width - width) / 2;
+        y = (is->height - height) / 2;
+        is->no_background = 0;
+        rect.x = is->xleft + x;
+        rect.y = is->ytop  + y;
+        rect.w = width;
+        rect.h = height;
+        SDL_DisplayYUVOverlay(vp->bmp, &rect);
+    }
+}
+
+/* get the current audio output buffer size, in samples. With SDL, we
+   cannot have a precise information */
+static int audio_write_get_buf_size(PlayerState *is)
+{
+    return is->audio_buf_size - is->audio_buf_index;
+}
+
+static inline int compute_mod(int a, int b)
+{
+    a = a % b;
+    if (a >= 0)
+        return a;
+    else
+        return a + b;
+}
+
+static void video_audio_display(PlayerState *s)
+{
+    int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
+    int ch, channels, h, h2, bgcolor, fgcolor;
+    int16_t time_diff;
+    int rdft_bits, nb_freq;
+
+    for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
+        ;
+    nb_freq = 1 << (rdft_bits - 1);
+
+    /* compute display index : center on currently output samples */
+    channels = s->sdl_channels;
+    nb_display_channels = channels;
+    if (!s->paused) {
+        int data_used = s->show_audio == 1 ? s->width : (2 * nb_freq);
+        n = 2 * channels;
+        delay = audio_write_get_buf_size(s);
+        delay /= n;
+
+        /* to be more precise, we take into account the time spent since
+           the last buffer computation */
+        if (audio_callback_time) {
+            time_diff = av_gettime_relative() - audio_callback_time;
+            delay -= (time_diff * s->sdl_sample_rate) / 1000000;
+        }
+
+        delay += 2 * data_used;
+        if (delay < data_used)
+            delay = data_used;
+
+        i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
+        if (s->show_audio == 1) {
+            h = INT_MIN;
+            for (i = 0; i < 1000; i += channels) {
+                int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
+                int a = s->sample_array[idx];
+                int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
+                int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
+                int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
+                int score = a - d;
+                if (h < score && (b ^ c) < 0) {
+                    h = score;
+                    i_start = idx;
+                }
+            }
+        }
+
+        s->last_i_start = i_start;
+    } else {
+        i_start = s->last_i_start;
+    }
+
+    bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
+    if (s->show_audio == 1) {
+        fill_rectangle(screen,
+                       s->xleft, s->ytop, s->width, s->height,
+                       bgcolor);
+
+        fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
+
+        /* total height for one channel */
+        h = s->height / nb_display_channels;
+        /* graph height / 2 */
+        h2 = (h * 9) / 20;
+        for (ch = 0; ch < nb_display_channels; ch++) {
+            i = i_start + ch;
+            y1 = s->ytop + ch * h + (h / 2); /* position of center line */
+            for (x = 0; x < s->width; x++) {
+                y = (s->sample_array[i] * h2) >> 15;
+                if (y < 0) {
+                    y = -y;
+                    ys = y1 - y;
+                } else {
+                    ys = y1;
+                }
+                fill_rectangle(screen,
+                               s->xleft + x, ys, 1, y,
+                               fgcolor);
+                i += channels;
+                if (i >= SAMPLE_ARRAY_SIZE)
+                    i -= SAMPLE_ARRAY_SIZE;
+            }
+        }
+
+        fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
+
+        for (ch = 1; ch < nb_display_channels; ch++) {
+            y = s->ytop + ch * h;
+            fill_rectangle(screen,
+                           s->xleft, y, s->width, 1,
+                           fgcolor);
+        }
+        SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
+    } else {
+        nb_display_channels= FFMIN(nb_display_channels, 2);
+        if (rdft_bits != s->rdft_bits) {
+            av_rdft_end(s->rdft);
+            av_free(s->rdft_data);
+            s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
+            s->rdft_bits = rdft_bits;
+            s->rdft_data = av_malloc(4 * nb_freq * sizeof(*s->rdft_data));
+        }
+        {
+            FFTSample *data[2];
+            for (ch = 0; ch < nb_display_channels; ch++) {
+                data[ch] = s->rdft_data + 2 * nb_freq * ch;
+                i = i_start + ch;
+                for (x = 0; x < 2 * nb_freq; x++) {
+                    double w = (x-nb_freq) * (1.0 / nb_freq);
+                    data[ch][x] = s->sample_array[i] * (1.0 - w * w);
+                    i += channels;
+                    if (i >= SAMPLE_ARRAY_SIZE)
+                        i -= SAMPLE_ARRAY_SIZE;
+                }
+                av_rdft_calc(s->rdft, data[ch]);
+            }
+            /* Least efficient way to do this, we should of course
+             * directly access it but it is more than fast enough. */
+            for (y = 0; y < s->height; y++) {
+                double w = 1 / sqrt(nb_freq);
+                int a = sqrt(w * sqrt(data[0][2 * y + 0] * data[0][2 * y + 0] + data[0][2 * y + 1] * data[0][2 * y + 1]));
+                int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
+                       + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
+                a = FFMIN(a, 255);
+                b = FFMIN(b, 255);
+                fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
+
+                fill_rectangle(screen,
+                            s->xpos, s->height-y, 1, 1,
+                            fgcolor);
+            }
+        }
+        SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
+        s->xpos++;
+        if (s->xpos >= s->width)
+            s->xpos= s->xleft;
+    }
+}
+
+static int video_open(PlayerState *is)
+{
+    int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
+    int w,h;
+
+    if (is_full_screen) flags |= SDL_FULLSCREEN;
+    else                flags |= SDL_RESIZABLE;
+
+    if (is_full_screen && fs_screen_width) {
+        w = fs_screen_width;
+        h = fs_screen_height;
+    } else if (!is_full_screen && screen_width) {
+        w = screen_width;
+        h = screen_height;
+    } else if (is->out_video_filter && is->out_video_filter->inputs[0]) {
+        w = is->out_video_filter->inputs[0]->w;
+        h = is->out_video_filter->inputs[0]->h;
+    } else {
+        w = 640;
+        h = 480;
+    }
+    if (screen && is->width == screen->w && screen->w == w
+       && is->height== screen->h && screen->h == h)
+        return 0;
+
+#if defined(__APPLE__) && !SDL_VERSION_ATLEAST(1, 2, 14)
+    /* setting bits_per_pixel = 0 or 32 causes blank video on OS X and older SDL */
+    screen = SDL_SetVideoMode(w, h, 24, flags);
+#else
+    screen = SDL_SetVideoMode(w, h, 0, flags);
+#endif
+    if (!screen) {
+        fprintf(stderr, "SDL: could not set video mode - exiting\n");
+        return -1;
+    }
+    if (!window_title)
+        window_title = input_filename;
+    SDL_WM_SetCaption(window_title, window_title);
+
+    is->width  = screen->w;
+    is->height = screen->h;
+
+    return 0;
+}
+
+/* display the current picture, if any */
+static void video_display(PlayerState *is)
+{
+    if (!screen)
+        video_open(player);
+    if (is->audio_st && is->show_audio)
+        video_audio_display(is);
+    else if (is->video_st)
+        video_image_display(is);
+}
+
+static int refresh_thread(void *opaque)
+{
+    PlayerState *is= opaque;
+    while (!is->abort_request) {
+        SDL_Event event;
+        event.type = FF_REFRESH_EVENT;
+        event.user.data1 = opaque;
+        if (!is->refresh) {
+            is->refresh = 1;
+            SDL_PushEvent(&event);
+        }
+        av_usleep(is->audio_st && is->show_audio ? rdftspeed * 1000 : 5000); // FIXME ideally we should wait the correct time but SDLs event passing is so slow it would be silly
+    }
+    return 0;
+}
+
+/* get the current audio clock value */
+static double get_audio_clock(PlayerState *is)
+{
+    double pts;
+    int hw_buf_size, bytes_per_sec;
+    pts = is->audio_clock;
+    hw_buf_size = audio_write_get_buf_size(is);
+    bytes_per_sec = 0;
+    if (is->audio_st) {
+        bytes_per_sec = is->sdl_sample_rate * is->sdl_channels *
+                        av_get_bytes_per_sample(is->sdl_sample_fmt);
+    }
+    if (bytes_per_sec)
+        pts -= (double)hw_buf_size / bytes_per_sec;
+    return pts;
+}
+
+/* get the current video clock value */
+static double get_video_clock(PlayerState *is)
+{
+    if (is->paused) {
+        return is->video_current_pts;
+    } else {
+        return is->video_current_pts_drift + av_gettime_relative() / 1000000.0;
+    }
+}
+
+/* get the current external clock value */
+static double get_external_clock(PlayerState *is)
+{
+    int64_t ti;
+    ti = av_gettime_relative();
+    return is->external_clock + ((ti - is->external_clock_time) * 1e-6);
+}
+
+/* get the current master clock value */
+static double get_master_clock(PlayerState *is)
+{
+    double val;
+
+    if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
+        if (is->video_st)
+            val = get_video_clock(is);
+        else
+            val = get_audio_clock(is);
+    } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
+        if (is->audio_st)
+            val = get_audio_clock(is);
+        else
+            val = get_video_clock(is);
+    } else {
+        val = get_external_clock(is);
+    }
+    return val;
+}
+
+/* seek in the stream */
+static void stream_seek(PlayerState *is, int64_t pos, int64_t rel, int seek_by_bytes)
+{
+    if (!is->seek_req) {
+        is->seek_pos = pos;
+        is->seek_rel = rel;
+        is->seek_flags &= ~AVSEEK_FLAG_BYTE;
+        if (seek_by_bytes)
+            is->seek_flags |= AVSEEK_FLAG_BYTE;
+        is->seek_req = 1;
+    }
+}
+
+/* pause or resume the video */
+static void stream_pause(PlayerState *is)
+{
+    if (is->paused) {
+        is->frame_timer += av_gettime_relative() / 1000000.0 + is->video_current_pts_drift - is->video_current_pts;
+        if (is->read_pause_return != AVERROR(ENOSYS)) {
+            is->video_current_pts = is->video_current_pts_drift + av_gettime_relative() / 1000000.0;
+        }
+        is->video_current_pts_drift = is->video_current_pts - av_gettime_relative() / 1000000.0;
+    }
+    is->paused = !is->paused;
+}
+
+static double compute_target_time(double frame_current_pts, PlayerState *is)
+{
+    double delay, sync_threshold, diff = 0;
+
+    /* compute nominal delay */
+    delay = frame_current_pts - is->frame_last_pts;
+    if (delay <= 0 || delay >= 10.0) {
+        /* if incorrect delay, use previous one */
+        delay = is->frame_last_delay;
+    } else {
+        is->frame_last_delay = delay;
+    }
+    is->frame_last_pts = frame_current_pts;
+
+    /* update delay to follow master synchronisation source */
+    if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) ||
+         is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
+        /* if video is slave, we try to correct big delays by
+           duplicating or deleting a frame */
+        diff = get_video_clock(is) - get_master_clock(is);
+
+        /* skip or repeat frame. We take into account the
+           delay to compute the threshold. I still don't know
+           if it is the best guess */
+        sync_threshold = FFMAX(AV_SYNC_THRESHOLD, delay);
+        if (fabs(diff) < AV_NOSYNC_THRESHOLD) {
+            if (diff <= -sync_threshold)
+                delay = 0;
+            else if (diff >= sync_threshold)
+                delay = 2 * delay;
+        }
+    }
+    is->frame_timer += delay;
+
+    av_log(NULL, AV_LOG_TRACE, "video: delay=%0.3f pts=%0.3f A-V=%f\n",
+            delay, frame_current_pts, -diff);
+
+    return is->frame_timer;
+}
+
+/* called to display each frame */
+static void video_refresh_timer(void *opaque)
+{
+    PlayerState *is = opaque;
+    VideoPicture *vp;
+
+    SubPicture *sp, *sp2;
+
+    if (is->video_st) {
+retry:
+        if (is->pictq_size == 0) {
+            // nothing to do, no picture to display in the que
+        } else {
+            double time = av_gettime_relative() / 1000000.0;
+            double next_target;
+            /* dequeue the picture */
+            vp = &is->pictq[is->pictq_rindex];
+
+            if (time < vp->target_clock)
+                return;
+            /* update current video pts */
+            is->video_current_pts = vp->pts;
+            is->video_current_pts_drift = is->video_current_pts - time;
+            is->video_current_pos = vp->pos;
+            if (is->pictq_size > 1) {
+                VideoPicture *nextvp = &is->pictq[(is->pictq_rindex + 1) % VIDEO_PICTURE_QUEUE_SIZE];
+                assert(nextvp->target_clock >= vp->target_clock);
+                next_target= nextvp->target_clock;
+            } else {
+                next_target = vp->target_clock + is->video_clock - vp->pts; // FIXME pass durations cleanly
+            }
+            if (framedrop && time > next_target) {
+                is->skip_frames *= 1.0 + FRAME_SKIP_FACTOR;
+                if (is->pictq_size > 1 || time > next_target + 0.5) {
+                    /* update queue size and signal for next picture */
+                    if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
+                        is->pictq_rindex = 0;
+
+                    SDL_LockMutex(is->pictq_mutex);
+                    is->pictq_size--;
+                    SDL_CondSignal(is->pictq_cond);
+                    SDL_UnlockMutex(is->pictq_mutex);
+                    goto retry;
+                }
+            }
+
+            if (is->subtitle_st) {
+                if (is->subtitle_stream_changed) {
+                    SDL_LockMutex(is->subpq_mutex);
+
+                    while (is->subpq_size) {
+                        free_subpicture(&is->subpq[is->subpq_rindex]);
+
+                        /* update queue size and signal for next picture */
+                        if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
+                            is->subpq_rindex = 0;
+
+                        is->subpq_size--;
+                    }
+                    is->subtitle_stream_changed = 0;
+
+                    SDL_CondSignal(is->subpq_cond);
+                    SDL_UnlockMutex(is->subpq_mutex);
+                } else {
+                    if (is->subpq_size > 0) {
+                        sp = &is->subpq[is->subpq_rindex];
+
+                        if (is->subpq_size > 1)
+                            sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
+                        else
+                            sp2 = NULL;
+
+                        if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
+                                || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
+                        {
+                            free_subpicture(sp);
+
+                            /* update queue size and signal for next picture */
+                            if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
+                                is->subpq_rindex = 0;
+
+                            SDL_LockMutex(is->subpq_mutex);
+                            is->subpq_size--;
+                            SDL_CondSignal(is->subpq_cond);
+                            SDL_UnlockMutex(is->subpq_mutex);
+                        }
+                    }
+                }
+            }
+
+            /* display picture */
+            if (!display_disable)
+                video_display(is);
+
+            /* update queue size and signal for next picture */
+            if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
+                is->pictq_rindex = 0;
+
+            SDL_LockMutex(is->pictq_mutex);
+            is->pictq_size--;
+            SDL_CondSignal(is->pictq_cond);
+            SDL_UnlockMutex(is->pictq_mutex);
+        }
+    } else if (is->audio_st) {
+        /* draw the next audio frame */
+
+        /* if only audio stream, then display the audio bars (better
+           than nothing, just to test the implementation */
+
+        /* display picture */
+        if (!display_disable)
+            video_display(is);
+    }
+    if (show_status) {
+        static int64_t last_time;
+        int64_t cur_time;
+        int aqsize, vqsize, sqsize;
+        double av_diff;
+
+        cur_time = av_gettime_relative();
+        if (!last_time || (cur_time - last_time) >= 30000) {
+            aqsize = 0;
+            vqsize = 0;
+            sqsize = 0;
+            if (is->audio_st)
+                aqsize = is->audioq.size;
+            if (is->video_st)
+                vqsize = is->videoq.size;
+            if (is->subtitle_st)
+                sqsize = is->subtitleq.size;
+            av_diff = 0;
+            if (is->audio_st && is->video_st)
+                av_diff = get_audio_clock(is) - get_video_clock(is);
+            printf("%7.2f A-V:%7.3f s:%3.1f aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
+                   get_master_clock(is), av_diff, FFMAX(is->skip_frames - 1, 0), aqsize / 1024,
+                   vqsize / 1024, sqsize, is->pts_ctx.num_faulty_dts, is->pts_ctx.num_faulty_pts);
+            fflush(stdout);
+            last_time = cur_time;
+        }
+    }
+}
+
+static void player_close(PlayerState *is)
+{
+    VideoPicture *vp;
+    int i;
+    /* XXX: use a special url_shutdown call to abort parse cleanly */
+    is->abort_request = 1;
+    SDL_WaitThread(is->parse_tid, NULL);
+    SDL_WaitThread(is->refresh_tid, NULL);
+
+    /* free all pictures */
+    for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
+        vp = &is->pictq[i];
+        if (vp->bmp) {
+            SDL_FreeYUVOverlay(vp->bmp);
+            vp->bmp = NULL;
+        }
+    }
+    SDL_DestroyMutex(is->pictq_mutex);
+    SDL_DestroyCond(is->pictq_cond);
+    SDL_DestroyMutex(is->subpq_mutex);
+    SDL_DestroyCond(is->subpq_cond);
+}
+
+static void do_exit(void)
+{
+    if (player) {
+        player_close(player);
+        player = NULL;
+    }
+    uninit_opts();
+    avformat_network_deinit();
+    if (show_status)
+        printf("\n");
+    SDL_Quit();
+    av_log(NULL, AV_LOG_QUIET, "");
+    exit(0);
+}
+
+/* allocate a picture (needs to do that in main thread to avoid
+   potential locking problems */
+static void alloc_picture(void *opaque)
+{
+    PlayerState *is = opaque;
+    VideoPicture *vp;
+
+    vp = &is->pictq[is->pictq_windex];
+
+    if (vp->bmp)
+        SDL_FreeYUVOverlay(vp->bmp);
+
+    vp->width   = is->out_video_filter->inputs[0]->w;
+    vp->height  = is->out_video_filter->inputs[0]->h;
+    vp->pix_fmt = is->out_video_filter->inputs[0]->format;
+
+    vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
+                                   SDL_YV12_OVERLAY,
+                                   screen);
+    if (!vp->bmp || vp->bmp->pitches[0] < vp->width) {
+        /* SDL allocates a buffer smaller than requested if the video
+         * overlay hardware is unable to support the requested size. */
+        fprintf(stderr, "Error: the video system does not support an image\n"
+                        "size of %dx%d pixels. Try using -vf \"scale=w:h\"\n"
+                        "to reduce the image size.\n", vp->width, vp->height );
+        do_exit();
+    }
+
+    SDL_LockMutex(is->pictq_mutex);
+    vp->allocated = 1;
+    SDL_CondSignal(is->pictq_cond);
+    SDL_UnlockMutex(is->pictq_mutex);
+}
+
+/* The 'pts' parameter is the dts of the packet / pts of the frame and
+ * guessed if not known. */
+static int queue_picture(PlayerState *is, AVFrame *src_frame, double pts, int64_t pos)
+{
+    VideoPicture *vp;
+
+    /* wait until we have space to put a new picture */
+    SDL_LockMutex(is->pictq_mutex);
+
+    if (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE && !is->refresh)
+        is->skip_frames = FFMAX(1.0 - FRAME_SKIP_FACTOR, is->skip_frames * (1.0 - FRAME_SKIP_FACTOR));
+
+    while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
+           !is->videoq.abort_request) {
+        SDL_CondWait(is->pictq_cond, is->pictq_mutex);
+    }
+    SDL_UnlockMutex(is->pictq_mutex);
+
+    if (is->videoq.abort_request)
+        return -1;
+
+    vp = &is->pictq[is->pictq_windex];
+
+    vp->sar = src_frame->sample_aspect_ratio;
+
+    /* alloc or resize hardware picture buffer */
+    if (!vp->bmp || vp->reallocate ||
+        vp->width  != is->out_video_filter->inputs[0]->w ||
+        vp->height != is->out_video_filter->inputs[0]->h) {
+        SDL_Event event;
+
+        vp->allocated  = 0;
+        vp->reallocate = 0;
+
+        /* the allocation must be done in the main thread to avoid
+           locking problems */
+        event.type = FF_ALLOC_EVENT;
+        event.user.data1 = is;
+        SDL_PushEvent(&event);
+
+        /* wait until the picture is allocated */
+        SDL_LockMutex(is->pictq_mutex);
+        while (!vp->allocated && !is->videoq.abort_request) {
+            SDL_CondWait(is->pictq_cond, is->pictq_mutex);
+        }
+        SDL_UnlockMutex(is->pictq_mutex);
+
+        if (is->videoq.abort_request)
+            return -1;
+    }
+
+    /* if the frame is not skipped, then display it */
+    if (vp->bmp) {
+        uint8_t *data[4];
+        int linesize[4];
+
+        /* get a pointer on the bitmap */
+        SDL_LockYUVOverlay (vp->bmp);
+
+        data[0] = vp->bmp->pixels[0];
+        data[1] = vp->bmp->pixels[2];
+        data[2] = vp->bmp->pixels[1];
+
+        linesize[0] = vp->bmp->pitches[0];
+        linesize[1] = vp->bmp->pitches[2];
+        linesize[2] = vp->bmp->pitches[1];
+
+        // FIXME use direct rendering
+        av_image_copy(data, linesize, src_frame->data, src_frame->linesize,
+                      vp->pix_fmt, vp->width, vp->height);
+
+        /* update the bitmap content */
+        SDL_UnlockYUVOverlay(vp->bmp);
+
+        vp->pts = pts;
+        vp->pos = pos;
+
+        /* now we can update the picture count */
+        if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
+            is->pictq_windex = 0;
+        SDL_LockMutex(is->pictq_mutex);
+        vp->target_clock = compute_target_time(vp->pts, is);
+
+        is->pictq_size++;
+        SDL_UnlockMutex(is->pictq_mutex);
+    }
+    return 0;
+}
+
+/* Compute the exact PTS for the picture if it is omitted in the stream.
+ * The 'pts1' parameter is the dts of the packet / pts of the frame. */
+static int output_picture2(PlayerState *is, AVFrame *src_frame, double pts1, int64_t pos)
+{
+    double frame_delay, pts;
+    int ret;
+
+    pts = pts1;
+
+    if (pts != 0) {
+        /* update video clock with pts, if present */
+        is->video_clock = pts;
+    } else {
+        pts = is->video_clock;
+    }
+    /* update video clock for next frame */
+    frame_delay = av_q2d(is->video_dec->time_base);
+    /* For MPEG-2, the frame can be repeated, so we update the
+       clock accordingly */
+    frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
+    is->video_clock += frame_delay;
+
+    ret = queue_picture(is, src_frame, pts, pos);
+    av_frame_unref(src_frame);
+    return ret;
+}
+
+static int get_video_frame(PlayerState *is, AVFrame *frame, int64_t *pts, AVPacket *pkt)
+{
+    int got_picture, i;
+
+    if (packet_queue_get(&is->videoq, pkt, 1) < 0)
+        return -1;
+
+    if (pkt->data == flush_pkt.data) {
+        avcodec_flush_buffers(is->video_dec);
+
+        SDL_LockMutex(is->pictq_mutex);
+        // Make sure there are no long delay timers (ideally we should just flush the que but thats harder)
+        for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
+            is->pictq[i].target_clock= 0;
+        }
+        while (is->pictq_size && !is->videoq.abort_request) {
+            SDL_CondWait(is->pictq_cond, is->pictq_mutex);
+        }
+        is->video_current_pos = -1;
+        SDL_UnlockMutex(is->pictq_mutex);
+
+        init_pts_correction(&is->pts_ctx);
+        is->frame_last_pts = AV_NOPTS_VALUE;
+        is->frame_last_delay = 0;
+        is->frame_timer = (double)av_gettime_relative() / 1000000.0;
+        is->skip_frames = 1;
+        is->skip_frames_index = 0;
+        return 0;
+    }
+
+    avcodec_decode_video2(is->video_dec, frame, &got_picture, pkt);
+
+    if (got_picture) {
+        if (decoder_reorder_pts == -1) {
+            *pts = guess_correct_pts(&is->pts_ctx, frame->pts, frame->pkt_dts);
+        } else if (decoder_reorder_pts) {
+            *pts = frame->pts;
+        } else {
+            *pts = frame->pkt_dts;
+        }
+
+        if (*pts == AV_NOPTS_VALUE) {
+            *pts = 0;
+        }
+        if (is->video_st->sample_aspect_ratio.num) {
+            frame->sample_aspect_ratio = is->video_st->sample_aspect_ratio;
+        }
+
+        is->skip_frames_index += 1;
+        if (is->skip_frames_index >= is->skip_frames) {
+            is->skip_frames_index -= FFMAX(is->skip_frames, 1.0);
+            return 1;
+        }
+        av_frame_unref(frame);
+    }
+    return 0;
+}
+
+static int configure_video_filters(AVFilterGraph *graph, PlayerState *is, const char *vfilters)
+{
+    char sws_flags_str[128];
+    char buffersrc_args[256];
+    int ret;
+    AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter;
+    AVCodecContext *codec = is->video_dec;
+
+    snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
+    graph->scale_sws_opts = av_strdup(sws_flags_str);
+
+    snprintf(buffersrc_args, sizeof(buffersrc_args), "%d:%d:%d:%d:%d:%d:%d",
+             codec->width, codec->height, codec->pix_fmt,
+             is->video_st->time_base.num, is->video_st->time_base.den,
+             codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
+
+
+    if ((ret = avfilter_graph_create_filter(&filt_src,
+                                            avfilter_get_by_name("buffer"),
+                                            "src", buffersrc_args, NULL,
+                                            graph)) < 0)
+        return ret;
+    if ((ret = avfilter_graph_create_filter(&filt_out,
+                                            avfilter_get_by_name("buffersink"),
+                                            "out", NULL, NULL, graph)) < 0)
+        return ret;
+
+    last_filter = filt_out;
+
+/* Note: this macro adds a filter before the lastly added filter, so the
+ * processing order of the filters is in reverse */
+#define INSERT_FILT(name, arg) do {                                          \
+    AVFilterContext *filt_ctx;                                               \
+                                                                             \
+    ret = avfilter_graph_create_filter(&filt_ctx,                            \
+                                       avfilter_get_by_name(name),           \
+                                       "avplay_" name, arg, NULL, graph);    \
+    if (ret < 0)                                                             \
+        return ret;                                                          \
+                                                                             \
+    ret = avfilter_link(filt_ctx, 0, last_filter, 0);                        \
+    if (ret < 0)                                                             \
+        return ret;                                                          \
+                                                                             \
+    last_filter = filt_ctx;                                                  \
+} while (0)
+
+    INSERT_FILT("format", "yuv420p");
+
+    if (autorotate) {
+        uint8_t* displaymatrix = av_stream_get_side_data(is->video_st,
+                                                         AV_PKT_DATA_DISPLAYMATRIX, NULL);
+        if (displaymatrix) {
+            double rot = av_display_rotation_get((int32_t*) displaymatrix);
+            if (rot < -135 || rot > 135) {
+                INSERT_FILT("vflip", NULL);
+                INSERT_FILT("hflip", NULL);
+            } else if (rot < -45) {
+                INSERT_FILT("transpose", "dir=clock");
+            } else if (rot > 45) {
+                INSERT_FILT("transpose", "dir=cclock");
+            }
+        }
+    }
+
+    if (vfilters) {
+        AVFilterInOut *outputs = avfilter_inout_alloc();
+        AVFilterInOut *inputs  = avfilter_inout_alloc();
+
+        outputs->name    = av_strdup("in");
+        outputs->filter_ctx = filt_src;
+        outputs->pad_idx = 0;
+        outputs->next    = NULL;
+
+        inputs->name    = av_strdup("out");
+        inputs->filter_ctx = last_filter;
+        inputs->pad_idx = 0;
+        inputs->next    = NULL;
+
+        if ((ret = avfilter_graph_parse(graph, vfilters, inputs, outputs, NULL)) < 0)
+            return ret;
+    } else {
+        if ((ret = avfilter_link(filt_src, 0, last_filter, 0)) < 0)
+            return ret;
+    }
+
+    if ((ret = avfilter_graph_config(graph, NULL)) < 0)
+        return ret;
+
+    is->in_video_filter  = filt_src;
+    is->out_video_filter = filt_out;
+
+    return ret;
+}
+
+static int video_thread(void *arg)
+{
+    AVPacket pkt = { 0 };
+    PlayerState *is = arg;
+    AVFrame *frame = av_frame_alloc();
+    int64_t pts_int;
+    double pts;
+    int ret;
+
+    AVFilterGraph *graph = avfilter_graph_alloc();
+    AVFilterContext *filt_out = NULL, *filt_in = NULL;
+    int last_w = is->video_dec->width;
+    int last_h = is->video_dec->height;
+    if (!graph) {
+        av_frame_free(&frame);
+        return AVERROR(ENOMEM);
+    }
+
+    if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
+        goto the_end;
+    filt_in  = is->in_video_filter;
+    filt_out = is->out_video_filter;
+
+    if (!frame) {
+        avfilter_graph_free(&graph);
+        return AVERROR(ENOMEM);
+    }
+
+    for (;;) {
+        AVRational tb;
+        while (is->paused && !is->videoq.abort_request)
+            SDL_Delay(10);
+
+        av_packet_unref(&pkt);
+
+        ret = get_video_frame(is, frame, &pts_int, &pkt);
+        if (ret < 0)
+            goto the_end;
+
+        if (!ret)
+            continue;
+
+        if (   last_w != is->video_dec->width
+            || last_h != is->video_dec->height) {
+            av_log(NULL, AV_LOG_TRACE, "Changing size %dx%d -> %dx%d\n", last_w, last_h,
+                    is->video_dec->width, is->video_dec->height);
+            avfilter_graph_free(&graph);
+            graph = avfilter_graph_alloc();
+            if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
+                goto the_end;
+            filt_in  = is->in_video_filter;
+            filt_out = is->out_video_filter;
+            last_w = is->video_dec->width;
+            last_h = is->video_dec->height;
+        }
+
+        frame->pts = pts_int;
+        ret = av_buffersrc_add_frame(filt_in, frame);
+        if (ret < 0)
+            goto the_end;
+
+        while (ret >= 0) {
+            ret = av_buffersink_get_frame(filt_out, frame);
+            if (ret < 0) {
+                ret = 0;
+                break;
+            }
+
+            pts_int = frame->pts;
+            tb      = filt_out->inputs[0]->time_base;
+            if (av_cmp_q(tb, is->video_st->time_base)) {
+                av_unused int64_t pts1 = pts_int;
+                pts_int = av_rescale_q(pts_int, tb, is->video_st->time_base);
+                av_log(NULL, AV_LOG_TRACE, "video_thread(): "
+                        "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
+                        tb.num, tb.den, pts1,
+                        is->video_st->time_base.num, is->video_st->time_base.den, pts_int);
+            }
+            pts = pts_int * av_q2d(is->video_st->time_base);
+            ret = output_picture2(is, frame, pts, 0);
+        }
+
+        if (ret < 0)
+            goto the_end;
+
+
+        if (step)
+            if (player)
+                stream_pause(player);
+    }
+ the_end:
+    av_freep(&vfilters);
+    avfilter_graph_free(&graph);
+    av_packet_unref(&pkt);
+    av_frame_free(&frame);
+    return 0;
+}
+
+static int subtitle_thread(void *arg)
+{
+    PlayerState *is = arg;
+    SubPicture *sp;
+    AVPacket pkt1, *pkt = &pkt1;
+    int got_subtitle;
+    double pts;
+    int i, j;
+    int r, g, b, y, u, v, a;
+
+    for (;;) {
+        while (is->paused && !is->subtitleq.abort_request) {
+            SDL_Delay(10);
+        }
+        if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
+            break;
+
+        if (pkt->data == flush_pkt.data) {
+            avcodec_flush_buffers(is->subtitle_dec);
+            continue;
+        }
+        SDL_LockMutex(is->subpq_mutex);
+        while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
+               !is->subtitleq.abort_request) {
+            SDL_CondWait(is->subpq_cond, is->subpq_mutex);
+        }
+        SDL_UnlockMutex(is->subpq_mutex);
+
+        if (is->subtitleq.abort_request)
+            return 0;
+
+        sp = &is->subpq[is->subpq_windex];
+
+       /* NOTE: ipts is the PTS of the _first_ picture beginning in
+           this packet, if any */
+        pts = 0;
+        if (pkt->pts != AV_NOPTS_VALUE)
+            pts = av_q2d(is->subtitle_dec->time_base) * pkt->pts;
+
+        avcodec_decode_subtitle2(is->subtitle_dec, &sp->sub,
+                                 &got_subtitle, pkt);
+
+        if (got_subtitle && sp->sub.format == 0) {
+            sp->pts = pts;
+
+            for (i = 0; i < sp->sub.num_rects; i++)
+            {
+                for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
+                {
+                    RGBA_IN(r, g, b, a, (uint32_t *)sp->sub.rects[i]->data[1] + j);
+                    y = RGB_TO_Y_CCIR(r, g, b);
+                    u = RGB_TO_U_CCIR(r, g, b, 0);
+                    v = RGB_TO_V_CCIR(r, g, b, 0);
+                    YUVA_OUT((uint32_t *)sp->sub.rects[i]->data[1] + j, y, u, v, a);
+                }
+            }
+
+            /* now we can update the picture count */
+            if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
+                is->subpq_windex = 0;
+            SDL_LockMutex(is->subpq_mutex);
+            is->subpq_size++;
+            SDL_UnlockMutex(is->subpq_mutex);
+        }
+        av_packet_unref(pkt);
+    }
+    return 0;
+}
+
+/* copy samples for viewing in editor window */
+static void update_sample_display(PlayerState *is, short *samples, int samples_size)
+{
+    int size, len;
+
+    size = samples_size / sizeof(short);
+    while (size > 0) {
+        len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
+        if (len > size)
+            len = size;
+        memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
+        samples += len;
+        is->sample_array_index += len;
+        if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
+            is->sample_array_index = 0;
+        size -= len;
+    }
+}
+
+/* return the new audio buffer size (samples can be added or deleted
+   to get better sync if video or external master clock) */
+static int synchronize_audio(PlayerState *is, short *samples,
+                             int samples_size1, double pts)
+{
+    int n, samples_size;
+    double ref_clock;
+
+    n = is->sdl_channels * av_get_bytes_per_sample(is->sdl_sample_fmt);
+    samples_size = samples_size1;
+
+    /* if not master, then we try to remove or add samples to correct the clock */
+    if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
+         is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
+        double diff, avg_diff;
+        int wanted_size, min_size, max_size, nb_samples;
+
+        ref_clock = get_master_clock(is);
+        diff = get_audio_clock(is) - ref_clock;
+
+        if (diff < AV_NOSYNC_THRESHOLD) {
+            is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
+            if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
+                /* not enough measures to have a correct estimate */
+                is->audio_diff_avg_count++;
+            } else {
+                /* estimate the A-V difference */
+                avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
+
+                if (fabs(avg_diff) >= is->audio_diff_threshold) {
+                    wanted_size = samples_size + ((int)(diff * is->sdl_sample_rate) * n);
+                    nb_samples = samples_size / n;
+
+                    min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
+                    max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
+                    if (wanted_size < min_size)
+                        wanted_size = min_size;
+                    else if (wanted_size > max_size)
+                        wanted_size = max_size;
+
+                    /* add or remove samples to correction the synchro */
+                    if (wanted_size < samples_size) {
+                        /* remove samples */
+                        samples_size = wanted_size;
+                    } else if (wanted_size > samples_size) {
+                        uint8_t *samples_end, *q;
+                        int nb;
+
+                        /* add samples */
+                        nb = (samples_size - wanted_size);
+                        samples_end = (uint8_t *)samples + samples_size - n;
+                        q = samples_end + n;
+                        while (nb > 0) {
+                            memcpy(q, samples_end, n);
+                            q += n;
+                            nb -= n;
+                        }
+                        samples_size = wanted_size;
+                    }
+                }
+                av_log(NULL, AV_LOG_TRACE, "diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
+                        diff, avg_diff, samples_size - samples_size1,
+                        is->audio_clock, is->video_clock, is->audio_diff_threshold);
+            }
+        } else {
+            /* too big difference : may be initial PTS errors, so
+               reset A-V filter */
+            is->audio_diff_avg_count = 0;
+            is->audio_diff_cum       = 0;
+        }
+    }
+
+    return samples_size;
+}
+
+/* decode one audio frame and returns its uncompressed size */
+static int audio_decode_frame(PlayerState *is, double *pts_ptr)
+{
+    AVPacket *pkt_temp = &is->audio_pkt_temp;
+    AVPacket *pkt = &is->audio_pkt;
+    AVCodecContext *dec = is->audio_dec;
+    int n, len1, data_size, got_frame;
+    double pts;
+    int new_packet = 0;
+    int flush_complete = 0;
+
+    for (;;) {
+        /* NOTE: the audio packet can contain several frames */
+        while (pkt_temp->size > 0 || (!pkt_temp->data && new_packet)) {
+            int resample_changed, audio_resample;
+
+            if (!is->frame) {
+                if (!(is->frame = av_frame_alloc()))
+                    return AVERROR(ENOMEM);
+            }
+
+            if (flush_complete)
+                break;
+            new_packet = 0;
+            len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
+            if (len1 < 0) {
+                /* if error, we skip the frame */
+                pkt_temp->size = 0;
+                break;
+            }
+
+            pkt_temp->data += len1;
+            pkt_temp->size -= len1;
+
+            if (!got_frame) {
+                /* stop sending empty packets if the decoder is finished */
+                if (!pkt_temp->data && (dec->codec->capabilities & AV_CODEC_CAP_DELAY))
+                    flush_complete = 1;
+                continue;
+            }
+            data_size = av_samples_get_buffer_size(NULL, dec->channels,
+                                                   is->frame->nb_samples,
+                                                   is->frame->format, 1);
+
+            audio_resample = is->frame->format         != is->sdl_sample_fmt     ||
+                             is->frame->channel_layout != is->sdl_channel_layout ||
+                             is->frame->sample_rate    != is->sdl_sample_rate;
+
+            resample_changed = is->frame->format         != is->resample_sample_fmt     ||
+                               is->frame->channel_layout != is->resample_channel_layout ||
+                               is->frame->sample_rate    != is->resample_sample_rate;
+
+            if ((!is->avr && audio_resample) || resample_changed) {
+                int ret;
+                if (is->avr)
+                    avresample_close(is->avr);
+                else if (audio_resample) {
+                    is->avr = avresample_alloc_context();
+                    if (!is->avr) {
+                        fprintf(stderr, "error allocating AVAudioResampleContext\n");
+                        break;
+                    }
+                }
+                if (audio_resample) {
+                    av_opt_set_int(is->avr, "in_channel_layout",  is->frame->channel_layout, 0);
+                    av_opt_set_int(is->avr, "in_sample_fmt",      is->frame->format,         0);
+                    av_opt_set_int(is->avr, "in_sample_rate",     is->frame->sample_rate,    0);
+                    av_opt_set_int(is->avr, "out_channel_layout", is->sdl_channel_layout,    0);
+                    av_opt_set_int(is->avr, "out_sample_fmt",     is->sdl_sample_fmt,        0);
+                    av_opt_set_int(is->avr, "out_sample_rate",    is->sdl_sample_rate,       0);
+
+                    if ((ret = avresample_open(is->avr)) < 0) {
+                        fprintf(stderr, "error initializing libavresample\n");
+                        break;
+                    }
+                }
+                is->resample_sample_fmt     = is->frame->format;
+                is->resample_channel_layout = is->frame->channel_layout;
+                is->resample_sample_rate    = is->frame->sample_rate;
+            }
+
+            if (audio_resample) {
+                void *tmp_out;
+                int out_samples, out_size, out_linesize;
+                int osize      = av_get_bytes_per_sample(is->sdl_sample_fmt);
+                int nb_samples = is->frame->nb_samples;
+
+                out_size = av_samples_get_buffer_size(&out_linesize,
+                                                      is->sdl_channels,
+                                                      nb_samples,
+                                                      is->sdl_sample_fmt, 0);
+                tmp_out = av_realloc(is->audio_buf1, out_size);
+                if (!tmp_out)
+                    return AVERROR(ENOMEM);
+                is->audio_buf1 = tmp_out;
+
+                out_samples = avresample_convert(is->avr,
+                                                 &is->audio_buf1,
+                                                 out_linesize, nb_samples,
+                                                 is->frame->data,
+                                                 is->frame->linesize[0],
+                                                 is->frame->nb_samples);
+                if (out_samples < 0) {
+                    fprintf(stderr, "avresample_convert() failed\n");
+                    break;
+                }
+                is->audio_buf = is->audio_buf1;
+                data_size = out_samples * osize * is->sdl_channels;
+            } else {
+                is->audio_buf = is->frame->data[0];
+            }
+
+            /* if no pts, then compute it */
+            pts = is->audio_clock;
+            *pts_ptr = pts;
+            n = is->sdl_channels * av_get_bytes_per_sample(is->sdl_sample_fmt);
+            is->audio_clock += (double)data_size /
+                (double)(n * is->sdl_sample_rate);
+#ifdef DEBUG
+            {
+                static double last_clock;
+                printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
+                       is->audio_clock - last_clock,
+                       is->audio_clock, pts);
+                last_clock = is->audio_clock;
+            }
+#endif
+            return data_size;
+        }
+
+        /* free the current packet */
+        if (pkt->data)
+            av_packet_unref(pkt);
+        memset(pkt_temp, 0, sizeof(*pkt_temp));
+
+        if (is->paused || is->audioq.abort_request) {
+            return -1;
+        }
+
+        /* read next packet */
+        if ((new_packet = packet_queue_get(&is->audioq, pkt, 1)) < 0)
+            return -1;
+
+        if (pkt->data == flush_pkt.data) {
+            avcodec_flush_buffers(dec);
+            flush_complete = 0;
+        }
+
+        *pkt_temp = *pkt;
+
+        /* if update the audio clock with the pts */
+        if (pkt->pts != AV_NOPTS_VALUE) {
+            is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
+        }
+    }
+}
+
+/* prepare a new audio buffer */
+static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
+{
+    PlayerState *is = opaque;
+    int audio_size, len1;
+    double pts;
+
+    audio_callback_time = av_gettime_relative();
+
+    while (len > 0) {
+        if (is->audio_buf_index >= is->audio_buf_size) {
+           audio_size = audio_decode_frame(is, &pts);
+           if (audio_size < 0) {
+                /* if error, just output silence */
+               is->audio_buf      = is->silence_buf;
+               is->audio_buf_size = sizeof(is->silence_buf);
+           } else {
+               if (is->show_audio)
+                   update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
+               audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
+                                              pts);
+               is->audio_buf_size = audio_size;
+           }
+           is->audio_buf_index = 0;
+        }
+        len1 = is->audio_buf_size - is->audio_buf_index;
+        if (len1 > len)
+            len1 = len;
+        memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
+        len -= len1;
+        stream += len1;
+        is->audio_buf_index += len1;
+    }
+}
+
+static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type)
+{
+    const AVCodecDescriptor *desc;
+    AVCodec *codec = avcodec_find_decoder_by_name(name);
+
+    if (!codec && (desc = avcodec_descriptor_get_by_name(name))) {
+        codec = avcodec_find_decoder(desc->id);
+        if (codec)
+            av_log(NULL, AV_LOG_VERBOSE, "Matched decoder '%s' for codec '%s'.\n",
+                   codec->name, desc->name);
+    }
+
+    if (!codec) {
+        av_log(NULL, AV_LOG_FATAL, "Unknown decoder '%s'\n", name);
+        exit_program(1);
+    }
+
+    if (codec->type != type) {
+        av_log(NULL, AV_LOG_FATAL, "Invalid decoder type '%s'\n", name);
+        exit_program(1);
+    }
+
+    return codec;
+}
+
+static AVCodec *choose_decoder(PlayerState *is, AVFormatContext *ic, AVStream *st)
+{
+    char *codec_name = NULL;
+    int i, ret;
+
+    for (i = 0; i < is->nb_codec_names; i++) {
+        char *spec = is->codec_names[i].specifier;
+        if ((ret = check_stream_specifier(ic, st, spec)) > 0)
+            codec_name = is->codec_names[i].u.str;
+        else if (ret < 0)
+            exit_program(1);
+    }
+
+    if (codec_name) {
+        AVCodec *codec = find_codec_or_die(codec_name, st->codecpar->codec_type);
+        st->codecpar->codec_id = codec->id;
+        return codec;
+    } else
+        return avcodec_find_decoder(st->codecpar->codec_id);
+}
+
+/* open a given stream. Return 0 if OK */
+static int stream_component_open(PlayerState *is, int stream_index)
+{
+    AVFormatContext *ic = is->ic;
+    AVCodecContext *avctx;
+    AVCodec *codec;
+    SDL_AudioSpec wanted_spec, spec;
+    AVDictionary *opts;
+    AVDictionaryEntry *t = NULL;
+    int ret = 0;
+
+    if (stream_index < 0 || stream_index >= ic->nb_streams)
+        return -1;
+
+    avctx = avcodec_alloc_context3(NULL);
+    if (!avctx)
+        return AVERROR(ENOMEM);
+
+    ret = avcodec_parameters_to_context(avctx, ic->streams[stream_index]->codecpar);
+    if (ret < 0) {
+        avcodec_free_context(&avctx);
+        return ret;
+    }
+
+    opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], NULL);
+
+    codec = choose_decoder(is, ic, ic->streams[stream_index]);
+    avctx->workaround_bugs   = workaround_bugs;
+    avctx->idct_algo         = idct;
+    avctx->skip_frame        = skip_frame;
+    avctx->skip_idct         = skip_idct;
+    avctx->skip_loop_filter  = skip_loop_filter;
+    avctx->error_concealment = error_concealment;
+
+    if (fast)
+        avctx->flags2 |= AV_CODEC_FLAG2_FAST;
+
+    if (!av_dict_get(opts, "threads", NULL, 0))
+        av_dict_set(&opts, "threads", "auto", 0);
+    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO)
+        av_dict_set(&opts, "refcounted_frames", "1", 0);
+    if (!codec ||
+        (ret = avcodec_open2(avctx, codec, &opts)) < 0) {
+        goto fail;
+    }
+    if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
+        av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
+        ret =  AVERROR_OPTION_NOT_FOUND;
+        goto fail;
+    }
+
+    /* prepare audio output */
+    if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
+        is->sdl_sample_rate = avctx->sample_rate;
+
+        if (!avctx->channel_layout)
+            avctx->channel_layout = av_get_default_channel_layout(avctx->channels);
+        if (!avctx->channel_layout) {
+            fprintf(stderr, "unable to guess channel layout\n");
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+        if (avctx->channels == 1)
+            is->sdl_channel_layout = AV_CH_LAYOUT_MONO;
+        else
+            is->sdl_channel_layout = AV_CH_LAYOUT_STEREO;
+        is->sdl_channels = av_get_channel_layout_nb_channels(is->sdl_channel_layout);
+
+        wanted_spec.format = AUDIO_S16SYS;
+        wanted_spec.freq = is->sdl_sample_rate;
+        wanted_spec.channels = is->sdl_channels;
+        wanted_spec.silence = 0;
+        wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
+        wanted_spec.callback = sdl_audio_callback;
+        wanted_spec.userdata = is;
+        if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
+            fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
+            ret = AVERROR_UNKNOWN;
+            goto fail;
+        }
+        is->audio_hw_buf_size = spec.size;
+        is->sdl_sample_fmt          = AV_SAMPLE_FMT_S16;
+        is->resample_sample_fmt     = is->sdl_sample_fmt;
+        is->resample_channel_layout = avctx->channel_layout;
+        is->resample_sample_rate    = avctx->sample_rate;
+    }
+
+    ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
+    switch (avctx->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        is->audio_stream = stream_index;
+        is->audio_st = ic->streams[stream_index];
+        is->audio_dec = avctx;
+        is->audio_buf_size  = 0;
+        is->audio_buf_index = 0;
+
+        /* init averaging filter */
+        is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
+        is->audio_diff_avg_count = 0;
+        /* since we do not have a precise enough audio FIFO fullness,
+           we correct audio sync only if larger than this threshold */
+        is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;
+
+        memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
+        packet_queue_init(&is->audioq);
+        SDL_PauseAudio(0);
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        is->video_stream = stream_index;
+        is->video_st = ic->streams[stream_index];
+        is->video_dec = avctx;
+
+        packet_queue_init(&is->videoq);
+        is->video_tid = SDL_CreateThread(video_thread, is);
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        is->subtitle_stream = stream_index;
+        is->subtitle_st = ic->streams[stream_index];
+        is->subtitle_dec = avctx;
+        packet_queue_init(&is->subtitleq);
+
+        is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
+        break;
+    default:
+        break;
+    }
+
+fail:
+    av_dict_free(&opts);
+
+    return ret;
+}
+
+static void stream_component_close(PlayerState *is, int stream_index)
+{
+    AVFormatContext *ic = is->ic;
+    AVCodecParameters *par;
+
+    if (stream_index < 0 || stream_index >= ic->nb_streams)
+        return;
+    par = ic->streams[stream_index]->codecpar;
+
+    switch (par->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        packet_queue_abort(&is->audioq);
+
+        SDL_CloseAudio();
+
+        packet_queue_end(&is->audioq);
+        av_packet_unref(&is->audio_pkt);
+        if (is->avr)
+            avresample_free(&is->avr);
+        av_freep(&is->audio_buf1);
+        is->audio_buf = NULL;
+        av_frame_free(&is->frame);
+
+        if (is->rdft) {
+            av_rdft_end(is->rdft);
+            av_freep(&is->rdft_data);
+            is->rdft = NULL;
+            is->rdft_bits = 0;
+        }
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        packet_queue_abort(&is->videoq);
+
+        /* note: we also signal this mutex to make sure we deblock the
+           video thread in all cases */
+        SDL_LockMutex(is->pictq_mutex);
+        SDL_CondSignal(is->pictq_cond);
+        SDL_UnlockMutex(is->pictq_mutex);
+
+        SDL_WaitThread(is->video_tid, NULL);
+
+        packet_queue_end(&is->videoq);
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        packet_queue_abort(&is->subtitleq);
+
+        /* note: we also signal this mutex to make sure we deblock the
+           video thread in all cases */
+        SDL_LockMutex(is->subpq_mutex);
+        is->subtitle_stream_changed = 1;
+
+        SDL_CondSignal(is->subpq_cond);
+        SDL_UnlockMutex(is->subpq_mutex);
+
+        SDL_WaitThread(is->subtitle_tid, NULL);
+
+        packet_queue_end(&is->subtitleq);
+        break;
+    default:
+        break;
+    }
+
+    ic->streams[stream_index]->discard = AVDISCARD_ALL;
+    switch (par->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        avcodec_free_context(&is->audio_dec);
+        is->audio_st = NULL;
+        is->audio_stream = -1;
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        avcodec_free_context(&is->video_dec);
+        is->video_st = NULL;
+        is->video_stream = -1;
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        avcodec_free_context(&is->subtitle_dec);
+        is->subtitle_st = NULL;
+        is->subtitle_stream = -1;
+        break;
+    default:
+        break;
+    }
+}
+
+/* since we have only one decoding thread, we can use a global
+   variable instead of a thread local variable */
+static PlayerState *global_video_state;
+
+static int decode_interrupt_cb(void *ctx)
+{
+    return global_video_state && global_video_state->abort_request;
+}
+
+static void stream_close(PlayerState *is)
+{
+    /* disable interrupting */
+    global_video_state = NULL;
+
+    /* close each stream */
+    if (is->audio_stream >= 0)
+        stream_component_close(is, is->audio_stream);
+    if (is->video_stream >= 0)
+        stream_component_close(is, is->video_stream);
+    if (is->subtitle_stream >= 0)
+        stream_component_close(is, is->subtitle_stream);
+    if (is->ic) {
+        avformat_close_input(&is->ic);
+    }
+}
+
+static int stream_setup(PlayerState *is)
+{
+    AVFormatContext *ic = NULL;
+    int err, i, ret;
+    int st_index[AVMEDIA_TYPE_NB];
+    AVDictionaryEntry *t;
+    AVDictionary **opts;
+    int orig_nb_streams;
+
+    memset(st_index, -1, sizeof(st_index));
+    is->video_stream = -1;
+    is->audio_stream = -1;
+    is->subtitle_stream = -1;
+
+    global_video_state = is;
+
+    ic = avformat_alloc_context();
+    if (!ic) {
+        av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+    ic->interrupt_callback.callback = decode_interrupt_cb;
+    err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
+    if (err < 0) {
+        print_error(is->filename, err);
+        ret = -1;
+        goto fail;
+    }
+
+    if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
+        av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
+        ret = AVERROR_OPTION_NOT_FOUND;
+        goto fail;
+    }
+    is->ic = ic;
+
+    if (genpts)
+        ic->flags |= AVFMT_FLAG_GENPTS;
+
+    opts = setup_find_stream_info_opts(ic, codec_opts);
+    orig_nb_streams = ic->nb_streams;
+
+    for (i = 0; i < ic->nb_streams; i++)
+        choose_decoder(is, ic, ic->streams[i]);
+
+    err = avformat_find_stream_info(ic, opts);
+
+    for (i = 0; i < orig_nb_streams; i++)
+        av_dict_free(&opts[i]);
+    av_freep(&opts);
+
+    if (err < 0) {
+        fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
+        ret = -1;
+        goto fail;
+    }
+
+    if (ic->pb)
+        ic->pb->eof_reached = 0; // FIXME hack, avplay maybe should not use url_feof() to test for the end
+
+    if (seek_by_bytes < 0)
+        seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT);
+
+    /* if seeking requested, we execute it */
+    if (start_time != AV_NOPTS_VALUE) {
+        int64_t timestamp;
+
+        timestamp = start_time;
+        /* add the stream start time */
+        if (ic->start_time != AV_NOPTS_VALUE)
+            timestamp += ic->start_time;
+        ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
+        if (ret < 0) {
+            fprintf(stderr, "%s: could not seek to position %0.3f\n",
+                    is->filename, (double)timestamp / AV_TIME_BASE);
+        }
+    }
+
+    for (i = 0; i < ic->nb_streams; i++)
+        ic->streams[i]->discard = AVDISCARD_ALL;
+    if (!video_disable)
+        st_index[AVMEDIA_TYPE_VIDEO] =
+            av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
+                                wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
+    if (!audio_disable)
+        st_index[AVMEDIA_TYPE_AUDIO] =
+            av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
+                                wanted_stream[AVMEDIA_TYPE_AUDIO],
+                                st_index[AVMEDIA_TYPE_VIDEO],
+                                NULL, 0);
+    if (!video_disable)
+        st_index[AVMEDIA_TYPE_SUBTITLE] =
+            av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
+                                wanted_stream[AVMEDIA_TYPE_SUBTITLE],
+                                (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
+                                 st_index[AVMEDIA_TYPE_AUDIO] :
+                                 st_index[AVMEDIA_TYPE_VIDEO]),
+                                NULL, 0);
+    if (show_status) {
+        av_dump_format(ic, 0, is->filename, 0);
+    }
+
+    /* open the streams */
+    if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
+        stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
+    }
+
+    ret = -1;
+    if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
+        ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
+    }
+    if (ret < 0) {
+        if (!display_disable)
+            is->show_audio = 2;
+    }
+
+    if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
+        stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
+    }
+
+    if (is->video_stream < 0 && is->audio_stream < 0) {
+        fprintf(stderr, "%s: could not open codecs\n", is->filename);
+        ret = -1;
+        goto fail;
+    }
+
+    return 0;
+
+fail:
+    return ret;
+}
+
+/* this thread gets the stream from the disk or the network */
+static int decode_thread(void *arg)
+{
+    PlayerState *is        = arg;
+    AVPacket pkt1, *pkt   = &pkt1;
+    AVFormatContext *ic   = is->ic;
+    int pkt_in_play_range = 0;
+    int ret, eof          = 0;
+
+    for (;;) {
+        if (is->abort_request)
+            break;
+        if (is->paused != is->last_paused) {
+            is->last_paused = is->paused;
+            if (is->paused)
+                is->read_pause_return = av_read_pause(ic);
+            else
+                av_read_play(ic);
+        }
+#if CONFIG_RTSP_DEMUXER
+        if (is->paused && !strcmp(ic->iformat->name, "rtsp")) {
+            /* wait 10 ms to avoid trying to get another packet */
+            /* XXX: horrible */
+            SDL_Delay(10);
+            continue;
+        }
+#endif
+        if (is->seek_req) {
+            int64_t seek_target = is->seek_pos;
+            int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
+            int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
+// FIXME the +-2 is due to rounding being not done in the correct direction in generation
+//      of the seek_pos/seek_rel variables
+
+            ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
+            if (ret < 0) {
+                fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
+            } else {
+                if (is->audio_stream >= 0) {
+                    packet_queue_flush(&is->audioq);
+                    packet_queue_put(&is->audioq, &flush_pkt);
+                }
+                if (is->subtitle_stream >= 0) {
+                    packet_queue_flush(&is->subtitleq);
+                    packet_queue_put(&is->subtitleq, &flush_pkt);
+                }
+                if (is->video_stream >= 0) {
+                    packet_queue_flush(&is->videoq);
+                    packet_queue_put(&is->videoq, &flush_pkt);
+                }
+            }
+            is->seek_req = 0;
+            eof = 0;
+        }
+
+        /* if the queue are full, no need to read more */
+        if (!infinite_buffer &&
+              (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
+            || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream < 0)
+                && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0)
+                && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0)))) {
+            /* wait 10 ms */
+            SDL_Delay(10);
+            continue;
+        }
+        if (eof) {
+            if (is->video_stream >= 0) {
+                av_init_packet(pkt);
+                pkt->data = NULL;
+                pkt->size = 0;
+                pkt->stream_index = is->video_stream;
+                packet_queue_put(&is->videoq, pkt);
+            }
+            if (is->audio_stream >= 0 &&
+                (is->audio_dec->codec->capabilities & AV_CODEC_CAP_DELAY)) {
+                av_init_packet(pkt);
+                pkt->data = NULL;
+                pkt->size = 0;
+                pkt->stream_index = is->audio_stream;
+                packet_queue_put(&is->audioq, pkt);
+            }
+            SDL_Delay(10);
+            if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
+                if (loop != 1 && (!loop || --loop)) {
+                    stream_seek(player, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
+                } else if (!noautoexit) {
+                    ret = AVERROR_EOF;
+                    goto fail;
+                }
+            }
+            continue;
+        }
+        ret = av_read_frame(ic, pkt);
+        if (ret < 0) {
+            if (ret == AVERROR_EOF || (ic->pb && ic->pb->eof_reached))
+                eof = 1;
+            if (ic->pb && ic->pb->error)
+                break;
+            SDL_Delay(100); /* wait for user event */
+            continue;
+        }
+        /* check if packet is in play range specified by user, then queue, otherwise discard */
+        pkt_in_play_range = duration == AV_NOPTS_VALUE ||
+                (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
+                av_q2d(ic->streams[pkt->stream_index]->time_base) -
+                (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
+                <= ((double)duration / 1000000);
+        if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
+            packet_queue_put(&is->audioq, pkt);
+        } else if (pkt->stream_index == is->video_stream && pkt_in_play_range) {
+            packet_queue_put(&is->videoq, pkt);
+        } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
+            packet_queue_put(&is->subtitleq, pkt);
+        } else {
+            av_packet_unref(pkt);
+        }
+    }
+    /* wait until the end */
+    while (!is->abort_request) {
+        SDL_Delay(100);
+    }
+
+    ret = 0;
+
+fail:
+    stream_close(is);
+
+    if (ret != 0) {
+        SDL_Event event;
+
+        event.type = FF_QUIT_EVENT;
+        event.user.data1 = is;
+        SDL_PushEvent(&event);
+    }
+    return 0;
+}
+
+static int stream_open(PlayerState *is,
+                       const char *filename, AVInputFormat *iformat)
+{
+    int ret;
+
+    av_strlcpy(is->filename, filename, sizeof(is->filename));
+    is->iformat = iformat;
+    is->ytop    = 0;
+    is->xleft   = 0;
+
+    if ((ret = stream_setup(is)) < 0) {
+        return ret;
+    }
+
+    /* start video display */
+    is->pictq_mutex = SDL_CreateMutex();
+    is->pictq_cond  = SDL_CreateCond();
+
+    is->subpq_mutex = SDL_CreateMutex();
+    is->subpq_cond  = SDL_CreateCond();
+
+    is->av_sync_type = av_sync_type;
+    is->refresh_tid  = SDL_CreateThread(refresh_thread, is);
+    if (!is->refresh_tid)
+        return -1;
+    is->parse_tid    = SDL_CreateThread(decode_thread, is);
+    if (!is->parse_tid)
+        return -1;
+    return 0;
+}
+
+static void stream_cycle_channel(PlayerState *is, int codec_type)
+{
+    AVFormatContext *ic = is->ic;
+    int start_index, stream_index;
+    AVStream *st;
+
+    if (codec_type == AVMEDIA_TYPE_VIDEO)
+        start_index = is->video_stream;
+    else if (codec_type == AVMEDIA_TYPE_AUDIO)
+        start_index = is->audio_stream;
+    else
+        start_index = is->subtitle_stream;
+    if (start_index < (codec_type == AVMEDIA_TYPE_SUBTITLE ? -1 : 0))
+        return;
+    stream_index = start_index;
+    for (;;) {
+        if (++stream_index >= is->ic->nb_streams)
+        {
+            if (codec_type == AVMEDIA_TYPE_SUBTITLE)
+            {
+                stream_index = -1;
+                goto the_end;
+            } else
+                stream_index = 0;
+        }
+        if (stream_index == start_index)
+            return;
+        st = ic->streams[stream_index];
+        if (st->codecpar->codec_type == codec_type) {
+            /* check that parameters are OK */
+            switch (codec_type) {
+            case AVMEDIA_TYPE_AUDIO:
+                if (st->codecpar->sample_rate != 0 &&
+                    st->codecpar->channels != 0)
+                    goto the_end;
+                break;
+            case AVMEDIA_TYPE_VIDEO:
+            case AVMEDIA_TYPE_SUBTITLE:
+                goto the_end;
+            default:
+                break;
+            }
+        }
+    }
+ the_end:
+    stream_component_close(is, start_index);
+    stream_component_open(is, stream_index);
+}
+
+
+static void toggle_full_screen(void)
+{
+#if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
+    /* OS X needs to empty the picture_queue */
+    int i;
+    for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
+        player->pictq[i].reallocate = 1;
+#endif
+    is_full_screen = !is_full_screen;
+    video_open(player);
+}
+
+static void toggle_pause(void)
+{
+    if (player)
+        stream_pause(player);
+    step = 0;
+}
+
+static void step_to_next_frame(void)
+{
+    if (player) {
+        /* if the stream is paused unpause it, then step */
+        if (player->paused)
+            stream_pause(player);
+    }
+    step = 1;
+}
+
+static void toggle_audio_display(void)
+{
+    if (player) {
+        int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
+        player->show_audio = (player->show_audio + 1) % 3;
+        fill_rectangle(screen,
+                       player->xleft, player->ytop, player->width, player->height,
+                       bgcolor);
+        SDL_UpdateRect(screen, player->xleft, player->ytop, player->width, player->height);
+    }
+}
+
+static void seek_chapter(PlayerState *is, int incr)
+{
+    int64_t pos = get_master_clock(is) * AV_TIME_BASE;
+    int i;
+
+    if (!is->ic->nb_chapters)
+        return;
+
+    /* find the current chapter */
+    for (i = 0; i < is->ic->nb_chapters; i++) {
+        AVChapter *ch = is->ic->chapters[i];
+        if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
+            i--;
+            break;
+        }
+    }
+
+    i += incr;
+    i = FFMAX(i, 0);
+    if (i >= is->ic->nb_chapters)
+        return;
+
+    av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
+    stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
+                                 AV_TIME_BASE_Q), 0, 0);
+}
+
+/* handle an event sent by the GUI */
+static void event_loop(void)
+{
+    SDL_Event event;
+    double incr, pos, frac;
+
+    for (;;) {
+        double x;
+        SDL_WaitEvent(&event);
+        switch (event.type) {
+        case SDL_KEYDOWN:
+            if (exit_on_keydown) {
+                do_exit();
+                break;
+            }
+            switch (event.key.keysym.sym) {
+            case SDLK_ESCAPE:
+            case SDLK_q:
+                do_exit();
+                break;
+            case SDLK_f:
+                toggle_full_screen();
+                break;
+            case SDLK_p:
+            case SDLK_SPACE:
+                toggle_pause();
+                break;
+            case SDLK_s: // S: Step to next frame
+                step_to_next_frame();
+                break;
+            case SDLK_a:
+                if (player)
+                    stream_cycle_channel(player, AVMEDIA_TYPE_AUDIO);
+                break;
+            case SDLK_v:
+                if (player)
+                    stream_cycle_channel(player, AVMEDIA_TYPE_VIDEO);
+                break;
+            case SDLK_t:
+                if (player)
+                    stream_cycle_channel(player, AVMEDIA_TYPE_SUBTITLE);
+                break;
+            case SDLK_w:
+                toggle_audio_display();
+                break;
+            case SDLK_PAGEUP:
+                seek_chapter(player, 1);
+                break;
+            case SDLK_PAGEDOWN:
+                seek_chapter(player, -1);
+                break;
+            case SDLK_LEFT:
+                incr = -10.0;
+                goto do_seek;
+            case SDLK_RIGHT:
+                incr = 10.0;
+                goto do_seek;
+            case SDLK_UP:
+                incr = 60.0;
+                goto do_seek;
+            case SDLK_DOWN:
+                incr = -60.0;
+            do_seek:
+                if (player) {
+                    if (seek_by_bytes) {
+                        if (player->video_stream >= 0 && player->video_current_pos >= 0) {
+                            pos = player->video_current_pos;
+                        } else if (player->audio_stream >= 0 && player->audio_pkt.pos >= 0) {
+                            pos = player->audio_pkt.pos;
+                        } else
+                            pos = avio_tell(player->ic->pb);
+                        if (player->ic->bit_rate)
+                            incr *= player->ic->bit_rate / 8.0;
+                        else
+                            incr *= 180000.0;
+                        pos += incr;
+                        stream_seek(player, pos, incr, 1);
+                    } else {
+                        pos = get_master_clock(player);
+                        pos += incr;
+                        stream_seek(player, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
+                    }
+                }
+                break;
+            default:
+                break;
+            }
+            break;
+        case SDL_MOUSEBUTTONDOWN:
+            if (exit_on_mousedown) {
+                do_exit();
+                break;
+            }
+        case SDL_MOUSEMOTION:
+            if (event.type == SDL_MOUSEBUTTONDOWN) {
+                x = event.button.x;
+            } else {
+                if (event.motion.state != SDL_PRESSED)
+                    break;
+                x = event.motion.x;
+            }
+            if (player) {
+                if (seek_by_bytes || player->ic->duration <= 0) {
+                    uint64_t size =  avio_size(player->ic->pb);
+                    stream_seek(player, size*x/player->width, 0, 1);
+                } else {
+                    int64_t ts;
+                    int ns, hh, mm, ss;
+                    int tns, thh, tmm, tss;
+                    tns  = player->ic->duration / 1000000LL;
+                    thh  = tns / 3600;
+                    tmm  = (tns % 3600) / 60;
+                    tss  = (tns % 60);
+                    frac = x / player->width;
+                    ns   = frac * tns;
+                    hh   = ns / 3600;
+                    mm   = (ns % 3600) / 60;
+                    ss   = (ns % 60);
+                    fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
+                            hh, mm, ss, thh, tmm, tss);
+                    ts = frac * player->ic->duration;
+                    if (player->ic->start_time != AV_NOPTS_VALUE)
+                        ts += player->ic->start_time;
+                    stream_seek(player, ts, 0, 0);
+                }
+            }
+            break;
+        case SDL_VIDEORESIZE:
+            if (player) {
+                screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
+                                          SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
+                screen_width  = player->width  = event.resize.w;
+                screen_height = player->height = event.resize.h;
+            }
+            break;
+        case SDL_QUIT:
+        case FF_QUIT_EVENT:
+            do_exit();
+            break;
+        case FF_ALLOC_EVENT:
+            video_open(event.user.data1);
+            alloc_picture(event.user.data1);
+            break;
+        case FF_REFRESH_EVENT:
+            video_refresh_timer(event.user.data1);
+            player->refresh = 0;
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+static int opt_frame_size(void *optctx, const char *opt, const char *arg)
+{
+    av_log(NULL, AV_LOG_ERROR,
+           "Option '%s' has been removed, use private format options instead\n", opt);
+    return AVERROR(EINVAL);
+}
+
+static int opt_width(void *optctx, const char *opt, const char *arg)
+{
+    screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
+    return 0;
+}
+
+static int opt_height(void *optctx, const char *opt, const char *arg)
+{
+    screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
+    return 0;
+}
+
+static int opt_format(void *optctx, const char *opt, const char *arg)
+{
+    file_iformat = av_find_input_format(arg);
+    if (!file_iformat) {
+        fprintf(stderr, "Unknown input format: %s\n", arg);
+        return AVERROR(EINVAL);
+    }
+    return 0;
+}
+
+static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
+{
+    av_log(NULL, AV_LOG_ERROR,
+           "Option '%s' has been removed, use private format options instead\n", opt);
+    return AVERROR(EINVAL);
+}
+
+static int opt_sync(void *optctx, const char *opt, const char *arg)
+{
+    if (!strcmp(arg, "audio"))
+        av_sync_type = AV_SYNC_AUDIO_MASTER;
+    else if (!strcmp(arg, "video"))
+        av_sync_type = AV_SYNC_VIDEO_MASTER;
+    else if (!strcmp(arg, "ext"))
+        av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
+    else {
+        fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
+        exit(1);
+    }
+    return 0;
+}
+
+static int opt_seek(void *optctx, const char *opt, const char *arg)
+{
+    start_time = parse_time_or_die(opt, arg, 1);
+    return 0;
+}
+
+static int opt_duration(void *optctx, const char *opt, const char *arg)
+{
+    duration = parse_time_or_die(opt, arg, 1);
+    return 0;
+}
+
+#define OFF(x) offsetof(PlayerState, x)
+static const OptionDef options[] = {
+    CMDUTILS_COMMON_OPTIONS
+    { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
+    { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
+    { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
+    { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
+    { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
+    { "vn", OPT_BOOL, { &video_disable }, "disable video" },
+    { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
+    { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
+    { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
+    { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
+    { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
+    { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
+    { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
+    { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
+    { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
+    { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
+    { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
+    { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
+    { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
+    { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
+    { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_loop_filter }, "", "" },
+    { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_frame }, "", "" },
+    { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_idct }, "", "" },
+    { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
+    { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
+    { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
+    { "noautoexit", OPT_BOOL | OPT_EXPERT, { &noautoexit }, "Do not exit at the end of playback", "" },
+    { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
+    { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
+    { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
+    { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
+    { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
+    { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
+    { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "video filters", "filter list" },
+    { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
+    { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catchall option", "" },
+    { "i", 0, { NULL }, "avconv compatibility dummy option", ""},
+    { "autorotate", OPT_BOOL, { &autorotate }, "automatically rotate video", "" },
+    { "c", HAS_ARG | OPT_STRING | OPT_SPEC | OPT_INPUT, { .off = OFF(codec_names) }, "codec name", "codec" },
+    { "codec",  HAS_ARG | OPT_STRING | OPT_SPEC | OPT_INPUT, { .off = OFF(codec_names) }, "codec name", "codec" },
+
+    { NULL, },
+};
+
+static void show_usage(void)
+{
+    printf("Simple media player\n");
+    printf("usage: %s [options] input_file\n", program_name);
+    printf("\n");
+}
+
+void show_help_default(const char *opt, const char *arg)
+{
+    av_log_set_callback(log_callback_help);
+    show_usage();
+    show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
+    show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
+    printf("\n");
+    show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
+    show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
+    printf("\nWhile playing:\n"
+           "q, ESC              quit\n"
+           "f                   toggle full screen\n"
+           "p, SPC              pause\n"
+           "a                   cycle audio channel\n"
+           "v                   cycle video channel\n"
+           "t                   cycle subtitle channel\n"
+           "w                   show audio waves\n"
+           "s                   activate frame-step mode\n"
+           "left/right          seek backward/forward 10 seconds\n"
+           "down/up             seek backward/forward 1 minute\n"
+           "mouse click         seek to percentage in file corresponding to fraction of width\n"
+           );
+}
+
+static void opt_input_file(void *optctx, const char *filename)
+{
+    if (input_filename) {
+        fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
+                filename, input_filename);
+        exit(1);
+    }
+    if (!strcmp(filename, "-"))
+        filename = "pipe:";
+    input_filename = filename;
+}
+
+/* Called from the main */
+int main(int argc, char **argv)
+{
+    int flags;
+
+    av_log_set_flags(AV_LOG_SKIP_REPEATED);
+    parse_loglevel(argc, argv, options);
+
+    /* register all codecs, demux and protocols */
+    avcodec_register_all();
+#if CONFIG_AVDEVICE
+    avdevice_register_all();
+#endif
+    avfilter_register_all();
+    av_register_all();
+    avformat_network_init();
+
+    init_opts();
+
+    show_banner();
+
+    parse_options(player, argc, argv, options, opt_input_file);
+
+    if (!input_filename) {
+        show_usage();
+        fprintf(stderr, "An input file must be specified\n");
+        fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
+        exit(1);
+    }
+
+    if (display_disable) {
+        video_disable = 1;
+    }
+    flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
+#if !defined(__MINGW32__) && !defined(__APPLE__)
+    flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
+#endif
+    if (SDL_Init (flags)) {
+        fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
+        exit(1);
+    }
+
+    if (!display_disable) {
+        const SDL_VideoInfo *vi = SDL_GetVideoInfo();
+        fs_screen_width = vi->current_w;
+        fs_screen_height = vi->current_h;
+    }
+
+    SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
+    SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
+    SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
+
+    av_init_packet(&flush_pkt);
+    flush_pkt.data = (uint8_t *)&flush_pkt;
+
+    if (stream_open(player, input_filename, file_iformat) < 0) {
+        fprintf(stderr, "Could not setup the player\n");
+        stream_close(player);
+        exit(1);
+    }
+
+    event_loop();
+
+    /* never returns */
+
+    return 0;
+}
diff --git a/avtools/avprobe.c b/avtools/avprobe.c
new file mode 100644
index 0000000000..613e090be6
--- /dev/null
+++ b/avtools/avprobe.c
@@ -0,0 +1,1187 @@
+/*
+ * avprobe : Simple Media Prober based on the Libav libraries
+ * Copyright (c) 2007-2010 Stefano Sabatini
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavformat/avformat.h"
+#include "libavcodec/avcodec.h"
+#include "libavutil/avstring.h"
+#include "libavutil/display.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/spherical.h"
+#include "libavutil/stereo3d.h"
+#include "libavutil/dict.h"
+#include "libavutil/libm.h"
+#include "libavdevice/avdevice.h"
+#include "cmdutils.h"
+
+typedef struct InputStream {
+    AVStream *st;
+
+    AVCodecContext *dec_ctx;
+} InputStream;
+
+typedef struct InputFile {
+    AVFormatContext *fmt_ctx;
+
+    InputStream *streams;
+    int       nb_streams;
+} InputFile;
+
+const char program_name[] = "avprobe";
+const int program_birth_year = 2007;
+
+static int do_show_format  = 0;
+static AVDictionary *fmt_entries_to_show = NULL;
+static int nb_fmt_entries_to_show;
+static int do_show_packets = 0;
+static int do_show_streams = 0;
+static AVDictionary *stream_entries_to_show = NULL;
+static int nb_stream_entries_to_show;
+
+/* key used to print when probe_{int,str}(NULL, ..) is invoked */
+static const char *header_key;
+
+static int show_value_unit              = 0;
+static int use_value_prefix             = 0;
+static int use_byte_value_binary_prefix = 0;
+static int use_value_sexagesimal_format = 0;
+
+/* globals */
+static const OptionDef *options;
+
+/* avprobe context */
+static const char *input_filename;
+static AVInputFormat *iformat = NULL;
+
+static const char *const binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
+static const char *const decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P"  };
+
+static const char unit_second_str[]         = "s"    ;
+static const char unit_hertz_str[]          = "Hz"   ;
+static const char unit_byte_str[]           = "byte" ;
+static const char unit_bit_per_second_str[] = "bit/s";
+
+static void avprobe_cleanup(int ret)
+{
+    av_dict_free(&fmt_entries_to_show);
+    av_dict_free(&stream_entries_to_show);
+}
+
+/*
+ * The output is structured in array and objects that might contain items
+ * Array could require the objects within to not be named.
+ * Object could require the items within to be named.
+ *
+ * For flat representation the name of each section is saved on prefix so it
+ * can be rendered in order to represent nested structures (e.g. array of
+ * objects for the packets list).
+ *
+ * Within an array each element can need an unique identifier or an index.
+ *
+ * Nesting level is accounted separately.
+ */
+
+typedef enum {
+    ARRAY,
+    OBJECT
+} PrintElementType;
+
+typedef struct PrintElement {
+    const char *name;
+    PrintElementType type;
+    int64_t index;
+    int64_t nb_elems;
+} PrintElement;
+
+typedef struct PrintContext {
+    PrintElement *prefix;
+    int level;
+    void (*print_header)(void);
+    void (*print_footer)(void);
+
+    void (*print_array_header) (const char *name, int plain_values);
+    void (*print_array_footer) (const char *name, int plain_values);
+    void (*print_object_header)(const char *name);
+    void (*print_object_footer)(const char *name);
+
+    void (*print_integer) (const char *key, int64_t value);
+    void (*print_string)  (const char *key, const char *value);
+} PrintContext;
+
+static AVIOContext *probe_out = NULL;
+static PrintContext octx;
+#define AVP_INDENT() avio_printf(probe_out, "%*c", octx.level * 2, ' ')
+
+/*
+ * Default format, INI
+ *
+ * - all key and values are utf8
+ * - '.' is the subgroup separator
+ * - newlines and the following characters are escaped
+ * - '\' is the escape character
+ * - '#' is the comment
+ * - '=' is the key/value separators
+ * - ':' is not used but usually parsed as key/value separator
+ */
+
+static void ini_print_header(void)
+{
+    avio_printf(probe_out, "# avprobe output\n\n");
+}
+static void ini_print_footer(void)
+{
+    avio_w8(probe_out, '\n');
+}
+
+static void ini_escape_print(const char *s)
+{
+    int i = 0;
+    char c = 0;
+
+    while (c = s[i++]) {
+        switch (c) {
+        case '\r': avio_printf(probe_out, "%s", "\\r"); break;
+        case '\n': avio_printf(probe_out, "%s", "\\n"); break;
+        case '\f': avio_printf(probe_out, "%s", "\\f"); break;
+        case '\b': avio_printf(probe_out, "%s", "\\b"); break;
+        case '\t': avio_printf(probe_out, "%s", "\\t"); break;
+        case '\\':
+        case '#' :
+        case '=' :
+        case ':' : avio_w8(probe_out, '\\');
+        default:
+            if ((unsigned char)c < 32)
+                avio_printf(probe_out, "\\x00%02x", c & 0xff);
+            else
+                avio_w8(probe_out, c);
+        break;
+        }
+    }
+}
+
+static void ini_print_array_header(const char *name, int plain_values)
+{
+    if (!plain_values) {
+        /* Add a new line if we create a new full group */
+        if (octx.prefix[octx.level -1].nb_elems)
+            avio_printf(probe_out, "\n");
+    } else {
+        ini_escape_print(name);
+        avio_w8(probe_out, '=');
+    }
+}
+
+static void ini_print_array_footer(const char *name, int plain_values)
+{
+    if (plain_values)
+        avio_printf(probe_out, "\n");
+}
+
+static void ini_print_object_header(const char *name)
+{
+    int i;
+    PrintElement *el = octx.prefix + octx.level -1;
+
+    if (el->nb_elems)
+        avio_printf(probe_out, "\n");
+
+    avio_printf(probe_out, "[");
+
+    for (i = 1; i < octx.level; i++) {
+        el = octx.prefix + i;
+        avio_printf(probe_out, "%s.", el->name);
+        if (el->index >= 0)
+            avio_printf(probe_out, "%"PRId64".", el->index);
+    }
+
+    avio_printf(probe_out, "%s", name);
+    if (el->type == ARRAY)
+        avio_printf(probe_out, ".%"PRId64"", el->nb_elems);
+    avio_printf(probe_out, "]\n");
+}
+
+static void ini_print_integer(const char *key, int64_t value)
+{
+    if (key) {
+        ini_escape_print(key);
+        avio_printf(probe_out, "=%"PRId64"\n", value);
+    } else {
+        if (octx.prefix[octx.level -1].nb_elems)
+            avio_printf(probe_out, ",");
+        avio_printf(probe_out, "%"PRId64, value);
+    }
+}
+
+
+static void ini_print_string(const char *key, const char *value)
+{
+    ini_escape_print(key);
+    avio_printf(probe_out, "=");
+    ini_escape_print(value);
+    avio_w8(probe_out, '\n');
+}
+
+/*
+ * Alternate format, JSON
+ */
+
+static void json_print_header(void)
+{
+    avio_printf(probe_out, "{");
+}
+static void json_print_footer(void)
+{
+    avio_printf(probe_out, "}\n");
+}
+
+static void json_print_array_header(const char *name, int plain_values)
+{
+    if (octx.prefix[octx.level -1].nb_elems)
+        avio_printf(probe_out, ",\n");
+    AVP_INDENT();
+    avio_printf(probe_out, "\"%s\" : ", name);
+    avio_printf(probe_out, "[\n");
+}
+
+static void json_print_array_footer(const char *name, int plain_values)
+{
+    avio_printf(probe_out, "\n");
+    AVP_INDENT();
+    avio_printf(probe_out, "]");
+}
+
+static void json_print_object_header(const char *name)
+{
+    if (octx.prefix[octx.level -1].nb_elems)
+        avio_printf(probe_out, ",\n");
+    AVP_INDENT();
+    if (octx.prefix[octx.level -1].type == OBJECT)
+        avio_printf(probe_out, "\"%s\" : ", name);
+    avio_printf(probe_out, "{\n");
+}
+
+static void json_print_object_footer(const char *name)
+{
+    avio_printf(probe_out, "\n");
+    AVP_INDENT();
+    avio_printf(probe_out, "}");
+}
+
+static void json_print_integer(const char *key, int64_t value)
+{
+    if (key) {
+        if (octx.prefix[octx.level -1].nb_elems)
+            avio_printf(probe_out, ",\n");
+        AVP_INDENT();
+        avio_printf(probe_out, "\"%s\" : ", key);
+    } else {
+        if (octx.prefix[octx.level -1].nb_elems)
+            avio_printf(probe_out, ", ");
+        else
+            AVP_INDENT();
+    }
+    avio_printf(probe_out, "%"PRId64, value);
+}
+
+static void json_escape_print(const char *s)
+{
+    int i = 0;
+    char c = 0;
+
+    while (c = s[i++]) {
+        switch (c) {
+        case '\r': avio_printf(probe_out, "%s", "\\r"); break;
+        case '\n': avio_printf(probe_out, "%s", "\\n"); break;
+        case '\f': avio_printf(probe_out, "%s", "\\f"); break;
+        case '\b': avio_printf(probe_out, "%s", "\\b"); break;
+        case '\t': avio_printf(probe_out, "%s", "\\t"); break;
+        case '\\':
+        case '"' : avio_w8(probe_out, '\\');
+        default:
+            if ((unsigned char)c < 32)
+                avio_printf(probe_out, "\\u00%02x", c & 0xff);
+            else
+                avio_w8(probe_out, c);
+        break;
+        }
+    }
+}
+
+static void json_print_string(const char *key, const char *value)
+{
+    if (octx.prefix[octx.level -1].nb_elems)
+        avio_printf(probe_out, ",\n");
+    AVP_INDENT();
+    avio_w8(probe_out, '\"');
+    json_escape_print(key);
+    avio_printf(probe_out, "\" : \"");
+    json_escape_print(value);
+    avio_w8(probe_out, '\"');
+}
+
+/*
+ * old-style pseudo-INI
+ */
+static void old_print_object_header(const char *name)
+{
+    char *str, *p;
+
+    if (!strcmp(name, "tags"))
+        return;
+
+    str = p = av_strdup(name);
+    if (!str)
+        return;
+    while (*p) {
+        *p = av_toupper(*p);
+        p++;
+    }
+
+    avio_printf(probe_out, "[%s]\n", str);
+    av_freep(&str);
+}
+
+static void old_print_object_footer(const char *name)
+{
+    char *str, *p;
+
+    if (!strcmp(name, "tags"))
+        return;
+
+    str = p = av_strdup(name);
+    if (!str)
+        return;
+    while (*p) {
+        *p = av_toupper(*p);
+        p++;
+    }
+
+    avio_printf(probe_out, "[/%s]\n", str);
+    av_freep(&str);
+}
+
+static void old_print_string(const char *key, const char *value)
+{
+    if (!strcmp(octx.prefix[octx.level - 1].name, "tags"))
+        avio_printf(probe_out, "TAG:");
+    ini_print_string(key, value);
+}
+
+/*
+ * Simple Formatter for single entries.
+ */
+
+static void show_format_entry_integer(const char *key, int64_t value)
+{
+    if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
+        if (nb_fmt_entries_to_show > 1)
+            avio_printf(probe_out, "%s=", key);
+        avio_printf(probe_out, "%"PRId64"\n", value);
+    }
+}
+
+static void show_format_entry_string(const char *key, const char *value)
+{
+    if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
+        if (nb_fmt_entries_to_show > 1)
+            avio_printf(probe_out, "%s=", key);
+        avio_printf(probe_out, "%s\n", value);
+    }
+}
+
+static void show_stream_entry_header(const char *key, int value)
+{
+    header_key = key;
+}
+
+static void show_stream_entry_footer(const char *key, int value)
+{
+    header_key = NULL;
+}
+
+static void show_stream_entry_integer(const char *key, int64_t value)
+{
+    if (!key)
+        key = header_key;
+
+    if (key && av_dict_get(stream_entries_to_show, key, NULL, 0)) {
+        if (nb_stream_entries_to_show > 1)
+            avio_printf(probe_out, "%s=", key);
+        avio_printf(probe_out, "%"PRId64"\n", value);
+    }
+}
+
+static void show_stream_entry_string(const char *key, const char *value)
+{
+    if (key && av_dict_get(stream_entries_to_show, key, NULL, 0)) {
+        if (nb_stream_entries_to_show > 1)
+            avio_printf(probe_out, "%s=", key);
+        avio_printf(probe_out, "%s\n", value);
+    }
+}
+
+static void probe_group_enter(const char *name, int type)
+{
+    int64_t count = -1;
+
+    octx.prefix =
+        av_realloc(octx.prefix, sizeof(PrintElement) * (octx.level + 1));
+
+    if (!octx.prefix || !name) {
+        fprintf(stderr, "Out of memory\n");
+        exit_program(1);
+    }
+
+    if (octx.level) {
+        PrintElement *parent = octx.prefix + octx.level -1;
+        if (parent->type == ARRAY)
+            count = parent->nb_elems;
+        parent->nb_elems++;
+    }
+
+    octx.prefix[octx.level++] = (PrintElement){name, type, count, 0};
+}
+
+static void probe_group_leave(void)
+{
+    --octx.level;
+}
+
+static void probe_header(void)
+{
+    if (octx.print_header)
+        octx.print_header();
+    probe_group_enter("root", OBJECT);
+}
+
+static void probe_footer(void)
+{
+    if (octx.print_footer)
+        octx.print_footer();
+    probe_group_leave();
+}
+
+
+static void probe_array_header(const char *name, int plain_values)
+{
+    if (octx.print_array_header)
+        octx.print_array_header(name, plain_values);
+
+    probe_group_enter(name, ARRAY);
+}
+
+static void probe_array_footer(const char *name, int plain_values)
+{
+    probe_group_leave();
+    if (octx.print_array_footer)
+        octx.print_array_footer(name, plain_values);
+}
+
+static void probe_object_header(const char *name)
+{
+    if (octx.print_object_header)
+        octx.print_object_header(name);
+
+    probe_group_enter(name, OBJECT);
+}
+
+static void probe_object_footer(const char *name)
+{
+    probe_group_leave();
+    if (octx.print_object_footer)
+        octx.print_object_footer(name);
+}
+
+static void probe_int(const char *key, int64_t value)
+{
+    octx.print_integer(key, value);
+    octx.prefix[octx.level -1].nb_elems++;
+}
+
+static void probe_str(const char *key, const char *value)
+{
+    octx.print_string(key, value);
+    octx.prefix[octx.level -1].nb_elems++;
+}
+
+static void probe_dict(AVDictionary *dict, const char *name)
+{
+    AVDictionaryEntry *entry = NULL;
+    if (!dict)
+        return;
+    probe_object_header(name);
+    while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
+        probe_str(entry->key, entry->value);
+    }
+    probe_object_footer(name);
+}
+
+static char *value_string(char *buf, int buf_size, double val, const char *unit)
+{
+    if (unit == unit_second_str && use_value_sexagesimal_format) {
+        double secs;
+        int hours, mins;
+        secs  = val;
+        mins  = (int)secs / 60;
+        secs  = secs - mins * 60;
+        hours = mins / 60;
+        mins %= 60;
+        snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
+    } else if (use_value_prefix) {
+        const char *prefix_string;
+        int index;
+
+        if (unit == unit_byte_str && use_byte_value_binary_prefix) {
+            index = (int) log2(val) / 10;
+            index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) - 1);
+            val  /= pow(2, index * 10);
+            prefix_string = binary_unit_prefixes[index];
+        } else {
+            index = (int) (log10(val)) / 3;
+            index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) - 1);
+            val  /= pow(10, index * 3);
+            prefix_string = decimal_unit_prefixes[index];
+        }
+        snprintf(buf, buf_size, "%.*f%s%s",
+                 index ? 3 : 0, val,
+                 prefix_string,
+                 show_value_unit ? unit : "");
+    } else {
+        snprintf(buf, buf_size, "%f%s", val, show_value_unit ? unit : "");
+    }
+
+    return buf;
+}
+
+static char *time_value_string(char *buf, int buf_size, int64_t val,
+                               const AVRational *time_base)
+{
+    if (val == AV_NOPTS_VALUE) {
+        snprintf(buf, buf_size, "N/A");
+    } else {
+        value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
+    }
+
+    return buf;
+}
+
+static char *ts_value_string(char *buf, int buf_size, int64_t ts)
+{
+    if (ts == AV_NOPTS_VALUE) {
+        snprintf(buf, buf_size, "N/A");
+    } else {
+        snprintf(buf, buf_size, "%"PRId64, ts);
+    }
+
+    return buf;
+}
+
+static char *rational_string(char *buf, int buf_size, const char *sep,
+                             const AVRational *rat)
+{
+    snprintf(buf, buf_size, "%d%s%d", rat->num, sep, rat->den);
+    return buf;
+}
+
+static char *tag_string(char *buf, int buf_size, int tag)
+{
+    snprintf(buf, buf_size, "0x%04x", tag);
+    return buf;
+}
+
+static void show_packet(AVFormatContext *fmt_ctx, AVPacket *pkt)
+{
+    char val_str[128];
+    AVStream *st = fmt_ctx->streams[pkt->stream_index];
+
+    probe_object_header("packet");
+    probe_str("codec_type", media_type_string(st->codecpar->codec_type));
+    probe_int("stream_index", pkt->stream_index);
+    probe_str("pts", ts_value_string(val_str, sizeof(val_str), pkt->pts));
+    probe_str("pts_time", time_value_string(val_str, sizeof(val_str),
+                                               pkt->pts, &st->time_base));
+    probe_str("dts", ts_value_string(val_str, sizeof(val_str), pkt->dts));
+    probe_str("dts_time", time_value_string(val_str, sizeof(val_str),
+                                               pkt->dts, &st->time_base));
+    probe_str("duration", ts_value_string(val_str, sizeof(val_str),
+                                             pkt->duration));
+    probe_str("duration_time", time_value_string(val_str, sizeof(val_str),
+                                                    pkt->duration,
+                                                    &st->time_base));
+    probe_str("size", value_string(val_str, sizeof(val_str),
+                                      pkt->size, unit_byte_str));
+    probe_int("pos", pkt->pos);
+    probe_str("flags", pkt->flags & AV_PKT_FLAG_KEY ? "K" : "_");
+    probe_object_footer("packet");
+}
+
+static void show_packets(InputFile *ifile)
+{
+    AVFormatContext *fmt_ctx = ifile->fmt_ctx;
+    AVPacket pkt;
+
+    av_init_packet(&pkt);
+    probe_array_header("packets", 0);
+    while (!av_read_frame(fmt_ctx, &pkt)) {
+        show_packet(fmt_ctx, &pkt);
+        av_packet_unref(&pkt);
+    }
+    probe_array_footer("packets", 0);
+}
+
+static void show_stream(InputFile *ifile, InputStream *ist)
+{
+    AVFormatContext *fmt_ctx = ifile->fmt_ctx;
+    AVStream *stream = ist->st;
+    AVCodecParameters *par;
+    AVCodecContext *dec_ctx;
+    const AVCodecDescriptor *codec_desc;
+    const char *profile;
+    char val_str[128];
+    AVRational display_aspect_ratio, *sar = NULL;
+    const AVPixFmtDescriptor *desc;
+
+    probe_object_header("stream");
+
+    probe_int("index", stream->index);
+
+    par     = stream->codecpar;
+    dec_ctx = ist->dec_ctx;
+    codec_desc = avcodec_descriptor_get(par->codec_id);
+    if (codec_desc) {
+        probe_str("codec_name", codec_desc->name);
+        probe_str("codec_long_name", codec_desc->long_name);
+    } else {
+        probe_str("codec_name", "unknown");
+    }
+
+    probe_str("codec_type", media_type_string(par->codec_type));
+
+    /* print AVI/FourCC tag */
+    av_get_codec_tag_string(val_str, sizeof(val_str), par->codec_tag);
+    probe_str("codec_tag_string", val_str);
+    probe_str("codec_tag", tag_string(val_str, sizeof(val_str),
+                                      par->codec_tag));
+
+    /* print profile, if there is one */
+    profile = avcodec_profile_name(par->codec_id, par->profile);
+    if (profile)
+        probe_str("profile", profile);
+
+    switch (par->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+        probe_int("width",  par->width);
+        probe_int("height", par->height);
+        if (dec_ctx) {
+            probe_int("coded_width",  dec_ctx->coded_width);
+            probe_int("coded_height", dec_ctx->coded_height);
+            probe_int("has_b_frames", dec_ctx->has_b_frames);
+        }
+        if (dec_ctx && dec_ctx->sample_aspect_ratio.num)
+            sar = &dec_ctx->sample_aspect_ratio;
+        else if (par->sample_aspect_ratio.num)
+            sar = &par->sample_aspect_ratio;
+        else if (stream->sample_aspect_ratio.num)
+            sar = &stream->sample_aspect_ratio;
+
+        if (sar) {
+            probe_str("sample_aspect_ratio",
+                      rational_string(val_str, sizeof(val_str), ":", sar));
+            av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
+                      par->width  * sar->num, par->height * sar->den,
+                      1024*1024);
+            probe_str("display_aspect_ratio",
+                      rational_string(val_str, sizeof(val_str), ":",
+                      &display_aspect_ratio));
+        }
+        desc = av_pix_fmt_desc_get(par->format);
+        probe_str("pix_fmt", desc ? desc->name : "unknown");
+        probe_int("level", par->level);
+
+        probe_str("color_range", av_color_range_name    (par->color_range));
+        probe_str("color_space", av_color_space_name    (par->color_space));
+        probe_str("color_trc",   av_color_transfer_name (par->color_trc));
+        probe_str("color_pri",   av_color_primaries_name(par->color_primaries));
+        probe_str("chroma_loc", av_chroma_location_name (par->chroma_location));
+        break;
+
+    case AVMEDIA_TYPE_AUDIO:
+        probe_str("sample_rate",
+                  value_string(val_str, sizeof(val_str),
+                               par->sample_rate,
+                               unit_hertz_str));
+        probe_int("channels", par->channels);
+        probe_int("bits_per_sample",
+                  av_get_bits_per_sample(par->codec_id));
+        break;
+    }
+
+    if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
+        probe_int("id", stream->id);
+    probe_str("avg_frame_rate",
+              rational_string(val_str, sizeof(val_str), "/",
+              &stream->avg_frame_rate));
+
+    if (par->bit_rate)
+        probe_str("bit_rate",
+                  value_string(val_str, sizeof(val_str),
+                               par->bit_rate, unit_bit_per_second_str));
+    probe_str("time_base",
+              rational_string(val_str, sizeof(val_str), "/",
+              &stream->time_base));
+    probe_str("start_time",
+              time_value_string(val_str, sizeof(val_str),
+                                stream->start_time, &stream->time_base));
+    probe_str("duration",
+              time_value_string(val_str, sizeof(val_str),
+                                stream->duration, &stream->time_base));
+    if (stream->nb_frames)
+        probe_int("nb_frames", stream->nb_frames);
+
+    probe_dict(stream->metadata, "tags");
+
+    if (stream->nb_side_data) {
+        int i, j;
+
+        probe_object_header("sidedata");
+        for (i = 0; i < stream->nb_side_data; i++) {
+            const AVPacketSideData* sd = &stream->side_data[i];
+            AVStereo3D *stereo;
+            AVSphericalMapping *spherical;
+
+            switch (sd->type) {
+            case AV_PKT_DATA_DISPLAYMATRIX:
+                probe_object_header("displaymatrix");
+                probe_array_header("matrix", 1);
+                for (j = 0; j < 9; j++)
+                    probe_int(NULL, ((int32_t *)sd->data)[j]);
+                probe_array_footer("matrix", 1);
+                probe_int("rotation",
+                          av_display_rotation_get((int32_t *)sd->data));
+                probe_object_footer("displaymatrix");
+                break;
+            case AV_PKT_DATA_STEREO3D:
+                stereo = (AVStereo3D *)sd->data;
+                probe_object_header("stereo3d");
+                probe_str("type", av_stereo3d_type_name(stereo->type));
+                probe_int("inverted",
+                          !!(stereo->flags & AV_STEREO3D_FLAG_INVERT));
+                probe_object_footer("stereo3d");
+                break;
+            case AV_PKT_DATA_SPHERICAL:
+                spherical = (AVSphericalMapping *)sd->data;
+                probe_object_header("spherical");
+
+                if (spherical->projection == AV_SPHERICAL_EQUIRECTANGULAR)
+                    probe_str("projection", "equirectangular");
+                else if (spherical->projection == AV_SPHERICAL_CUBEMAP)
+                    probe_str("projection", "cubemap");
+                else
+                    probe_str("projection", "unknown");
+
+                probe_object_header("orientation");
+                probe_int("yaw", (double) spherical->yaw / (1 << 16));
+                probe_int("pitch", (double) spherical->pitch / (1 << 16));
+                probe_int("roll", (double) spherical->roll / (1 << 16));
+                probe_object_footer("orientation");
+
+                probe_object_footer("spherical");
+                break;
+            }
+        }
+        probe_object_footer("sidedata");
+    }
+
+    probe_object_footer("stream");
+}
+
+static void show_format(InputFile *ifile)
+{
+    AVFormatContext *fmt_ctx = ifile->fmt_ctx;
+    char val_str[128];
+    int64_t size = fmt_ctx->pb ? avio_size(fmt_ctx->pb) : -1;
+
+    probe_object_header("format");
+    probe_str("filename",         fmt_ctx->filename);
+    probe_int("nb_streams",       fmt_ctx->nb_streams);
+    probe_str("format_name",      fmt_ctx->iformat->name);
+    probe_str("format_long_name", fmt_ctx->iformat->long_name);
+    probe_str("start_time",
+                       time_value_string(val_str, sizeof(val_str),
+                                         fmt_ctx->start_time, &AV_TIME_BASE_Q));
+    probe_str("duration",
+                       time_value_string(val_str, sizeof(val_str),
+                                         fmt_ctx->duration, &AV_TIME_BASE_Q));
+    probe_str("size",
+                       size >= 0 ? value_string(val_str, sizeof(val_str),
+                                                size, unit_byte_str)
+                                  : "unknown");
+    probe_str("bit_rate",
+                       value_string(val_str, sizeof(val_str),
+                                    fmt_ctx->bit_rate, unit_bit_per_second_str));
+
+    probe_dict(fmt_ctx->metadata, "tags");
+
+    probe_object_footer("format");
+}
+
+static int open_input_file(InputFile *ifile, const char *filename)
+{
+    int err, i;
+    AVFormatContext *fmt_ctx = NULL;
+    AVDictionaryEntry *t;
+
+    if ((err = avformat_open_input(&fmt_ctx, filename,
+                                   iformat, &format_opts)) < 0) {
+        print_error(filename, err);
+        return err;
+    }
+    if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
+        av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
+        return AVERROR_OPTION_NOT_FOUND;
+    }
+
+
+    /* fill the streams in the format context */
+    if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
+        print_error(filename, err);
+        return err;
+    }
+
+    av_dump_format(fmt_ctx, 0, filename, 0);
+
+    ifile->streams = av_mallocz_array(fmt_ctx->nb_streams,
+                                      sizeof(*ifile->streams));
+    if (!ifile->streams)
+        exit(1);
+    ifile->nb_streams = fmt_ctx->nb_streams;
+
+    /* bind a decoder to each input stream */
+    for (i = 0; i < fmt_ctx->nb_streams; i++) {
+        InputStream *ist = &ifile->streams[i];
+        AVStream *stream = fmt_ctx->streams[i];
+        AVCodec *codec;
+
+        ist->st = stream;
+
+        if (stream->codecpar->codec_id == AV_CODEC_ID_PROBE) {
+            fprintf(stderr, "Failed to probe codec for input stream %d\n",
+                    stream->index);
+            continue;
+        }
+
+        codec = avcodec_find_decoder(stream->codecpar->codec_id);
+        if (!codec) {
+            fprintf(stderr,
+                    "Unsupported codec with id %d for input stream %d\n",
+                    stream->codecpar->codec_id, stream->index);
+            continue;
+        }
+
+        ist->dec_ctx = avcodec_alloc_context3(codec);
+        if (!ist->dec_ctx)
+            exit(1);
+
+        err = avcodec_parameters_to_context(ist->dec_ctx, stream->codecpar);
+        if (err < 0)
+            exit(1);
+
+        err = avcodec_open2(ist->dec_ctx, NULL, NULL);
+        if (err < 0) {
+            fprintf(stderr, "Error while opening codec for input stream %d\n",
+                    stream->index);
+            exit(1);
+
+        }
+    }
+
+    ifile->fmt_ctx = fmt_ctx;
+    return 0;
+}
+
+static void close_input_file(InputFile *ifile)
+{
+    int i;
+
+    /* close decoder for each stream */
+    for (i = 0; i < ifile->nb_streams; i++) {
+        InputStream *ist = &ifile->streams[i];
+
+        avcodec_free_context(&ist->dec_ctx);
+    }
+
+    av_freep(&ifile->streams);
+    ifile->nb_streams = 0;
+
+    avformat_close_input(&ifile->fmt_ctx);
+}
+
+static int probe_file(const char *filename)
+{
+    InputFile ifile;
+    int ret, i;
+
+    ret = open_input_file(&ifile, filename);
+    if (ret < 0)
+        return ret;
+
+    if (do_show_format)
+        show_format(&ifile);
+
+    if (do_show_streams) {
+        probe_array_header("streams", 0);
+        for (i = 0; i < ifile.nb_streams; i++)
+            show_stream(&ifile, &ifile.streams[i]);
+        probe_array_footer("streams", 0);
+    }
+
+    if (do_show_packets)
+        show_packets(&ifile);
+
+    close_input_file(&ifile);
+    return 0;
+}
+
+static void show_usage(void)
+{
+    printf("Simple multimedia streams analyzer\n");
+    printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
+    printf("\n");
+}
+
+static int opt_format(void *optctx, const char *opt, const char *arg)
+{
+    iformat = av_find_input_format(arg);
+    if (!iformat) {
+        fprintf(stderr, "Unknown input format: %s\n", arg);
+        return AVERROR(EINVAL);
+    }
+    return 0;
+}
+
+static int opt_output_format(void *optctx, const char *opt, const char *arg)
+{
+
+    if (!strcmp(arg, "json")) {
+        octx.print_header        = json_print_header;
+        octx.print_footer        = json_print_footer;
+        octx.print_array_header  = json_print_array_header;
+        octx.print_array_footer  = json_print_array_footer;
+        octx.print_object_header = json_print_object_header;
+        octx.print_object_footer = json_print_object_footer;
+
+        octx.print_integer = json_print_integer;
+        octx.print_string  = json_print_string;
+    } else if (!strcmp(arg, "ini")) {
+        octx.print_header        = ini_print_header;
+        octx.print_footer        = ini_print_footer;
+        octx.print_array_header  = ini_print_array_header;
+        octx.print_array_footer  = ini_print_array_footer;
+        octx.print_object_header = ini_print_object_header;
+
+        octx.print_integer = ini_print_integer;
+        octx.print_string  = ini_print_string;
+    } else if (!strcmp(arg, "old")) {
+        octx.print_header        = NULL;
+        octx.print_object_header = old_print_object_header;
+        octx.print_object_footer = old_print_object_footer;
+
+        octx.print_string        = old_print_string;
+    } else {
+        av_log(NULL, AV_LOG_ERROR, "Unsupported formatter %s\n", arg);
+        return AVERROR(EINVAL);
+    }
+    return 0;
+}
+
+static int opt_show_format_entry(void *optctx, const char *opt, const char *arg)
+{
+    do_show_format = 1;
+    nb_fmt_entries_to_show++;
+    octx.print_header        = NULL;
+    octx.print_footer        = NULL;
+    octx.print_array_header  = NULL;
+    octx.print_array_footer  = NULL;
+    octx.print_object_header = NULL;
+    octx.print_object_footer = NULL;
+
+    octx.print_integer = show_format_entry_integer;
+    octx.print_string  = show_format_entry_string;
+    av_dict_set(&fmt_entries_to_show, arg, "", 0);
+    return 0;
+}
+
+static int opt_show_stream_entry(void *optctx, const char *opt, const char *arg)
+{
+    const char *p = arg;
+
+    do_show_streams = 1;
+    nb_stream_entries_to_show++;
+    octx.print_header        = NULL;
+    octx.print_footer        = NULL;
+    octx.print_array_header  = show_stream_entry_header;
+    octx.print_array_footer  = show_stream_entry_footer;
+    octx.print_object_header = NULL;
+    octx.print_object_footer = NULL;
+
+    octx.print_integer = show_stream_entry_integer;
+    octx.print_string  = show_stream_entry_string;
+
+    while (*p) {
+        char *val = av_get_token(&p, ",");
+        if (!val)
+            return AVERROR(ENOMEM);
+
+        av_dict_set(&stream_entries_to_show, val, "", 0);
+
+        av_free(val);
+        if (*p)
+            p++;
+    }
+
+    return 0;
+}
+
+static void opt_input_file(void *optctx, const char *arg)
+{
+    if (input_filename) {
+        fprintf(stderr,
+                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
+                arg, input_filename);
+        exit_program(1);
+    }
+    if (!strcmp(arg, "-"))
+        arg = "pipe:";
+    input_filename = arg;
+}
+
+void show_help_default(const char *opt, const char *arg)
+{
+    av_log_set_callback(log_callback_help);
+    show_usage();
+    show_help_options(options, "Main options:", 0, 0, 0);
+    printf("\n");
+    show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
+}
+
+static int opt_pretty(void *optctx, const char *opt, const char *arg)
+{
+    show_value_unit              = 1;
+    use_value_prefix             = 1;
+    use_byte_value_binary_prefix = 1;
+    use_value_sexagesimal_format = 1;
+    return 0;
+}
+
+static const OptionDef real_options[] = {
+    CMDUTILS_COMMON_OPTIONS
+    { "f", HAS_ARG, {.func_arg = opt_format}, "force format", "format" },
+    { "of", HAS_ARG, {.func_arg = opt_output_format}, "output the document either as ini or json", "output_format" },
+    { "unit", OPT_BOOL, {&show_value_unit},
+      "show unit of the displayed values" },
+    { "prefix", OPT_BOOL, {&use_value_prefix},
+      "use SI prefixes for the displayed values" },
+    { "byte_binary_prefix", OPT_BOOL, {&use_byte_value_binary_prefix},
+      "use binary prefixes for byte units" },
+    { "sexagesimal", OPT_BOOL,  {&use_value_sexagesimal_format},
+      "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
+    { "pretty", 0, {.func_arg = opt_pretty},
+      "prettify the format of displayed values, make it more human readable" },
+    { "show_format",  OPT_BOOL, {&do_show_format} , "show format/container info" },
+    { "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry},
+      "show a particular entry from the format/container info", "entry" },
+    { "show_packets", OPT_BOOL, {&do_show_packets}, "show packets info" },
+    { "show_streams", OPT_BOOL, {&do_show_streams}, "show streams info" },
+    { "show_stream_entry", HAS_ARG, {.func_arg = opt_show_stream_entry},
+      "show a particular entry from all streams (comma separated)", "entry" },
+    { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {.func_arg = opt_default},
+      "generic catch all option", "" },
+    { NULL, },
+};
+
+static int probe_buf_write(void *opaque, uint8_t *buf, int buf_size)
+{
+    printf("%.*s", buf_size, buf);
+    return 0;
+}
+
+#define AVP_BUFFSIZE 4096
+
+int main(int argc, char **argv)
+{
+    int ret;
+    uint8_t *buffer = av_malloc(AVP_BUFFSIZE);
+
+    if (!buffer)
+        exit(1);
+
+    register_exit(avprobe_cleanup);
+
+    options = real_options;
+    parse_loglevel(argc, argv, options);
+    av_register_all();
+    avformat_network_init();
+    init_opts();
+#if CONFIG_AVDEVICE
+    avdevice_register_all();
+#endif
+
+    show_banner();
+
+    octx.print_header = ini_print_header;
+    octx.print_footer = ini_print_footer;
+
+    octx.print_array_header = ini_print_array_header;
+    octx.print_array_footer = ini_print_array_footer;
+    octx.print_object_header = ini_print_object_header;
+
+    octx.print_integer = ini_print_integer;
+    octx.print_string = ini_print_string;
+
+    parse_options(NULL, argc, argv, options, opt_input_file);
+
+    if (!input_filename) {
+        show_usage();
+        fprintf(stderr, "You have to specify one input file.\n");
+        fprintf(stderr,
+                "Use -h to get full help or, even better, run 'man %s'.\n",
+                program_name);
+        exit_program(1);
+    }
+
+    probe_out = avio_alloc_context(buffer, AVP_BUFFSIZE, 1, NULL, NULL,
+                                 probe_buf_write, NULL);
+    if (!probe_out)
+        exit_program(1);
+
+    probe_header();
+    ret = probe_file(input_filename);
+    probe_footer();
+    avio_flush(probe_out);
+    avio_context_free(&probe_out);
+    av_freep(&buffer);
+    uninit_opts();
+    avformat_network_deinit();
+
+    return ret;
+}
diff --git a/avtools/cmdutils.c b/avtools/cmdutils.c
new file mode 100644
index 0000000000..b0445eb85b
--- /dev/null
+++ b/avtools/cmdutils.c
@@ -0,0 +1,1702 @@
+/*
+ * Various utilities for command line tools
+ * Copyright (c) 2000-2003 Fabrice Bellard
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <math.h>
+
+/* Include only the enabled headers since some compilers (namely, Sun
+   Studio) will not omit unused inline functions and create undefined
+   references to libraries that are not being built. */
+
+#include "config.h"
+#include "libavformat/avformat.h"
+#include "libavfilter/avfilter.h"
+#include "libavdevice/avdevice.h"
+#include "libavresample/avresample.h"
+#include "libswscale/swscale.h"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/eval.h"
+#include "libavutil/dict.h"
+#include "libavutil/opt.h"
+#include "libavutil/cpu.h"
+#include "avversion.h"
+#include "cmdutils.h"
+#if CONFIG_NETWORK
+#include "libavformat/network.h"
+#endif
+#if HAVE_SYS_RESOURCE_H
+#include <sys/time.h>
+#include <sys/resource.h>
+#endif
+
+struct SwsContext *sws_opts;
+AVDictionary *format_opts, *codec_opts, *resample_opts;
+
+static const int this_year = 2017;
+
+void init_opts(void)
+{
+#if CONFIG_SWSCALE
+    sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC,
+                              NULL, NULL, NULL);
+#endif
+}
+
+void uninit_opts(void)
+{
+#if CONFIG_SWSCALE
+    sws_freeContext(sws_opts);
+    sws_opts = NULL;
+#endif
+    av_dict_free(&format_opts);
+    av_dict_free(&codec_opts);
+    av_dict_free(&resample_opts);
+}
+
+void log_callback_help(void *ptr, int level, const char *fmt, va_list vl)
+{
+    vfprintf(stdout, fmt, vl);
+}
+
+static void (*program_exit)(int ret);
+
+void register_exit(void (*cb)(int ret))
+{
+    program_exit = cb;
+}
+
+void exit_program(int ret)
+{
+    if (program_exit)
+        program_exit(ret);
+
+    exit(ret);
+}
+
+double parse_number_or_die(const char *context, const char *numstr, int type,
+                           double min, double max)
+{
+    char *tail;
+    const char *error;
+    double d = av_strtod(numstr, &tail);
+    if (*tail)
+        error = "Expected number for %s but found: %s\n";
+    else if (d < min || d > max)
+        error = "The value for %s was %s which is not within %f - %f\n";
+    else if (type == OPT_INT64 && (int64_t)d != d)
+        error = "Expected int64 for %s but found %s\n";
+    else if (type == OPT_INT && (int)d != d)
+        error = "Expected int for %s but found %s\n";
+    else
+        return d;
+    av_log(NULL, AV_LOG_FATAL, error, context, numstr, min, max);
+    exit_program(1);
+    return 0;
+}
+
+int64_t parse_time_or_die(const char *context, const char *timestr,
+                          int is_duration)
+{
+    int64_t us;
+    if (av_parse_time(&us, timestr, is_duration) < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Invalid %s specification for %s: %s\n",
+               is_duration ? "duration" : "date", context, timestr);
+        exit_program(1);
+    }
+    return us;
+}
+
+void show_help_options(const OptionDef *options, const char *msg, int req_flags,
+                       int rej_flags, int alt_flags)
+{
+    const OptionDef *po;
+    int first;
+
+    first = 1;
+    for (po = options; po->name != NULL; po++) {
+        char buf[64];
+
+        if (((po->flags & req_flags) != req_flags) ||
+            (alt_flags && !(po->flags & alt_flags)) ||
+            (po->flags & rej_flags))
+            continue;
+
+        if (first) {
+            printf("%s\n", msg);
+            first = 0;
+        }
+        av_strlcpy(buf, po->name, sizeof(buf));
+        if (po->argname) {
+            av_strlcat(buf, " ", sizeof(buf));
+            av_strlcat(buf, po->argname, sizeof(buf));
+        }
+        printf("-%-17s  %s\n", buf, po->help);
+    }
+    printf("\n");
+}
+
+void show_help_children(const AVClass *class, int flags)
+{
+    const AVClass *child = NULL;
+    av_opt_show2(&class, NULL, flags, 0);
+    printf("\n");
+
+    while (child = av_opt_child_class_next(class, child))
+        show_help_children(child, flags);
+}
+
+static const OptionDef *find_option(const OptionDef *po, const char *name)
+{
+    const char *p = strchr(name, ':');
+    int len = p ? p - name : strlen(name);
+
+    while (po->name) {
+        if (!strncmp(name, po->name, len) && strlen(po->name) == len)
+            break;
+        po++;
+    }
+    return po;
+}
+
+/* _WIN32 means using the windows libc - cygwin doesn't define that
+ * by default. HAVE_COMMANDLINETOARGVW is true on cygwin, while
+ * it doesn't provide the actual command line via GetCommandLineW(). */
+#if HAVE_COMMANDLINETOARGVW && defined(_WIN32)
+#include <windows.h>
+#include <shellapi.h>
+/* Will be leaked on exit */
+static char** win32_argv_utf8 = NULL;
+static int win32_argc = 0;
+
+/**
+ * Prepare command line arguments for executable.
+ * For Windows - perform wide-char to UTF-8 conversion.
+ * Input arguments should be main() function arguments.
+ * @param argc_ptr Arguments number (including executable)
+ * @param argv_ptr Arguments list.
+ */
+static void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
+{
+    char *argstr_flat;
+    wchar_t **argv_w;
+    int i, buffsize = 0, offset = 0;
+
+    if (win32_argv_utf8) {
+        *argc_ptr = win32_argc;
+        *argv_ptr = win32_argv_utf8;
+        return;
+    }
+
+    win32_argc = 0;
+    argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
+    if (win32_argc <= 0 || !argv_w)
+        return;
+
+    /* determine the UTF-8 buffer size (including NULL-termination symbols) */
+    for (i = 0; i < win32_argc; i++)
+        buffsize += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
+                                        NULL, 0, NULL, NULL);
+
+    win32_argv_utf8 = av_mallocz(sizeof(char *) * (win32_argc + 1) + buffsize);
+    argstr_flat     = (char *)win32_argv_utf8 + sizeof(char *) * (win32_argc + 1);
+    if (!win32_argv_utf8) {
+        LocalFree(argv_w);
+        return;
+    }
+
+    for (i = 0; i < win32_argc; i++) {
+        win32_argv_utf8[i] = &argstr_flat[offset];
+        offset += WideCharToMultiByte(CP_UTF8, 0, argv_w[i], -1,
+                                      &argstr_flat[offset],
+                                      buffsize - offset, NULL, NULL);
+    }
+    win32_argv_utf8[i] = NULL;
+    LocalFree(argv_w);
+
+    *argc_ptr = win32_argc;
+    *argv_ptr = win32_argv_utf8;
+}
+#else
+static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
+{
+    /* nothing to do */
+}
+#endif /* HAVE_COMMANDLINETOARGVW */
+
+static int write_option(void *optctx, const OptionDef *po, const char *opt,
+                        const char *arg)
+{
+    /* new-style options contain an offset into optctx, old-style address of
+     * a global var*/
+    void *dst = po->flags & (OPT_OFFSET | OPT_SPEC) ?
+                (uint8_t *)optctx + po->u.off : po->u.dst_ptr;
+    int *dstcount;
+
+    if (po->flags & OPT_SPEC) {
+        SpecifierOpt **so = dst;
+        char *p = strchr(opt, ':');
+        char *str;
+
+        dstcount = (int *)(so + 1);
+        *so = grow_array(*so, sizeof(**so), dstcount, *dstcount + 1);
+        str = av_strdup(p ? p + 1 : "");
+        if (!str)
+            return AVERROR(ENOMEM);
+        (*so)[*dstcount - 1].specifier = str;
+        dst = &(*so)[*dstcount - 1].u;
+    }
+
+    if (po->flags & OPT_STRING) {
+        char *str;
+        str = av_strdup(arg);
+        av_freep(dst);
+        if (!str)
+            return AVERROR(ENOMEM);
+        *(char **)dst = str;
+    } else if (po->flags & OPT_BOOL || po->flags & OPT_INT) {
+        *(int *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
+    } else if (po->flags & OPT_INT64) {
+        *(int64_t *)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
+    } else if (po->flags & OPT_TIME) {
+        *(int64_t *)dst = parse_time_or_die(opt, arg, 1);
+    } else if (po->flags & OPT_FLOAT) {
+        *(float *)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
+    } else if (po->flags & OPT_DOUBLE) {
+        *(double *)dst = parse_number_or_die(opt, arg, OPT_DOUBLE, -INFINITY, INFINITY);
+    } else if (po->u.func_arg) {
+        int ret = po->u.func_arg(optctx, opt, arg);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR,
+                   "Failed to set value '%s' for option '%s'\n", arg, opt);
+            return ret;
+        }
+    }
+    if (po->flags & OPT_EXIT)
+        exit_program(0);
+
+    return 0;
+}
+
+int parse_option(void *optctx, const char *opt, const char *arg,
+                 const OptionDef *options)
+{
+    const OptionDef *po;
+    int ret;
+
+    po = find_option(options, opt);
+    if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
+        /* handle 'no' bool option */
+        po = find_option(options, opt + 2);
+        if ((po->name && (po->flags & OPT_BOOL)))
+            arg = "0";
+    } else if (po->flags & OPT_BOOL)
+        arg = "1";
+
+    if (!po->name)
+        po = find_option(options, "default");
+    if (!po->name) {
+        av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
+        return AVERROR(EINVAL);
+    }
+    if (po->flags & HAS_ARG && !arg) {
+        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
+        return AVERROR(EINVAL);
+    }
+
+    ret = write_option(optctx, po, opt, arg);
+    if (ret < 0)
+        return ret;
+
+    return !!(po->flags & HAS_ARG);
+}
+
+void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
+                   void (*parse_arg_function)(void *, const char*))
+{
+    const char *opt;
+    int optindex, handleoptions = 1, ret;
+
+    /* perform system-dependent conversions for arguments list */
+    prepare_app_arguments(&argc, &argv);
+
+    /* parse options */
+    optindex = 1;
+    while (optindex < argc) {
+        opt = argv[optindex++];
+
+        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
+            if (opt[1] == '-' && opt[2] == '\0') {
+                handleoptions = 0;
+                continue;
+            }
+            opt++;
+
+            if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
+                exit_program(1);
+            optindex += ret;
+        } else {
+            if (parse_arg_function)
+                parse_arg_function(optctx, opt);
+        }
+    }
+}
+
+int parse_optgroup(void *optctx, OptionGroup *g)
+{
+    int i, ret;
+
+    av_log(NULL, AV_LOG_DEBUG, "Parsing a group of options: %s %s.\n",
+           g->group_def->name, g->arg);
+
+    for (i = 0; i < g->nb_opts; i++) {
+        Option *o = &g->opts[i];
+
+        if (g->group_def->flags &&
+            !(g->group_def->flags & o->opt->flags)) {
+            av_log(NULL, AV_LOG_ERROR, "Option %s (%s) cannot be applied to "
+                   "%s %s -- you are trying to apply an input option to an "
+                   "output file or vice versa. Move this option before the "
+                   "file it belongs to.\n", o->key, o->opt->help,
+                   g->group_def->name, g->arg);
+            return AVERROR(EINVAL);
+        }
+
+        av_log(NULL, AV_LOG_DEBUG, "Applying option %s (%s) with argument %s.\n",
+               o->key, o->opt->help, o->val);
+
+        ret = write_option(optctx, o->opt, o->key, o->val);
+        if (ret < 0)
+            return ret;
+    }
+
+    av_log(NULL, AV_LOG_DEBUG, "Successfully parsed a group of options.\n");
+
+    return 0;
+}
+
+int locate_option(int argc, char **argv, const OptionDef *options,
+                  const char *optname)
+{
+    const OptionDef *po;
+    int i;
+
+    for (i = 1; i < argc; i++) {
+        const char *cur_opt = argv[i];
+
+        if (*cur_opt++ != '-')
+            continue;
+
+        po = find_option(options, cur_opt);
+        if (!po->name && cur_opt[0] == 'n' && cur_opt[1] == 'o')
+            po = find_option(options, cur_opt + 2);
+
+        if ((!po->name && !strcmp(cur_opt, optname)) ||
+             (po->name && !strcmp(optname, po->name)))
+            return i;
+
+        if (!po->name || po->flags & HAS_ARG)
+            i++;
+    }
+    return 0;
+}
+
+void parse_loglevel(int argc, char **argv, const OptionDef *options)
+{
+    int idx = locate_option(argc, argv, options, "loglevel");
+    if (!idx)
+        idx = locate_option(argc, argv, options, "v");
+    if (idx && argv[idx + 1])
+        opt_loglevel(NULL, "loglevel", argv[idx + 1]);
+}
+
+#define FLAGS (o->type == AV_OPT_TYPE_FLAGS) ? AV_DICT_APPEND : 0
+int opt_default(void *optctx, const char *opt, const char *arg)
+{
+    const AVOption *o;
+    char opt_stripped[128];
+    const char *p;
+    const AVClass *cc = avcodec_get_class(), *fc = avformat_get_class();
+#if CONFIG_AVRESAMPLE
+    const AVClass *rc = avresample_get_class();
+#endif
+#if CONFIG_SWSCALE
+    const AVClass *sc = sws_get_class();
+#endif
+
+    if (!(p = strchr(opt, ':')))
+        p = opt + strlen(opt);
+    av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
+
+    if ((o = av_opt_find(&cc, opt_stripped, NULL, 0,
+                         AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) ||
+        ((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
+         (o = av_opt_find(&cc, opt + 1, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ))))
+        av_dict_set(&codec_opts, opt, arg, FLAGS);
+    else if ((o = av_opt_find(&fc, opt, NULL, 0,
+                              AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)))
+        av_dict_set(&format_opts, opt, arg, FLAGS);
+#if CONFIG_AVRESAMPLE
+    else if ((o = av_opt_find(&rc, opt, NULL, 0,
+                              AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)))
+        av_dict_set(&resample_opts, opt, arg, FLAGS);
+#endif
+#if CONFIG_SWSCALE
+    else if ((o = av_opt_find(&sc, opt, NULL, 0,
+                              AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ))) {
+        // XXX we only support sws_flags, not arbitrary sws options
+        int ret = av_opt_set(sws_opts, opt, arg, 0);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error setting option %s.\n", opt);
+            return ret;
+        }
+    }
+#endif
+
+    if (o)
+        return 0;
+    return AVERROR_OPTION_NOT_FOUND;
+}
+
+/*
+ * Check whether given option is a group separator.
+ *
+ * @return index of the group definition that matched or -1 if none
+ */
+static int match_group_separator(const OptionGroupDef *groups, int nb_groups,
+                                 const char *opt)
+{
+    int i;
+
+    for (i = 0; i < nb_groups; i++) {
+        const OptionGroupDef *p = &groups[i];
+        if (p->sep && !strcmp(p->sep, opt))
+            return i;
+    }
+
+    return -1;
+}
+
+/*
+ * Finish parsing an option group.
+ *
+ * @param group_idx which group definition should this group belong to
+ * @param arg argument of the group delimiting option
+ */
+static void finish_group(OptionParseContext *octx, int group_idx,
+                         const char *arg)
+{
+    OptionGroupList *l = &octx->groups[group_idx];
+    OptionGroup *g;
+
+    GROW_ARRAY(l->groups, l->nb_groups);
+    g = &l->groups[l->nb_groups - 1];
+
+    *g             = octx->cur_group;
+    g->arg         = arg;
+    g->group_def   = l->group_def;
+#if CONFIG_SWSCALE
+    g->sws_opts    = sws_opts;
+#endif
+    g->codec_opts  = codec_opts;
+    g->format_opts = format_opts;
+    g->resample_opts = resample_opts;
+
+    codec_opts  = NULL;
+    format_opts = NULL;
+    resample_opts = NULL;
+#if CONFIG_SWSCALE
+    sws_opts    = NULL;
+#endif
+    init_opts();
+
+    memset(&octx->cur_group, 0, sizeof(octx->cur_group));
+}
+
+/*
+ * Add an option instance to currently parsed group.
+ */
+static void add_opt(OptionParseContext *octx, const OptionDef *opt,
+                    const char *key, const char *val)
+{
+    int global = !(opt->flags & (OPT_PERFILE | OPT_SPEC | OPT_OFFSET));
+    OptionGroup *g = global ? &octx->global_opts : &octx->cur_group;
+
+    GROW_ARRAY(g->opts, g->nb_opts);
+    g->opts[g->nb_opts - 1].opt = opt;
+    g->opts[g->nb_opts - 1].key = key;
+    g->opts[g->nb_opts - 1].val = val;
+}
+
+static void init_parse_context(OptionParseContext *octx,
+                               const OptionGroupDef *groups, int nb_groups)
+{
+    static const OptionGroupDef global_group = { "global" };
+    int i;
+
+    memset(octx, 0, sizeof(*octx));
+
+    octx->nb_groups = nb_groups;
+    octx->groups    = av_mallocz(sizeof(*octx->groups) * octx->nb_groups);
+    if (!octx->groups)
+        exit_program(1);
+
+    for (i = 0; i < octx->nb_groups; i++)
+        octx->groups[i].group_def = &groups[i];
+
+    octx->global_opts.group_def = &global_group;
+    octx->global_opts.arg       = "";
+
+    init_opts();
+}
+
+void uninit_parse_context(OptionParseContext *octx)
+{
+    int i, j;
+
+    for (i = 0; i < octx->nb_groups; i++) {
+        OptionGroupList *l = &octx->groups[i];
+
+        for (j = 0; j < l->nb_groups; j++) {
+            av_freep(&l->groups[j].opts);
+            av_dict_free(&l->groups[j].codec_opts);
+            av_dict_free(&l->groups[j].format_opts);
+            av_dict_free(&l->groups[j].resample_opts);
+#if CONFIG_SWSCALE
+            sws_freeContext(l->groups[j].sws_opts);
+#endif
+        }
+        av_freep(&l->groups);
+    }
+    av_freep(&octx->groups);
+
+    av_freep(&octx->cur_group.opts);
+    av_freep(&octx->global_opts.opts);
+
+    uninit_opts();
+}
+
+int split_commandline(OptionParseContext *octx, int argc, char *argv[],
+                      const OptionDef *options,
+                      const OptionGroupDef *groups, int nb_groups)
+{
+    int optindex = 1;
+
+    /* perform system-dependent conversions for arguments list */
+    prepare_app_arguments(&argc, &argv);
+
+    init_parse_context(octx, groups, nb_groups);
+    av_log(NULL, AV_LOG_DEBUG, "Splitting the commandline.\n");
+
+    while (optindex < argc) {
+        const char *opt = argv[optindex++], *arg;
+        const OptionDef *po;
+        int ret;
+
+        av_log(NULL, AV_LOG_DEBUG, "Reading option '%s' ...", opt);
+
+        /* unnamed group separators, e.g. output filename */
+        if (opt[0] != '-' || !opt[1]) {
+            finish_group(octx, 0, opt);
+            av_log(NULL, AV_LOG_DEBUG, " matched as %s.\n", groups[0].name);
+            continue;
+        }
+        opt++;
+
+#define GET_ARG(arg)                                                           \
+do {                                                                           \
+    arg = argv[optindex++];                                                    \
+    if (!arg) {                                                                \
+        av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'.\n", opt);\
+        return AVERROR(EINVAL);                                                \
+    }                                                                          \
+} while (0)
+
+        /* named group separators, e.g. -i */
+        if ((ret = match_group_separator(groups, nb_groups, opt)) >= 0) {
+            GET_ARG(arg);
+            finish_group(octx, ret, arg);
+            av_log(NULL, AV_LOG_DEBUG, " matched as %s with argument '%s'.\n",
+                   groups[ret].name, arg);
+            continue;
+        }
+
+        /* normal options */
+        po = find_option(options, opt);
+        if (po->name) {
+            if (po->flags & OPT_EXIT) {
+                /* optional argument, e.g. -h */
+                arg = argv[optindex++];
+            } else if (po->flags & HAS_ARG) {
+                GET_ARG(arg);
+            } else {
+                arg = "1";
+            }
+
+            add_opt(octx, po, opt, arg);
+            av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
+                   "argument '%s'.\n", po->name, po->help, arg);
+            continue;
+        }
+
+        /* AVOptions */
+        if (argv[optindex]) {
+            ret = opt_default(NULL, opt, argv[optindex]);
+            if (ret >= 0) {
+                av_log(NULL, AV_LOG_DEBUG, " matched as AVOption '%s' with "
+                       "argument '%s'.\n", opt, argv[optindex]);
+                optindex++;
+                continue;
+            } else if (ret != AVERROR_OPTION_NOT_FOUND) {
+                av_log(NULL, AV_LOG_ERROR, "Error parsing option '%s' "
+                       "with argument '%s'.\n", opt, argv[optindex]);
+                return ret;
+            }
+        }
+
+        /* boolean -nofoo options */
+        if (opt[0] == 'n' && opt[1] == 'o' &&
+            (po = find_option(options, opt + 2)) &&
+            po->name && po->flags & OPT_BOOL) {
+            add_opt(octx, po, opt, "0");
+            av_log(NULL, AV_LOG_DEBUG, " matched as option '%s' (%s) with "
+                   "argument 0.\n", po->name, po->help);
+            continue;
+        }
+
+        av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'.\n", opt);
+        return AVERROR_OPTION_NOT_FOUND;
+    }
+
+    if (octx->cur_group.nb_opts || codec_opts || format_opts || resample_opts)
+        av_log(NULL, AV_LOG_WARNING, "Trailing options were found on the "
+               "commandline.\n");
+
+    av_log(NULL, AV_LOG_DEBUG, "Finished splitting the commandline.\n");
+
+    return 0;
+}
+
+int opt_cpuflags(void *optctx, const char *opt, const char *arg)
+{
+    int flags = av_parse_cpu_flags(arg);
+
+    if (flags < 0)
+        return flags;
+
+    av_set_cpu_flags_mask(flags);
+    return 0;
+}
+
+int opt_loglevel(void *optctx, const char *opt, const char *arg)
+{
+    const struct { const char *name; int level; } log_levels[] = {
+        { "quiet"  , AV_LOG_QUIET   },
+        { "panic"  , AV_LOG_PANIC   },
+        { "fatal"  , AV_LOG_FATAL   },
+        { "error"  , AV_LOG_ERROR   },
+        { "warning", AV_LOG_WARNING },
+        { "info"   , AV_LOG_INFO    },
+        { "verbose", AV_LOG_VERBOSE },
+        { "debug"  , AV_LOG_DEBUG   },
+        { "trace"  , AV_LOG_TRACE   },
+    };
+    char *tail;
+    int level;
+    int i;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
+        if (!strcmp(log_levels[i].name, arg)) {
+            av_log_set_level(log_levels[i].level);
+            return 0;
+        }
+    }
+
+    level = strtol(arg, &tail, 10);
+    if (*tail) {
+        av_log(NULL, AV_LOG_FATAL, "Invalid loglevel \"%s\". "
+               "Possible levels are numbers or:\n", arg);
+        for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
+            av_log(NULL, AV_LOG_FATAL, "\"%s\"\n", log_levels[i].name);
+        exit_program(1);
+    }
+    av_log_set_level(level);
+    return 0;
+}
+
+int opt_timelimit(void *optctx, const char *opt, const char *arg)
+{
+#if HAVE_SETRLIMIT
+    int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
+    struct rlimit rl = { lim, lim + 1 };
+    if (setrlimit(RLIMIT_CPU, &rl))
+        perror("setrlimit");
+#else
+    av_log(NULL, AV_LOG_WARNING, "-%s not implemented on this OS\n", opt);
+#endif
+    return 0;
+}
+
+void print_error(const char *filename, int err)
+{
+    char errbuf[128];
+    const char *errbuf_ptr = errbuf;
+
+    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
+        errbuf_ptr = strerror(AVUNERROR(err));
+    av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, errbuf_ptr);
+}
+
+static int warned_cfg = 0;
+
+#define INDENT        1
+#define SHOW_VERSION  2
+#define SHOW_CONFIG   4
+
+#define PRINT_LIB_INFO(libname, LIBNAME, flags, level)                  \
+    if (CONFIG_##LIBNAME) {                                             \
+        const char *indent = flags & INDENT? "  " : "";                 \
+        if (flags & SHOW_VERSION) {                                     \
+            unsigned int version = libname##_version();                 \
+            av_log(NULL, level,                                         \
+                   "%slib%-10s %2d.%3d.%2d / %2d.%3d.%2d\n",            \
+                   indent, #libname,                                    \
+                   LIB##LIBNAME##_VERSION_MAJOR,                        \
+                   LIB##LIBNAME##_VERSION_MINOR,                        \
+                   LIB##LIBNAME##_VERSION_MICRO,                        \
+                   version >> 16, version >> 8 & 0xff, version & 0xff); \
+        }                                                               \
+        if (flags & SHOW_CONFIG) {                                      \
+            const char *cfg = libname##_configuration();                \
+            if (strcmp(LIBAV_CONFIGURATION, cfg)) {                     \
+                if (!warned_cfg) {                                      \
+                    av_log(NULL, level,                                 \
+                            "%sWARNING: library configuration mismatch\n", \
+                            indent);                                    \
+                    warned_cfg = 1;                                     \
+                }                                                       \
+                av_log(NULL, level, "%s%-11s configuration: %s\n",      \
+                        indent, #libname, cfg);                         \
+            }                                                           \
+        }                                                               \
+    }                                                                   \
+
+static void print_all_libs_info(int flags, int level)
+{
+    PRINT_LIB_INFO(avutil,   AVUTIL,   flags, level);
+    PRINT_LIB_INFO(avcodec,  AVCODEC,  flags, level);
+    PRINT_LIB_INFO(avformat, AVFORMAT, flags, level);
+    PRINT_LIB_INFO(avdevice, AVDEVICE, flags, level);
+    PRINT_LIB_INFO(avfilter, AVFILTER, flags, level);
+    PRINT_LIB_INFO(avresample, AVRESAMPLE, flags, level);
+    PRINT_LIB_INFO(swscale,  SWSCALE,  flags, level);
+}
+
+void show_banner(void)
+{
+    av_log(NULL, AV_LOG_INFO,
+           "%s version " LIBAV_VERSION ", Copyright (c) %d-%d the Libav developers\n",
+           program_name, program_birth_year, this_year);
+    av_log(NULL, AV_LOG_INFO, "  built on %s %s with %s\n",
+           __DATE__, __TIME__, CC_IDENT);
+    av_log(NULL, AV_LOG_VERBOSE, "  configuration: " LIBAV_CONFIGURATION "\n");
+    print_all_libs_info(INDENT|SHOW_CONFIG,  AV_LOG_VERBOSE);
+    print_all_libs_info(INDENT|SHOW_VERSION, AV_LOG_VERBOSE);
+}
+
+int show_version(void *optctx, const char *opt, const char *arg)
+{
+    av_log_set_callback(log_callback_help);
+    printf("%s " LIBAV_VERSION "\n", program_name);
+    print_all_libs_info(SHOW_VERSION, AV_LOG_INFO);
+
+    return 0;
+}
+
+int show_license(void *optctx, const char *opt, const char *arg)
+{
+    printf(
+#if CONFIG_NONFREE
+    "This version of %s has nonfree parts compiled in.\n"
+    "Therefore it is not legally redistributable.\n",
+    program_name
+#elif CONFIG_GPLV3
+    "%s is free software; you can redistribute it and/or modify\n"
+    "it under the terms of the GNU General Public License as published by\n"
+    "the Free Software Foundation; either version 3 of the License, or\n"
+    "(at your option) any later version.\n"
+    "\n"
+    "%s is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+    "GNU General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU General Public License\n"
+    "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
+    program_name, program_name, program_name
+#elif CONFIG_GPL
+    "%s is free software; you can redistribute it and/or modify\n"
+    "it under the terms of the GNU General Public License as published by\n"
+    "the Free Software Foundation; either version 2 of the License, or\n"
+    "(at your option) any later version.\n"
+    "\n"
+    "%s is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+    "GNU General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU General Public License\n"
+    "along with %s; if not, write to the Free Software\n"
+    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
+    program_name, program_name, program_name
+#elif CONFIG_LGPLV3
+    "%s is free software; you can redistribute it and/or modify\n"
+    "it under the terms of the GNU Lesser General Public License as published by\n"
+    "the Free Software Foundation; either version 3 of the License, or\n"
+    "(at your option) any later version.\n"
+    "\n"
+    "%s is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+    "GNU Lesser General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU Lesser General Public License\n"
+    "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
+    program_name, program_name, program_name
+#else
+    "%s is free software; you can redistribute it and/or\n"
+    "modify it under the terms of the GNU Lesser General Public\n"
+    "License as published by the Free Software Foundation; either\n"
+    "version 2.1 of the License, or (at your option) any later version.\n"
+    "\n"
+    "%s is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
+    "Lesser General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU Lesser General Public\n"
+    "License along with %s; if not, write to the Free Software\n"
+    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
+    program_name, program_name, program_name
+#endif
+    );
+
+    return 0;
+}
+
+int show_formats(void *optctx, const char *opt, const char *arg)
+{
+    AVInputFormat *ifmt  = NULL;
+    AVOutputFormat *ofmt = NULL;
+    const char *last_name;
+
+    printf("File formats:\n"
+           " D. = Demuxing supported\n"
+           " .E = Muxing supported\n"
+           " --\n");
+    last_name = "000";
+    for (;;) {
+        int decode = 0;
+        int encode = 0;
+        const char *name      = NULL;
+        const char *long_name = NULL;
+
+        while ((ofmt = av_oformat_next(ofmt))) {
+            if ((!name || strcmp(ofmt->name, name) < 0) &&
+                strcmp(ofmt->name, last_name) > 0) {
+                name      = ofmt->name;
+                long_name = ofmt->long_name;
+                encode    = 1;
+            }
+        }
+        while ((ifmt = av_iformat_next(ifmt))) {
+            if ((!name || strcmp(ifmt->name, name) < 0) &&
+                strcmp(ifmt->name, last_name) > 0) {
+                name      = ifmt->name;
+                long_name = ifmt->long_name;
+                encode    = 0;
+            }
+            if (name && strcmp(ifmt->name, name) == 0)
+                decode = 1;
+        }
+        if (!name)
+            break;
+        last_name = name;
+
+        printf(" %s%s %-15s %s\n",
+               decode ? "D" : " ",
+               encode ? "E" : " ",
+               name,
+            long_name ? long_name:" ");
+    }
+    return 0;
+}
+
+#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
+    if (codec->field) {                                                      \
+        const type *p = c->field;                                            \
+                                                                             \
+        printf("    Supported " list_name ":");                              \
+        while (*p != term) {                                                 \
+            get_name(*p);                                                    \
+            printf(" %s", name);                                             \
+            p++;                                                             \
+        }                                                                    \
+        printf("\n");                                                        \
+    }                                                                        \
+
+static void print_codec(const AVCodec *c)
+{
+    int encoder = av_codec_is_encoder(c);
+
+    printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
+           c->long_name ? c->long_name : "");
+
+    printf("    General capabilities: ");
+    if (c->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)
+        printf("horizband ");
+    if (c->capabilities & AV_CODEC_CAP_DR1)
+        printf("dr1 ");
+    if (c->capabilities & AV_CODEC_CAP_TRUNCATED)
+        printf("trunc ");
+    if (c->capabilities & AV_CODEC_CAP_DELAY)
+        printf("delay ");
+    if (c->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME)
+        printf("small ");
+    if (c->capabilities & AV_CODEC_CAP_SUBFRAMES)
+        printf("subframes ");
+    if (c->capabilities & AV_CODEC_CAP_EXPERIMENTAL)
+        printf("exp ");
+    if (c->capabilities & AV_CODEC_CAP_CHANNEL_CONF)
+        printf("chconf ");
+    if (c->capabilities & AV_CODEC_CAP_PARAM_CHANGE)
+        printf("paramchange ");
+    if (c->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)
+        printf("variable ");
+    if (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
+                           AV_CODEC_CAP_SLICE_THREADS |
+                           AV_CODEC_CAP_AUTO_THREADS))
+        printf("threads ");
+    if (!c->capabilities)
+        printf("none");
+    printf("\n");
+
+    if (c->type == AVMEDIA_TYPE_VIDEO) {
+        printf("    Threading capabilities: ");
+        switch (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
+                                   AV_CODEC_CAP_SLICE_THREADS |
+                                   AV_CODEC_CAP_AUTO_THREADS)) {
+        case AV_CODEC_CAP_FRAME_THREADS |
+             AV_CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
+        case AV_CODEC_CAP_FRAME_THREADS: printf("frame");           break;
+        case AV_CODEC_CAP_SLICE_THREADS: printf("slice");           break;
+        case AV_CODEC_CAP_AUTO_THREADS : printf("auto");            break;
+        default:                         printf("none");            break;
+        }
+        printf("\n");
+    }
+
+    if (c->supported_framerates) {
+        const AVRational *fps = c->supported_framerates;
+
+        printf("    Supported framerates:");
+        while (fps->num) {
+            printf(" %d/%d", fps->num, fps->den);
+            fps++;
+        }
+        printf("\n");
+    }
+    PRINT_CODEC_SUPPORTED(c, pix_fmts, enum AVPixelFormat, "pixel formats",
+                          AV_PIX_FMT_NONE, GET_PIX_FMT_NAME);
+    PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
+                          GET_SAMPLE_RATE_NAME);
+    PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
+                          AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
+    PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
+                          0, GET_CH_LAYOUT_DESC);
+
+    if (c->priv_class) {
+        show_help_children(c->priv_class,
+                           AV_OPT_FLAG_ENCODING_PARAM |
+                           AV_OPT_FLAG_DECODING_PARAM);
+    }
+}
+
+static char get_media_type_char(enum AVMediaType type)
+{
+    switch (type) {
+        case AVMEDIA_TYPE_VIDEO:    return 'V';
+        case AVMEDIA_TYPE_AUDIO:    return 'A';
+        case AVMEDIA_TYPE_SUBTITLE: return 'S';
+        default:                    return '?';
+    }
+}
+
+static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
+                                        int encoder)
+{
+    while ((prev = av_codec_next(prev))) {
+        if (prev->id == id &&
+            (encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
+            return prev;
+    }
+    return NULL;
+}
+
+static void print_codecs_for_id(enum AVCodecID id, int encoder)
+{
+    const AVCodec *codec = NULL;
+
+    printf(" (%s: ", encoder ? "encoders" : "decoders");
+
+    while ((codec = next_codec_for_id(id, codec, encoder)))
+        printf("%s ", codec->name);
+
+    printf(")");
+}
+
+int show_codecs(void *optctx, const char *opt, const char *arg)
+{
+    const AVCodecDescriptor *desc = NULL;
+
+    printf("Codecs:\n"
+           " D..... = Decoding supported\n"
+           " .E.... = Encoding supported\n"
+           " ..V... = Video codec\n"
+           " ..A... = Audio codec\n"
+           " ..S... = Subtitle codec\n"
+           " ...I.. = Intra frame-only codec\n"
+           " ....L. = Lossy compression\n"
+           " .....S = Lossless compression\n"
+           " -------\n");
+    while ((desc = avcodec_descriptor_next(desc))) {
+        const AVCodec *codec = NULL;
+
+        printf(avcodec_find_decoder(desc->id) ? "D" : ".");
+        printf(avcodec_find_encoder(desc->id) ? "E" : ".");
+
+        printf("%c", get_media_type_char(desc->type));
+        printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
+        printf((desc->props & AV_CODEC_PROP_LOSSY)      ? "L" : ".");
+        printf((desc->props & AV_CODEC_PROP_LOSSLESS)   ? "S" : ".");
+
+        printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
+
+        /* print decoders/encoders when there's more than one or their
+         * names are different from codec name */
+        while ((codec = next_codec_for_id(desc->id, codec, 0))) {
+            if (strcmp(codec->name, desc->name)) {
+                print_codecs_for_id(desc->id, 0);
+                break;
+            }
+        }
+        codec = NULL;
+        while ((codec = next_codec_for_id(desc->id, codec, 1))) {
+            if (strcmp(codec->name, desc->name)) {
+                print_codecs_for_id(desc->id, 1);
+                break;
+            }
+        }
+
+        printf("\n");
+    }
+    return 0;
+}
+
+static void print_codecs(int encoder)
+{
+    const AVCodecDescriptor *desc = NULL;
+
+    printf("%s:\n"
+           " V... = Video\n"
+           " A... = Audio\n"
+           " S... = Subtitle\n"
+           " .F.. = Frame-level multithreading\n"
+           " ..S. = Slice-level multithreading\n"
+           " ...X = Codec is experimental\n"
+           " ---\n",
+           encoder ? "Encoders" : "Decoders");
+    while ((desc = avcodec_descriptor_next(desc))) {
+        const AVCodec *codec = NULL;
+
+        while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
+            printf("%c", get_media_type_char(desc->type));
+            printf((codec->capabilities & AV_CODEC_CAP_FRAME_THREADS) ? "F" : ".");
+            printf((codec->capabilities & AV_CODEC_CAP_SLICE_THREADS) ? "S" : ".");
+            printf((codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL)  ? "X" : ".");
+
+            printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
+            if (strcmp(codec->name, desc->name))
+                printf(" (codec %s)", desc->name);
+
+            printf("\n");
+        }
+    }
+}
+
+int show_decoders(void *optctx, const char *opt, const char *arg)
+{
+    print_codecs(0);
+    return 0;
+}
+
+int show_encoders(void *optctx, const char *opt, const char *arg)
+{
+    print_codecs(1);
+    return 0;
+}
+
+int show_bsfs(void *optctx, const char *opt, const char *arg)
+{
+    const AVBitStreamFilter *bsf = NULL;
+    void *opaque = NULL;
+
+    printf("Bitstream filters:\n");
+    while ((bsf = av_bsf_next(&opaque)))
+        printf("%s\n", bsf->name);
+    printf("\n");
+    return 0;
+}
+
+int show_protocols(void *optctx, const char *opt, const char *arg)
+{
+    void *opaque = NULL;
+    const char *name;
+
+    printf("Supported file protocols:\n"
+           "Input:\n");
+    while ((name = avio_enum_protocols(&opaque, 0)))
+        printf("%s\n", name);
+    printf("Output:\n");
+    while ((name = avio_enum_protocols(&opaque, 1)))
+        printf("%s\n", name);
+    return 0;
+}
+
+int show_filters(void *optctx, const char *opt, const char *arg)
+{
+#if CONFIG_AVFILTER
+    const AVFilter *filter = NULL;
+
+    printf("Filters:\n");
+    while ((filter = avfilter_next(filter)))
+        printf("%-16s %s\n", filter->name, filter->description);
+#else
+    printf("No filters available: libavfilter disabled\n");
+#endif
+    return 0;
+}
+
+int show_pix_fmts(void *optctx, const char *opt, const char *arg)
+{
+    const AVPixFmtDescriptor *pix_desc = NULL;
+
+    printf("Pixel formats:\n"
+           "I.... = Supported Input  format for conversion\n"
+           ".O... = Supported Output format for conversion\n"
+           "..H.. = Hardware accelerated format\n"
+           "...P. = Paletted format\n"
+           "....B = Bitstream format\n"
+           "FLAGS NAME            NB_COMPONENTS BITS_PER_PIXEL\n"
+           "-----\n");
+
+#if !CONFIG_SWSCALE
+#   define sws_isSupportedInput(x)  0
+#   define sws_isSupportedOutput(x) 0
+#endif
+
+    while ((pix_desc = av_pix_fmt_desc_next(pix_desc))) {
+        enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(pix_desc);
+        printf("%c%c%c%c%c %-16s       %d            %2d\n",
+               sws_isSupportedInput (pix_fmt)              ? 'I' : '.',
+               sws_isSupportedOutput(pix_fmt)              ? 'O' : '.',
+               pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL   ? 'H' : '.',
+               pix_desc->flags & AV_PIX_FMT_FLAG_PAL       ? 'P' : '.',
+               pix_desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ? 'B' : '.',
+               pix_desc->name,
+               pix_desc->nb_components,
+               av_get_bits_per_pixel(pix_desc));
+    }
+    return 0;
+}
+
+int show_sample_fmts(void *optctx, const char *opt, const char *arg)
+{
+    int i;
+    char fmt_str[128];
+    for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
+        printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
+    return 0;
+}
+
+static void show_help_codec(const char *name, int encoder)
+{
+    const AVCodecDescriptor *desc;
+    const AVCodec *codec;
+
+    if (!name) {
+        av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
+        return;
+    }
+
+    codec = encoder ? avcodec_find_encoder_by_name(name) :
+                      avcodec_find_decoder_by_name(name);
+
+    if (codec)
+        print_codec(codec);
+    else if ((desc = avcodec_descriptor_get_by_name(name))) {
+        int printed = 0;
+
+        while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
+            printed = 1;
+            print_codec(codec);
+        }
+
+        if (!printed) {
+            av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to Libav, "
+                   "but no %s for it are available. Libav might need to be "
+                   "recompiled with additional external libraries.\n",
+                   name, encoder ? "encoders" : "decoders");
+        }
+    } else {
+        av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by Libav.\n",
+               name);
+    }
+}
+
+static void show_help_demuxer(const char *name)
+{
+    const AVInputFormat *fmt = av_find_input_format(name);
+
+    if (!fmt) {
+        av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
+        return;
+    }
+
+    printf("Demuxer %s [%s]:\n", fmt->name, fmt->long_name);
+
+    if (fmt->extensions)
+        printf("    Common extensions: %s.\n", fmt->extensions);
+
+    if (fmt->priv_class)
+        show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
+}
+
+static void show_help_muxer(const char *name)
+{
+    const AVCodecDescriptor *desc;
+    const AVOutputFormat *fmt = av_guess_format(name, NULL, NULL);
+
+    if (!fmt) {
+        av_log(NULL, AV_LOG_ERROR, "Unknown format '%s'.\n", name);
+        return;
+    }
+
+    printf("Muxer %s [%s]:\n", fmt->name, fmt->long_name);
+
+    if (fmt->extensions)
+        printf("    Common extensions: %s.\n", fmt->extensions);
+    if (fmt->mime_type)
+        printf("    Mime type: %s.\n", fmt->mime_type);
+    if (fmt->video_codec != AV_CODEC_ID_NONE &&
+        (desc = avcodec_descriptor_get(fmt->video_codec))) {
+        printf("    Default video codec: %s.\n", desc->name);
+    }
+    if (fmt->audio_codec != AV_CODEC_ID_NONE &&
+        (desc = avcodec_descriptor_get(fmt->audio_codec))) {
+        printf("    Default audio codec: %s.\n", desc->name);
+    }
+    if (fmt->subtitle_codec != AV_CODEC_ID_NONE &&
+        (desc = avcodec_descriptor_get(fmt->subtitle_codec))) {
+        printf("    Default subtitle codec: %s.\n", desc->name);
+    }
+
+    if (fmt->priv_class)
+        show_help_children(fmt->priv_class, AV_OPT_FLAG_ENCODING_PARAM);
+}
+
+#if CONFIG_AVFILTER
+static void show_help_filter(const char *name)
+{
+    const AVFilter *f = avfilter_get_by_name(name);
+    int i, count;
+
+    if (!name) {
+        av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
+        return;
+    } else if (!f) {
+        av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
+        return;
+    }
+
+    printf("Filter %s [%s]:\n", f->name, f->description);
+
+    if (f->flags & AVFILTER_FLAG_SLICE_THREADS)
+        printf("    slice threading supported\n");
+
+    printf("    Inputs:\n");
+    count = avfilter_pad_count(f->inputs);
+    for (i = 0; i < count; i++) {
+        printf("        %d %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
+               media_type_string(avfilter_pad_get_type(f->inputs, i)));
+    }
+    if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
+        printf("        dynamic (depending on the options)\n");
+
+    printf("    Outputs:\n");
+    count = avfilter_pad_count(f->outputs);
+    for (i = 0; i < count; i++) {
+        printf("        %d %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
+               media_type_string(avfilter_pad_get_type(f->outputs, i)));
+    }
+    if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
+        printf("        dynamic (depending on the options)\n");
+
+    if (f->priv_class)
+        show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM |
+                                          AV_OPT_FLAG_AUDIO_PARAM);
+}
+#endif
+
+int show_help(void *optctx, const char *opt, const char *arg)
+{
+    char *topic, *par;
+    av_log_set_callback(log_callback_help);
+
+    topic = av_strdup(arg ? arg : "");
+    if (!topic)
+        return AVERROR(ENOMEM);
+    par = strchr(topic, '=');
+    if (par)
+        *par++ = 0;
+
+    if (!*topic) {
+        show_help_default(topic, par);
+    } else if (!strcmp(topic, "decoder")) {
+        show_help_codec(par, 0);
+    } else if (!strcmp(topic, "encoder")) {
+        show_help_codec(par, 1);
+    } else if (!strcmp(topic, "demuxer")) {
+        show_help_demuxer(par);
+    } else if (!strcmp(topic, "muxer")) {
+        show_help_muxer(par);
+#if CONFIG_AVFILTER
+    } else if (!strcmp(topic, "filter")) {
+        show_help_filter(par);
+#endif
+    } else {
+        show_help_default(topic, par);
+    }
+
+    av_freep(&topic);
+    return 0;
+}
+
+int read_yesno(void)
+{
+    int c = getchar();
+    int yesno = (av_toupper(c) == 'Y');
+
+    while (c != '\n' && c != EOF)
+        c = getchar();
+
+    return yesno;
+}
+
+void init_pts_correction(PtsCorrectionContext *ctx)
+{
+    ctx->num_faulty_pts = ctx->num_faulty_dts = 0;
+    ctx->last_pts = ctx->last_dts = INT64_MIN;
+}
+
+int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t reordered_pts,
+                          int64_t dts)
+{
+    int64_t pts = AV_NOPTS_VALUE;
+
+    if (dts != AV_NOPTS_VALUE) {
+        ctx->num_faulty_dts += dts <= ctx->last_dts;
+        ctx->last_dts = dts;
+    }
+    if (reordered_pts != AV_NOPTS_VALUE) {
+        ctx->num_faulty_pts += reordered_pts <= ctx->last_pts;
+        ctx->last_pts = reordered_pts;
+    }
+    if ((ctx->num_faulty_pts<=ctx->num_faulty_dts || dts == AV_NOPTS_VALUE)
+        && reordered_pts != AV_NOPTS_VALUE)
+        pts = reordered_pts;
+    else
+        pts = dts;
+
+    return pts;
+}
+
+FILE *get_preset_file(char *filename, size_t filename_size,
+                      const char *preset_name, int is_path,
+                      const char *codec_name)
+{
+    FILE *f = NULL;
+    int i;
+    const char *base[3] = { getenv("AVCONV_DATADIR"),
+                            getenv("HOME"),
+                            AVCONV_DATADIR, };
+
+    if (is_path) {
+        av_strlcpy(filename, preset_name, filename_size);
+        f = fopen(filename, "r");
+    } else {
+        for (i = 0; i < 3 && !f; i++) {
+            if (!base[i])
+                continue;
+            snprintf(filename, filename_size, "%s%s/%s.avpreset", base[i],
+                     i != 1 ? "" : "/.avconv", preset_name);
+            f = fopen(filename, "r");
+            if (!f && codec_name) {
+                snprintf(filename, filename_size,
+                         "%s%s/%s-%s.avpreset",
+                         base[i], i != 1 ? "" : "/.avconv", codec_name,
+                         preset_name);
+                f = fopen(filename, "r");
+            }
+        }
+    }
+
+    return f;
+}
+
+int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
+{
+    if (*spec <= '9' && *spec >= '0') /* opt:index */
+        return strtol(spec, NULL, 0) == st->index;
+    else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
+             *spec == 't') { /* opt:[vasdt] */
+        enum AVMediaType type;
+
+        switch (*spec++) {
+        case 'v': type = AVMEDIA_TYPE_VIDEO;      break;
+        case 'a': type = AVMEDIA_TYPE_AUDIO;      break;
+        case 's': type = AVMEDIA_TYPE_SUBTITLE;   break;
+        case 'd': type = AVMEDIA_TYPE_DATA;       break;
+        case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
+        default:  av_assert0(0);
+        }
+        if (type != st->codecpar->codec_type)
+            return 0;
+        if (*spec++ == ':') { /* possibly followed by :index */
+            int i, index = strtol(spec, NULL, 0);
+            for (i = 0; i < s->nb_streams; i++)
+                if (s->streams[i]->codecpar->codec_type == type && index-- == 0)
+                   return i == st->index;
+            return 0;
+        }
+        return 1;
+    } else if (*spec == 'p' && *(spec + 1) == ':') {
+        int prog_id, i, j;
+        char *endptr;
+        spec += 2;
+        prog_id = strtol(spec, &endptr, 0);
+        for (i = 0; i < s->nb_programs; i++) {
+            if (s->programs[i]->id != prog_id)
+                continue;
+
+            if (*endptr++ == ':') {
+                int stream_idx = strtol(endptr, NULL, 0);
+                return stream_idx >= 0 &&
+                    stream_idx < s->programs[i]->nb_stream_indexes &&
+                    st->index == s->programs[i]->stream_index[stream_idx];
+            }
+
+            for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
+                if (st->index == s->programs[i]->stream_index[j])
+                    return 1;
+        }
+        return 0;
+    } else if (*spec == 'i' && *(spec + 1) == ':') {
+        int stream_id;
+        char *endptr;
+        spec += 2;
+        stream_id = strtol(spec, &endptr, 0);
+        return stream_id == st->id;
+    } else if (*spec == 'm' && *(spec + 1) == ':') {
+        AVDictionaryEntry *tag;
+        char *key, *val;
+        int ret;
+
+        spec += 2;
+        val = strchr(spec, ':');
+
+        key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
+        if (!key)
+            return AVERROR(ENOMEM);
+
+        tag = av_dict_get(st->metadata, key, NULL, 0);
+        if (tag) {
+            if (!val || !strcmp(tag->value, val + 1))
+                ret = 1;
+            else
+                ret = 0;
+        } else
+            ret = 0;
+
+        av_freep(&key);
+        return ret;
+    } else if (*spec == 'u') {
+        AVCodecParameters *par = st->codecpar;
+        int val;
+        switch (par->codec_type) {
+        case AVMEDIA_TYPE_AUDIO:
+            val = par->sample_rate && par->channels;
+            if (par->format == AV_SAMPLE_FMT_NONE)
+                return 0;
+            break;
+        case AVMEDIA_TYPE_VIDEO:
+            val = par->width && par->height;
+            if (par->format == AV_PIX_FMT_NONE)
+                return 0;
+            break;
+        case AVMEDIA_TYPE_UNKNOWN:
+            val = 0;
+            break;
+        default:
+            val = 1;
+            break;
+        }
+        return par->codec_id != AV_CODEC_ID_NONE && val != 0;
+    } else if (!*spec) /* empty specifier, matches everything */
+        return 1;
+
+    av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
+    return AVERROR(EINVAL);
+}
+
+AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
+                                AVFormatContext *s, AVStream *st, AVCodec *codec)
+{
+    AVDictionary    *ret = NULL;
+    AVDictionaryEntry *t = NULL;
+    int            flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM
+                                      : AV_OPT_FLAG_DECODING_PARAM;
+    char          prefix = 0;
+    const AVClass    *cc = avcodec_get_class();
+
+    if (!codec)
+        codec            = s->oformat ? avcodec_find_encoder(codec_id)
+                                      : avcodec_find_decoder(codec_id);
+
+    switch (st->codecpar->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+        prefix  = 'v';
+        flags  |= AV_OPT_FLAG_VIDEO_PARAM;
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        prefix  = 'a';
+        flags  |= AV_OPT_FLAG_AUDIO_PARAM;
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        prefix  = 's';
+        flags  |= AV_OPT_FLAG_SUBTITLE_PARAM;
+        break;
+    }
+
+    while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
+        char *p = strchr(t->key, ':');
+
+        /* check stream specification in opt name */
+        if (p)
+            switch (check_stream_specifier(s, st, p + 1)) {
+            case  1: *p = 0; break;
+            case  0:         continue;
+            default:         return NULL;
+            }
+
+        if (av_opt_find(&cc, t->key, NULL, flags, AV_OPT_SEARCH_FAKE_OBJ) ||
+            (codec && codec->priv_class &&
+             av_opt_find(&codec->priv_class, t->key, NULL, flags,
+                         AV_OPT_SEARCH_FAKE_OBJ)))
+            av_dict_set(&ret, t->key, t->value, 0);
+        else if (t->key[0] == prefix &&
+                 av_opt_find(&cc, t->key + 1, NULL, flags,
+                             AV_OPT_SEARCH_FAKE_OBJ))
+            av_dict_set(&ret, t->key + 1, t->value, 0);
+
+        if (p)
+            *p = ':';
+    }
+    return ret;
+}
+
+AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
+                                           AVDictionary *codec_opts)
+{
+    int i;
+    AVDictionary **opts;
+
+    if (!s->nb_streams)
+        return NULL;
+    opts = av_mallocz(s->nb_streams * sizeof(*opts));
+    if (!opts) {
+        av_log(NULL, AV_LOG_ERROR,
+               "Could not alloc memory for stream options.\n");
+        return NULL;
+    }
+    for (i = 0; i < s->nb_streams; i++)
+        opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codecpar->codec_id,
+                                    s, s->streams[i], NULL);
+    return opts;
+}
+
+void *grow_array(void *array, int elem_size, int *size, int new_size)
+{
+    if (new_size >= INT_MAX / elem_size) {
+        av_log(NULL, AV_LOG_ERROR, "Array too big.\n");
+        exit_program(1);
+    }
+    if (*size < new_size) {
+        uint8_t *tmp = av_realloc(array, new_size*elem_size);
+        if (!tmp) {
+            av_log(NULL, AV_LOG_ERROR, "Could not alloc buffer.\n");
+            exit_program(1);
+        }
+        memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
+        *size = new_size;
+        return tmp;
+    }
+    return array;
+}
+
+const char *media_type_string(enum AVMediaType media_type)
+{
+    switch (media_type) {
+    case AVMEDIA_TYPE_VIDEO:      return "video";
+    case AVMEDIA_TYPE_AUDIO:      return "audio";
+    case AVMEDIA_TYPE_DATA:       return "data";
+    case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
+    case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
+    default:                      return "unknown";
+    }
+}
diff --git a/avtools/cmdutils.h b/avtools/cmdutils.h
new file mode 100644
index 0000000000..cc78ac5911
--- /dev/null
+++ b/avtools/cmdutils.h
@@ -0,0 +1,566 @@
+/*
+ * Various utilities for command line tools
+ * copyright (c) 2003 Fabrice Bellard
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LIBAV_CMDUTILS_H
+#define LIBAV_CMDUTILS_H
+
+#include <stdint.h>
+
+#include "libavcodec/avcodec.h"
+#include "libavfilter/avfilter.h"
+#include "libavformat/avformat.h"
+#include "libswscale/swscale.h"
+
+/**
+ * program name, defined by the program for show_version().
+ */
+extern const char program_name[];
+
+/**
+ * program birth year, defined by the program for show_banner()
+ */
+extern const int program_birth_year;
+
+extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
+extern AVFormatContext *avformat_opts;
+extern struct SwsContext *sws_opts;
+extern AVDictionary *format_opts, *codec_opts, *resample_opts;
+
+/**
+ * Register a program-specific cleanup routine.
+ */
+void register_exit(void (*cb)(int ret));
+
+/**
+ * Wraps exit with a program-specific cleanup routine.
+ */
+void exit_program(int ret) av_noreturn;
+
+/**
+ * Initialize the cmdutils option system, in particular
+ * allocate the *_opts contexts.
+ */
+void init_opts(void);
+/**
+ * Uninitialize the cmdutils option system, in particular
+ * free the *_opts contexts and their contents.
+ */
+void uninit_opts(void);
+
+/**
+ * Trivial log callback.
+ * Only suitable for show_help and similar since it lacks prefix handling.
+ */
+void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);
+
+/**
+ * Override the cpuflags mask.
+ */
+int opt_cpuflags(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Fallback for options that are not explicitly handled, these will be
+ * parsed through AVOptions.
+ */
+int opt_default(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Set the libav* libraries log level.
+ */
+int opt_loglevel(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Limit the execution time.
+ */
+int opt_timelimit(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Parse a string and return its corresponding value as a double.
+ * Exit from the application if the string cannot be correctly
+ * parsed or the corresponding value is invalid.
+ *
+ * @param context the context of the value to be set (e.g. the
+ * corresponding command line option name)
+ * @param numstr the string to be parsed
+ * @param type the type (OPT_INT64 or OPT_FLOAT) as which the
+ * string should be parsed
+ * @param min the minimum valid accepted value
+ * @param max the maximum valid accepted value
+ */
+double parse_number_or_die(const char *context, const char *numstr, int type,
+                           double min, double max);
+
+/**
+ * Parse a string specifying a time and return its corresponding
+ * value as a number of microseconds. Exit from the application if
+ * the string cannot be correctly parsed.
+ *
+ * @param context the context of the value to be set (e.g. the
+ * corresponding command line option name)
+ * @param timestr the string to be parsed
+ * @param is_duration a flag which tells how to interpret timestr, if
+ * not zero timestr is interpreted as a duration, otherwise as a
+ * date
+ *
+ * @see parse_date()
+ */
+int64_t parse_time_or_die(const char *context, const char *timestr,
+                          int is_duration);
+
+typedef struct SpecifierOpt {
+    char *specifier;    /**< stream/chapter/program/... specifier */
+    union {
+        uint8_t *str;
+        int        i;
+        int64_t  i64;
+        float      f;
+        double   dbl;
+    } u;
+} SpecifierOpt;
+
+typedef struct OptionDef {
+    const char *name;
+    int flags;
+#define HAS_ARG    0x0001
+#define OPT_BOOL   0x0002
+#define OPT_EXPERT 0x0004
+#define OPT_STRING 0x0008
+#define OPT_VIDEO  0x0010
+#define OPT_AUDIO  0x0020
+#define OPT_INT    0x0080
+#define OPT_FLOAT  0x0100
+#define OPT_SUBTITLE 0x0200
+#define OPT_INT64  0x0400
+#define OPT_EXIT   0x0800
+#define OPT_DATA   0x1000
+#define OPT_PERFILE  0x2000     /* the option is per-file (currently avconv-only).
+                                   implied by OPT_OFFSET or OPT_SPEC */
+#define OPT_OFFSET 0x4000       /* option is specified as an offset in a passed optctx */
+#define OPT_SPEC   0x8000       /* option is to be stored in an array of SpecifierOpt.
+                                   Implies OPT_OFFSET. Next element after the offset is
+                                   an int containing element count in the array. */
+#define OPT_TIME  0x10000
+#define OPT_DOUBLE 0x20000
+#define OPT_INPUT  0x40000
+#define OPT_OUTPUT 0x80000
+     union {
+        void *dst_ptr;
+        int (*func_arg)(void *, const char *, const char *);
+        size_t off;
+    } u;
+    const char *help;
+    const char *argname;
+} OptionDef;
+
+/**
+ * Print help for all options matching specified flags.
+ *
+ * @param options a list of options
+ * @param msg title of this group. Only printed if at least one option matches.
+ * @param req_flags print only options which have all those flags set.
+ * @param rej_flags don't print options which have any of those flags set.
+ * @param alt_flags print only options that have at least one of those flags set
+ */
+void show_help_options(const OptionDef *options, const char *msg, int req_flags,
+                       int rej_flags, int alt_flags);
+
+#define CMDUTILS_COMMON_OPTIONS                                                                                         \
+    { "L",           OPT_EXIT,             { .func_arg = show_license },     "show license" },                          \
+    { "h",           OPT_EXIT,             { .func_arg = show_help },        "show help", "topic" },                    \
+    { "?",           OPT_EXIT,             { .func_arg = show_help },        "show help", "topic" },                    \
+    { "help",        OPT_EXIT,             { .func_arg = show_help },        "show help", "topic" },                    \
+    { "-help",       OPT_EXIT,             { .func_arg = show_help },        "show help", "topic" },                    \
+    { "version",     OPT_EXIT,             { .func_arg = show_version },     "show version" },                          \
+    { "formats",     OPT_EXIT,             { .func_arg = show_formats },     "show available formats" },                \
+    { "codecs",      OPT_EXIT,             { .func_arg = show_codecs },      "show available codecs" },                 \
+    { "decoders",    OPT_EXIT,             { .func_arg = show_decoders },    "show available decoders" },               \
+    { "encoders",    OPT_EXIT,             { .func_arg = show_encoders },    "show available encoders" },               \
+    { "bsfs",        OPT_EXIT,             { .func_arg = show_bsfs },        "show available bit stream filters" },     \
+    { "protocols",   OPT_EXIT,             { .func_arg = show_protocols },   "show available protocols" },              \
+    { "filters",     OPT_EXIT,             { .func_arg = show_filters },     "show available filters" },                \
+    { "pix_fmts",    OPT_EXIT,             { .func_arg = show_pix_fmts },    "show available pixel formats" },          \
+    { "sample_fmts", OPT_EXIT,             { .func_arg = show_sample_fmts }, "show available audio sample formats" },   \
+    { "loglevel",    HAS_ARG,              { .func_arg = opt_loglevel },     "set libav* logging level", "loglevel" },  \
+    { "v",           HAS_ARG,              { .func_arg = opt_loglevel },     "set libav* logging level", "loglevel" },  \
+    { "cpuflags",    HAS_ARG | OPT_EXPERT, { .func_arg = opt_cpuflags },     "set CPU flags mask", "mask" },            \
+
+/**
+ * Show help for all options with given flags in class and all its
+ * children.
+ */
+void show_help_children(const AVClass *class, int flags);
+
+/**
+ * Per-avtool specific help handler. Implemented in each
+ * avtool, called by show_help().
+ */
+void show_help_default(const char *opt, const char *arg);
+
+/**
+ * Generic -h handler common to all avtools.
+ */
+int show_help(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Parse the command line arguments.
+ *
+ * @param optctx an opaque options context
+ * @param argc   number of command line arguments
+ * @param argv   values of command line arguments
+ * @param options Array with the definitions required to interpret every
+ * option of the form: -option_name [argument]
+ * @param parse_arg_function Name of the function called to process every
+ * argument without a leading option name flag. NULL if such arguments do
+ * not have to be processed.
+ */
+void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
+                   void (* parse_arg_function)(void *optctx, const char*));
+
+/**
+ * Parse one given option.
+ *
+ * @return on success 1 if arg was consumed, 0 otherwise; negative number on error
+ */
+int parse_option(void *optctx, const char *opt, const char *arg,
+                 const OptionDef *options);
+
+/**
+ * An option extracted from the commandline.
+ * Cannot use AVDictionary because of options like -map which can be
+ * used multiple times.
+ */
+typedef struct Option {
+    const OptionDef  *opt;
+    const char       *key;
+    const char       *val;
+} Option;
+
+typedef struct OptionGroupDef {
+    /**< group name */
+    const char *name;
+    /**
+     * Option to be used as group separator. Can be NULL for groups which
+     * are terminated by a non-option argument (e.g. avconv output files)
+     */
+    const char *sep;
+    /**
+     * Option flags that must be set on each option that is
+     * applied to this group
+     */
+    int flags;
+} OptionGroupDef;
+
+typedef struct OptionGroup {
+    const OptionGroupDef *group_def;
+    const char *arg;
+
+    Option *opts;
+    int  nb_opts;
+
+    AVDictionary *codec_opts;
+    AVDictionary *format_opts;
+    AVDictionary *resample_opts;
+    struct SwsContext *sws_opts;
+} OptionGroup;
+
+/**
+ * A list of option groups that all have the same group type
+ * (e.g. input files or output files)
+ */
+typedef struct OptionGroupList {
+    const OptionGroupDef *group_def;
+
+    OptionGroup *groups;
+    int       nb_groups;
+} OptionGroupList;
+
+typedef struct OptionParseContext {
+    OptionGroup global_opts;
+
+    OptionGroupList *groups;
+    int           nb_groups;
+
+    /* parsing state */
+    OptionGroup cur_group;
+} OptionParseContext;
+
+/**
+ * Parse an options group and write results into optctx.
+ *
+ * @param optctx an app-specific options context. NULL for global options group
+ */
+int parse_optgroup(void *optctx, OptionGroup *g);
+
+/**
+ * Split the commandline into an intermediate form convenient for further
+ * processing.
+ *
+ * The commandline is assumed to be composed of options which either belong to a
+ * group (those with OPT_SPEC, OPT_OFFSET or OPT_PERFILE) or are global
+ * (everything else).
+ *
+ * A group (defined by an OptionGroupDef struct) is a sequence of options
+ * terminated by either a group separator option (e.g. -i) or a parameter that
+ * is not an option (doesn't start with -). A group without a separator option
+ * must always be first in the supplied groups list.
+ *
+ * All options within the same group are stored in one OptionGroup struct in an
+ * OptionGroupList, all groups with the same group definition are stored in one
+ * OptionGroupList in OptionParseContext.groups. The order of group lists is the
+ * same as the order of group definitions.
+ */
+int split_commandline(OptionParseContext *octx, int argc, char *argv[],
+                      const OptionDef *options,
+                      const OptionGroupDef *groups, int nb_groups);
+
+/**
+ * Free all allocated memory in an OptionParseContext.
+ */
+void uninit_parse_context(OptionParseContext *octx);
+
+/**
+ * Find the '-loglevel' option in the command line args and apply it.
+ */
+void parse_loglevel(int argc, char **argv, const OptionDef *options);
+
+/**
+ * Return index of option opt in argv or 0 if not found.
+ */
+int locate_option(int argc, char **argv, const OptionDef *options,
+                  const char *optname);
+
+/**
+ * Check if the given stream matches a stream specifier.
+ *
+ * @param s  Corresponding format context.
+ * @param st Stream from s to be checked.
+ * @param spec A stream specifier of the [v|a|s|d]:[\<stream index\>] form.
+ *
+ * @return 1 if the stream matches, 0 if it doesn't, <0 on error
+ */
+int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec);
+
+/**
+ * Filter out options for given codec.
+ *
+ * Create a new options dictionary containing only the options from
+ * opts which apply to the codec with ID codec_id.
+ *
+ * @param opts     dictionary to place options in
+ * @param codec_id ID of the codec that should be filtered for
+ * @param s Corresponding format context.
+ * @param st A stream from s for which the options should be filtered.
+ * @param codec The particular codec for which the options should be filtered.
+ *              If null, the default one is looked up according to the codec id.
+ * @return a pointer to the created dictionary
+ */
+AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id,
+                                AVFormatContext *s, AVStream *st, AVCodec *codec);
+
+/**
+ * Setup AVCodecContext options for avformat_find_stream_info().
+ *
+ * Create an array of dictionaries, one dictionary for each stream
+ * contained in s.
+ * Each dictionary will contain the options from codec_opts which can
+ * be applied to the corresponding stream codec context.
+ *
+ * @return pointer to the created array of dictionaries, NULL if it
+ * cannot be created
+ */
+AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
+                                           AVDictionary *codec_opts);
+
+/**
+ * Print an error message to stderr, indicating filename and a human
+ * readable description of the error code err.
+ *
+ * If strerror_r() is not available the use of this function in a
+ * multithreaded application may be unsafe.
+ *
+ * @see av_strerror()
+ */
+void print_error(const char *filename, int err);
+
+/**
+ * Print the program banner to stderr. The banner contents depend on the
+ * current version of the repository and of the libav* libraries used by
+ * the program.
+ */
+void show_banner(void);
+
+/**
+ * Print the version of the program to stdout. The version message
+ * depends on the current versions of the repository and of the libav*
+ * libraries.
+ */
+int show_version(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print the license of the program to stdout. The license depends on
+ * the license of the libraries compiled into the program.
+ */
+int show_license(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the formats supported by the
+ * program.
+ */
+int show_formats(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the codecs supported by the
+ * program.
+ */
+int show_codecs(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the decoders supported by the
+ * program.
+ */
+int show_decoders(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the encoders supported by the
+ * program.
+ */
+int show_encoders(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the filters supported by the
+ * program.
+ */
+int show_filters(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the bit stream filters supported by the
+ * program.
+ */
+int show_bsfs(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the protocols supported by the
+ * program.
+ */
+int show_protocols(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the pixel formats supported by the
+ * program.
+ */
+int show_pix_fmts(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Print a listing containing all the sample formats supported by the
+ * program.
+ */
+int show_sample_fmts(void *optctx, const char *opt, const char *arg);
+
+/**
+ * Return a positive value if a line read from standard input
+ * starts with [yY], otherwise return 0.
+ */
+int read_yesno(void);
+
+typedef struct PtsCorrectionContext {
+    int64_t num_faulty_pts; /// Number of incorrect PTS values so far
+    int64_t num_faulty_dts; /// Number of incorrect DTS values so far
+    int64_t last_pts;       /// PTS of the last frame
+    int64_t last_dts;       /// DTS of the last frame
+} PtsCorrectionContext;
+
+/**
+ * Reset the state of the PtsCorrectionContext.
+ */
+void init_pts_correction(PtsCorrectionContext *ctx);
+
+/**
+ * Attempt to guess proper monotonic timestamps for decoded video frames
+ * which might have incorrect times. Input timestamps may wrap around, in
+ * which case the output will as well.
+ *
+ * @param ctx the PtsCorrectionContext carrying stream pts information
+ * @param pts the pts field of the decoded AVPacket, as passed through
+ * AVCodecContext.reordered_opaque
+ * @param dts the dts field of the decoded AVPacket
+ * @return one of the input values, may be AV_NOPTS_VALUE
+ */
+int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t pts, int64_t dts);
+
+/**
+ * Get a file corresponding to a preset file.
+ *
+ * If is_path is non-zero, look for the file in the path preset_name.
+ * Otherwise search for a file named arg.avpreset in the directories
+ * $AVCONV_DATADIR (if set), $HOME/.avconv, and in the datadir defined
+ * at configuration time, in that order. If no such file is found and
+ * codec_name is defined, then search for a file named
+ * codec_name-preset_name.avpreset in the above-mentioned directories.
+ *
+ * @param filename buffer where the name of the found filename is written
+ * @param filename_size size in bytes of the filename buffer
+ * @param preset_name name of the preset to search
+ * @param is_path tell if preset_name is a filename path
+ * @param codec_name name of the codec for which to look for the
+ * preset, may be NULL
+ */
+FILE *get_preset_file(char *filename, size_t filename_size,
+                      const char *preset_name, int is_path, const char *codec_name);
+
+/**
+ * Realloc array to hold new_size elements of elem_size.
+ * Calls exit() on failure.
+ *
+ * @param array array to reallocate
+ * @param elem_size size in bytes of each element
+ * @param size new element count will be written here
+ * @param new_size number of elements to place in reallocated array
+ * @return reallocated array
+ */
+void *grow_array(void *array, int elem_size, int *size, int new_size);
+
+/**
+ * Get a string describing a media type.
+ */
+const char *media_type_string(enum AVMediaType media_type);
+
+#define GROW_ARRAY(array, nb_elems)\
+    array = grow_array(array, sizeof(*array), &nb_elems, nb_elems + 1)
+
+#define GET_PIX_FMT_NAME(pix_fmt)\
+    const char *name = av_get_pix_fmt_name(pix_fmt);
+
+#define GET_SAMPLE_FMT_NAME(sample_fmt)\
+    const char *name = av_get_sample_fmt_name(sample_fmt)
+
+#define GET_SAMPLE_RATE_NAME(rate)\
+    char name[16];\
+    snprintf(name, sizeof(name), "%d", rate);
+
+#define GET_CH_LAYOUT_NAME(ch_layout)\
+    char name[16];\
+    snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
+
+#define GET_CH_LAYOUT_DESC(ch_layout)\
+    char name[128];\
+    av_get_channel_layout_string(name, sizeof(name), 0, ch_layout);
+
+#endif /* LIBAV_CMDUTILS_H */