1 files changed, 30 insertions, 10 deletions

diff --git a/libavcodec/ratecontrol.c b/libavcodec/ratecontrol.c
index 2cb5eeaefe..8f8647c058 100644
--- a/libavcodec/ratecontrol.c
+++ b/libavcodec/ratecontrol.c
@@ -3,20 +3,20 @@
  *
  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg 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,
+ * FFmpeg 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
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -49,6 +49,10 @@ void ff_write_pass1_stats(MpegEncContext *s){
              s->f_code, s->b_code, s->current_picture.mc_mb_var_sum, s->current_picture.mb_var_sum, s->i_count, s->skip_count, s->header_bits);
 }
 
+static double get_fps(AVCodecContext *avctx){
+    return 1.0 / av_q2d(avctx->time_base) / FFMAX(avctx->ticks_per_frame, 1);
+}
+
 static inline double qp2bits(RateControlEntry *rce, double qp){
     if(qp<=0.0){
         av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n");
@@ -106,6 +110,13 @@ int ff_rate_control_init(MpegEncContext *s)
     };
     emms_c();
 
+    if (!s->avctx->rc_max_available_vbv_use && s->avctx->rc_buffer_size) {
+        if (s->avctx->rc_max_rate) {
+            s->avctx->rc_max_available_vbv_use = av_clipf(s->avctx->rc_max_rate/(s->avctx->rc_buffer_size*get_fps(s->avctx)), 1.0/0.3, 1.0);
+        } else
+            s->avctx->rc_max_available_vbv_use = 1.0;
+    }
+
     res = av_expr_parse(&rcc->rc_eq_eval, s->avctx->rc_eq ? s->avctx->rc_eq : "tex^qComp", const_names, func1_names, func1, NULL, NULL, 0, s->avctx);
     if (res < 0) {
         av_log(s->avctx, AV_LOG_ERROR, "Error parsing rc_eq \"%s\"\n", s->avctx->rc_eq);
@@ -125,6 +136,8 @@ int ff_rate_control_init(MpegEncContext *s)
         rcc->last_qscale_for[i]=FF_QP2LAMBDA * 5;
     }
     rcc->buffer_index= s->avctx->rc_initial_buffer_occupancy;
+    if (!rcc->buffer_index)
+        rcc->buffer_index = s->avctx->rc_buffer_size * 3 / 4;
 
     if(s->flags&CODEC_FLAG_PASS2){
         int i;
@@ -240,7 +253,7 @@ int ff_rate_control_init(MpegEncContext *s)
                 rcc->frame_count[rce.pict_type] ++;
 
                 get_qscale(s, &rce, rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum, i);
-                rcc->pass1_wanted_bits+= s->bit_rate/(1/av_q2d(s->avctx->time_base)); //FIXME misbehaves a little for variable fps
+                rcc->pass1_wanted_bits+= s->bit_rate/get_fps(s->avctx); //FIXME misbehaves a little for variable fps
             }
         }
 
@@ -265,7 +278,7 @@ void ff_rate_control_uninit(MpegEncContext *s)
 
 int ff_vbv_update(MpegEncContext *s, int frame_size){
     RateControlContext *rcc= &s->rc_context;
-    const double fps= 1/av_q2d(s->avctx->time_base);
+    const double fps= get_fps(s->avctx);
     const int buffer_size= s->avctx->rc_buffer_size;
     const double min_rate= s->avctx->rc_min_rate/fps;
     const double max_rate= s->avctx->rc_max_rate/fps;
@@ -435,7 +448,7 @@ static double modify_qscale(MpegEncContext *s, RateControlEntry *rce, double q,
     int qmin, qmax;
     const int pict_type= rce->new_pict_type;
     const double buffer_size= s->avctx->rc_buffer_size;
-    const double fps= 1/av_q2d(s->avctx->time_base);
+    const double fps= get_fps(s->avctx);
     const double min_rate= s->avctx->rc_min_rate / fps;
     const double max_rate= s->avctx->rc_max_rate / fps;
 
@@ -668,11 +681,12 @@ float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)
 
     get_qminmax(&qmin, &qmax, s, pict_type);
 
-    fps= 1/av_q2d(s->avctx->time_base);
+    fps= get_fps(s->avctx);
         /* update predictors */
     if(picture_number>2 && !dry_run){
         const int last_var= s->last_pict_type == AV_PICTURE_TYPE_I ? rcc->last_mb_var_sum : rcc->last_mc_mb_var_sum;
-        update_predictor(&rcc->pred[s->last_pict_type], rcc->last_qscale, sqrt(last_var), s->frame_bits);
+        av_assert1(s->frame_bits >= s->stuffing_bits);
+        update_predictor(&rcc->pred[s->last_pict_type], rcc->last_qscale, sqrt(last_var), s->frame_bits - s->stuffing_bits);
     }
 
     if(s->flags&CODEC_FLAG_PASS2){
@@ -798,7 +812,7 @@ static int init_pass2(MpegEncContext *s)
     RateControlContext *rcc= &s->rc_context;
     AVCodecContext *a= s->avctx;
     int i, toobig;
-    double fps= 1/av_q2d(s->avctx->time_base);
+    double fps= get_fps(s->avctx);
     double complexity[5]={0,0,0,0,0};   // aproximate bits at quant=1
     uint64_t const_bits[5]={0,0,0,0,0}; // quantizer independent bits
     uint64_t all_const_bits;
@@ -849,6 +863,12 @@ static int init_pass2(MpegEncContext *s)
         assert(filter_size%2==1);
 
         /* fixed I/B QP relative to P mode */
+        for(i=FFMAX(0, rcc->num_entries-300); i<rcc->num_entries; i++){
+            RateControlEntry *rce= &rcc->entry[i];
+
+            qscale[i]= get_diff_limited_q(s, rce, qscale[i]);
+        }
+
         for(i=rcc->num_entries-1; i>=0; i--){
             RateControlEntry *rce= &rcc->entry[i];