diff options
author | Clément Bœsch <clement@stupeflix.com> | 2016-09-09 16:38:21 +0200 |
---|---|---|
committer | Clément Bœsch <u@pkh.me> | 2016-09-14 09:57:55 +0200 |
commit | ae1dd0c9a61627169b9464ba56d3fea7ba19d4a1 (patch) | |
tree | 9396f19aff845bb8f401ace0f5adbff98d799e3a /libavformat/utils.c | |
parent | 7f386bbe2a7976e39475360800c54c7484ac2719 (diff) |
lavf: add avformat_transfer_internal_stream_timing_info() and use it in ffmpeg
In lavf we have access to st->internal->avctx so it's a better place
than in ffmpeg*.c and will allow moving to codecpar.
Diffstat (limited to 'libavformat/utils.c')
-rw-r--r-- | libavformat/utils.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c index 76cbff4ef6..f4a836d80d 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -5281,3 +5281,67 @@ int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf par->extradata_size = buf->len; return 0; } + +int avformat_transfer_internal_stream_timing_info(const AVOutputFormat *ofmt, + AVStream *ost, const AVStream *ist, + enum AVTimebaseSource copy_tb) +{ + //TODO: use [io]st->internal->avctx + const AVCodecContext *dec_ctx = ist->codec; + AVCodecContext *enc_ctx = ost->codec; + + enc_ctx->time_base = ist->time_base; + /* + * Avi is a special case here because it supports variable fps but + * having the fps and timebase differe significantly adds quite some + * overhead + */ + if (!strcmp(ofmt->name, "avi")) { +#if FF_API_R_FRAME_RATE + if (copy_tb == AVFMT_TBCF_AUTO && ist->r_frame_rate.num + && av_q2d(ist->r_frame_rate) >= av_q2d(ist->avg_frame_rate) + && 0.5/av_q2d(ist->r_frame_rate) > av_q2d(ist->time_base) + && 0.5/av_q2d(ist->r_frame_rate) > av_q2d(dec_ctx->time_base) + && av_q2d(ist->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500 + || copy_tb == AVFMT_TBCF_R_FRAMERATE) { + enc_ctx->time_base.num = ist->r_frame_rate.den; + enc_ctx->time_base.den = 2*ist->r_frame_rate.num; + enc_ctx->ticks_per_frame = 2; + } else +#endif + if (copy_tb == AVFMT_TBCF_AUTO && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->time_base) + && av_q2d(ist->time_base) < 1.0/500 + || copy_tb == AVFMT_TBCF_DECODER) { + enc_ctx->time_base = dec_ctx->time_base; + enc_ctx->time_base.num *= dec_ctx->ticks_per_frame; + enc_ctx->time_base.den *= 2; + enc_ctx->ticks_per_frame = 2; + } + } else if (!(ofmt->flags & AVFMT_VARIABLE_FPS) + && strcmp(ofmt->name, "mov") && strcmp(ofmt->name, "mp4") && strcmp(ofmt->name, "3gp") + && strcmp(ofmt->name, "3g2") && strcmp(ofmt->name, "psp") && strcmp(ofmt->name, "ipod") + && strcmp(ofmt->name, "f4v")) { + if (copy_tb == AVFMT_TBCF_AUTO && dec_ctx->time_base.den + && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->time_base) + && av_q2d(ist->time_base) < 1.0/500 + || copy_tb == AVFMT_TBCF_DECODER) { + enc_ctx->time_base = dec_ctx->time_base; + enc_ctx->time_base.num *= dec_ctx->ticks_per_frame; + } + } + + if (enc_ctx->codec_tag == AV_RL32("tmcd") + && dec_ctx->time_base.num < dec_ctx->time_base.den + && dec_ctx->time_base.num > 0 + && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) { + enc_ctx->time_base = dec_ctx->time_base; + } + + if (ost->avg_frame_rate.num) + enc_ctx->time_base = av_inv_q(ost->avg_frame_rate); + + av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den, + enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX); + + return 0; +} |