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lavf: use avg_frame_rate and packet number to exit find_stream_info 

qatar does this too but clobbers the AVPacket.duration by approximate
values.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-01-05 00:49:02 +01:00
parent 1171d938af
commit ad8e3304f7
1 changed files with 7 additions and 2 deletions
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9
libavformat/utils.c
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@ -2510,8 +2510,13 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
st = ic->streams[pkt->stream_index];
if (st->codec_info_nb_frames>1) {
int64_t t;
if (st->time_base.den > 0 && (t=av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q)) >= ic->max_analyze_duration) {
int64_t t=0;
if (st->time_base.den > 0)
t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
if (st->avg_frame_rate.num > 0)
t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num}, AV_TIME_BASE_Q));
if (t >= ic->max_analyze_duration) {
av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
break;
}