diff options
Diffstat (limited to 'libavformat/utils.c')
| -rw-r--r-- | libavformat/utils.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c index 6d6c8308ca..79e70f943e 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -2217,12 +2217,20 @@ int av_find_stream_info(AVFormatContext *ic) /* check if one codec still needs to be handled */ for(i=0;i<ic->nb_streams;i++) { + int fps_analyze_framecount = 20; + st = ic->streams[i]; if (!has_codec_parameters(st->codec)) break; + /* if the timebase is coarse (like the usual millisecond precision + of mkv), we need to analyze more frames to reliably arrive at + the correct fps */ + if (av_q2d(st->time_base) > 0.0005) + fps_analyze_framecount *= 2; /* variable fps and no guess at the real fps */ if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num) - && st->info->duration_count<20 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) + && st->info->duration_count < fps_analyze_framecount + && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) break; if(st->parser && st->parser->parser->split && !st->codec->extradata) break; |