diff options
| -rw-r--r-- | libmpdemux/demux_lavf.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/libmpdemux/demux_lavf.c b/libmpdemux/demux_lavf.c index f8311e215c..62cb0bad1b 100644 --- a/libmpdemux/demux_lavf.c +++ b/libmpdemux/demux_lavf.c @@ -417,8 +417,22 @@ static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) sh_video->video.dwRate = codec->time_base.den; sh_video->video.dwScale = codec->time_base.num; } - sh_video->fps = av_q2d(st->r_frame_rate); - sh_video->frametime = 1 / av_q2d(st->r_frame_rate); + /* Try to make up some frame rate value, even if it's not reliable. + * FPS information is needed to support subtitle formats which base + * timing on frame numbers. + * Libavformat seems to report no "reliable" FPS value for AVI files, + * while they are typically constant enough FPS that the value this + * heuristic makes up works with subtitles in practice. + */ + double fps; + if (st->r_frame_rate.num) + fps = av_q2d(st->r_frame_rate); + else + fps = 1.0 / FFMAX(av_q2d(st->time_base), + av_q2d(st->codec->time_base) * + st->codec->ticks_per_frame); + sh_video->fps = fps; + sh_video->frametime = 1 / fps; sh_video->format = bih->biCompression; if (st->sample_aspect_ratio.num) sh_video->aspect = codec->width * st->sample_aspect_ratio.num |