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-rw-r--r--libavformat/mov.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c
index c6ff84bbcd..a0ede86882 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2052,8 +2052,9 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
((double)st->codec->width * sc->height), INT_MAX);
}
- av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
- sc->time_scale*st->nb_frames, st->duration, INT_MAX);
+ if (st->duration != AV_NOPTS_VALUE)
+ av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
+ sc->time_scale*st->nb_frames, st->duration, INT_MAX);
#if FF_API_R_FRAME_RATE
if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))