[FFmpeg-cvslog] mov: compute avg_frame_rate only if duration is known

[Janne Grunau]

ffmpeg | branch: master | Janne Grunau <janne-libav at jannau.net> | Fri Nov 23 16:33:36 2012 +0100| [80b6b31417c6791f9d4f1bc8c3c2a726d71e45e0] | committer: Janne Grunau

mov: compute avg_frame_rate only if duration is known

Fixes an assert in fuzzed sample sample.mp4_s265930.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=80b6b31417c6791f9d4f1bc8c3c2a726d71e45e0
---

 libavformat/mov.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index c6ff84b..a0ede86 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))