[FFmpeg-trac] #11490(avformat:new): [Regression] Audio silent for long MOV file

[FFmpeg]

#11490: [Regression] Audio silent for long MOV file
------------------------------------+------------------------------------
             Reporter:  cgbug       |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mov         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  1           |
------------------------------------+------------------------------------
Comment (by cgbug):

 This fixes the problem:

 In mov_merge_tts_data() change
 {{{
     if (!sc->sample_count || sc->sample_count >= UINT_MAX /
 sizeof(*sc->tts_data))
         return -1;
 }}}
 to
 {{{
     if (!sc->sample_count || sc->sample_count >= UINT_MAX /
 sizeof(*sc->tts_data) && (ctts || stts))
         return -1;
 }}}

 With pcm audio data, the stsz atom contains a fixed nonzero sample_size
 and empty sample size table. With very long duration the sample_count can
 be so high it triggers the original check when it is not relevant due to
 ctts and stts being 0.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11490#comment:9>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker