[FFmpeg-trac] #7282(undetermined:new): ffmpeg generates improper HE-AACv2 fMP4 files

FFmpeg trac at avcodec.org
Tue Jul 24 20:08:16 EEST 2018

#7282: ffmpeg generates improper HE-AACv2 fMP4 files
             Reporter:  ronak2121    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0

Comment (by ronak2121):

 I'm not sure that part is important in this discussion. Have you looked at
 the issues I call out above where the codec information &
 defaultSampleDuration in the fMP4 is not being signaled properly?

 But at any rate, are you sure that the duration from ffmpeg is accurate?
 Have you tried running `ffmpeg -i test2.mp4 -f null`? If so, I'm not sure
 what Apple is doing to the audio there to change the duration by so much.
 If you notice, the start: value there is 9.904218 which maps to the offset
 that you see there. What does that mean in ffmpeg?

Ticket URL: <https://trac.ffmpeg.org/ticket/7282#comment:13>
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