[FFmpeg-trac] #4998(avformat:new): m4a files created by FFmpeg aren't supported by SanDisk Clip Sport/Jam.

[FFmpeg]

#4998: m4a files created by FFmpeg aren't supported by SanDisk Clip Sport/Jam.
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             Reporter:  bat999       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:  aac mov      |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by stefang):

 FWIW, I have written an ISOBMFF parser in the past and in my opinion the
 optimisation done with fc09bf57 is correct. I looked at after.m4a in a hex
 editor and both the stsc and stco atoms appear to be following the ISO
 14496-12 spec. My guess is on a bug in the device.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4998#comment:23>
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