[FFmpeg-trac] #7869(avformat:open): Can't open an m4a file

[FFmpeg]

#7869: Can't open an m4a file
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             Reporter:  luni-4      |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  important   |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  aac         |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
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Changes (by jamrial):

 * status:  new => open
 * reproduced:  0 => 1
 * component:  ffmpeg => avformat
 * priority:  normal => important
 * keywords:  adts,m4a,aac => aac
 * analyzed:  0 => 1


Comment:

 Looks like a regression since e023334661e6eafcf638ffc2a780fd495fc25ec9

 The file is not an m4a, it's a raw adts aac file, but libavformat figured
 that on its own just fine.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7869#comment:1>
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