[FFmpeg-trac] #3623(undetermined:reopened): Mixed results writing M4A metadata

[FFmpeg]

#3623: Mixed results writing M4A metadata
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             Reporter:  svnpenn      |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  mov          |               Blocked By:
  metadata                           |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by cehoyos):

 How is this related?
 You originally described that if you pipe the content of file into ffmpeg
 you get different output (that also behaves differently) than the output
 from one (theoretically identical) ffmpeg invocation.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3623#comment:15>
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