[FFmpeg-trac] #5461(avformat:new): concatdec with "-auto_convert 0" fails on mp4

[FFmpeg]

#5461: concatdec with "-auto_convert 0" fails on mp4
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             Reporter:  andrey.utkin  |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  normal        |                Component:  avformat
              Version:  git-master    |               Resolution:
             Keywords:  concat        |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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Comment (by Cigaes):

 Replying to [comment:3 andrey.utkin]:
 > As far as I understand, it should be validly concatenatable if
 "-x264opts stitchable=1" is used. This x264 option serves purpose of
 ensuring that extradata is the same for any video with given fixed encoder
 options.
 [[br]]
 Then I suggest you try using it.

 [[br]]
 > Also, with "-auto_convert 1" I have other errors. But that's different
 issue.
 [[br]]
 Maybe different, but that would be the most relevant one.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5461#comment:4>
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