[FFmpeg-trac] #7257(undetermined:new): concatenating MP4 files reads all of them twice

[FFmpeg]

#7257: concatenating MP4 files reads all of them twice
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             Reporter:  AyrA         |                    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
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Comment (by AyrA):

 Nope. It still stalls for each media file.

 What did help though was doing {{{ffmpeg.exe -i gopro_file.mp4 -c copy
 output_file.mp4}}} for each individual file and then concatenating these
 files instead. Not sure why but it looks like the GoPro writes media files
 in a way that messes up {{{-f concat}}} but works fine for individual
 files.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7257#comment:6>
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