[FFmpeg-trac] #5558(undetermined:new): concat protocol should run in "-safe 0" mode by default

FFmpeg trac at avcodec.org
Sun May 15 05:43:49 CEST 2016

#5558: concat protocol should run in "-safe 0" mode by default
             Reporter:  GrayFace     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Summary of the bug:
 It's very hard for me to imagine a task for which "-safe 1" makes sense.
 It probably involves list being obtained from outside source instead of
 being generated. What's for sure is that it's a sophisticated task for
 which figuring out and specifying additional parameters is not a problem.
 For all regular users of "concat" option (me included) the "safe mode"
 brings only troubles, e.g. https://ffmpeg.org/pipermail/ffmpeg-
 No one knows why it's there, because the documentation doesn't say
 anything about rationale: https://www.ffmpeg.org/ffmpeg-
 Obviously, no backward compatibility.

 How to reproduce:
 % ffmpeg -nostats -f concat -i List.txt -c copy output
 (List.txt contains absolute paths)
 ffmpeg version N-79947-gcd244fa
 built on 20160512

Ticket URL: <https://trac.ffmpeg.org/ticket/5558>
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