[FFmpeg-trac] #6142(undetermined:new): concat with safe 0 don't work if another list is included

[FFmpeg]

#6142: concat with safe 0 don't work if another list is included
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             Reporter:  jb_alvarado  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by jb_alvarado):

 Not exactly, I didn't try this before. Since long it is described in the
 ffmpeg wiki page, but I never read it deeper and test it. For me it would
 be a very useful feature, because it makes it possible to edit a concat
 list, before it gets read.

 Just for testing I command line 119 in concatdec.c, and compile ffmpeg.
 After that it would work, but of corse is not the solution. My programming
 skills are not good enough for a proper patch. I also can not see why safe
 0 works in the main list and not in the nested one.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6142#comment:2>
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