[FFmpeg-trac] #9277(undetermined:new): ffmpeg concat cannot mix pipe and file input

[FFmpeg]

#9277: ffmpeg concat cannot mix pipe and file input
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             Reporter:  Trevor       |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  concat       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Nicolas George):

 You need to understand that the file names / paths given in the concat
 file are relative to the position of the concat file. That is necessary so
 that {{{ffmpeg -i /tmp/file.concat}}} finds its files, not depending on
 the current working directory. This, of course, applies to all the
 components of the URL or pseudo-URL.

 Since last release, the handling of relative URLs have been fixed, to make
 it compatible with the official recommendations.

 Then, you need to notice that you are confusing {{{file}}}, the keyword of
 the concat script, and {{{file:}}}, the prefix of a pseudo-URL that
 indicates the protocol to use.

 You have put bare file names in your concat script, therefore the files
 are supposed to reside in the same directory (and of course protocol) as
 the script. Which, of course, is not possible for pipe:, but still
 applies.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9277#comment:3>
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