[FFmpeg-trac] #6076(avformat:new): concatdec format doesn't allow spaces in file names

[FFmpeg]

#6076: concatdec format doesn't allow spaces in file names
-----------------------------------+--------------------------------------
             Reporter:  MWisBest   |                     Type:  defect
               Status:  new        |                 Priority:  normal
            Component:  avformat   |                  Version:  git-master
             Keywords:  concatdec  |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
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 Summary of the bug:

 The concat(dec) format doesn't allow spaces in file names unless the
 "-safe 0" argument is passed, as it deems spaces to be an "unsafe
 character". The problem is allowing unsafe file names (by passing the
 -safe 0 argument) ''also'' enables support for absolute paths, whereas
 "safe" file names may only be relative paths. Spaces are an everyday
 occurrence in file and folder names and should be allowed by default
 without having to enable support for absolute file paths.


 How to reproduce:
 {{{
 % ffmpeg -f concat -i playlist.txt ... output
 ffmpeg version N-83049-ge71b811 (built on 2017/01/11)
 }}}
 Example "unsafe" playlist.txt:
 {{{
 file 01\ .flac
 file 02.flac
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/6076>
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