[FFmpeg-trac] #5629(avformat:new): Concat format relative path

[FFmpeg]

#5629: Concat format relative path
----------------------------------+----------------------------------
             Reporter:  Mista_D   |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  3.0.2
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 Providing relative path in concat file, fails to read file marking it as
 "Unsafe file name"

 $echo file "../free/test2500.ts" >test.txt


 $ffmpeg -f concat -i t1 -f null -
 ffmpeg version N-80123-gd74cc61 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
   configuration: --enable-static --enable-postproc --enable-gpl --enable-
 avfilter --enable-libx265 --enable-libx264 --enable-libfdk-aac --enable-
 pthreads --                                                    enable-
 swscale --enable-runtime-cpudetect --extra-ldflags=-static --disable-
 shared --disable-encoder=libgsm --disable-decoder=libgsm --disable-doc
 --enable-version3 --enable-nonfree --en
 able-libvpx --pkg-config-flags=--static
   libavutil      55. 24.100 / 55. 24.100
   libavcodec     57. 43.100 / 57. 43.100
   libavformat    57. 37.101 / 57. 37.101
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 46.100 /  6. 46.100
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 [concat @ 0x1ca08c60] Unsafe file name '../free/test2500.ts'
 t1: Operation not permitted



 Please advise on providing a concat file link to ffmpeg using relative
 path...

 The process is intended for a live web service, so "-safe 0" is not
 preferred for security reasons.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5629>
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