[FFmpeg-trac] #6897(avformat:new): Invalid output file with -acodec copy

[FFmpeg]

#6897: Invalid output file with -acodec copy
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:  avformat
                Version:  git-       |               Keywords:  mov
  master                             |  regression
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 http://ffmpeg.org/pipermail/libav-user/2017-December/010789.html
 {{{
 $ ffmpeg -lavfi sine=d=1 -acodec pcm_s16le out.avi
 }}}
 FFmpeg does not error out when trying to mux an invalid (pcm) codec into
 mp4 since e199d90da6473abc0d010797b14f2ae2c9811d34
 {{{
 $ ffmpeg -i out.avi -acodec copy out.mp4
 ffmpeg version N-89404-gdc7d5f9 Copyright (c) 2000-2017 the FFmpeg
 developers
   built with gcc 6.3.0 (GCC)
   configuration: --enable-gpl
   libavutil      56.  5.100 / 56.  5.100
   libavcodec     58.  6.103 / 58.  6.103
   libavformat    58.  2.103 / 58.  2.103
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7.  7.100 /  7.  7.100
   libswscale      5.  0.101 /  5.  0.101
   libswresample   3.  0.101 /  3.  0.101
   libpostproc    55.  0.100 / 55.  0.100
 [avi @ 0x278c380] Estimating duration from bitrate, this may be inaccurate
 Guessed Channel Layout for Input Stream #0.0 : mono
 Input #0, avi, from 'out.avi':
   Metadata:
     encoder         : Lavf58.2.103
   Duration: 00:00:01.01, start: 0.000000, bitrate: 750 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
 s16, 705 kb/s
 Output #0, mp4, to 'out.mp4':
   Metadata:
     encoder         : Lavf58.2.103
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
 s16, 705 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 size=      87kB time=00:00:00.99 bitrate= 712.2kbits/s speed=1.6e+03x
 video:0kB audio:86kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.782313%
 }}}
 The output file is unreadable.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6897>
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