[FFmpeg-trac] #8198(avformat:new): mpjpeg demuxer is detected but does not work

FFmpeg trac at avcodec.org
Wed Sep 25 02:29:21 EEST 2019


#8198: mpjpeg demuxer is detected but does not work
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:  avformat
                Version:  git-       |               Keywords:  mjpeg
  master                             |  mpjpeg regression
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 mpv issue 6964, not directly related to #5023 afaict.
 A sample was provided that does work with `-f mjpeg`, does not work since
 6dc1d5f87ced885d748f8d0c7bfbc5ff6471483f when the sample was first
 detected as mpjpeg.
 {{{
 $ ffmpeg -i ztpl.idontkn -f null -
 ffmpeg version N-94961-g1d86e4b3eb Copyright (c) 2000-2019 the FFmpeg
 developers
   built with clang version 8.0.1 (tags/RELEASE_801/final 366581)
   configuration: --cc=clang --enable-gpl --enable-gnutls --enable-libxml2
 --enable-libx264 --enable-libx265 --enable-libvpx --enable-libaom
 --enable-libdavs2
   libavutil      56. 35.100 / 56. 35.100
   libavcodec     58. 57.100 / 58. 57.100
   libavformat    58. 32.104 / 58. 32.104
   libavdevice    58.  9.100 / 58.  9.100
   libavfilter     7. 58.102 /  7. 58.102
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
 Input #0, mpjpeg, from 'ztpl.idontkn':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc,
 bt470bg/unknown/unknown), 638x478 [SAR 1:1 DAR 319:239], 25 tbr, 25 tbn,
 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (mjpeg (native) -> wrapped_avframe (native))
 Press [q] to stop, [?] for help
 ztpl.idontkn: corrupt input packet in stream 0
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf58.32.104
     Stream #0:0: Video: wrapped_avframe, yuvj420p, 638x478 [SAR 1:1 DAR
 319:239], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.57.100 wrapped_avframe
 frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A
 speed=23.2x
 video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}
 The sample contains 95 frames.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8198>
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