[FFmpeg-trac] #4637(undetermined:new): Wrong PGS subtitle colourspace

[FFmpeg]

#4637: Wrong PGS subtitle colourspace
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  minor      |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  pgssub
             Blocked By:             |  videolan
Reproduced by developer:  0          |               Blocking:
                                     |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 (videolan ticket 14777)
 The subtitle background is gray which is apparently wrong, it should be
 the same colour as the movie frame (black).
 {{{
 $ ffmpeg -i darkgraysubs.m2ts -filter_complex [0:0][0:2]overlay -qscale 2
 -an out.avi
 ffmpeg version N-72996-gd1050d9 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 27.100 / 54. 27.100
   libavcodec     56. 41.100 / 56. 41.100
   libavformat    56. 37.100 / 56. 37.100
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 17.100 /  5. 17.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.100 /  1.  2.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, mpegts, from 'darkgraysubs.m2ts':
   Duration: 01:57:18.53, start: 600.000000, bitrate: 0 kb/s
   Program 1
     Stream #0:0[0x1011]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p, 1280x720, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
     Stream #0:1[0x1100](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
 stereo, fltp, 96 kb/s
     Stream #0:2[0x1200](eng): Subtitle: hdmv_pgs_subtitle ([144][0][0][0]
 / 0x0090), 1280x720
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf56.37.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x720,
 q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)
     Metadata:
       encoder         : Lavc56.41.100 mpeg4
 Stream mapping:
   Stream #0:0 (h264) -> overlay:main
   Stream #0:2 (pgssub) -> overlay:overlay
   overlay -> Stream #0:0 (mpeg4)
 Press [q] to stop, [?] for help
 frame=  241 fps=180 q=2.0 Lsize=     394kB time=00:00:10.05 bitrate=
 321.5kbits/s dup=0 drop=2
 video:383kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 2.982323%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4637>
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