[FFmpeg-trac] #6813(undetermined:new): Transparency broken when encoding animated gif

FFmpeg trac at avcodec.org
Tue Nov 7 14:39:25 EET 2017


#6813: Transparency broken when encoding animated gif
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  gif alpha
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 {{{
 $ ffmpeg -i transparency.apng out.gif
 ffmpeg version N-88605-g991eca0 Copyright (c) 2000-2017 the FFmpeg
 developers
   built with gcc 6.3.0 (GCC)
   configuration: --enable-gpl --cc=/usr/local/gcc-6.3.0/bin/gcc
   libavutil      56.  0.100 / 56.  0.100
   libavcodec     58.  1.100 / 58.  1.100
   libavformat    58.  2.100 / 58.  2.100
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7.  0.101 /  7.  0.101
   libswscale      5.  0.101 /  5.  0.101
   libswresample   3.  0.101 /  3.  0.101
   libpostproc    55.  0.100 / 55.  0.100
 Input #0, apng, from 'transparency.apng':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: apng, pal8(pc), 300x180, 4 fps, 4 tbr, 100k tbn,
 100k tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (apng (native) -> gif (native))
 Press [q] to stop, [?] for help
 Output #0, gif, to 'out.gif':
   Metadata:
     encoder         : Lavf58.2.100
     Stream #0:0: Video: gif, pal8, 300x180, q=2-31, 200 kb/s, 4 fps, 100
 tbn, 4 tbc
     Metadata:
       encoder         : Lavc58.1.100 gif
 frame=   93 fps=0.0 q=-0.0 Lsize=    1190kB time=00:00:23.01 bitrate=
 423.5kbits/s speed= 473x
 video:1188kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.126995%
 }}}
 Output file is broken.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6813>
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