[FFmpeg-trac] #8802(undetermined:new): Incorrect gif generation on ppc64le

FFmpeg trac at avcodec.org
Mon Jul 20 02:26:55 EEST 2020

#8802: Incorrect gif generation on ppc64le
             Reporter:  Underpaid    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Using palettes to create gifs produces output with single-pixel vertical
 columns between transparent space. (Creating gifs with the more
 rudimentary "''ffmpeg -i file.mp4 -ss 1 -t 4 -r 480:272 output.gif
 -hide_banner''" does work, however.)

 To recreate on a ppc64le environment:

 ffmpeg -v warning -ss 1 -t 4 -i file.mp4 -vf
 "fps=15,scale=480:-1:flags=lanczos,palettegen" -y

 ffmpeg -v warning -ss 1 -t 4 -i file.mp4 -i /path/to/temporary_palette
 -lavfi "fps=15,scale=480:-1:flags=lanczos [x]; [x][1:v] paletteuse" -y

 The output creates a gif with thin columns which appear to have some color
 and animation data.

 Sample files are attached.

Ticket URL: <https://trac.ffmpeg.org/ticket/8802>
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