[FFmpeg-trac] #8633(undetermined:new): First frame of scaled GIF partially persists on subsequent frames' transparent area

FFmpeg trac at avcodec.org
Sat Apr 25 12:46:36 EEST 2020


#8633: First frame of scaled GIF partially persists on subsequent frames'
transparent area
-------------------------------------+-------------------------------------
             Reporter:  SeinopSys    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  gif scale    |               Blocked By:
  trailing ghosting transparency     |
  alpha                              |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by SeinopSys):

 Correction to the command: the output is actually a result of the
 following scale options:

 {{{
 ffmpeg -i dot.gif -lavfi "[0:v] scale=w=50:h=50:flags=lanczos,split
 [a][b]; [a] palettegen [p]; [b][p] paletteuse" scaled.gif
 }}}

 I ended up copying the output under the wrong run, but the version and all
 other information besides the input/output size is correct.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8633#comment:1>
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