[FFmpeg-trac] #8861(avfilter:new): Creating GIF with full transparent background from PNGs with semi-transparent pixels, somehow causes this outline

[FFmpeg]

#8861: Creating GIF with full transparent background from PNGs with semi-
transparent pixels, somehow causes this outline
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             Reporter:  karl-police  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:  paletteuse   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by karl-police):

 Is it possible in FFMPEG to do these color replacements?

 As example on https://i.imgur.com/GotzcqY.gif

 you see the "Red, Green, Blue" templates. And, apperantly you split them
 up and then you define another RGB color to replace all with. I'm not sure
 how that is called. A general term for it seems to be color interpolation,
 but that just means, math with colors or something.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8861#comment:16>
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