[FFmpeg-trac] #10920(avfilter:new): "paletteuse" keeps unused colors for PNG unnecessarily

[FFmpeg]

#10920: "paletteuse" keeps unused colors for PNG unnecessarily
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             Reporter:               |                     Type:
  MasterQuestionable                 |  enhancement
               Status:  new          |                 Priority:  normal
            Component:  avfilter     |                  Version:
                                     |  unspecified
             Keywords:  paletteuse   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Unsure for other formats.
         But for PNG, it's unnecessary.

         Tested with !`-lavfi "paletteuse=dither=none"`.

         See also:
 https://trac.ffmpeg.org/query?reporter=MasterQuestionable&time=2024-03-20&col=id&col=type&col=summary&col=component&col=keywords&col=reporter&col=status&col=resolution&col=time&col=changetime&order=changetime&desc=1
         (my recent posts on "palettegen"/"paletteuse")
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Ticket URL: <https://trac.ffmpeg.org/ticket/10920>
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