[FFmpeg-trac] #11254(swscale:open): "-sws_dither none" seemingly does not work for 8 bit content (was: "-sws_dither" seemingly ineffective)

[FFmpeg]

#11254: "-sws_dither none" seemingly does not work for 8 bit content
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             Reporter:               |                    Owner:  (none)
  MasterQuestionable                 |
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  swscale
              Version:  git-master   |               Resolution:
             Keywords:  sws_dither   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by Balling):

 * status:  new => open
 * summary:  "-sws_dither" seemingly ineffective => "-sws_dither none"
     seemingly does not work for 8 bit content

Comment:

 Why did you open this? sws_dither does work, both scale=sws_dither=0 or
 scale=sws_dither=none or -sws_dither 0.

 It just does not work for some specific cases, like when bitdepth does not
 change, see update in  https://trac.ffmpeg.org/ticket/979#comment:24
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Ticket URL: <https://trac.ffmpeg.org/ticket/11254#comment:2>
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