[FFmpeg-trac] #4829(swscale:new): Overflows (?) in xyz -> rgb conversion

[FFmpeg]

#4829: Overflows (?) in xyz -> rgb conversion
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             Reporter:  cehoyos     |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  swscale
              Version:  git-master  |               Resolution:
             Keywords:  xyz         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by cehoyos):

 The command line here still produces a png with massive artefacts
 (''posterization'') in the top left corner with current FFmpeg git head,
 the artefacts do not appear without a colour space conversion, see ticket
 #4827.
 This may or may not be a duplicate of ticket #3643.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4829#comment:2>
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