[FFmpeg-trac] #10839(swscale:closed): incorrect YCoCg to RGB conversion in swscale

[FFmpeg]

#10839: incorrect YCoCg to RGB conversion in swscale
---------------------------------------+-----------------------------------
             Reporter:  Connor Worley  |                    Owner:  (none)
                 Type:  defect         |                   Status:  closed
             Priority:  wish           |                Component:  swscale
              Version:  unspecified    |               Resolution:  wontfix
             Keywords:                 |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
---------------------------------------+-----------------------------------
Comment (by Balling):

 See my comment in https://trac.ffmpeg.org/ticket/9132#comment:2


 >Identity (and YCgCo) are very different matrices, as the order of
 operations are different (MatrixCoefficients 0 (Identity) or 8 (YCgCo) not
 only use different equations for the full-to-limited range adjustment but
 also perform the full-to-limited range adjustment before applying the
 transfer matrix).


 There is no point in implementing that, Chrome/Chromium implemented it and
 so did Nvidia. See https://github.com/mpv-player/mpv/issues/4340


 Mpv has much better code for this that just works. Ffplay uses SDL, that
 cannot support it, see #8862
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10839#comment:6>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker