[FFmpeg-trac] #1279(swscale:open): Transform X'Y'Z' to RGB via lutrgb

[FFmpeg]

#1279: Transform X'Y'Z' to RGB via lutrgb
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             Reporter:  wolfgangw    |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  swscale
              Version:  git-master   |               Resolution:
             Keywords:  XYZ j2k      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by wolfgangw):

 This enhancement request is about the possible right-hand-side values in
 -vf lutrgb ... not at all specific to XYZ. I'm pretty sure swscale has
 nothing to do with it either.

 Also I'm seeing only now that Carlos had changed the keywords from "RGB
 3x3 matrix transform" to "j2k". This is not about j2k at all. Can you
 correct that? Would be a shame if this turns "unfindable"

 Again, I'm asking for how to make r, g and b availabe on the right-hand-
 side expressions in -vf lutrgb. As of now the possible values (according
 to http://ffmpeg.org/libavfilter.html#lut_002c-lutrgb_002c-lutyuv) are w,
 h, val, clipval, minval, maxval, negval and clip(val).

 Usefulness of lutrgb would explode if r, g and b were available in those
 expressions (rhs).

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1279#comment:11>
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