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

[FFmpeg]

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

 Replying to [comment:40 rexbron]:

 > If one was using FFmpeg and an SDI playout card like a Blackmagic, the
 projector would need to be fed the decoded but untransformed 12bit X'Y'Z'
 signal.

 I don't see why this shouldn't be possible with the current solution:
 Converting the colour space is absolutely not mandatory. Also please test
 {{{mplayer -vo gl}}}

 For which application is another matrix needed, ie when would it help if a
 matrix can be specified?

 > What I can say is that FFmpeg often makes colorspace assumptions based
 on pixel format, which can be incorrect.

 Please provide samples.

 Not necessarily related to above:
 FFmpeg provides a media conversion command line application and a set of
 libraries. Both work well now with the sample provided in this ticket (see
 {{{mplayer -vo gl}}}). FFplay is a very useful tool, but it currently is
 not the answer when you are searching for a playback application and that
 it only works on sRGB screens is imo unrelated to this ticket.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1279#comment:42>
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