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

FFmpeg trac at avcodec.org
Mon Apr 29 12:09:10 CEST 2013

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

Comment (by wolfgangw):

 Hm, it not only seems to accept X'Y'Z' but apparently it assumes X'Y'Z.
 Which will make DCinema people happy (me happy :) and everyone else using
 JPEG 2000 rather unhappy. The latter will get a color transform they did
 not and would not ask for.

 It is not at all safe to assume X'Y'Z' in JPEG 2000 in general. There
 needs to be a switch.

 Also with git HEAD -lowres n nags about highest possible value 0 and
 Nicolas just posted a patch to suppress the option entirely in
 libavcodec/jpeg2000dec.c. What's the reasoning behind this?

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1279#comment:24>
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