[FFmpeg-trac] #2698(avfilter:new): colorbalance filter should also work without YUV to RGB conversion

[FFmpeg]

#2698: colorbalance filter should also work without YUV to RGB conversion
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             Reporter:  feelart      |                     Type:
               Status:  new          |  enhancement
            Component:  avfilter     |                 Priority:  normal
             Keywords:               |                  Version:  git-
  colorbalance                       |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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 Current colorbalance filter only works in RGB space.

 This can have significant visual differences in the piping filters order.

 For instance, on a
 Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17008 kb/s,
 30.01 fps

  - vf lut=y=gammaval(0.65),colorbalance=bh=-.1:bm=-.1:bs=-.1

 Is very different in quality result from

 - vf colorbalance=bh=-.1:bm=-.1:bs=-.1,lut=y=gammaval(0.65)

 FYI: http://ffmpeg.org/pipermail/ffmpeg-user/2013-May/015311.html

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2698>
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