[FFmpeg-trac] #9947(avfilter:new): Misbehaving Curves Filter

[FFmpeg]

#9947: Misbehaving Curves Filter
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             Reporter:  kesh        |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  curves      |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by kesh):

 I submitted [a patch](  0001-avfilter-vf_curves-add-PCHIP-interpolator-
 and-interp.patch) last night to ffmpeg-devel list to add PCHIP
 interpolation to the curves filter option. Here are the input and output
 images of Michael Koch's test commands.

 Input:
 [[Image(test_gray.png)]]

 Output (original natural cubic interpolation):
 [[Image(out_natural.png)]]

 Output (patched PCHIP interpolation)
 [[Image(out_pchip.png)]]
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Ticket URL: <https://trac.ffmpeg.org/ticket/9947#comment:5>
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