[FFmpeg-trac] #6034(documentation:new): Default chroma option and range are wrong at smartblur filter

[FFmpeg]

#6034: Default chroma option and range are wrong at smartblur filter
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             Reporter:  nicol        |                     Type:  defect
               Status:  new          |                 Priority:  minor
            Component:               |                  Version:  git-
  documentation                      |  master
             Keywords:  smartblur    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug: Default chroma option and range are wrong at smartblur
 filter.
 How to reproduce:
 {{{
 % ffmpeg -h filter=smartblur
 chroma_radius <float> ..FV.... set chroma radius (from -0.9 to 5) (default
 -0.9)
 cr <float> ..FV.... set chroma radius (from -0.9 to 5) (default -0.9)
 chroma_strength <float> ..FV.... set chroma strength (from -2 to 1)
 (default -2)
 cs <float> ..FV.... set chroma strength (from -2 to 1) (default -2)
 chroma_threshold <int> ..FV.... set chroma threshold (from -31 to 30)
 (default -31)
 ct <int> ..FV.... set chroma threshold (from -31 to 30) (default -31)

 https://ffmpeg.org/ffmpeg-filters.html#smartblur-1
 chroma_radius, cr

     Set the chroma radius. The option value must be a float number in the
 range [0.1,5.0] that specifies the variance of the gaussian filter used to
 blur the image (slower if larger). Default value is 1.0.

 chroma_strength, cs

     Set the chroma strength. The option value must be a float number in
 the range [-1.0,1.0] that configures the blurring. A value included in
 [0.0,1.0] will blur the image whereas a value included in [-1.0,0.0] will
 sharpen the image. Default value is 1.0.

 chroma_threshold, ct

     Set the chroma threshold used as a coefficient to determine whether a
 pixel should be blurred or not. The option value must be an integer in the
 range [-30,30]. A value of 0 will filter all the image, a value included
 in [0,30] will filter flat areas and a value included in [-30,0] will
 filter edges. Default value is 0.
 ffmpeg version N-82785-g6b95da9
 built on ... zeranoe
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6034>
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