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diff --git a/doc/filters.texi b/doc/filters.texi index ad2448acb2..12d40029dc 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -7183,6 +7183,42 @@ ffmpeg -f lavfi -i color=c=black:s=1280x720 -i video.mp4 -shortest -filter_compl @end example @end itemize +@section chromanr +Reduce chrominance noise. + +The filter accepts the following options: + +@table @option +@item thres +Set threshold for averaging chrominance values. +Sum of absolute difference of U and V pixel components or current +pixel and neighbour pixels lower than this threshold will be used in +averaging. Luma component is left unchanged and is copied to output. +Default value is 30. Allowed range is from 1 to 200. + +@item sizew +Set horizontal radius of rectangle used for averaging. +Allowed range is from 1 to 100. Default value is 5. + +@item sizeh +Set vertical radius of rectangle used for averaging. +Allowed range is from 1 to 100. Default value is 5. + +@item stepw +Set horizontal step when averaging. Default value is 1. +Allowed range is from 1 to 50. +Mostly useful to speed-up filtering. + +@item steph +Set vertical step when averaging. Default value is 1. +Allowed range is from 1 to 50. +Mostly useful to speed-up filtering. +@end table + +@subsection Commands +This filter supports same @ref{commands} as options. +The command accepts the same syntax of the corresponding option. + @section chromashift Shift chroma pixels horizontally and/or vertically. |