Filter chromanr
  Reduce chrominance noise.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
chromanr AVOptions:
  thres             <float>      ..FV.....T. set y+u+v threshold (from 1 to 200) (default 30)
  sizew             <int>        ..FV.....T. set horizontal size (from 1 to 100) (default 5)
  sizeh             <int>        ..FV.....T. set vertical size (from 1 to 100) (default 5)
  stepw             <int>        ..FV.....T. set horizontal step (from 1 to 50) (default 1)
  steph             <int>        ..FV.....T. set vertical step (from 1 to 50) (default 1)
  threy             <float>      ..FV.....T. set y threshold (from 1 to 200) (default 200)
  threu             <float>      ..FV.....T. set u threshold (from 1 to 200) (default 200)
  threv             <float>      ..FV.....T. set v threshold (from 1 to 200) (default 200)

This filter has support for timeline through the 'enable' option.

