Filter avgblur
  Apply Average Blur filter.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
avgblur AVOptions:
  sizeX             <int>        ..FV..... set horizontal size (from 1 to 1024) (default 1)
  planes            <int>        ..FV..... set planes to filter (from 0 to 15) (default 15)
  sizeY             <int>        ..FV..... set vertical size (from 0 to 1024) (default 0)

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

