Filter median
  Apply Median filter.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
median AVOptions:
  radius            <int>        ..FV.....T set median radius (from 1 to 127) (default 1)
  planes            <int>        ..FV.....T set planes to filter (from 0 to 15) (default 15)
  radiusV           <int>        ..FV.....T set median vertical radius (from 0 to 127) (default 0)
  percentile        <float>      ..FV.....T set median percentile (from 0 to 1) (default 0.5)

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

