Filter prewitt
  Apply prewitt operator.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
prewitt AVOptions:
  planes            <int>        ..FV..... set planes to filter (from 0 to 15) (default 15)
  scale             <float>      ..FV..... set scale (from 0 to 65535) (default 1)
  delta             <float>      ..FV..... set delta (from -65535 to 65535) (default 0)

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

