Filter lut2
  Compute and apply a lookup table from two video inputs.
    Inputs:
       #0: srcx (video)
       #1: srcy (video)
    Outputs:
       #0: default (video)
lut2 AVOptions:
  c0                <string>     ..FV.... set component #0 expression (default "x")
  c1                <string>     ..FV.... set component #1 expression (default "x")
  c2                <string>     ..FV.... set component #2 expression (default "x")
  c3                <string>     ..FV.... set component #3 expression (default "x")

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

