Filter floodfill
  Fill area with same color with another color.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
floodfill AVOptions:
  x                 <int>        ..FV..... set pixel x coordinate (from 0 to 65535) (default 0)
  y                 <int>        ..FV..... set pixel y coordinate (from 0 to 65535) (default 0)
  s0                <int>        ..FV..... set source #0 component value (from -1 to 65535) (default 0)
  s1                <int>        ..FV..... set source #1 component value (from -1 to 65535) (default 0)
  s2                <int>        ..FV..... set source #2 component value (from -1 to 65535) (default 0)
  s3                <int>        ..FV..... set source #3 component value (from -1 to 65535) (default 0)
  d0                <int>        ..FV..... set destination #0 component value (from 0 to 65535) (default 0)
  d1                <int>        ..FV..... set destination #1 component value (from 0 to 65535) (default 0)
  d2                <int>        ..FV..... set destination #2 component value (from 0 to 65535) (default 0)
  d3                <int>        ..FV..... set destination #3 component value (from 0 to 65535) (default 0)

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

