Filter edgedetect
  Detect and draw edge.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
edgedetect AVOptions:
  high              <double>     ..FV..... set high threshold (from 0 to 1) (default 0.196078)
  low               <double>     ..FV..... set low threshold (from 0 to 1) (default 0.0784314)
  mode              <int>        ..FV..... set mode (from 0 to 1) (default wires)
     wires                        ..FV..... white/gray wires on black
     colormix                     ..FV..... mix colors

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

