Filter freezedetect
  Detects frozen video input.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
freezedetect AVOptions:
  n                 <double>     ..FV..... set noise tolerance (from 0 to 1) (default 0.001)
  noise             <double>     ..FV..... set noise tolerance (from 0 to 1) (default 0.001)
  d                 <duration>   ..FV..... set minimum duration in seconds (default 2)
  duration          <duration>   ..FV..... set minimum duration in seconds (default 2)


