Filter datascope
  Video data analysis.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
datascope AVOptions:
  size              <image_size> ..FV..... set output size (default "hd720")
  s                 <image_size> ..FV..... set output size (default "hd720")
  x                 <int>        ..FV..... set x offset (from 0 to INT_MAX) (default 0)
  y                 <int>        ..FV..... set y offset (from 0 to INT_MAX) (default 0)
  mode              <int>        ..FV..... set scope mode (from 0 to 2) (default mono)
     mono            0            ..FV.....
     color           1            ..FV.....
     color2          2            ..FV.....
  axis              <boolean>    ..FV..... draw column/row numbers (default false)
  opacity           <float>      ..FV..... set background opacity (from 0 to 1) (default 0.75)


