Filter deshake
  Stabilize shaky video.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
deshake AVOptions:
  x                 <int>        ..FV.... set x for the rectangular search area (from -1 to INT_MAX) (default -1)
  y                 <int>        ..FV.... set y for the rectangular search area (from -1 to INT_MAX) (default -1)
  w                 <int>        ..FV.... set width for the rectangular search area (from -1 to INT_MAX) (default -1)
  h                 <int>        ..FV.... set height for the rectangular search area (from -1 to INT_MAX) (default -1)
  rx                <int>        ..FV.... set x for the rectangular search area (from 0 to 64) (default 16)
  ry                <int>        ..FV.... set y for the rectangular search area (from 0 to 64) (default 16)
  edge              <int>        ..FV.... set edge mode (from 0 to 3) (default mirror)
     blank                        ..FV.... fill zeroes at blank locations
     original                     ..FV.... original image at blank locations
     clamp                        ..FV.... extruded edge value at blank locations
     mirror                       ..FV.... mirrored edge at blank locations
  blocksize         <int>        ..FV.... set motion search blocksize (from 4 to 128) (default 8)
  contrast          <int>        ..FV.... set contrast threshold for blocks (from 1 to 255) (default 125)
  search            <int>        ..FV.... set search strategy (from 0 to 1) (default exhaustive)
     exhaustive                   ..FV.... exhaustive search
     less                         ..FV.... less exhaustive search
  filename          <string>     ..FV.... set motion search detailed log file name
  opencl            <boolean>    ..FV.... ignored (default false)


