Filter vidstabtransform
  Transform the frames, pass 2 of 2 for stabilization (see vidstabdetect for pass 1).
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
vidstabtransform AVOptions:
  input             <string>     ..FV..... set path to the file storing the transforms (default "transforms.trf")
  smoothing         <int>        ..FV..... set number of frames*2 + 1 used for lowpass filtering (from 0 to 1000) (default 15)
  optalgo           <int>        ..FV..... set camera path optimization algo (from 0 to 2) (default opt)
     opt                          ..FV..... global optimization
     gauss                        ..FV..... gaussian kernel
     avg                          ..FV..... simple averaging on motion
  maxshift          <int>        ..FV..... set maximal number of pixels to translate image (from -1 to 500) (default -1)
  maxangle          <double>     ..FV..... set maximal angle in rad to rotate image (from -1 to 3.14) (default -1)
  crop              <int>        ..FV..... set cropping mode (from 0 to 1) (default keep)
     keep                         ..FV..... keep border
     black                        ..FV..... black border
  invert            <int>        ..FV..... invert transforms (from 0 to 1) (default 0)
  relative          <int>        ..FV..... consider transforms as relative (from 0 to 1) (default 1)
  zoom              <double>     ..FV..... set percentage to zoom (>0: zoom in, <0: zoom out (from -100 to 100) (default 0)
  optzoom           <int>        ..FV..... set optimal zoom (0: nothing, 1: optimal static zoom, 2: optimal dynamic zoom) (from 0 to 2) (default 1)
  zoomspeed         <double>     ..FV..... for adative zoom: percent to zoom maximally each frame (from 0 to 5) (default 0.25)
  interpol          <int>        ..FV..... set type of interpolation (from 0 to 3) (default bilinear)
     no                           ..FV..... no interpolation
     linear                       ..FV..... linear (horizontal)
     bilinear                     ..FV..... bi-linear
     bicubic                      ..FV..... bi-cubic
  tripod            <boolean>    ..FV..... enable virtual tripod mode (same as relative=0:smoothing=0) (default false)
  debug             <boolean>    ..FV..... enable debug mode and writer global motions information to file (default false)


