Filter scroll
  Scroll input video.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
scroll AVOptions:
  horizontal        <float>      ..FV.....T set the horizontal scrolling speed (from -1 to 1) (default 0)
  h                 <float>      ..FV.....T set the horizontal scrolling speed (from -1 to 1) (default 0)
  vertical          <float>      ..FV.....T set the vertical scrolling speed (from -1 to 1) (default 0)
  v                 <float>      ..FV.....T set the vertical scrolling speed (from -1 to 1) (default 0)
  hpos              <float>      ..FV...... set initial horizontal position (from 0 to 1) (default 0)
  vpos              <float>      ..FV...... set initial vertical position (from 0 to 1) (default 0)

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

