Filter transpose
  Transpose input video.
    slice threading supported
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
transpose AVOptions:
  dir               <int>        ..FV.... set transpose direction (from 0 to 7) (default cclock_flip)
  passthrough       <int>        ..FV.... do not apply transposition if the input matches the specified geometry (from 0 to INT_MAX) (default none)
     none                         ..FV.... always apply transposition
     portrait                     ..FV.... preserve portrait geometry
     landscape                    ..FV.... preserve landscape geometry


