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)
     cclock_flip     0            ..FV..... rotate counter-clockwise with vertical flip
     clock           1            ..FV..... rotate clockwise
     cclock          2            ..FV..... rotate counter-clockwise
     clock_flip      3            ..FV..... rotate clockwise with vertical flip
  passthrough       <int>        ..FV..... do not apply transposition if the input matches the specified geometry (from 0 to INT_MAX) (default none)
     none            0            ..FV..... always apply transposition
     portrait        2            ..FV..... preserve portrait geometry
     landscape       1            ..FV..... preserve landscape geometry


