Filter deflicker
  Remove temporal frame luminance variations.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
deflicker AVOptions:
  size              <int>        ..FV...... set how many frames to use (from 2 to 129) (default 5)
  s                 <int>        ..FV...... set how many frames to use (from 2 to 129) (default 5)
  mode              <int>        ..FV...... set how to smooth luminance (from 0 to 6) (default am)
     am              0            ..FV...... arithmetic mean
     gm              1            ..FV...... geometric mean
     hm              2            ..FV...... harmonic mean
     qm              3            ..FV...... quadratic mean
     cm              4            ..FV...... cubic mean
     pm              5            ..FV...... power mean
     median          6            ..FV...... median
  m                 <int>        ..FV...... set how to smooth luminance (from 0 to 6) (default am)
     am              0            ..FV...... arithmetic mean
     gm              1            ..FV...... geometric mean
     hm              2            ..FV...... harmonic mean
     qm              3            ..FV...... quadratic mean
     cm              4            ..FV...... cubic mean
     pm              5            ..FV...... power mean
     median          6            ..FV...... median
  bypass            <boolean>    ..FV...... leave frames unchanged (default false)


