Filter life
  Create life.
    Inputs:
        none (source filter)
    Outputs:
       #0: default (video)
life AVOptions:
  filename          <string>     ..FV..... set source file
  f                 <string>     ..FV..... set source file
  size              <image_size> ..FV..... set video size
  s                 <image_size> ..FV..... set video size
  rate              <video_rate> ..FV..... set video rate (default "25")
  r                 <video_rate> ..FV..... set video rate (default "25")
  rule              <string>     ..FV..... set rule (default "B3/S23")
  random_fill_ratio <double>     ..FV..... set fill ratio for filling initial grid randomly (from 0 to 1) (default 0.618034)
  ratio             <double>     ..FV..... set fill ratio for filling initial grid randomly (from 0 to 1) (default 0.618034)
  random_seed       <int>        ..FV..... set the seed for filling the initial grid randomly (from -1 to UINT32_MAX) (default -1)
  seed              <int>        ..FV..... set the seed for filling the initial grid randomly (from -1 to UINT32_MAX) (default -1)
  stitch            <boolean>    ..FV..... stitch boundaries (default true)
  mold              <int>        ..FV..... set mold speed for dead cells (from 0 to 255) (default 0)
  life_color        <color>      ..FV..... set life color (default "white")
  death_color       <color>      ..FV..... set death color (default "black")
  mold_color        <color>      ..FV..... set mold color (default "black")


