Muxer caca [caca (color ASCII art) output device]:
    Default video codec: rawvideo.
caca_outdev AVOptions:
  -window_size       <image_size> E..... set window forced size
  -window_title      <string>     E..... set window title
  -driver            <string>     E..... set display driver
  -algorithm         <string>     E..... set dithering algorithm
  -antialias         <string>     E..... set antialias method
  -charset           <string>     E..... set charset used to render output
  -color             <string>     E..... set color used to render output
  -list_drivers      <int>        E..... list available drivers (from 0 to 1)
     true                         E.....
     false                        E.....
  -list_dither       <string>     E..... list available dither options
     algorithms                   E.....
     antialiases                  E.....
     charsets                     E.....
     colors                       E.....

