Filter avectorscope
  Convert input audio to vectorscope video output.
    Inputs:
       #0: default (audio)
    Outputs:
       #0: default (video)
avectorscope AVOptions:
  mode              <int>        ..FV.... set mode (from 0 to 2) (default lissajous)
     lissajous                    ..FV.... 
     lissajous_xy                 ..FV.... 
     polar                        ..FV.... 
  m                 <int>        ..FV.... set mode (from 0 to 2) (default lissajous)
     lissajous                    ..FV.... 
     lissajous_xy                 ..FV.... 
     polar                        ..FV.... 
  rate              <video_rate> ..FV.... set video rate (default "25")
  r                 <video_rate> ..FV.... set video rate (default "25")
  size              <image_size> ..FV.... set video size (default "400x400")
  s                 <image_size> ..FV.... set video size (default "400x400")
  rc                <int>        ..FV.... set red contrast (from 0 to 255) (default 40)
  gc                <int>        ..FV.... set green contrast (from 0 to 255) (default 160)
  bc                <int>        ..FV.... set blue contrast (from 0 to 255) (default 80)
  ac                <int>        ..FV.... set alpha contrast (from 0 to 255) (default 255)
  rf                <int>        ..FV.... set red fade (from 0 to 255) (default 15)
  gf                <int>        ..FV.... set green fade (from 0 to 255) (default 10)
  bf                <int>        ..FV.... set blue fade (from 0 to 255) (default 5)
  af                <int>        ..FV.... set alpha fade (from 0 to 255) (default 5)
  zoom              <double>     ..FV.... set zoom factor (from 1 to 10) (default 1)
  draw              <int>        ..FV.... set draw mode (from 0 to 1) (default dot)
     dot                          ..FV.... 
     line                         ..FV.... 
  scale             <int>        ..FV.... set amplitude scale mode (from 0 to 3) (default lin)
     lin                          ..FV.... linear
     sqrt                         ..FV.... square root
     cbrt                         ..FV.... cube root
     log                          ..FV.... logarithmic


