Decoder libfdk_aac [Fraunhofer FDK AAC]:
    General capabilities: dr1 chconf 
    Threading capabilities: none
libfdk-aac decoder AVOptions:
  -conceal           <int>        .D..A... Error concealment method (from 0 to 2) (default noise)
     spectral                     .D..A... Spectral muting
     noise                        .D..A... Noise Substitution
     energy                       .D..A... Energy Interpolation
  -drc_boost         <int>        .D..A... Dynamic Range Control: boost, where [0] is none and [127] is max boost (from -1 to 127) (default -1)
  -drc_cut           <int>        .D..A... Dynamic Range Control: attenuation factor, where [0] is none and [127] is max compression (from -1 to 127) (default -1)
  -drc_level         <int>        .D..A... Dynamic Range Control: reference level, quantized to 0.25dB steps where [0] is 0dB and [127] is -31.75dB (from -1 to 127) (default -1)
  -drc_heavy         <int>        .D..A... Dynamic Range Control: heavy compression, where [1] is on (RF mode) and [0] is off (from -1 to 1) (default -1)
  -level_limit       <int>        .D..A... Signal level limiting (from -1 to 1) (default 0)


