anchor.diff:      libjack2 ladspaH lame libaom libass libbluray libbs2b libcaca libdc1394 libmodplug libmysofa
       libogg libopus librsvg libssh libtheora libvdpau libvorbis libvpx libwebp libX11
       libxcb libXv libXext lzma openal openjpeg libpulseaudio rtmpdump opencore-amr
  -    samba SDL2 soxr speex vid-stab vo-amrwbenc wavpack x264 x265 xavs xvidcore
  +    samba SDL2 soxr speex srt vid-stab vo-amrwbenc wavpack x264 x265 xavs xvidcore
       zeromq4 zlib
     ] ++ optionals openglExtlib [ libGL libGLU ]
       ++ optionals nonfreeLicensing [ fdk_aac openssl ]
  
positive.code:     #(enableFeature (libnut != null) "libnut")
      (enableFeature (libopus != null) "libopus")
      (enableFeature (librsvg != null) "librsvg")
      (enableFeature (libssh != null) "libssh")
      (enableFeature (libtheora != null) "libtheora")
      (enableFeature (if isLinux then libv4l != null else false) "libv4l2")
  
negative.code: #, shine ? null # Fixed-point MP3 encoder
  , soxr ? null # Resampling via soxr
  , speex ? null # Speex de/encoder
  , srt ? null # Secure Reliable Transport (SRT) protocol
  #, twolame ? null # MP2 encoder
  #, utvideo ? null # Ut Video de/encoder
  , vid-stab ? null # Video stabilization
  