optional_depends libvorbis  "--enable-libvorbis"  ""  "for ogg-vorbis support"
optional_depends libtheora  "--enable-libtheora"  ""  "for theora support"
optional_depends faad       "--enable-libfaad"    ""  "for faad support"
optional_depends faac       "--enable-libfaac"    ""  "for faac support"
optional_depends lame       "--enable-libmp3lame" ""  "for mp3 support"
optional_depends xvidcore   "--enable-libxvid"    ""  "for xvid support"
optional_depends libdc1394  "--enable-libdc1394"  ""  "for firewire support"
optional_depends x264-git   "--enable-libx264"    ""  "for H264 support"
optional_depends amrwb      "--enable-libamr-wb"  ""  "for AMR Wideband speech"
optional_depends amrnb      "--enable-libamr-nb"  ""  "for AMR narrowband speech"
#optional_depends gsmlib    "--enable-libgsm"     ""  "for gsm support"

