system-gnutls?
      ( >=net-libs/gnutls-3.4.14 )

system-pjproject?
      ( >=net-libs/pjproject-2.5.5:2/9999 )

>=dev-cpp/yaml-cpp-0.5.3
>=dev-libs/boost-1.61.0
>=dev-libs/crypto++-5.6.5
>=dev-libs/jsoncpp-1.7.2
>=media-libs/libsamplerate-0.1.8
>=media-libs/libsndfile-1.0.25[-minimal]

!libav?
      ( >=media-video/ffmpeg-3.1.3[encode,gsm?
,iconv,libilbc?
,opus?
,speex?
,v4l,vaapi?
,vdpau?
,vorbis?
,vpx?
,x264?
,zlib] )

libav?
      ( >=media-video/libav-12:0=[encode,gsm?
,opus?
,speex?
,v4l,vaapi?
,vdpau?
,vorbis?
,vpx?
,x264?
,zlib] )

libilbc?
      ( media-libs/libilbc )

speex?
      ( >=media-libs/speex-1.2.0 )

speexdsp?
      ( >=media-libs/speexdsp-1.2_rc3 )

>=net-libs/opendht-1.3.1
>=sys-libs/zlib-1.2.8
x11-libs/libva

alsa?
      ( media-libs/alsa-lib )

jack?
      ( virtual/jack )

portaudio?
      ( >=media-libs/portaudio-19_pre20140130 )

pulseaudio?
      ( media-sound/pulseaudio[alsa?
,libsamplerate] )

dbus?
      ( dev-libs/dbus-c++ )

ringns?
      ( >=net-libs/restbed-4.5 )

restbed?
      ( >=net-libs/restbed-4.5 )

sdes?
      ( >=dev-libs/libpcre-8.40 )

video?
      ( virtual/libudev )

nat-pmp?
      ( net-libs/libnatpmp )

upnp?
      ( >=net-libs/libupnp-1.6.19:= )