alsa-lib : Advanced Linux Sound Architecture Library ( https://alsa-project.org/ )
glm : OpenGL Mathematics ( http://glm.g-truc.net/ )
kvazaar : Open-source HEVC encoder ( http://ultravideo.cs.tut.fi/ https://github.com/ultravideo/kvazaar )
libepoxy : Epoxy is a library for handling OpenGL function pointer management for you ( https://github.com/anholt/libepoxy )
libjpeg-turbo : MMX, SSE, and SSE2 SIMD accelerated JPEG library ( https://libjpeg-turbo.org/ https://sourceforge.net/projects/libjpeg-turbo/ )
libvpx : WebM VP8 and VP9 Codec SDK ( https://www.webmproject.org )
x264 : A free library for encoding X264/AVC streams ( https://www.videolan.org/developers/x264.html )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gnux32
For Paludis use this rsync : rsync://gentoo.zugaina.org/gnux32-portage
If you have a problem : ycarus(-at-)zugaina.org