VAAPI

VAAPI (Video Acceleration API) provides access to graphics hardware (GPU) acceleration for video processing.

Installation
Portage knows the global USE flag vaapi for enabling support for VAAPI in other packages. Enabling this USE flag will pull in automatically:

The USE flags of libva are:

After setting this you want to update your system so the changes take effect:

Configuration
You may need to tweak the config files of the programs, you can make use of VAAPI.

Usage
vainfo shows if VAAPI is supported.