<flagname="avresample">Enables libavresample, <pkg>media-video/libav</pkg> version of libswresample (which installed and makes libavresample redundant): A conversion library between uncompressed audio formats.</flag>
<flagname="libv4l">Uses <pkg>media-libs/libv4l</pkg> for video4linux instead of direct calls. Adds support for more devices via the userspace library.</flag>
<flagname="pic">Force shared libraries to be built as PIC (this is slower)</flag>
<flagname="rtmp">Enable Real Time Messaging Protocol using librtmp</flag>
<flagname="schroedinger">Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).</flag>
<flagname="vaapi">Enables VAAPI (Video Acceleration API) for hardware decoding</flag>
<flagname="vis"> Adds support for SIMD optimizations for UltraSPARC processors.</flag>
<flagname="vpx">Enables vp8 codec support using libvpx: Decoding vp8 does not require this to be enabled but libvpx can also be used for decoding; encoding vp8 requires this useflag to be enabled though.</flag>