video media-video@gentoo.org Enable manually-optimised routines using the AMD 3DNow!Ex SIMD instruction set, present in modern AMD CPUs. (Check for 3dnowext in /proc/cpuinfo to know whether your CPU supports it). Enables Adaptive Multi-Rate Audio support Adds support for Advanced Vector Extensions instructions (Intel Sandy Bridge, AMD Bulldozer and later chips) Adds Xiph CELT/Opus audio decoding support via media-libs/celt Enables runtime CPU detection (useful for bindist, compatibility on other CPUs) Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac. Use external faac library for AAC encoding Use external faad library for AAC decoding (instead of internal libavcodec support) Enable frei0r wrapping in libavfilter Use pre-calculated tables rather than calculating them on the fly. Enables mmx2 support Enables network streaming support Force shared libraries to be built as PIC (this is slower) Build and install qt-faststart application Enable Real Time Messaging Protocol using librtmp Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec). faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips) Enables VAAPI (Video Acceleration API) for hardware decoding Enables VDPAU decoders (requires nVidia video cards to offload CPU processing to video card 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.