Libav is a friendly and community-driven effort to provide its users with a set of portable, functional and high-performance libraries for dealing with multimedia formats of all sorts. It originates from the FFmpeg codebase, but goes its own way these days, providing its users with reliable releases and a clear vision how to go forward. Libav enable features (optional) with passing variables to the script VARIABLE=yes|no ./libav.SlackBuild: FREI0R=yes|no (default: no), requires frei0r BS2B=yes|no (default: no), requires libbs2b DC1394=yes|no (default: no), requires libdc1394 FAAC=yes|no (default: no), requires faac FDK_ACC=yes|no (default: no), requires libfdk-aac ILBC=yes|no (default: no), requires libilbc LAME=yes|no (default: no), requires lame OPENCORE=yes|no (default: no), requires opencore-amr OPENCV=yes|no (default: no), requires opencv OPENJPEG=yes|no (default: no), requires openjpeg OPUS=yes|no (default: no), requires opus PULSEAUDIO=yes|no (default: no), requires pulseaudio RTMP=yes|no (default: no), requires rtmpdump SCHROEDINGER=yes|no (default: no), requires schroedinger SPEEX=yes|no (default: no), requires speex TWOLAME=yes|no (default: no), requires twolame VPX=yes|no (default: no), requires libvpx WEBP=yes|no (default: no), requires libwebp X264=yes|no (default: no), requires x264 X265=yes|no (default: no), requires x265 XIV=yes|no (default: no), requires xvidcore All features are available from SlackBuilds.org repository. NOTE: This package conflict with ffmpeg. Do not install both.