FFmpeg is a complete solution to record, convert and stream audio and video. It includes libavcodec, the leading audio/video codec library. You can enable a lot of optional (not-autodetected) features by passing variables to the script (VAR=yes/no ./ffmpeg.SlackBuild): ASS=yes|no (default: no), requires libass BLURAY=yes|no (default: no), requires libbluray CELT=yes|no (default: no), requires celt DC1394=yes|no (default: no), requires libdc1394 FAAC=yes|no (default: no), requires faac (creates non-redistributable binary) FREI0R=yes|no (default: no), requires frei0r GSM=yes|no (default: no), requires gsm JP2=yes|no (default: no), requires openjpeg LAME=yes|no (default: yes), requires lame OPENAL=yes|no (default: no), requires OpenAL OPENCORE=yes|no (default: no), requires opencore-amr OPENSSL=yes|no (default: no), creates non-redistributable binary RTMP=yes|no (default: no), requires rtmpdump SCHROEDINGER=yes|no (default: no), requires schroedinger SPEEX=yes|no (default: no), requires speex VPX=yes|no (default: no), requires libvpx X264=yes|no (default: yes), requires x264 XVID=yes|no (default: no), requires xvidcore Make sure to run this script in a real root shell ("su -") and that you have either tetex or texlive installed. All of the mentioned requirements are available from SlackBuilds.org