Opus is a very popular audio codec, used for the real-time streaming of audio (such as in VoIP or live-TV applications). Quote from Wikipedia:
Opus is a lossy audio compression format developed by the Internet Engineering Task Force (IETF) that is particularly suitable for interactive real-time applications over the Internet.
In order to quickly compile your libopus, you can type the following commands in your shell:
$ cd /my/path/where/i/keep/compiled/stuff $ git clone git://git.opus-codec.org/opus.git $ cd opus $ ./autogen.sh $ ./configure --enable-static --enable-shared $ make # make install # ldconfig