http://people.salixos.org/laprjns/opal/3.10.11/SLKBUILD
https://sourceforge.net/projects/opalvoip/files/v3.10%20Luyten/Stable%2011/opal-3.10.11.tar.bz2
http://people.salixos.org/laprjns/opal/3.10.11/opal-ffmpeg.patch
http://people.salixos.org/laprjns/opal/3.10.11/opal-ffmpeg3.patch