Adicione os repositórios a seguir abrindo o seus source list com o comando sudo gedit /etc/apt/sources.list
## PLF REPOSITORY (Unsupported. May contain illegal packages. Use at own risk.)
#deb
http://packages.freecontrib.org/plf edgy free non-free
#deb-src
http://packages.freecontrib.org/plf edgy free non-free
## CANONICAL COMMERCIAL REPOSITORY (Hosted on Canonical servers, not Ubuntu
## servers. RealPlayer10, Opera and more to come.)
deb
http://archive.canonical.com/ubuntu dapper-commercial main
## Listen
deb
http://theli.free.fr/packages/ dapper listen
em seguida execute sudo aptitude update
E DEPOIS do comando acima:
sudo apt-get install gstreamer0.10-ffmpeg gstreamer0.10-gl gstreamer0.10-plugins-base \
gstreamer0.10-plugins-good gstreamer0.10-plugins-bad gstreamer0.10-plugins-bad-multiverse \
gstreamer0.10-plugins-ugly gstreamer0.10-plugins-ugly-multiverse w32codecs