Gstreamer

Ah mas eu quero ter o gstreamer no meu ubuntu para ouvir todo tipo de mp3 e assistir os mp4 e outros codecs de video.

Now to install, type:

sudo apt-get update
sudo apt-get install ubuntu-restricted-extras libxine1-ffmpeg
sudo aptitude install libdvdread3 libdvdnav4 libdvdcss2 regionset gnome-mplayer
sudo aptitude install non-free-codecs w32codecs
sudo aptitude install gstreamer0.10-pitfdll gstreamer0.10-plugins-good
sudo aptitude install gstreamer0.10-plugins-ugly gstreamer0.10-plugins-ugly-multiverse

give your user password when requested, you don't see nothing when you type it, then press enter.

You can also install other Medibuntu repository provided optional software http://packages.medibuntu.org/ :

sudo apt-get install skype
sudo apt-get install googleearth
sudo apt-get install acroread

Hope this helps
Mas eu ainda poderei atualizar minha lista de repositorios.
Acompanhe:

#gedit /etc/apt/sources.list

deb http://br.archive.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse
deb-src http://bger.archive.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse

deb http://br.archive.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu jaunty-security main restricted universe multiverse

# deb http://br.archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse
# deb-src http://br.archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse

# deb http://archive.canonical.com/ubuntu jaunty partner
# deb-src http://archive.canonical.com/ubuntu jaunty partner

*Retirar os comentarios se bem desejar..