首先安裝gstreamer的解碼器，gstreamer是gnome主推的多媒體平臺。默認沒有安裝完全，導致mp3等不能播放。

sudo apt-get install gstreamer-*

把所有的gstreamer的包安裝上。

編輯apt源

sudo vi /etc/apt/sources.list

＃添加一下的源

deb http://Ubuntu.cn99.com/ubuntu/ edgy main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ edgy-security main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ edgy-updates main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ edgy-PRoposed main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ edgy-backports main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ edgy main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ edgy-security main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ edgy-updates main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ edgy-proposed main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ edgy-backports main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu-cn/ edgy main restricted universe multiverse
 

然后依次輸入以下命令：

sudo apt-get update
sudo apt-get install totem-xine libxine1-ffmpeg libxine1-gnome libxine1-plugins libxine1
sudo apt-get install w32codecs