Ubuntu 7的源里缺少w32codecs，想看rmvb麻煩，所以找到下面的源

Installing libdvdcss2 and w32 video codecs in Ubuntu Feisty Fawn

Support for WMV, RealMedia and other formats has been bundled into the w32codecs package. This package is not available from the Ubuntu repositories due to licensing and legal restrictions.

Edit /etc/apt/sources.list file and enter the following repositories save and exit the file

sudo gedit /etc/apt/sources.list

For Ubuntu Feisty Fawn Users

deb http://medibuntu.sos-sts.com/repo/ feisty free non-free

deb-src http://medibuntu.sos-sts.com/repo/ feisty free non-free

Now you need to copy the key using the following command

wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add -

Update the source list using the following command

sudo apt-get update

Install Codecs using the following command

sudo apt-get install w32codecs libdvdcss2

Using above download locations you can install most of the mutimedia codecs for ubuntu.

sudo apt-get update

這樣就可以裝上w32codecs支持所有媒體。