root@david-desktop:~# sudo apt-get install libmad0 libxine-extracodecs
Reading package lists... Done
Building dependency tree... Done
Package libxine-extracodecs is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package libxine-extracodecs has no installation candidate
root@david-desktop:~#