You can get MPlayer via Subversion. Issue the following command to get the latest sources:
root@server[] cd /usr/local/src
svn checkout svn://svn.mplayerhq.hu/mplayer/trunk mplayer
root@server[] svn update
root@server[] cd mplayer
root@server[]./configure
root@server[] make
root@server[] make install
Done
You can check the path of mplayer by using the command
root@server [ ] which mplayer
/usr/local/bin/mplayer
Done