Get latest version from here: http://sourceforge.net/project/showfiles.php?group_id=205330&package_id=253281
cd /usr/src
wget http://internap.dl.sourceforge.net/sourceforge/ffmpeginstall/ffmpeginstall.2.1.7.tar.gz
tar xvfz ffmpeginstall.2.1.7.tar.gz
cd ffmpeginstall.2.1.7
sh install.sh