Brett Mahar <brett.mahar@gmail.com> writes: > deb http://ftp.au.debian.org/debian/dists/lenny/ main contrib non-free > deb http://ftp.de.debian.org/debian/dists/lenny/ main contrib non-free These are wrong. Try with a sources.list that only has deb http://ftp.de.debian.org/debian/ lenny main deb http://security.debian.org/ lenny/updates main and nothing else. Then post the output of apt-get update and apt-get install gstreamer-tools.