Comment 8 for bug 858213

Ok, it works for me now

puhhh :-)

Found the solution in this thread https://bbs.archlinux.org/viewtopic.php?pid=951463#p951463

sudo ln -s /usr/lib/gstreamer-0.10/libgstisomp4.so /usr/lib/gstreamer-0.10/libgstqtdemux.so

et voilà!

I upgraded from Ubuntu 11.04 to 11.10 on two machines, but only one machine was causing troubles with minitube. And in addition, minitubes works out-of-the-box in a 11.10 LiveSystem. Something must have been screwed up on my second machine...