Yes, you can install ubuntustudio directly from DVD (it doesnt fit inside a CD) or just install additional packages from your current ubuntu installation.
Originally Posted by barna
For example, for the ubuntustudio "basic" desktop:
or just search in the synaptic for a complete list
sudo aptitude install ubuntustudio-desktop
Maybe this will help: http://www.medibuntu.org/
Another question is about ffmpeg: some time ago I had a video file, which I wanted to convert using ffmpeg, but the support of this format was not compiled into that version of ffmpeg, which was available in the ubuntu repository. So I had to download the source, reconfigure, recompile, and voila. However, this is cumbersome. SuSE has for example an extra repository, packman, where alternative versions of these multimedia software are available, with support for much more formats compiled in. Is something similar available in ubuntu? Or the only choice is to recompile everything from source, if I want more than the 'officially decided' features?