Can anyone recommend a DVD format converter which runs under ubuntu 9.04? I need to convert a DivX format into a regular DVD, but converters for other formats would be helpful (to me and others) as well. Free software would be nice but non-free is okay too.
All of these should do the trick:
They are commonly included in the repos of all the major distros.
ffmpeg and mencoder are used as a backend by several linux apps, so you can either use some CLI ninja skills or do it via GUI as for example this one.
AFAIK, although VLC is best known in the form of GUI application you can also use it from command-line.
Once you are all set up with your files, you can then create a regular DVD to be played in domestic appliances with - amongst others - dvdauthor.
Finally there is a package called videotrans, which is a collection of scripts and tools for creating DVD's. Here's the project brief description:
Hope this helps!