Ubuntu Video converter
If you don’t like the command line mencoder to do your video converting, there is the excellent winff!
Winff can be downloaded here.
They have the .deb and .rpm packages so installing them is as simple as double clicking the package.
I used it to encode an .ogg video to .avi and it did the trick and it was quite fast.
It’s no looker but it gets the job done and is user friendly.