There is actually this program called SUPER. Just go on Google type in SUPER.
It can convert almost any video file format, like MP4, 3GP,avi etc.
Your probably need mp4 or 3gp format.
I've heard about this thing, "DVDVideoSoft Free Studio,"; it can rip videos, and it's free. I've downloaded it, and unfortunately, it does not run properly under wine. So I suggest you try that out if http://www.vixy.net/ does not meet your standards.