Need Help Converting Videos to MP4!?

I have a bunch of movies that I can't use because they are not in MP4 format, and every converter I have tried to use costs money, and I want a free one because I know there is probably one out there. I used avs4you but it kept putting things on the screen of my movies. I would really appreciate if someone gave... show more I have a bunch of movies that I can't use because they are not in MP4 format, and every converter I have tried to use costs money, and I want a free one because I know there is probably one out there. I used avs4you but it kept putting things on the screen of my movies. I would really appreciate if someone gave me the URL for a really good one, and 10 points for the best answer. Thanks in advance!
Update: The Ultimate one only gave me 3 min ):
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