How Can I edit a video's format?

I need to change my video's format from .VOB to another format. Does anyone know how to do it? Or know fo a free video editing software that I can use. thanks so muchHow Can I edit a video's format?For video editing, Final Cut is the best.
How Can I edit a video's format?
Go to doom9.net. You can learn how to do just about anything with audio and video there. And yea there are a lot of programs that can do what you want to do.