Originally Posted by notinmybackyard

I've got a large MP4 file... 17gig for 10mins of footage

I want to keep its definition and quality but I want to reduce its size to hopefully less than 5gig.

Anyone got any recommendations for a program that I can use?

Also, I'm using the latest version of Sony Vegas. So if there's a trick that I might be missing I'll be grateful to know about it.