You won't get a 6GB file onto a 4.7 GB DVD. You'll have to split the file and burn it onto two DVDs.
But I'm curious,......which movie turns out to be 6GB??
Don't post the name here, PM me instead.
Besides, if you got the 6GB after converting it with "Super-High-Best" quality then of course it can be that the file size turns out to be that huge.....
Edit:
@Grandpa,......wow, I didn't know that......well, might be because I never had such a problem yet.....