I have exprted video using Movie Edit Pro Plus 2013 by Mp4 so that it can fit onto a 4.7 gb dvd then after exporting that video size come to 4.7 gig but when i want to burn the size shows 9874 mb on 4489 mb meaning it doesnt and it wont fit onto the disk can you help on getting it to fit onto the disk i am using Windows 8 pro