Roxio VidoeWave Movie Creator



I am using Roxio vidoewave movie creator. I have made an mpeg file that 2.9GB but when I try to make the DVD it tells me that it takes 4.5GB on the DVD and that the disk image file is greater than 4GB and it won’t proceed. The movie is only 52 mins long so why does it take 4.5GB on the DVD (don’t they store 2 hrs of movie?). Does splitting my movie into 2 chapters help?