Hi frfldpizza and welcome to cdfreaks,
I suspect you have some issue with your settings. Platinum will compress to a dvd5 if configured correctly, regardless of the original file size. (You can compress a file to the point of being worthless).
Be certain the target = dvd5, bottom left of screen…just to the left of “Quality”.
In [B]Common Settings[/B] >[B] Write[/B],
be certain to have the target size for dvd5 no greater than 4472 MB, a little less, especially for less than good quality blank media. Mine is set at 4460 MB and I use TY and Verbatim media
Check the file size of the rip on your hdd…it should be the same size as your “target size”.