I have dvds that I recorded on panasonic hdd/dvd recorder. The dvds are labeled as 4.7gb dvds. However, after finalizing them they appear as having approximately 12gb files(8hrs ep mode). I was hoping to be able to trim these dvds and reburn them to a fresh 4.7gb disc. Is there a way that I can do this without having to compress them? It just doesn’t seem like it makes sense that one should have to compress(time intensive task) to fit the same amount of material(less trimmed) back onto the same type disc(4.7gb) that it was recorded on. Furthermore, what in the world is going on here that over 12gb of data appears on a 4.7gb disc?