What Shannon and Nefarious said, plus -- if you are copying more than movie only, why not try some movie only. That will reduce the amount of compression needed. High compression is a contributor to pixelizing. The reason it's coming late in your movies is that burns are from the inside out on the disk. Out near the edge, errors, imperfections and anything else that can cause problems is magnified. Also, some players tend to pixelize more than others.