回複：請教DVD刻錄的問題，謝謝。

http://www.videohelp.com/

use dvd decrypter to decode dvd to hard drive, then if original dvd is single layer you can directly burn to dvd+r or dvd-r, if dual layer you need to use dvd shrink to re-compress it to 4.7GB to burn on dvd+/-R.