DVD –> tape
DVDs are protected by a 40-bit encryption in most cases to stop any type of copying, but we all know that it doesn’t take long to break it. There is a free program called DVD Decrypter. Give that a try.
Tape –> DVD
Tapes are usually macro protected so that when it is passed to anything that is capable of doing recording, the image will end up scrambled when u try to record it. I don’t want to go into details but Google would be a good place to start looking for patches.