Problem disc copy

[Fane]

I inserted my DVD, opened disk utility and made a disc copy of the DVD. Everything went smooth so i opened the dmg file. The file got extracted nicely, i took the real DVD out of my computer again.
Then i started DVD player and played the disc copy but after six seconds i got an error: Error -70025. It had something to do with a problem with the authentication code.

Does anyone have had this same problem en is there anyone who can help me?
Thanks

 

[funkychunkz]

Looks like some sort of protection. I'm guessing that you can't make a perfect copy for playing unless your copying program (in this case diskutility) reads every block from the disk. They maker of the disk may have implemented copy-protection, and you need either: a ripper that defeats code checking (MactheRipper is good) or a program that will make blovk for block copies, even the unusually sectors. I've heard of some utilities doing this to copy gaming console disks like the PlayStation platform.

 

[elfin buddy]

Specifically, what kind of DVD are you trying to copy? Commercial? Burned?