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Old May 7th, 2015, 11:55 AM   #1
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Join Date: May 2008
Location: Dayton, OH
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Scratching the DVD "protection" doesn't work

This is a new reply in response to:

Many people have asked how to keep customers from copy their DVD's.
One method that is suggested is pad your movie with a Black screen, and then "scratch" the outer edge of the DVD tracks that only contain your black screen
The theory is that a DVD player will faithfully play your movie from the inner track zero to the end of the movie,
but that a DVD ripper program will start copying at track zero, and then fail with a read-error when it encounters the "scratch"

So, I set-about to test the theory
1. Created a 10 minute movie, and padded it with 20 minutes of a black screen
2. Burned the movie to a clean DVD+R
3. I then took a small piece of sandpaper, and scratched the outer-tracks of the disk
4. I put the scratched disc into my DVD burner, and while I could hear the burner trying to read the disc, after about 90 seconds the Disc appeared in Windows explorer.
5. I used Imgburn to create an image of the scratched disk
6. Imgburn went about its business, until it encountered the scratches. It reported a read error, and eventually gave up with "Unrecoverable Read Error"
7. BUT, before it quit, it asked me if I still wanted to save the incomplete ISO file; I answered YES
8. I put a new blank DVD+R into the drive, and used Imgburn to burn the incomplete ISO file to the disc.
9. This disc then successfully played on both my Computer and a stand-alone DVD player.

So, it would appear that the scratching of the outer tracks is only a minor annoyance.
Additionally, If I were a paying customer, I would complain about the extra time it takes each time I try and play the movie I paid for
Vince Pachiano is offline   Reply With Quote
Old May 8th, 2015, 08:08 PM   #2
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Join Date: Feb 2009
Location: Brisbane, Australia
Posts: 3,036
Re: Scratching the DVD "protection" doesn't work

I've mainly stuck with making sure the program is long enough that it goes beyond the first layer on a dual layer disc. Most people won't think that they need a dual layer disc (or purchase those type of blanks) and hence it should defeat about 95% of casual copying attempts.

Andrew Smith is offline   Reply

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