Most copy protection mechanisms involve decrypting the digital stream of data coming off the DVD, and with the demise of DVD Decryptor this may become increasingly difficult to make a backup of your own legal discs. When HD DVD / Blu Ray comes out, I'm sure it will be even more difficult.
I'm not sure if anyone has thought of an alternative:
1) Write a filter ffdshow-like filter that instead of massaging the image actually outputs an equivialent video image data to disk in realtime. The de-encryption is already done by the DVD drive / media player and this could be stored as unprotocted video on the hard drive.
I'm no expert, but I guess ffdshow actually decodes the data itself. So instead of that isn't there a way to intercept calls to the video driver and capture the bitmaps written to the display card to disk as well ?
2) A hardware device that plugs into the DVI-out port and captures the digital image back into the PC writing to hard disc an unprotected video file.
I'm sure this has been thought of before, but I havent seen any applications do this. What's the catch ? I suppose speed, but it would be better than nonthing.
Disclaimer: I for one dont condone piracy....every video / music file on my PC is a legal copy of media I have bought, but I don't see why I should be prevented of making a copy of something I already own.