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View Full Version : CPRM Disc Won't Play In Anything!


alicizmar
8th February 2008, 09:58
And when I say anything I mean anything.
I recently got a DVD from a friend. It's a digital program and it's a flipping VR disc with CPRM on it. Standalones won't touch it, not even the DVD recorder which supports DVD-RAM.
I had access to four computers at the time, two with drives that support CPRM (according to Nero Infotool) and two that don't.
Here's the crazy madness. On the drives that do not support CPRM, you can see the files on the disc (DVD_RTAV, with the Manager IFO and VRO inside). They can't play the disc, however, because the drives don't support CPRM and can't unlock it. And playing the disc gets you a green screen at best (even when the VRO is ripped to hard drive and played from there), and a hanging player trying to access the CPRM at worst.
On the OTHER hand, the disc shows as a blank in the drives that support CPRM. What I read here recently was though this is the case, the player is supposed to see the disc and decrypt it an play it back properly. No such luck. Upgraded and tried the latest versions of both PowerDVD and WinDVD. Also had the latest Nero Showtime on one of them. NOTHING will open the disc, citing it doesn't see one in the drive.
Is this a sign the disc is actually unfinalized, though the non-CPRM drives see the files on it? I heard you can use DVD Decrypter to finalize it, but thanks to this CPRM madness this is probably the only copy I'll have and I don't want to risk turning it into a coaster and finding a solution that would've worked afterward.
I also found a small command line program here (cpxm) that was supposed to be able to strip the junk off the file. And on the non-CPRM drives, it "decrypts" but the file decrypted also doesn't work, and on drives with CPRM it can't find the disc, either.
So I ask kindly, does anyone have any idea what I should do with this thing besides use it as a frisbee?

CruNcher
8th February 2008, 10:01
How often again the Disc can only be played back on the Device that recorded it, so only your friend can play it back and only your friend can ask the content provider to give him a license for other devices to be able to play it back. Don't be foolish this site is about Fair Use not Piracy and Neuron2 will close this thread in an instant. I know that this question will come up alot of times more here on Doom9 but breaking CPRM is Piracy not Fair Use anymore it is completly different to AACS or CSS it's a whole new thing (not technicaly but in the usage Scenario) that interacts between your Hardware and Devices done to protect content better and also to avoid it being shared between different parties without getting a license for it.
Yes you can say it's the Fair Use solution for Content Providers (TV Stations,IPTV) to protect their content from being shared and yes it's a DRM system and it's gonna be in every drive that will be developed in the future (it's in the Hardware/Firmware/Software).

There are 2 Variants CPPM and CPRM
CPPM = Content Protection for Pre-Recoreded Media
CPRM = Content Protection for Recordable Media

and then their is the Framework
CPSA = Content Protection System Architecture (which is all the stuff combined CPPM,CPRM,CPCM,HDCP,DTCP,CMI,CSS,AACS)

both are interacting with each other so you can make a Copy of a DVD but only play it back on the Device you made the Copy with, so if you copy a DVD Movie in the future you can only play that Copy on the Device you made that copy with easy to understand isn't it. Same for example your Tivo, IPTV or Sat Recordings you can only play them on your Device and maybe are allowed to stream them to other CPRM enabled devices (in your house via DTCP-IP) but the protection in this system is as this content will never left your house or Mobile Devices, because it won't be able to be played back outside of it or the Devices you have no license for.
But not all Devices are CPRM and CPPM ready yet but you can be sure that it is in mass production on virtualy every device as we speak and no Media devices without supporting it will be manufactured in the future anymore (DVD drives,Setopboxes,Mobile Devices).

Breaking this would have nothing todo anymore with the term "Fair Use" but would be Piracy (as you as the content licensee (user) are allowed to make as much copies as you want, but they will only playback for you no one else except the Content Owner gives you the permission to share it outside of your Devices).

Sony calls it "Managed Copy" "Managed Recording"

http://www.4centity.com/tech/cprm/

this will protect the content in your homes http://www.dtcp.com/dtcpfaq.htm

alicizmar
3rd April 2008, 17:47
Well it turns out the disc plays in her computers just fine. So the disc does NOT require playback on the device that recorded it, or this (I don't think, anyway) wouldn't be the case.
So I can't even watch it without breaking the law? That's pretty messed up, IMO.

frenchglen
3rd April 2008, 20:10
If it's CPRM-protected, have you tried removing it by copying to ISO with DVDFab HD decrypter? I'm not sure if it's possible, but it should just copy the disc image. And it's free program. And then burn ISO with Imgburn.

I have never heard of such an anti-consumer horror of a system as this! (apart from watermarking)

Turtleggjp
4th April 2008, 06:36
I have never heard of such an anti-consumer horror of a system as this! (apart from watermarking)

This is why I will probably never buy a Tivo or any other DVR (including standalone DVD recorders). Basically, the recordings you make are out of your control, and thus worthless to me. To most people though, they are great, which is why they are still around today.

sakman
5th April 2008, 03:51
This is why I will probably never buy a Tivo or any other DVR (including standalone DVD recorders). Basically, the recordings you make are out of your control, and thus worthless to me. To most people though, they are great, which is why they are still around today.

You can decode Tivo recordings and remove the restrictions.