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Cinavia copy protection broken with opensource software

Posted 05 July 2013 16:50 CET by Jan Willem Aldershoff

Myce user Macrovision3500 reports on our forum that the Cinavia copy protection is broken by using freely available and opensource software. Unfortunately the method has a drawback, it degrades the audio quality of the movie. By using the opensource audio editor Audacity with settings as stated here you can create an audio track from which the Cinavia protection is removed.

Macrovision3500 has tested the solution with his Playstation 3 with the latest firmware and confirms it works. While the audio quality might not be acceptable for many users, this is a great proof of concept. The Cinavia protection works by adding a watermark to the audio track of movie. Therefor many belief it should be possible to remove the protection by making changes to the audio track.

It seems that this technique indeed breaks the Cinavia protection. The method can probably be fine-tuned and might become an excellent method to enable users to make backups of Cinavia protected discs.

There are other ways of backing up discs that are protected by Cinavia. With the paid applications AnyDVD and DVDFab it’s possible but they require frequent updates. Also the developers of DVDRanger claim to have a working solution, unfortunately it has not been released yet.

Kerry56
Administrator
Posted on: 05 Jul 13 15:14
Degrades the audio quality? There's an understatement!
0 Agree

alan1476
Senior Moderator, Software Editor and Head of Promotions
Posted on: 05 Jul 13 15:47
I don't have a Cinavia DVD Player so I cannot check but I would love to hear from some others.
0 Agree

Bakst0ne
MyCE Junior Member
Posted on: 05 Jul 13 16:57
Great job, maybe we can all find a way to make the audio better while the protection remains gone!!!
0 Agree

CDan
MyCE Resident
Posted on: 05 Jul 13 18:14
Nothing "removes" the Cinavia watermark. What this does is completely decimate the dynamic range and noise floor, rendering the Cinavia watermark non-functional. Its by no means anything you should be calling a breakthrough, the protection has not been broken. This is a sledgehammer for killing mosquitoes.
0 Agree

TSJnachos117
MyCE Senior Member
Posted on: 06 Jul 13 16:28
I have an even better Idea on how to beat cinivia... don't buy anything with this protection in the first place. Perhaps that will send corporate Hollywood a message: that we don't like being unable to make backup copies of our legally acquired movies.
0 Agree

Wombler
Administrator & Reviewer
Posted on: 06 Jul 13 20:16
Seems to me like it's basically a less sophisticated and therefore less effective version of the method used in the samples posted by DVDRangerTester.


Wombler
0 Agree

r_saotome
MyCE Senior Member
Posted on: 07 Jul 13 09:31
I guess if you wanted to keep the audio quality in tact, you could remux the bluray, copy it to a HD & hook that HD to a media playing device (eg. WD TV Media Player).

Been working great so far, keeps all my bluray's from being lost, ruined, broken, written on, slobbered on, etc when the relatives visit with the younglings.
0 Agree

alan1476
Senior Moderator, Software Editor and Head of Promotions
Posted on: 07 Jul 13 12:01
I don't know how much of a price tag you can put on " your personal time" but I for one am not going to spend one minute on this Cinavia crap, I just bought a great Oppo, albeit an older version that will not detect Cinavia so I can play and back up any movies I want with no problems. Cinavia is a protection put on a dying investment (DVDs) , in a year or so everything will be Streaming for .99 a movie and you can watch whenever and wherever you please. So this whole Cinavia debacle is mute as far as I am concerned.
0 Agree

cholla
MyCE Resident
Posted on: 07 Jul 13 13:38
Streaming may be the way things go but I will probably keep using DVDs.
As well as conversions to other formats stored on a harddrive.
I still don't plan to but anything blu-ray unless I have to.
So far I have just a regular single dock that works well with my main TV.
There is a small loading between .vobs if I just leave a DVD rip as is.
I may eventually get something like the WD Media player if I ever need to or rig up a HTPC .
My problem with streaming is bandwidth . I don't have enough . I could pay more & get just barely enough . (If I actually get the advertised top speed & not the usual below in the "up to" speed .I have DSL .
Still if enough connections stream with cable internet it is my understanding that streaming might not work as well for it either. If everyone goes to streaming video that may be a problem.
If the internet ever becomes reasonably priced for high speed & everyone can get that the streaming may replace DVDs or hard drive stored media.
0 Agree

Wombler
Administrator & Reviewer
Posted on: 07 Jul 13 18:53
I think the key thing is circumventing the detection routines rather than removing Cinavia.

We already know it's possible to subtly alter the audio to achieve this as the post by DVDRangerTester confirms so perhaps someone will use this to pick up on the theories behind the Cinavia plugin and develop their own version.


Wombler
0 Agree

CDan
MyCE Resident
Posted on: 07 Jul 13 20:05
Quote:
Originally Posted by Wombler
I think the key thing is circumventing the detection routines rather than removing Cinavia.

We already know it's possible to subtly alter the audio to achieve this as the post by DVDRangerTester confirms so perhaps someone will use this to pick up on the theories behind the Cinavia plugin and develop their own version.


Wombler
There's a lack of understanding of how Cinavia works, and what the watermark actually is. You can't remove the watermark, it just can't be done. What you CAN do is mask it or render it non-functional by altering the S/N ratios in the audio. It's not subtle at all, it decimates the audio in several ways and certainly renders any benefits from lossless BD audio useless.

An analogy would be to remove a video watermark by degrading the video to the point that the watermark is no longer visible. Why would you even want to do that?
0 Agree

Wombler
Administrator & Reviewer
Posted on: 07 Jul 13 21:22
Quote:
Originally Posted by CDan
There's a lack of understanding of how Cinavia works, and what the watermark actually is. You can't remove the watermark, it just can't be done. What you CAN do is mask it or render it non-functional by altering the S/N ratios in the audio. It's not subtle at all, it decimates the audio in several ways and certainly renders any benefits from lossless BD audio useless.

An analogy would be to remove a video watermark by degrading the video to the point that the watermark is no longer visible. Why would you even want to do that?
Exactly and I reckon it's impossible to remove without substantially degrading the audio.

Adjusting the signal to noise ratios isn't the answer either because, as you say, it decimates the audio.

Did you watch the clips uploaded by DVDRangerTester though as I didn't notice any problems with audio quality?

The secret is in the difference between these two clips.


Wombler
0 Agree

ricoman
MyCE Resident
Posted on: 07 Jul 13 21:59
I'm with you Alan1476, I have 2 older Pannys that are not encumber by Cinavia. I'm afraid to update the FW, but so far there has been no need to.
0 Agree

ivid
MyCE Resident
Posted on: 08 Jul 13 05:09
It sill think "Cinavia" sounds like some nasty STD.
0 Agree

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