Need Cinavia protected audio sample

[Videogamer555]

I am interested in testing out some of my own techniques for attempting to remove a Cinavia audio watermark. For this though, I'll need an audio track ripped from a DVD that is known to be protected by this method. When I say audio track, I mean exactly that, the actual AC3 audio stream (as demultiplexed from the VOB file using a tool such as FFMPEG). I don't want to waste a lot of my harddrive space with a VOB file, which also contains video (and certainly not an entire ISO disk image).

If someone can do this, and then post the AC3 audio file here, it would be great.


Also what would be great is a free player software I can use that will be able to read the Cinavia watermark, so I don't have to test each edited version of the audio file by burning a new DVD disk with it and putting it in a physical hardware player that recognizes Cinavia watermarks (such as the Sony PS3 or PS4). That just wastes a lot of disks, and disks cost money.

[HWK]

When it comes to players, there is no free players which can detect cinavia. However if you want you can use powerdvd, total media theatre and windvd.

All of them of capable of detecting signal and mute audio.

[Videogamer555]

When it comes to players, there is no free players which can detect cinavia. However if you want you can use powerdvd, total media theatre and windvd.

All of them of capable of detecting signal and mute audio.


Two things.

1) Do you happen to have a copy of some audio that has a Cinavia watermark?


2) Actually it should be possible to write free software that detects it. One company has already reverse engineered Cinavia, and is able to detect and remove it. It actually uses the same algorithm used by licensed Cinavia-capable players, due to them having reverse engineered this algorithm, and when it detects Cinavia-watermark it deletes those segments of audio. Unfortunately only deletes these segments (rather than subtracting the Cinavia waveform from those segments). How do I know it was reverse engineered? Cinavia would never license its algorithm to a company bent on defeating it. That's how I know that the only way they could have a copy of the algorithm is if they managed to reverse engineer it. How do I know they use the actual algorithm? It says so on the Wikipedia article on Cinavia. Here's the link:
http://en.wikipedia.org/wiki/Cinavia#History

And here's the important text in that section:
The DVD-Ranger CinEx beta software synchronises and detects the Cinavia signal in the same way as a consumer Cinavia detection routine; these identified parts of the audio stream are permanently removed, removing the Cinavia signal. Post-processing can be used to try to "fill-in" the audible gaps created

If it is possible for a software company to reverse engineer it, and then use it in a product they are selling, it is equally possible for a person who has a freeware or open-source software to reverse engineer it, and then include it in their software that you DON'T have to pay for. Too bad that currently no free software is able to decode Cinavia. Do you happen to be aware of any free software project (that just has not yet been finished) who's goal is to accomplish this? It would be great if it could actually have a status-bar that showed the bits as they were decoded from the audio stream, so you could know exactly where the data was being hidden, so you could then use your own audio editor to try to carefully remove these encoded bits without strongly damaging the audio.

And here's some technical details provided by the makers of DVD-Ranger CinEx software, on how the Cinavia algorithm works.
http://www.dvd2hd.com/_dl/cinex_wp_release1.pdf

[HWK]

I can try to arrange sample, however you will need 30 minute at least. Cinavia only tiggers after 20 min and 30 is safe bet.

If not to much trouble I can provide bluray sample and you can convert if necessary.

Sent from my SM-G900W8 using Tapatalk

[Ghitulescu]

Videogamer555

You are misinformed on thebasics. Since I presume youhave no incentive to read those hundred pages on the cinavia thread :) I summarised it for you:

- cinavia is a detection algorithm not a removal one. Like a software to detect false money, not to make good money of them
- therefore the algorithms are public (the concept is described there)
- since it's a detection algorithm, a software / Hardware can safely choose not to call that subroutine.

and cinavia detection is required for all players, the free ones simply cannot pay the licence fees and are therefore illegal. Most free software cannot play blurays anyway. They can play MKV, M2TS and stuff.