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15th April 2012, 23:12 | #1621 | Link |
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A thought, dropping the sample rate from 48kHz to 32kHz changes the Nyquist frequency from 24kHz to 16kHz. If the process does not low pass the source then aliasing may occur. A 16.5kHz signal will appear as a 15.5Khz signal. I imagine special signals with significant spectral elements around the 16kHz range are going to be quite spoilt.
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16th April 2012, 02:10 | #1622 | Link |
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A point of information - One of the four titles stated by "MRCOCOset" to have generated Cinavia messages, the "Hugo" ("Hugo and his Invention"?) Blu-ray disc, is NOT noted to have Cinavia:
http://en.wikipedia.org/wiki/Cinavia |
16th April 2012, 06:40 | #1625 | Link |
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Interesting. I wonder if his listing "Hugo" as a sample of cinavia, was an oopsy LOL! Perhaps Hugo was simply on his mind when he was listing the titles he tested
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16th April 2012, 08:51 | #1626 | Link |
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Just to quickly note - That Wikipedia page on which movies contain Cinavia is not completely accurate, for example I can tell you that the DVD releases of 'The Social Network' and 'The Adventure of Tintin' DO NOT contain Cinavia. If you have these DVDs you can check for yourself. Neither one has the required AACS folder on the disk. People post inaccurate things on Wikipedia all the time, sigh...
I find that the DVDFab list here: http://blog.dvdfab.com/cinavia-protection.html Is more accurate (100% so, I believe) is updated regularly, and includes more info including Studio name & etc.... -xenex EDIT: I am not affiliated with DVDFab in any way, I just find that list a MUCH better source of info on what releases contain Cinavia. |
16th April 2012, 18:49 | #1627 | Link |
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I would like to ask people who own Playstation 3 (with latest firmware) or BD-player with cinavia enabled firmware to test these samples.
DO NOT REWIND WHILE PLAYING! ORIGINAL AC3 file (provided by user watermarking from videohelp.com) http://paste2.org/p/1981582 Attack method: Resampling http://dl.dropbox.com/u/27599202/Cin...pling_32khz.7z http://dl.dropbox.com/u/27599202/Cin...pling_40khz.7z http://dl.dropbox.com/u/27599202/Cin...pling_44khz.7z Attack method: Low Pass Filter 16khz file will be uploaded tomorrow Attack method: HE-AAC 320kbps file will be uploaded tomorrow
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16th April 2012, 18:59 | #1628 | Link |
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Grabbing the 32 and 40 samples now. I don't believe 44 will make a difference as I resampled when i made my test file that I use to test players with. My personal feeling is that resampling will not solve this particular issue. Will have the results of these files in a while.
EDIT: I can't get my PS3 to play that file and don't have a lot of time to mess with it right now. Hopefully someone else can look at it.
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16th April 2012, 20:42 | #1629 | Link |
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@Atak_Snajpera ps3 don't have support for he-aac...
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16th April 2012, 20:44 | #1630 | Link |
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i meant original to he-aac and then to ac3.
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16th April 2012, 20:45 | #1631 | Link |
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I tried making an AVCHD out of the 32 sample and putting it on a memory stick but my PS3 is being stubborn about reading it. Oh wait....I may know why. Do they need to be in a video sub-folder on the ps3?
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16th April 2012, 20:49 | #1632 | Link |
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maybe multiavchd could help.
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16th April 2012, 20:52 | #1633 | Link |
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No, it was just what I said. The PS3 requires a VIDEO folder. Now I can play the file directly and/or the AVCHD I made. So it's running now. I'll see how it goes.
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17th April 2012, 06:17 | #1635 | Link |
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@xenex
Hi! 1) As I said in my earlier post, I was unable to find an indication ANYWHERE of a "Hugo" BD containing Cinavia protection - including the DVDFab listings 2) You state, "I can tell you that the DVD releases of 'The Social Network' and 'The Adventure of Tintin' DO NOT contain Cinavia. If you have these DVDs you can check for yourself. Neither one has the required AACS folder on the disk." You may or may not be correct. Also noted (by an asterisk) in the DVDFab listings is the fact that, although a U.S. release may contain Cinavia protection, releases for other regions by different studios (Warner, Universal, etc.) may not contain Cinavia. BTW - It appears that the source material used by "MRCOCOset" may be "cams" and/or other non-original, commercial discs - which might explain why his/her "Hugo" contains Cinavia protection...(Reference to this appears to have been deleted) Last edited by setarip_old; 17th April 2012 at 06:34. |
17th April 2012, 08:30 | #1636 | Link |
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setarip_old-
No disagreement from me. I also was unable to find any use of Cinavia on the "Hugo" movie, either BD or DVD. I believe as you do that poster "MRCOCOset" is talking about "camrip" files. That's a whole other issue than official BD or DVD releases. As for 'The Social Network' and 'The Adventure of Tintin' DVDs, mine do NOT have the required AACS folder. People in other regions are free to check their disks for the presence of such. I speak only for myself. I personally believe that only the seven DVD releases listed on the DVDFab list above contain Cinavia. And technically, I just don't see this re-sampling working to remove Cinavia. There are two aspects to any audio. The "Frequency Domain" - call it X, and the "Time Domain" - call it Y. Cinavia is primarily in Y. The "Time Domain." Short term, spread spectrum echoes. It's not just a "tone" or "frequency" to remove. It's tiny echoes over the entire audio spectrum. -xenex Last edited by xenex; 17th April 2012 at 08:35. |
17th April 2012, 13:10 | #1637 | Link |
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Somewhere tin tin contains cinavia because the samples posted are from a DVD copy of it...audio only of course. And the resampled version I grabbed and tested tripped cinavia message 3, which as we know only shows up on commercial discs. In any case I didn't believe resampling would work either as I did plenty of that on the losers. Changing formats, resampling, removing channels...none of that affects cinavia. Still it was easy enough to try.
Sent from my Xoom using Tapatalk 2
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17th April 2012, 15:37 | #1638 | Link |
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18th April 2012, 19:01 | #1639 | Link |
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Atak just a question did you removed the previous files or did dropbox ?
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21st April 2012, 12:54 | #1640 | Link | |
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Quote:
And if that dosen't work, we need to stop fooling around and build an app that will download a list of movies with a list of each and every Cinavia beep, and remove them from the audio. There are two ways we can do that, we can either analyze each track the whole time and find out if the beeps are systematic, if they are, we can choose to only include the original beep time code and the frequency of the beeps, to save time. Last edited by marcusj0015; 21st April 2012 at 12:58. |
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