DVD-Audiobahn

• How is this news? - chriscmore 12:44:19 07/12/05 (2)
  In Reply to: DVD-Audio Copy Protection Defeated posted by rodpaine on July 7, 2005 at 03:29:44:

  From searching (DAD + ripping) asylum posts, I went to http://www.dvdtox.com/dvdaudioripper.htm
  and their program works super easy. I've only ripped 2-channel DADs into WAV files so I can play them anywhere in my house and car. How is this new development newsworthy on ripping of DVD-A? Is it unique to do MCH? (haven't tried that - only interested in utility of 2CH) Will I soon find out that dvd audio ripper will not work on DVD-A discs? Is this new software somehow more eeeville? Should my new hope of increased DVD-A usefulness now get crushed back into my previous "what a crappy format" position?

  Cheers,
  Chris

  
  
  
  

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  • Here's how . . . - Martin419 14:08:54 07/12/05 (1)
    In Reply to: How is this news? posted by chriscmore on July 12, 2005 at 12:44:19:

    Well it seems that the program which you refer to rips from DVD-V "chapters" not from encrypted DVD Audio "AOB" files.
    
    

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    • Yeah, a partial solution... - chriscmore 18:00:25 07/13/05 (0)
      In Reply to: Here's how . . . posted by Martin419 on July 12, 2005 at 14:08:54:

      While dvd audio extractor works like a charm for DAD files, it only pulls the DTS or DD tracks off of DVD-A discs. Still, I created 44.1kHz wav files, and made CDs for the car and WMAL files for streaming throughout the house. I'll try that new program, but it seems the "news" boils down to copy-ability AND the high-rez MLP tracks. But that's not that big a deal for me, for car, streaming, and exercise use. I'm just glad that I found utility out of the limited DVD-A discs I own.

      If this would have been easier, I would have bought more DVD-As. As the record industry wants the format, 3/4 of my family doesn't benefit in the 5 out of 6 listening environments. Nice value, music industry idiots. You deserve to shrink.

      Conditionally yours,
      Chris
      
      
      

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• Strictly speaking, this is NOT TRUE - Christine Tham 01:07:38 07/09/05 (1)
  In Reply to: DVD-Audio Copy Protection Defeated posted by rodpaine on July 7, 2005 at 03:29:44:

  based on my inspection of the programs, CPPM has NOT been compromised and the keys have not been exposed.

  In hindsight, the technique used is a relatively simple one and any university student could in time have done something similar.

  WinDVD has a modular architecture for media decoding and playback that's loosely based on DirectShow. one module does the decrypting, and passes the decrypted data to another module which does the MLP decoding, onto another module that does the audio playback (and downsample if necessary).

  As far as I can tell, what the author did is insert a dummy "filter" between the modules that taps the data and write it out to the hard disk. The hardest part in the whole exercise was reverse-engineering WinDVD's proprietary APIs.

  Presumably, future versions of WinDVD can be remedied by detecting unauthorised filters and preventing them from being inserted into the playback chain. Unfortunately, that does not fix the problem for all the people who have the current version installed.

  It's an interesting lesson for a few people, I'm sure.
  
  

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  • So "defeated" is the wrong word. The correct term is "bypassed" . . . - Martin419 05:33:57 07/09/05 (0)
    In Reply to: Strictly speaking, this is NOT TRUE posted by Christine Tham on July 9, 2005 at 01:07:38:

    . . . and that's precisely what most folks would do already: i.e. just record from the analog outputs (or take the easier & quicker DVD-V Dolby route etc.). That gives good enough sound quality for most people.

    Moreover, they wouldn't understand what all this latest fuss is about.

    What I think will happen now, is the following:-

    1. WinDVD (up to version 7) will have the CPPM keys revoked (for future DVD-A releases);
    2. Licensed WinDVD users will be offered a patch upgrade embedded with a new set of keys to enable them to play future CPPM-protected DVD-A material;
    3. The upgrade will engineer-out the ability for WinDVD to be vulnerable to a "spy hack" intercept of raw hirez data between modules;
    4. The RIAA lawyers will "seek-out-and-destroy" any web-server/operators/individuals etc. which attempt to distribute the existing hack programs.

    Anyway, even if they do, its hardly likely that your typical ‘Viktor Bootlegski’ in downtown Bratislava is actually going to even bother setting up a market stall with pirate hirez DVDs, since it wouldn’t attract any interest amongst the average folks there.
    
    
    

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• Re: DVD-Audio Copy Protection Defeated - hugo.rosa@megamail.pt 03:52:38 07/08/05 (2)
  In Reply to: DVD-Audio Copy Protection Defeated posted by rodpaine on July 7, 2005 at 03:29:44:

  Well, in my opinion bad news for us High Resolution Audio playback.

  Why is that?

  Well, now many studios and recording industry "brands" will think VERY carfully in putting high res. content on both DVD-Audio or even Dual Discs.
  I know that regarding water marks for Verance protection scheme is still active but still you can save the audio content on your hard disc!

  Why did i invest my money on DVD Audio ... Bad news.

  Hugo Rosa
  
  

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  • Personally, this is a good thing... - crazyhayashi 09:30:51 07/08/05 (1)
    In Reply to: Re: DVD-Audio Copy Protection Defeated posted by hugo.rosa@megamail.pt on July 8, 2005 at 03:52:38:

    I've been wanting a way to rip the audio off of DVD-A for a while now. Now I can resample it and put it on an iPod, and I don't have to buy CD versions of albums on DVD-A anymore! Plus, I've been needing some way to playback/access the DVD-A content, because I can't afford a DVD-A player yet (I have an SACD player).
    
    

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    • http://www.dvdtox.com/dvdaudioripper.htm [nt] - chriscmore 12:46:19 07/12/05 (0)
      In Reply to: Personally, this is a good thing... posted by crazyhayashi on July 8, 2005 at 09:30:51:

      .
      
      

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