Date: Fri, 20 Apr 2001 09:53:21 -0400 From: "Andresen,Jason R." <jandrese@mitre.org> To: Brooks Davis <brooks@one-eyed-alien.net> Cc: Jamie Bowden <ragnar@sysabend.org>, freebsd-multimedia@FreeBSD.ORG Subject: Re: DVD drive. Message-ID: <3AE03F51.B3CC6787@mitre.org> References: <20010419135144.A27643@Odin.AC.HMC.Edu> <Pine.BSF.4.10.10104191356190.84385-100000@moo.sysabend.org> <20010419140923.A2284@Odin.AC.HMC.Edu>
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Brooks Davis wrote: > > [Trimmed -mobile as irrelavent.] > > On Thu, Apr 19, 2001 at 01:59:38PM -0700, Jamie Bowden wrote: > > Maybe I'm just confused. I'm trying to use Charles Hannum's efdtt util to > > access the file. > > > > >From the source: > > > > /* Usage is: cat title-key scrambled.vob | efdtt >clear.vob */ > > > > So what's going on here, is that I need something else just to read the > > scrambled vob off the disc, beforce efdtt can unscramble it? I can only > > assume the title key the the long string in the disc.id file. If someone > > has an actual reference on how to use this, I'd really appreciate a > > pointer. > > Yup, you're confused. ;-) There's hardware locking in the driver you > must circumvent. That's what css-auth is for. I believe you just need > to use css-auth to get the data off the disk and then any player will > play it. The title key is actually encoded on the disk using player > keys (many of which are unassigned). The player uses it's key to decode > the title key which is used by code like efdtt to decode the stream into > an MPEG2 stream. > > One of the things that the MPAA was pissed about in decss is that it > stole a player key from XING (who violated their license agreement with > the DVD-CCA by not hiding the key at all). It turns out that you don't > need a player key though because the crypto used is so totally lame that > you can just break it in a couple of minutes. Couple of minutes? I've never seen it take more than 5 seconds to crack on my machine. Not that it means much, I still can't get DVDs to play reliably on my machine. The MPEG2 tracks are fine, but without the IFOs (for the always track switching subtitles!) it just doesn't work. Worse I've never been able to stream directly from the DVD, I always have to dump the huge vobs onto my HD and decrypt them first. -- _ _ _ ___ ____ ___ ______________________________________ / \/ \ | ||_ _|| _ \|___| | Jason Andresen -- jandrese@mitre.org / /\/\ \ | | | | | |/ /|_|_ | Views expressed may not reflect those /_/ \_\|_| |_| |_|\_\|___| | of the Mitre Corporation. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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