Re: Ripping DVDs ... and MythTV

["Jarod Wilson" <user=74@nabble.blu.org>]

On Nov 23, 2007, at 12:24, Kristian Erik Hermansen wrote: 

> I even went so far as to inspect the libdvdread3 code about five 
> minutes ago to see how it is all implemented.  After inspecting the 
> files, it really seems to indicate that there are in fact two stages. 
> 
> 1) CSS authentication (to unlock sectors for read accessibility) 
> 2) CSS decrytion (to decrypt the titles, chapters, etc) 

I swear I wasn't nuts, I've definitely dd'd commercial dvds with css   
on 'em in the past... So I tossed a few into my myth box and started   
poking too. I believe we were both partially correct and both   
partially wrong. :) 

You're correct in that css does lock sectors of the disk, so if you   
simply insert a dvd and try to dd, it'll at some point. However, if   
you insert a dvd, fire up something like xine w/libdvdcss in place,   
quit it, *then* do the dd, all is well, as those sectors have been   
unlocked. 

I've verified this by dd'ing a few of the commercial dvds in my   
collection -- prior to xine'ing them, dd fails at some random point,   
post-xine, they dd just fine. Thus I'm not crazy, and neither are   
you. :) 

-- 
Jarod Wilson 
[hidden email] 


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