[vlc] RPC2 drives and MacOS X

[Serge Cohen]

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Hi;

I'm trying to see "zone protected" DVD (css) on a RPC2 drive (limited 
number of zone changes). From the site of VLC I had the impression that 
VLC is able to do this, and indeed it looks to me it's pretty close but 
I don't manage to see the DVDs.


To get better understanding of what's wrong I've started VLC from the 
command line, setting env. variable to have maximum error logging from 
libdvdcss. Here is what it gives:

 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
[vlc.app/Contents/MacOS] cohen% setenv DVDCSS_RAW_DEVICE /dev/rdisk1
[vlc.app/Contents/MacOS] cohen% setenv DVDCSS_VERBOSE 2
[vlc.app/Contents/MacOS] cohen% setenv DVDCSS_METHOD disc
[vlc.app/Contents/MacOS] cohen% ./vlc --altivec --dvd dvd:/dev/rdisk1
VideoLAN Client - version 0.4.5 Ourumov - (c) 1996-2002 VideoLAN

libdvdcss debug: disc is scrambled
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: GetASF authenticated, ASF=1
libdvdcss debug: cracking disc key from key hash ... this will take some 
time
libdvdcss debug: cracking disc key
libdvdcss debug: initializing the big table
libdvdcss debug: cracked disc key is 02:ae:87:18:28
libdvdcss debug: getting title key the classic way
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: ioctl ReadTitleKey failed (region mismatch?)
libdvdcss debug: GetASF not authenticated, ASF=0
libdvdcss debug: lost ASF reqesting title key
libdvdcss debug: resetting drive and cracking title key
libdvdcss debug: requesting AGID
libdvdcss debug: drive authenticated, using variant 0
libdvdcss debug: authentication established
libdvdcss debug: GetASF authenticated, ASF=1
libdvdcss debug: cracking disc key from key hash ... this will take some 
time
libdvdcss debug: cracking disc key
libdvdcss debug: initializing the big table
libdvdcss debug: cracked disc key is 02:ae:87:18:28
libdvdcss debug: cracking title key
libdvdcss error: read error
libdvdcss debug: 0 of 0 attempts successful, 0 of 1 blocks scrambled
libdvdcss debug: file was unscrambled
libdvdcss debug: title key is 00:00:00:00:00
libdvdcss debug: unencrypted title
libdvdcss error: read error
libdvdcss error: read error
libdvdcss error: read error
libdvdcss error: read error
libdvdcss error: read error
.....

 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

After that it continues to print lines like the last one (libdvdcss 
error: read error)

I have to mention that following the instruction of the FAQ, I made a 
chmod a+w /dev/rdisk1 (giving write permission to the device).

It seems to me that libdvdcss is able to crack the disk key but for some 
reasons fail on the title key (which as far as I understood should be 
easy to get if one already have the disc key, right?)

Is this a known problem, or only a problem on MacOS or even on a certain 
type of machines?

For info, I have a PowerBook G4 (last generation, with DVI plug); the 
drive is a Matshita DVD-ROM/CD-RW : CW-8121 with firmware AA17.
I've tried both under system 10.1.5 and 10.2.1 without any difference.


Thanks in advance for any answer/help/comments....

Serge.

PS: I have some skills in C programming, and I'd be pleased to help if 
some one point me to where should I start...


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Serge Cohen

GPG Key ID: 1024D/69B1D346
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