Error cracking CSS key

[Oskar Liljeblad]

Hi

Earlier when I ran vobcopy on this Lord of the Rings Special Edition
(region 2) disc 1 I got the following error (DVDCSS_VERBOSE=2):

[..]
libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x0000012f
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x00007577
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x00068f01
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_0.VOB at 0x0035738d
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_1.VOB at 0x00357392
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_1.VOB at 0x00367b34
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_04_1.VOB at 0x00367cef
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 requesting 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: decrypting disc key with player keys
libdvdcss debug: decrypted disc key is 00:07:5b:cd:15
libdvdcss debug: cracking title key
libdvdcss debug: still cracking...
libdvdcss debug: non MPEG block found (end of title)
libdvdcss debug: end of title reached
libdvdcss debug: 0 of 1 attempts successful, 1357 of 6344 blocks scrambled
libdvdcss debug: title key is 00:00:00:00:00
libdvdcss error: fatal error in vts css key
libdvdread: Error cracking CSS key for /VIDEO_TS/VTS_04_1.VOB (0x00367cef)!!
libdvdread: Elapsed time 5
libdvdread: Found 4 VTS's
libdvdread: Elapsed time 5

It appears that title 4 is actually just a short "logotype theme" added
by Svensk Filmindusti (Swedish film industy). Here's the file list for
the 4th title:

-r-xr-xr-x 1 root root 12288 Sep 12 2002 vts_04_0.bup
-r-xr-xr-x 1 root root 12288 Sep 12 2002 vts_04_0.ifo
-r-xr-xr-x 1 root root 12992512 Sep 12 2002 vts_04_1.vob

Anyway, so I tried ripping this CD with DVDDecryptor in Windows. And it
worked all fine - there were no errors. DVDDecryptor reported that this
title's key was C0 20 75 66 FB.

So I boot to linux and try it in vobcopy again. No errors this time:

libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_04_1.VOB at 0x00367cef
libdvdread: Elapsed time 0
libdvdread: Found 4 VTS's

I wonder if this has anything to do with region? Actually I did not
change the region on the DVD reader, but maybe it needed to be
initialized somehow? (I have never read any region encoded disc in
this drive anyway, and it is brand new.)

Or is the DVD broken?

I use libdvdread3 0.9.4 and libdvdcss2 1.2.6/1.2.8...

Regards,

Oskar Liljeblad (***@osk.mine.nu)