"fatal error in vts css key" with Babylon5 DVD

[Dominique Dumont]

Hello

I've got some problems with DVD 4 and 5 of the german edition of
Babylon 5 Season 4.

libdvdcss cannot crack the key of the latest VOB file (output
retrieved with DVDCSS_VERBOSE=2):

libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient
libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x00000130
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x000006f3
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x0000b417
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_1.VOB at 0x003901b4
libdvdcss debug: key found in cache
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_1.VOB at 0x00391035
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 00:00:00:00:37
libdvdcss debug: cracking title key
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: still cracking...
libdvdcss debug: non MPEG block found (end of title)
libdvdcss debug: end of title reached
libdvdcss debug: 0 of 2 attempts successful, 12950 of 38568 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_03_1.VOB (0x00391035)!!
libdvdread: Elapsed time 28
libdvdread: Found 3 VTS's
libdvdread: Elapsed time 28

Here's the content of the DVD:

$ ll /cdrom/VIDEO_TS/
total 7.3G
-r--r--r-- 1 4294967295 4294967295 16K 2004-03-04 19:15 VIDEO_TS.BUP
-r--r--r-- 1 4294967295 4294967295 16K 2004-03-04 19:15 VIDEO_TS.IFO
-r--r--r-- 1 4294967295 4294967295 2.8M 2004-02-25 17:45 VIDEO_TS.VOB
-r--r--r-- 1 4294967295 4294967295 120K 2004-03-04 19:01 VTS_01_0.BUP
-r--r--r-- 1 4294967295 4294967295 120K 2004-03-04 19:01 VTS_01_0.IFO
-r--r--r-- 1 4294967295 4294967295 87M 2004-03-04 19:00 VTS_01_0.VOB
-r--r--r-- 1 4294967295 4294967295 1.0G 2004-02-25 17:50 VTS_01_1.VOB
-r--r--r-- 1 4294967295 4294967295 1.0G 2004-02-25 17:53 VTS_01_2.VOB
-r--r--r-- 1 4294967295 4294967295 1.0G 2004-02-25 17:56 VTS_01_3.VOB
-r--r--r-- 1 4294967295 4294967295 562M 2004-02-25 17:58 VTS_01_4.VOB
-r--r--r-- 1 4294967295 4294967295 1.0G 2004-02-25 18:01 VTS_01_5.VOB
-r--r--r-- 1 4294967295 4294967295 1.0G 2004-02-25 18:04 VTS_01_6.VOB
-r--r--r-- 1 4294967295 4294967295 1.0G 2004-02-25 18:08 VTS_01_7.VOB
-r--r--r-- 1 4294967295 4294967295 501M 2004-02-25 18:09 VTS_01_8.VOB
-r--r--r-- 1 4294967295 4294967295 14K 2004-03-04 19:01 VTS_02_0.BUP
-r--r--r-- 1 4294967295 4294967295 14K 2004-03-04 19:01 VTS_02_0.IFO
-r--r--r-- 1 4294967295 4294967295 0 2004-02-25 18:09 VTS_02_0.VOB
-r--r--r-- 1 4294967295 4294967295 7.3M 2004-02-25 18:10 VTS_02_1.VOB
-r--r--r-- 1 4294967295 4294967295 14K 2004-03-04 19:01 VTS_03_0.BUP
-r--r--r-- 1 4294967295 4294967295 14K 2004-03-04 19:01 VTS_03_0.IFO
-r--r--r-- 1 4294967295 4294967295 0 2004-02-25 18:10 VTS_03_0.VOB
-r--r--r-- 1 4294967295 4294967295 76M 2004-02-25 18:10 VTS_03_1.VOB


I get the same problem with xine, mplayer or vlc. My system is:
- Debian unstable (kernel 2.6.7)
- libdvdcss 1.2.8
- libdvdread3 0.9.4

Fortunately, this problem only prevent reading some supplemental
material of the disc. All episodes can be viewed without a
problem.

The only hitch is the slow startup time of all DVD player due to the
fact that libdvdcss always retry to crack the key.

So could you either:
- solve the cracking problem (probably easier said than done..)
- make libdvdcss register the fact that the VOB file cannot be cracked
so that libdvdcss does not try to crack the key at each start of a
DVD player. The mechanism would be similar to the cache mechanism
implemented with .libdvdcss directory

Thanks for listening.