[QUOTE=kner;69154]I attached two internal log files.
Another PC has a LITEON LH-20A1P DVD Drive(Drive letter is D).
I uninstalled and reinstalled various veisions of Passkey many times.
I found the following fact.
8.0.0.8 and 8.0.1.1 can decrypt CPRM with LITEON LH-20A1P and LH-20A1S.
But 8.0.1.3 and 8.0.1.5 can't do so.
Needless to say,8.0.0.8,8.0.1.1,8.0.1.3,8.0.1.5 can decrypt CPRM
with other DVD Drives except LITEON.
There may be some differences between 8.0.1.1 and 8.0.1.3 with respect to CPRM.[/QUOTE]
Finally... the light dawns!!
I looked at your Passkey logs, and was very surprised to see that the DVDs you're working with are DVD-VR discs.
The VR spec was written to cover Video Recorders, such as cameras or Playback machines that can also perform the Write function.
This spec is NOT DVD compliant, as instead of the normal VOB files we are used to seeing, VR files are contained in a VRO container, and the internal streams, which in DVD compliant VOB containers, must be MPEG streams, the contents of the VRO containers is usually not MPEG streams.
Playback is usually possible in the device that did the recording, but usually won't play at all in a set-top player, and will only play on a computer set up to decode the VR format.
DVDFab (and Passkey) are pretty much useless for this format (and pretty much un-necessary), as the recording devices don't encode any copy protection (CPRM or any other) while or after the recording is finished, unless your manual for the device is telling you different.
Not sure where you latched onto the idea that CPRM (or its brother, CPPM) are involved, but I think the major problem here is lack of different format compatibilty, rather than any particular copy protection scheme.
DC
:cool:
