[DVDnav-discuss] libdvdread asserts on specific dvd

Alexander Roalter alex at roalter.it
Fri Jan 8 17:13:33 CET 2010

Markus Beyer wrote:
> Hi list,
> while trying to read the DVD of The Dark Knight, libdvdread4 throws the following assertion:
> *** libdvdread: CHECK_VALUE failed in ifo_read.c:1914 ***
> *** for pgci_ut->nr_of_lus < 100 ***
> This error repeates once more and the the whole machine gets really, really slow.
> I am not a DVD expert so I hope someone can make something out of this.
> If you need any more information, I'd be happy to provide it.
> Cheers,
> Markus
from your email address I assume you're talking about the german dvd.

This DVD is protected by something called Protect-X which scrambles the
file system infos on the disk and there must be a patch applied in order
to read the disk. You need dvdnav for it, also.


mplayer dvdnav://1

from a current SVN version should do the job (AFAIK the patch for the
incorrect file system infos is in it for now over a year).


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