[DVDnav-discuss] start_sector < last_sector check failed on Star Trek: Into Darkness

[Erik Auerswald]

Hi,

On Thu, Nov 28, 2013 at 02:25:18PM +0000, Roger Pack wrote:
> On 11/20/13, Alexander Roalter <alex at roalter.it> wrote:
> > Am 19.11.2013 00:33, schrieb Bryce Harrington:
> >> On Tue, Nov 19, 2013 at 12:25:32AM +0100, Alexander Roalter wrote:
> >>> On 19.11.2013 00:05, Bryce Harrington wrote:
> >>>> STAR_TREK__INTO_DARKNESS generates this check failure:
> >>>>
> >>>> *** libdvdread: CHECK_VALUE failed in ifo_read.c:1676 ***
> >>>> *** for c_adt->cell_adr_table[i].start_sector <
> >>>> c_adt->cell_adr_table[i].last_sector ***
> >>>>
> >>>> (repeats 11 times)
> >>>>
> >>>> dvdbackup reports similar errors, and also reports:
> >>>>
> >>>> Error reading VTS_15_0.VOB at block 1999
> >>>> padding 49 blocks
> >>>> Error reading VTS_15_0.VOB at block 3391
> >>>> padding 193 blocks
> >>>>
> >>>> for VTS 07 to 15 (at which point I killed the process).
> >>>>
> >>>> I tested this on libdvdread version 4.2.0-1 from Ubuntu precise,
> >>>> 4.2.0+20130428 (from Debian), and the current 4.2.1 release candidate.
> >>>> No difference in behavior.
> >>>>
> >>>> The check is this code:
> >>>>
> >>>>      CHECK_VALUE(c_adt->cell_adr_table[i].start_sector <
> >>>>                  c_adt->cell_adr_table[i].last_sector);
> >>>>
> >>>> Simply commenting out the check doesn't result in proper behavior with
> >>>> this disk, so I don't think it's merely an issue with the check itself.
> >>>>
> >>>> Examining the actual values being encountered, on the first iteration
> >>>> (i=0), the start sector is 1343, with a last sector 0.
> >>>>
> >>>> Any other ideas of things to look at to figure out why this DVD is not
> >>>> working with dvdread?
> >>>
> >>> I guess it's the copy protection employed by Paramount. Had major
> >>> problems playing Star Trek XI, too. dvdnav does the trick, it's
> >>> title 13 on my (german) DVD (that came in the bundle with the BD -
> >>> for which I lack the processing key or the VUK).
> >>
> >> Ah, I don't actually care about having a copy of the movie (I've already
> >> seen it), I am just using it for testing dvdread functionality.  Also,
> >> might be other DVDs produced with similar oddnesses to them.
> >
> > I you just want the cases that don’t work, simply have a look out for
> > recent DVDs by Paramount, Sony and probably Disney. They all have (or
> > had) some sort of copy protection that dvdread couldn’t handle, but
> > dvdnav could (more or less ­­– still having problems playing some 5 year
> > old paramaount dvds with dvdnav, because it jumps around a lot, and
> > seeking doesn’t work as expected, either).
> 
> If you can point me to some offending dvd's on say amazon I'd be
> willing to try and check it out, though I'm a complete newb here :)

I have two DVDs with problems, but have not tried to find out what actually
goes wrong...

1) The German DVD of Disney's Alice in Wonderland (movie is from 2010)
   [see http://en.wikipedia.org/wiki/Alice_in_Wonderland_(2010_film) ]
-> Can be played on GNU/Linux using dvdnav via VLC or MPlayer, but does not
   work with dvdread using MPlayer (mplayer dvd://).

2) The German DVD of The Dark Knight (movie is from 2008)
   [see http://en.wikipedia.org/wiki/The_Dark_Knight_(film) ]
-> Does not work at all with VLC or MPlayer on GNU/Linux.

Erik
-- 
Never attribute to forethought what can be sufficiently explained by
incompetence.
                        -- Linus Torvalds