[DVDnav-discuss] Bug report for specific DVD

[Michael Russo]

Not sure if the patch would help or if it's applicable to version 5 or has
to be rebased. But I know this DVD was extracted perfectly and plays on DVD
players. Same issue playing directly from DVD drive in VLC (which uses
libdvdnav of course).  Main title plays in mplayer.  I'll see if I can get
a Windows system or VM to play it there or maybe use a DVD shrinker on it
(but that will probably just copy the titles/menu/nav stuff anyway).


On Sat, Aug 16, 2014 at 1:35 PM, Roger Pack <rogerdpack2 at gmail.com> wrote:

> ...
> #13549 0x00007ffff7bd0675 in play_PGC (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:83
> #13550 0x00007ffff7bd07e0 in play_PGC_post (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:153
> #13551 0x00007ffff7bd0542 in play_PG (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:168
> #13552 0x00007ffff7bd0675 in play_PGC (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:83
> #13553 0x00007ffff7bd07e0 in play_PGC_post (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:153
> #13554 0x00007ffff7bd0542 in play_PG (vm=vm at entrye=0x7fffb4056e10) at
> src/vm/play.c:168
> #13555 0x00007ffff7bd0675 in play_PGC (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:83
> #13556 0x00007ffff7bd07e0 in play_PGC_post (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:153
> #13557 0x00007ffff7bd0542 in play_PG (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:168
> #13558 0x00007ffff7bd0675 in play_PGC (vm=vm at entry=0x7fffb4056e10) at
> src/vm/play.c:83
> ...
>
> looks like it's definitely infinitely recursing to me.
>
> I seem to recall some ancient patch that mentions ref counts something,
> wonder if that's related...
>
> http://lists.mplayerhq.hu/pipermail/dvdnav-discuss/2012-December/001816.html
> re-proposed once here
> http://comments.gmane.org/gmane.comp.video.dvdnav.general/1658
>
> [BTW does that patch have merit, even if unrelated, I wonder?]
>
>
>
> On Fri, Aug 15, 2014 at 10:23 AM, Michael Russo <greatquux at gmail.com>
> wrote:
>
> > That did help and I was now able to compile libdvdnav with TRACE defined.
> >  I still ran vlc through gdb in order to get a backtrace.  There was a
> LOT
> > of tracing going on, and now the SIGSEGV occurred inside of printf()
> > because it was trying to print out the invalid memory address.
>  Hopefully
> > there's something here you can use to track down what's going on.  It's
> > likely some weird form of copy protection.
> >
> >
> > On Thu, Aug 14, 2014 at 10:50 PM, gnosygnu <gnosygnu at gmail.com> wrote:
> >
> > > On Thu, Aug 14, 2014 at 9:01 AM, Michael Russo <greatquux at gmail.com>
> > > wrote:
> > >
> > > > I tried to define TRACE in vm.h (uncommenting the line) but I get a
> > > > message about an undefined constant FP_DOMAIN.  The compilation
> > > > succeeds without TRACE enabled.  I also can't find where this
> constant
> > > > is defined inside of libdvdnav.  Perhaps this is a simple oversight
> > > > related to all the cleanup work that took place in 5.0.0?
> > > >
> > > >
> > > Actually, it was probably related to an earlier commit. See:
> > >
> > >
> >
> http://git.videolan.org/?p=libdvdnav.git;a=commitdiff;h=331781f98a8ea6842beee38539f6470c3e8a819c
> > >
> > > I updated the constants just now:
> > >
> > >
> >
> http://git.videolan.org/?p=libdvdnav.git;a=commitdiff;h=da8a809a069c954872391acf7d6c97af1cdbc3a1
> > >
> > > I also cleaned up some compiler warnings in my earlier checkin that I
> > > didn't notice before. Sorry about that.
> > >
> > >
> >
> http://git.videolan.org/?p=libdvdnav.git;a=commitdiff;h=03cb72be09295686cf1af0af5d8661ab8d35b537
> > >
> > > Hope this helps.
> > > _______________________________________________
> > > DVDnav-discuss mailing list
> > > DVDnav-discuss at mplayerhq.hu
> > > https://lists.mplayerhq.hu/mailman/listinfo/dvdnav-discuss
> > >
> >
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> >
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