[DVDnav-discuss] libdvdread 4.2.0 crashes

[Fabian Keil]

Timo Saarinen <timo.p.saarinen at gmail.com> wrote:

> I try view a DVD disc with VLC and Totem on Arch Linux. For some reason the
> both players fail to view a specific disc and give the following output to
> stdout. This happens both in 32 bit and 64 bit environments. Also VLC
> player on Windows fails to play the DVD. The other DVD don't have the same
> issue. There is another Windows DVD player, which can play the disc without
> problems. The related library versions are:
> 
> libdvdread 4.2.0
> libdvdnav 4.2.0
> 
> ----
> $ vlc /dev/sr0
> VLC media player 2.0.5 Twoflower (revision 2.0.5-0-g1661b7d)
> [0x82d038] main libvlc: Running vlc with the default interface. Use 'cvlc'
> to use vlc without interface.
> libdvdnav: Using dvdnav version 4.2.0
> libdvdread: Using libdvdcss version 1.2.12 for DVD access
> libdvdnav: DVD Title: BRAVE
> libdvdnav: DVD Serial Number: 413A98CA
> libdvdnav: DVD Title (Alternative): BRAVE
> libdvdnav: Unable to find map file '/home/timo/.dvdnav/BRAVE.map'
> libdvdnav: DVD disk reports itself with Region mask 0x00fd0000. Regions: 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 0x0000023d
> libdvdread: Elapsed time 0
[...]
> libdvdread: Get key for /VIDEO_TS/VTS_22_1.VOB at 0x00369bcb
> libdvdread: Elapsed time 0
> libdvdread: Found 22 VTS's
> libdvdread: Elapsed time 0
> libdvdnav: decoder.c: [WARNING, unknown bits: 1000000000080000]
> libdvdnav: decoder.c: [WARNING, unknown bits: 1000000000000000]
> 
> *** libdvdread: CHECK_VALUE failed in ifo_read.c:915 ***
> *** for pgc->cell_playback_offset != 0 ***
> 
> Segmentation fault (core dumped)

It's not clear to me that the crash actually happens in libdvdread.

Without a back trace it's impossible to be sure, but assuming the
DVD is http://www.imdb.com/title/tt1217209/ which looks like a
somewhat recent Disney title, I'd speculate that this is a
dvdnav_describe_title_chapters() issue.

It's possible that opening the DVD in vlc with the "No disc menus"
option checked works around the problem.

Applying the patches previously posted to this list might be
worth trying as well.

Fabian
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