[libdvdcss-devel] xine fails to play dvds with libdvdcss 1.4.0

[Giacomo Comes]

On Wed, Oct 12, 2016 at 09:57:59AM +0200, Xavier Bachelot wrote:
> Hi,
> 
> On 12/04/2016 06:36, Giacomo Comes wrote:
> > xine does not play anymore dvds if libdvdcss 1.4.0 is installed.
> > 
> > With libdvdcss 1 3.0 (and dvdread/dvdnav 5.0.3) xine plays regularly
> > a dvd and shows this output in the terminal:
> > 
> > libdvdnav: Using dvdnav version 5.0.3
> > libdvdread: Couldn't find device name.
> > libdvdnav: Can't read name block. Probably not a DVD-ROM device.
> > libdvdnav: vm: dvd_read_name failed
> > libdvdnav: DVD disk reports itself with Region mask 0x00000000. Regions: 1 2 3 4 5 6 7 8
> > 
> > When I use libdvdcss 1.4.0 xine cannot play a dvd and in the terminal I get this message:
> > 
> > libdvdnav: Using dvdnav version 5.0.3
> > libdvdread: Couldn't find device name.
> > libdvdread: Could not open <DVD>/VIDEO_TS/VIDEO_TS.IFO with libdvdcss.
> > libdvdread:DVDOpenFilePath:dvdinput_open <DVD>/VIDEO_TS/VIDEO_TS.IFO failed
> > libdvdread: Could not open <DVD>/VIDEO_TS/VIDEO_TS.BUP with libdvdcss.
> > libdvdread:DVDOpenFilePath:dvdinput_open <DVD>/VIDEO_TS/VIDEO_TS.BUP failed
> > libdvdread: Can't open file VIDEO_TS.IFO.
> > libdvdnav: vm: failed to read VIDEO_TS.IFO
> > 
> > I bisected libdbdcss and I found the commit that causes the failure:
> > 
> > commit 6b95108d3de1755beab102b3a02ca7ef02494bd1
> > Author: Diego Biurrun <diego at biurrun.de>
> > Date:   Fri Nov 14 11:15:12 2014 +0100
> > 
> >     Clean up and simplify raw device support.
> > 
> >     Treat access to raw devices just like accessing any other device instead of
> >     providing different semantics. libdvdcss now tries raw devices on all OSes
> >     and bails out instead of continuing if accessing a raw device failed.
> > 
> > If I compile libdvdcss 1.4.0 reverting such commit, then xine works again.
> > 
> > Giacomo
> 
> I had most probably a similar issue, /dev/rdvd was missing on my system.
> I did not however try to bisect the git tree, I'm running plain 1.4.0.
> 
> I got ride of the issue by setting
> ""
> media.dvd.raw_device:/dev/sr0
> ""
> in the ~/.xine/config file.
> 
> I guess creating /dev/rdvd or symlinking it to a device that exists
> should work too.
> 
> Does a similar trick help for you ?
> 
> You can get more logs from libdvdcss by setting DVDCSS_VERBOSE=2 prior
> to running xine.
> 
> 
> Regards,
> Xavier

I my case, the missing raw device is not an issue because the error
happens when I play a local copy of a dvd image. 
I guess somewhere the code doesn't handle the raw device case
if the dvd content to access is in a directory.

Cheers,
Giacomo