Bug#684313: vlc crash while playing DVB-T udp multicast (stream generated elsewhere on the LAN via mumudvb)

[Sebastian Ramacher]

Hi

On 2012-08-08 18:47:39, asronchetti at libero.it wrote:
> Package: vlc
> Version: 2.0.2-2
> Severity: normal
> 
> Dear Maintainer,
> 
> I use mumudvb on my LAN when i want to watch DVB-T television. I start 
> "mumudvb -stdc some_dvbt-mux-configuration" on the other pc and i use this pc 
> (a notebook) to view the udp multicast
> stream via vlc.
> The command i use is: "vlc udp://@239.100.0.2:1234 & " launched on a xfce4-
> terminal.
> 
> Vlc crashes often when playing such a stream. That DVB-T is from tv 
> broadcasting in Italy (often RAI, RAdio-televisione Italiana).
> Last crash happened after zirca 10 or 20 minutes since the launch of the 
> command.
> I only have a "Segmentation Fault" on the xfce4-terminal command line (there 
> are no syslog message at all about this).
> 
> here is the complete debug message of that crash:
> 
> vlc udp://@239.100.0.2:1234 &
> 
> [1] 12403
> VLC media player 2.0.2 Twoflower (revision 2.0.1-453-g40d9fef)
> [0xabe108] main libvlc: Running vlc with the default interface. Use 'cvlc' to 
> use vlc without interface.
> libdvbpsi error (PSI decoder): TS discontinuity (received 14, expected 0) for 
> PID 18
> libdvbpsi error (PSI decoder): TS discontinuity (received 5, expected 0) for 
> PID 256
> libdvbpsi error (PSI decoder): TS discontinuity (received 14, expected 0) for 
> PID 20
> libdvbpsi error (PSI decoder): TS discontinuity (received 6, expected 0) for 
> PID 17
> [0xdd4bc8] pulse audio output error: PulseAudio server connection failure: 
> Connection refused
> [mpeg2video @ 0xdb58c0] slice mismatch
> [mpeg2video @ 0xdb58c0] Warning MVs not available
> [mpeg2video @ 0xdb58c0] concealing 45 DC, 45 AC, 45 MV errors
> [1]   Segmentation fault      vlc udp://@239.100.0.2:1234
> 
> After that crash i launched the command again and managed to watch tv for at 
> least 30 minutes with no other interruptions. (after that 30 minutes, i closed 
> vlc)

I suppose you didn't get Rémi's message. I'm including it for your
convenience:

On 2013-02-05 21:01:58, Rémi Denis-Courmont wrote:
> From the kernel message, this is probably a bug in the VLC TS demuxer, though 
> it could be a bug in libdvbpsi as well. Unfortunately, without a sample MPEG-
> TS dump to reproduce the issue, or at the very least a symbolic stack trace of 
> the crash, we cannot investigate this bug further.

Could you please check if the bug persists in the current version of vlc
in sid? If it does, please also include a backtrace (install vlc-dbg and
follow the instructions on https://wiki.debian.org/HowToGetABacktrace).
Thanks

Regards
-- 
Sebastian Ramacher
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