Segfault in MHEG NetStream constructor

[Ian Richardson <grandmastermarclar@…>]

Starting with:

ian@babcom:~$ mythfrontend -v all > ~/mythfrontend.log.v.all.txt 2>&1 Segmentation fault

ian@babcom:~$ mythfrontend --version Please attach all output as a file in bug reports. MythTV Version : v0.27-pre-72-gda065e4 MythTV Branch : master Network Protocol : 75 Library API : 0.27.20120906-1 QT Version : 4.8.3 Options compiled in:

linux profile use_hidesyms using_alsa using_oss using_pulse using_pulseoutput using_backend using_bindings_perl using_bindings_python using_bindings_php using_crystalhd using_dvb using_firewire using_frontend using_hdhomerun using_ceton using_hdpvr using_iptv using_ivtv using_joystick_menu using_libcec using_libcrypto using_libdns_sd using_libxml2 using_lirc using_mheg using_opengl_video using_qtwebkit using_qtscript using_qtdbus using_v4l2 using_x11 using_xrandr using_xv using_bindings_perl using_bindings_python using_bindings_php using_mythtranscode using_opengl using_vaapi using_vdpau using_ffmpeg_threads using_live using_mheg using_libass using_libxml2

ian@babcom:~$

Please see attached.

Basically, any HD recording (typically from BBC HD), results in a few seconds of playback if you're lucky, then a restart of mythfrontend.

Instead, I have to jump behind the scenes and play the recording back using VLC.

It's been doing this since soon after I switched to 0.27. I've only just now had time to report the defect.

It's 100% repeatable.

[Ian Richardson <grandmastermarclar@…>]

Log of mythfrontend -v all > ~/mythfrontend.log.v.all.txt 2>&1

[Jim Stichnoth]

Please attach a backtrace of the mythfrontend crash, see http://www.mythtv.org/docs/mythtv-HOWTO-22.html#ss22.2 for details.

[Ian Richardson <grandmastermarclar@…>]

gdbcommands, based on the info from http://www.mythtv.org/wiki/Debugging#Running_gdb_directly onwards

[Ian Richardson <grandmastermarclar@…>]

output of gdb mythfrontend.real -x ~/gdbcommands

[Ian Richardson <grandmastermarclar@…>]

Hopefully the new attachments will give you something to work with...

[Jim Stichnoth]

Thanks for the stack trace. The crash appears to be MHEG related (and I don't have access to MHEG content). Can you verify whether the problem goes away when MHEG is disabled?

[Ian Richardson <grandmastermarclar@…>]

Siginificant Other is watching the main FE/BE box, but I've just verified on a different machine that this IS the case.

MHEG enabled: crash

MHEG disabled: OK.

So, at least I have a workaround. To be honest, I don't use MHEG because it hasn't worked for ages.

[stuartm]

MHEG has always worked fine here, and I'm not seeing any crash. I wonder what's different in your case?

Is this Freeview HD or Freesat?

[Ian Richardson <grandmastermarclar@…>]

I'm only recording HD via Freesat, either from BBC One HD or BBC HD. Do you need any more information?

[stuartm]

Having seen some better backtraces in IRC we're crashing on the connect() call in the NetStream? constructor but I cannot work out why.

[mythtv@…]

Fixed for me by ​https://github.com/MythTV/mythtv/commit/0bb3bc2d9ca25528944429e84c21743db57b15a1 (I provided the 'better backtraces in IRC).

-- Seeker`

[JYA]

Fixed in [0bb3bc2d9ca25528944429e84c21743db57b15a1]