[mythtv] Mythfrontend dies (backtrace attached)

Jon Whitear mythtv at whitear.org
Wed Mar 17 03:44:32 EST 2004 

OK, I've recompiled Myth. When I run it I'm still getting the same
behaviour (i.e. I try to watch live TV, or a recording, and mythfrontend
dies, saying 'killed'.)

However, when I run mythfrontend through gdb, rather than dying I just get
a blank screen. Here's the backtrace. I would be most grateful if someone
could shed some light on this, because I'm really stuck!

teleputer root # gdb mythfrontend
GNU gdb 6.0
<snip>
This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db
library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/bin/mythfrontend
2004-03-17 19:32:15 mythfrontend version: 0.14.20040123-1 www.mythtv.org
2004-03-17 19:32:15 Enabled verbose msgs : important general
2004-03-17 19:32:16 Registering Internal as a media playback plugin.

Program received signal SIG32, Real-time event 32.
0x40a04a14 in pthread_getconcurrency () from /lib/libpthread.so.0
(gdb) thread apply all bt full
(gdb) bt
#0  0x40a04a14 in pthread_getconcurrency () from /lib/libpthread.so.0
#1  0x40a04858 in pthread_getconcurrency () from /lib/libpthread.so.0
#2  0x40a03f02 in pthread_create () from /lib/libpthread.so.0
#3  0x40244549 in TV::Init(bool) (this=0x82297e0, createWindow=true)
    at tv_play.cpp:245
#4  0x08064164 in startTV() () at main.cpp:201
#5  0x08065467 in TVMenuCallback(void*, QString&) (data=0x8207048,
    selection=@0x829ae24) at main.cpp:363
#6  0x4074f2dd in ThemedMenuPrivate::handleAction(QString const&) (
    this=0x829ad28, action=@0x8229594) at themedmenu.cpp:2056
#7  0x4074db51 in ThemedMenuPrivate::keyPressHandler(QKeyEvent*) (
    this=0x829ad28, e=0xbffff340) at themedmenu.cpp:1886
#8  0x40750700 in ThemedMenu::keyPressEvent(QKeyEvent*) (this=0x824b2b8,
    e=0xbffff340) at themedmenu.cpp:2242
#9  0x40d5cde5 in QWidget::event(QEvent*) () from /usr/qt/3/lib/libqt-mt.so.3
#10 0x40ccc47f in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/qt/3/lib/libqt-mt.so.3
#11 0x40ccbd0f in QApplication::notify(QObject*, QEvent*) ()
   from /usr/qt/3/lib/libqt-mt.so.3
#12 0x40c65bad in QETWidget::translateKeyEvent(_XEvent const*, bool) ()
   from /usr/qt/3/lib/libqt-mt.so.3
#13 0x40c61584 in QApplication::x11ProcessEvent(_XEvent*) ()
   from /usr/qt/3/lib/libqt-mt.so.3
---Type <return> to continue, or q <return> to quit---
#14 0x40c781d1 in QEventLoop::processEvents(unsigned) ()
   from /usr/qt/3/lib/libqt-mt.so.3
#15 0x40cde498 in QEventLoop::enterLoop() () from /usr/qt/3/lib/libqt-mt.so.3
#16 0x40ccc731 in QApplication::enter_loop() ()
   from /usr/qt/3/lib/libqt-mt.so.3
#17 0x407a9215 in MythDialog::exec() (this=0x824b2b8) at mythdialogs.cpp:718
#18 0x080668f2 in RunMenu(QString) (themedir=
      {static null = {static null = <same as static member of an already
seen type>, d = 0x81800e8, static shared_null = 0x81800e8}, d =
0x82394b0, static shared_null = 0x81800e8}) at main.cpp:511
#19 0x0806a829 in main (argc=1, argv=0xbffffab4) at main.cpp:914
(gdb)


>
> Yes, that's exactly what you need to do:
> http://www.mythtv.org/docs/mythtv-HOWTO-20.html#ss20.10
>
>> -----Original Message-----
>> From: mythtv-dev-bounces at mythtv.org
>> [mailto:mythtv-dev-bounces at mythtv.org] On Behalf Of Jon Whitear
>> Sent: dinsdag 16 maart 2004 3:03
>> To: mythtv-dev at mythtv.org
>> Subject: [mythtv] Mythfrontend dies - how to tell why?
>>
>>
>> When I try to watch LiveTV (or a recording) mythfrontend dies. There's
>> nothing in the logs to explain why. What's the best way to
>> trace this? I
>> suspect that I need to recompile and run through the debugger, but I'd
>> like to confirm that before I do it.
>>
>> I have posted on the mythtv-users list regarding this a
>> couple of times,
>> unfortunately without response. Those posts are attached below.
>>
>> Thanks,
>>
>> Jon
>>
>> ---------------------------- Original Message
>> ----------------------------
>> Subject: [mythtv-users] Please help a newb! DVB / Prebuffer time out
>> /mythfrontend dies From:    "Jon Whitear" <mythtv at whitear.org>
>> Date:    Fri, March 12, 2004 12:04 pm
>> To:      "Discussion about mythtv" <mythtv-users at mythtv.org>
>> --------------------------------------------------------------
>> ------------
>>
>> I'm using MythTV 0.14, installed from the gentoo ebuild. When
>> I watch live
>> TV or a recording, mythfrontend immediately dies - I get
>> returned to the
>> console, with a 'killed' response. The mythfrontend log shows many
>> 'prebuffer timed out' errors (mythfrontend log attached below.)
>>
>> Mythbackend seems quite happy, and recordings work OK (I see
>> a preview in
>> the 'watch a recording' screen, albeit rather slow and
>> jerky.) I get the
>> same behaviour with live TV and recordings.
>>
>> I am using a Via EPIA M1000 board with a VisionPlus (TwinHan)
>> DVB-T card
>> and Gentoo 2004.0 with the 2.6.1-epia kernel. I can capture a
>> stream using
>> dvbstream and play it in mplayer (using ALSA) just fine. My display
>> manager is KDE 3.2, and I have tried disabling artsd with no effect. I
>> have tried disabling (within MythTV) the CLE266 hardware MPEG decoder,
>> also with no effect. I have both native ALSA support and native arts
>> support uncommented in my settings.pro file (along with DVB and CLE266
>> support.)
>>
>> Has anyone seen this before? If not, what's the best way to proceed.
>> Should I recompile and run it throught the debugger? My
>> apologies for the
>> repeat post - I'm so close to getting it running after two months!
>>
>>
>> 2004-03-12 08:50:05 Registering Internal as a media playback plugin.
>> 2004-03-12 08:50:05 generating cache image for:
>> /usr/share/mythtv/themes/default/blank.png
>> 2004-03-12 08:51:30 Connecting to backend server:
>> 127.0.0.1:6543 (try 1 of
>> 5) 2004-03-12 08:51:30 20      MYTH_PROTO_VERSION 1
>> 2004-03-12 08:51:30 Using protocol version 1
>> 2004-03-12 08:51:30 24      ANN Playback teleputer 0
>> 2004-03-12 08:51:30 21      QUERY_RECORDINGS Play
>> 2004-03-12 08:51:30 20      MYTH_PROTO_VERSION 1
>> 2004-03-12 08:51:30 Using protocol version 1
>> 2004-03-12 08:51:30 24      ANN Playback teleputer 1
>> 2004-03-12 08:51:32 Estimated bitrate = 256000
>> Input #0, mpeg, from
>> '/var/media/captures/2_20040311203000_20040311210000.nuv':
>>   Stream #0.0: Video: mpeg2video, 720x576, 25.00 fps
>>   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>> 2004-03-12 08:51:32 waiting for prebuffer...
>> 2004-03-12 08:51:32 prebuffer wait timed out..
>> 2004-03-12 08:51:32 waiting for prebuffer...
>> 2004-03-12 08:51:32 prebuffer wait timed out..
>> 2004-03-12 08:51:32 Estimated bitrate = 256000
>> Input #0, mpeg, from
>> '/var/media/captures/2_20040311203000_20040311210000.nuv':
>>   Stream #0.0: Video: mpeg2video, 720x576, 25.00 fps
>>   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>> 2004-03-12 08:51:32 waiting for prebuffer...
>> 2004-03-12 08:51:33 prebuffer wait timed out..
>> 2004-03-12 08:51:33 waiting for prebuffer...
>> 2004-03-12 08:51:33 prebuffer wait timed out..
>> 2004-03-12 08:51:33 waiting for prebuffer...
>> 2004-03-12 08:51:33 prebuffer wait timed out..
>> 2004-03-12 08:51:33 waiting for prebuffer...
>> 2004-03-12 08:51:33 prebuffer wait timed out..
>> 2004-03-12 08:51:33 waiting for prebuffer...
>> 2004-03-12 08:51:33 prebuffer wait timed out..
>> 2004-03-12 08:51:33 waiting for prebuffer...
>> 2004-03-12 08:51:33 prebuffer wait timed out..
>> 2004-03-12 08:51:33 waiting for prebuffer...
>> 2004-03-12 08:51:34 Estimated bitrate = 256000
>> 2004-03-12 08:51:34 prebuffer wait timed out..
>> 2004-03-12 08:51:34 waiting for prebuffer...
>> Input #0, mpeg, from
>> '/var/media/captures/2_20040311203000_20040311210000.nuv':
>>   Stream #0.0: Video: mpegvideo_via, 720x576, 25.00 fps
>>   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>> 2004-03-12 08:51:34 Position map found
>> 2004-03-12 08:51:34 Opening OSS audio device '/dev/dsp'.
>> 2004-03-12 08:51:34 Over/underscan. V: 0, H: 0, XOff: 0, YOff: 0
>> 2004-03-12 08:51:34 prebuffer wait timed out..
>> 2004-03-12 08:51:34 waiting for prebuffer...
>>
>>
>> > I've got MythTV 0.14 installed using the gentoo ebuild.
>> When I try to
>> watch live TV, or a recorded show, I just get a blank screen. Usually
>> mythfrontend dies. Shows seem to record OK (i.e. the files
>> are large.) I
>> can play MPEG files (captured using dvbstream) using mplayer without
>> problems. I don't know where to start troubleshooting this, as I can't
>> see any obvious errors.
>> >
>> > Mythbackend shows this:-
>> >
>> > Starting up as the master server.
>> > 2004-03-11 08:44:37 DVB#0 Using DVB card 0, with frontend DST TERR.
>> 2004-03-11 08:44:37 DVB#0 Trying to tune to channel 10.
>> > 2004-03-11 08:44:37 DVB#0 WARNING - Unsupported
>> constellation parameter.
>> 2004-03-11 08:44:37 DVB#0 Frequency: 219500000. BW:7Mhz
>> HP:Auto LP:Auto
>> C:64 TM:8K H:None GI:1/16
>> > 2004-03-11 08:44:39 DVB#0 Waiting for frontend event after tune.
>> 2004-03-11 08:44:39 DVB#0 Status: CARRIER | VITERBI | SIGNAL | SYNC |
>> LOCK.
>> > 2004-03-11 08:44:39 DVB#0 Successfully tuned to channel 10.
>> > 2004-03-11 08:44:39 mythbackend version: 0.14.20040123-1
>> www.mythtv.org
>> 2004-03-11 08:44:39 Enabled verbose msgs :all
>> > --- print list start ---
>> > Title                 Chan  ChID  StartTime       S I C  C R O N
>> Priority Total
>> > ---  print list end  ---
>> > 2004-03-11 08:44:41 Found changes in the todo list.
>> > 2004-03-11 08:47:02 12      ACCEPT[]:[]1
>> > 2004-03-11 08:47:02 MainServer::HandleAnnounce Playback
>> > 2004-03-11 08:47:02 adding: teleputer as a client (events: 0)
>> > 2004-03-11 08:47:02 2       OK
>> > 2004-03-11 08:47:02 24      5[]:[]127.0.0.1[]:[]6543
>> > 2004-03-11 08:47:02 12      ACCEPT[]:[]1
>> > 2004-03-11 08:47:02 12      ACCEPT[]:[]1
>> > 2004-03-11 08:47:02 MainServer::HandleAnnounce Playback
>> > 2004-03-11 08:47:02 adding: teleputer as a client (events: 1)
>> > 2004-03-11 08:47:02 2       OK
>> > 2004-03-11 08:47:02 MainServer::HandleAnnounce Playback
>> > 2004-03-11 08:47:02 adding: teleputer as a client (events: 0)
>> > 2004-03-11 08:47:02 2       OK
>> > 2004-03-11 08:47:02 91
>> > rbuf://127.0.0.1:6543/var/media/buffer/ringbuf5...
>> > 2004-03-11 08:47:02 MainServer::HandleAnnounce Playback
>> > 2004-03-11 08:47:02 adding: teleputer as a client (events: 0)
>> > 2004-03-11 08:47:02 2       OK
>> > 2004-03-11 08:47:02 adding: teleputer as a remote ringbuffer
>> > 2004-03-11 08:47:02 2       OK
>> > 2004-03-11 08:47:02 Changing from None to WatchingLiveTV
>> > 2004-03-11 08:47:02 Using profile 'Live TV' to record
>> > 2004-03-11 08:47:02 DVB#0 Recorder: Card opened successfully.
>> > 2004-03-11 08:47:02 DVB#0 Adding pid 650, type 0
>> > 2004-03-11 08:47:02 2       ok
>> > 2004-03-11 08:47:02 DVB#0 Adding pid 512, type 1
>> > 2004-03-11 08:47:02 1       1
>> > 2004-03-11 08:47:02 5       29.97
>> > Videostream: ASPECT: 16:9  Size = 704x576  FRate: 25 fps
>> BRate: 15.00
>> Mbit/s
>> > Audiostream: Layer: 1  BRate: 224 kb/s  Freq: 32.0 kHz
>> > 2004-03-11 08:47:02 6       128000
>> > 2004-03-11 08:47:02 7       0[]:[]0
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:03 6       128000
>> > 2004-03-11 08:47:04 6       128000
>> > 2004-03-11 08:47:04 8       0[]:[]35
>> > 2004-03-11 08:47:04 79
>> > 0[]:[]0[]:[]0[]:[]0[]:[]0[]:[]14[]:[]0[]:[]4302...
>> > 2004-03-11 08:47:04 Changing from WatchingLiveTV to None
>> > Unable to write to client socket, as it's no longer there
>> > 2004-03-11 08:47:30 12      ACCEPT[]:[]1
>> > 2004-03-11 08:47:30 MainServer::HandleAnnounce Playback
>> > 2004-03-11 08:47:30 adding: teleputer as a client (events: 0)
>> > 2004-03-11 08:47:30 2       OK
>> > 2004-03-11 08:47:30 1337    4[]:[]Le Journal[]:[] []:[] []:[]
>> > []:[]11[]:[]1...
>> > 2004-03-11 08:47:31 12      ACCEPT[]:[]1
>> > 2004-03-11 08:47:31 MainServer::HandleAnnounce Playback
>> > 2004-03-11 08:47:31 adding: teleputer as a client (events: 1)
>> > 2004-03-11 08:47:31 2       OK
>> >
>> > Mythfrontend shows this:-
>> >
>> > 2004-03-11 08:47:23 mythfrontend version: 0.14.20040123-1
>> www.mythtv.org
>> 2004-03-11 08:47:23 Enabled verbose msgs :all
>> > mythtv: could not connect to socket
>> > mythtv: Connection refused
>> > lirc_init failed for mythtv, see preceding messages
>> > 2004-03-11 08:47:24 Registering Internal as a media playback plugin.
>> 2004-03-11 08:47:24 generating cache image for:
>> > /usr/share/mythtv/themes/default/blank.png
>> > 2004-03-11 08:47:30 Connecting to backend server:
>> 127.0.0.1:6543 (try 1
>> of 5)
>> > 2004-03-11 08:47:30 20      MYTH_PROTO_VERSION 1
>> > 2004-03-11 08:47:30 Using protocol version 1
>> > 2004-03-11 08:47:30 24      ANN Playback teleputer 0
>> > 2004-03-11 08:47:30 21      QUERY_RECORDINGS Play
>> > 2004-03-11 08:47:31 20      MYTH_PROTO_VERSION 1
>> > 2004-03-11 08:47:31 Using protocol version 1
>> > 2004-03-11 08:47:31 24      ANN Playback teleputer 1
>> > 2004-03-11 08:47:33 Estimated bitrate = 256000
>> > Input #0, mpeg, from
>> > '/var/media/captures/10_20040310200000_20040310203000.nuv':
>> >   Stream #0.0: Video: mpeg2video, 704x576, 25.00 fps
>> >   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>> > 2004-03-11 08:47:33 waiting for prebuffer...
>> > 2004-03-11 08:47:34 Estimated bitrate = 256000
>> > 2004-03-11 08:47:34 prebuffer wait timed out..
>> > 2004-03-11 08:47:34 waiting for prebuffer...
>> > 2004-03-11 08:47:34 prebuffer wait timed out..
>> > Input #0, mpeg, from
>> > '/var/media/captures/10_20040310200000_20040310203000.nuv':
>> >   Stream #0.0: Video: mpegvideo_via, 704x576, 25.00 fps
>> >   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>> > 2004-03-11 08:47:34 Position map found
>> > 2004-03-11 08:47:34 Opening OSS audio device '/dev/dsp'.
>> > 2004-03-11 08:47:34 Over/underscan. V: 0, H: 0, XOff: 0, YOff: 0
>> >
>> > The lirc errors are there becuase I haven't got as far as
>> configuring
>> lirc yet. I'm using an EPIA M10000 with Gentoo and KDE3.2. I have
>> compiled in support for the CLE266 hardware MPEG decoder, but
>> I get the
>> same results whether it is enabled or not. As always, any help is
>> greatly appreciated.
>> >
>> > _______________________________________________
>> > mythtv-users mailing list
>> > mythtv-users at mythtv.org
>> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>> >
>> >
>>
>> _______________________________________________
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>> mythtv-users at mythtv.org
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>
>>
>>
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>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
>>
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