[mythtv-users] Fwd: MythTV can't (safely) record UK Channel five

Sat Jan 20 17:41:13 UTC 2007

Hello Michael,

I just recompiled MythTV to debug mode using the latest checkout from
SVN. Unfortunately, my problem looks to be still there, but this time,
I got a gdb log :)

It doesn't seem to be the same problem as yours, Michael. I'll attach
the trace to this email and send one to the Myth-dev mailing list as
well.

-- How the problem happens --
Set MythTV to record any program on Five (uk-Crystal Palace), and
Mythbackend will just exit quietly with the lone message "Segmentation
Fault" (usually after 10 minutes of recording).

2007-01-20 12:16:59.133 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:00.013 Writing PAT & PMT @600369352 + 706880
2007-01-20 12:17:00.749 Writing PAT & PMT @600684440 + 318096
2007-01-20 12:17:01.161 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:01.785 Writing PAT & PMT @600963996 + 1519792
2007-01-20 12:17:02.585 Writing PAT & PMT @601277956 + 106032
2007-01-20 12:17:03.113 Writing PAT & PMT @601603760 + 1237040
2007-01-20 12:17:03.177 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:03.881 Writing PAT & PMT @601919600 + 141376
2007-01-20 12:17:04.937 Writing PAT & PMT @602200660 + 918944
2007-01-20 12:17:05.178 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:05.729 Writing PAT & PMT @602507100 + 848256
2007-01-20 12:17:06.865 Writing PAT & PMT @602789852 + 282752
2007-01-20 12:17:07.185 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:07.681 Writing PAT & PMT @603095540 + 212064
2007-01-20 12:17:08.337 Writing PAT & PMT @603411944 + 954288
2007-01-20 12:17:09.081 Writing PAT & PMT @603724212 + 918944
2007-01-20 12:17:09.209 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:10.297 Writing PAT & PMT @603997376 + 812912
2007-01-20 12:17:11.210 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:11.297 Writing PAT & PMT @604282384 + 1555136
2007-01-20 12:17:12.274 Writing PAT & PMT @604580552 + 212064
2007-01-20 12:17:13.153 Writing PAT & PMT @604883420 + 0
2007-01-20 12:17:13.218 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:14.193 Writing PAT & PMT @605169368 + 176720
2007-01-20 12:17:15.242 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:15.370 Writing PAT & PMT @605434448 + 1696512
2007-01-20 12:17:16.390 Writing PAT & PMT @605726600 + 883600
2007-01-20 12:17:17.270 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:17.286 Writing PAT & PMT @606028152 + 388784
2007-01-20 12:17:18.182 Writing PAT & PMT @606324252 + 954288
2007-01-20 12:17:19.294 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:19.342 Writing PAT & PMT @606606628 + 282752
2007-01-20 12:17:20.446 Writing PAT & PMT @606887876 + 35344
2007-01-20 12:17:21.294 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:21.654 Writing PAT & PMT @607153520 + 1131008
2007-01-20 12:17:22.694 Writing PAT & PMT @607437588 + 1625824
2007-01-20 12:17:23.302 DVBRec(0): 40 PID filters open.
2007-01-20 12:17:23.414 Writing PAT & PMT @607752300 + 1272384
2007-01-20 12:17:24.167 Writing PAT & PMT @608068328 + 600848
2007-01-20 12:17:24.926 PESPacket: Failed CRC check 0x0 != 0xffffffff
for StreamID = 0x0
2007-01-20 12:17:24.932 DVBRec(0): SetPAT(12866 on 0x101)
2007-01-20 12:17:24.933 CreatePATSingleProgram()
2007-01-20 12:17:24.934 PAT in input stream

Any ideas?

Cheers,
ken

On 1/19/07, Michael Tiller <michael.tiller at gmail.com> wrote:
> I have had (and, to some extent, am still having) a similar issue with my
> HDHomerun that might be relevant here as well.  I found many issues in the
> underlying FFMPEG code where a digital stream could be captured (in my case
> with the HDHomerun) but it was corrupted somehow.  This resulted in lots at
> least one divide by zero and several different potential null pointer
> references in the FFMPEG code.  I reported it both on the Myth TRAC system
> and ultimately to the FFMPEG people but I'm not convinced the message was
> completely received.
>
> The issues all boiled down to a lack of checks on valid date in the FFMPEG
> code.
>
> In my case, the problem manifested itself generating previews.  This could
> crash the frontend and even the backend (when generating previews for
> MythWeb, for example).  I'm assuming that if I tried to play the files they
> might crash as well?!?  Also, I suspect the commercial flagging would
> probably have died on these files as well.
>
> Just a thought.  Here is a link to the TRAC issue if anybody is interested.
>
> --
> Mike
>
>
> On 1/16/07, scratch1701 <scratchbuild at gmail.com> wrote:
> >
> > Hello, thanks for your reply
> >
> > > Although I'm running SVN (currently 12477, previously a build from
> > > 114xx time), I've never had a problem with recordings on five
> > > terminating (I record NBA and X Games coverage and Law & Order
> > > whenever it's on). I'm using the Sutton Coldfield transmitter for
> > > reception with KWorld DVB Xpert cards - could it be a transmitter or
> > > card specific problem?
> > >
> > > Have you turned on full 'recording' logging? Have you run a new
> > > channel scan after upgrading to 0.20? Can you record from five using
> > > other software such as kaffeine without incident?
> >
> > I have done a full channel scan and recorded some random channel Five
> > programsall day with Kaffeine with no problems. So I guess that the
> > hardware is fine.
> >
> > I haven't turned on full "recording" logging but I'll give it a go.
> > I'll run it from a terminal as well to check on the Sys out.
> >
> > Cheers.
> > /ken
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
>
>
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>
>
>
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