[mythtv] Failed DVB recording

[Tom Hughes]

In message <1108064943.420bbaaf3b10f at www.digitalregime.com>
          Taylor Jacob <rtjacob at earthlink.net> wrote:

> Quoting Tom Hughes <tom at compton.nu>:
> 
> > I had a DVB recording fail last night. The relevant log extract is:
> 
> > 2005-02-09 18:30:04.271 DVB#0 DVB signal 5300 | snr 5000 | ber 143af12 | unc
> > 7961d18
> > 2005-02-09 18:30:04.273 DVB#0 Status: LOCK.
> > 2005-02-09 18:30:04.273 DVB#0 Multiplex Locked
> > 2005-02-09 18:30:10.966 DVB#0 Timeout Getting PMT
> > 2005-02-09 18:30:11.096 DVB#0 ERROR - Tuning for channel #4 failed.
> > 2005-02-09 18:30:11.176 Changing from None to RecordingOnly
> > 2005-02-09 18:30:11.237 DVB#0 Recorder: Card opened successfully (using PS
> > mode).
> > 2005-02-09 18:30:12.265 DVB#0 WARNING - No data from card in 1 second.
> > 2005-02-09 18:30:13.316 DVB#0 WARNING - No data from card in 1 second.
> > 2005-02-09 18:30:14.318 DVB#0 WARNING - No data from card in 1 second.
> >
> > Obviously it failed to tune the right channel due to a timeout
> > getting the PMT from the multiplex. I don't know what the cause
> > of that was, but what happened afterwards is that it continued
> > to pretend it was recording and spew out those "No data" messages
> > for the duration of the program.
> 
> Can you tune to this multiplex with zap and look at the PMT deltas?  There is
> currently a 5 second PMT timeout when attempting to get the PIDs for the
> desired channel.  The average PMT delta is .1 to .2 seconds, so I suspect that
> there was some issue with the deilvery of it.

OK. I've worked out how to do this now by tuning with tzap and then
using dvbsnoop to look for the PMT data. They are coming in about
every 0.19 seconds most of the time - one or are longer but the longest
that I've seen is about 0.35 or so.

Tom

-- 
Tom Hughes (tom at compton.nu)
http://www.compton.nu/