[mythtv-users] Mythtv inducing DVB errors?

[Mike Ryan]

Hi

I'm getting similar errors, although not as often as Paul. However, I use an
Xbox for the front-end so maybe that's why. Pretty similar story though:

900Mhz Coppermine processor
Nota-T DVB card (The system also has a PVR-250 card installed and configured)
Fedora Core 2 running 2.6.8-1.521 Kernel
512Mb memory

DVB card is running V1.1.1 of the linuxtv dvb drivers

Running MythTV V 0.16.20040906-1

Here's an example of the error from the mythtv logfile:
2004-10-09 16:19:22 Started recording "BBC News" on channel: 1007 on cardid: 2,
sourceid 1
2004-10-09 16:19:22 Changing from None to RecordingOnly
2004-10-09 16:19:22 DVB#0 Recorder: Card opened successfully.
Videostream: ASPECT: 16:9  Size = 720x576  FRate: 25 fps  BRate: 6.50 Mbit/s
Audiostream: Layer: 2  BRate: 192 kb/s  Freq: 48.0 kHz
2004-10-09 16:26:14 DVB#0 WARNING - No data from card in 1 second.
2004-10-09 16:26:15 DVB#0 WARNING - Transport Stream Continuity Error. PID = 640
2004-10-09 16:26:15 DVB#0 WARNING - Transport Stream Continuity Error. PID = 641
2004-10-09 16:26:15 DVB#0 WARNING - Transport Stream Continuity Error. PID = 640
2004-10-09 16:26:15 DVB#0 WARNING - Transport Stream Continuity Error. PID = 641
2004-10-09 16:30:00 Finished recording BBC News on channel: 1007
2004-10-09 16:30:00 Changing from RecordingOnly to None
2004-10-09 16:30:00 Closing DVB recorder

Seems to happen intermittently across all channels. I live very close to the
transmitter so get a very strong signal and find that dvbstream works without
problem

Would welcome any suggestions

Cheers

Mike

Quoting Paul Woodward <paul_woodward at fastnet.co.uk>:

> Hi All,
>
> I am seeing really strange things with mythtv 0.16 that I've never seen
> before involving DVB, but I have recently changed a lot of variables so
> I'm not really sure... I wouldn't have thought that myth could cause
> these errors, but I can't create them any other way. Anyway, here's the
> story:
>
> When I run mythfrontend and tune into any channel (BBC ONE for example),
> I get almost continuous errors right from the start of playback:
> DVB#1 WARNING - Transport Stream Continuity Error. PID=640
> DVB#1 WARNING - Transport Stream Continuity Error. PID=641
> and the picture/sound break up at the same time.
>
> Doing a tzap on the same channel reveals a pretty low BER (<0x100) and a
> solid lock. In addition I can run:
> dvbstream -f5058333 -c0 -qam 16 600 601 -o | mplayer -
> and I have had a perfect stream for over an hour.
>
> scan also returns the correct multiplex dump without any problems.
>
> Unfortunately having done a fresh install of FC2, kernel 2.6.8.1 I can't
> be certain that I haven't changed any other variables. Can anyone shed
> any light?
>
> Specs:
> FC2, kernel 2.6.8.1
> P4 2.4C, 512Mb RAM
> M-Audio Revolution 7.1
> 2x Nova-T DVB card
>
> Thanks in advance,
>
> Paul
>
>