[linux-dvb] Re: can't record some channels with vdr and a nova-s budget card.

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Johannes Stezenbach wrote:
> 
> Klaus Schmidinger wrote:
> > Johannes Stezenbach wrote:
> > > claas+linuxtv-dvb@jucs-kramkiste.de wrote:
> > >
> > > > RTL was recorded without any errors.
> > > >
> > > > SAT1 was recorded with these errors:
> > > >
> > > > Oct 13 21:00:00 tvt1 vdr[795]: cTS2PES got 1403 TS errors, 9577 TS continuity errors
> > > > Oct 13 21:00:00 tvt1 vdr[795]: cTS2PES got 83 TS errors, 3768 TS continuity errors
> > > > Oct 13 21:00:00 tvt1 vdr[795]: buffer stats: 143068 (0%) used
> > >
> > > If you get this errors with the signal from above, the frontend
> > > is not the problem. It could be a DMA problem.
> > > But since the card of the same making seems to work for other people,
> > > it is possible that your card or your motherboard is subtly broken.
> > >
> > > Why does VDR report two different error counts in the same second?
> >
> > The first one is for the video, the second one for the audio data.
> >
> > > What exactly are continuity errors and TS errors in VDRs view?
> >
> > "TS errors" counts the TS packets where the TS_ERROR flag is set.
> > "TS continuity errors" counts the packets where the continuity
> > counter is not consistent.
> >
> > See VDR/remux.c, cTS2PES::ts_to_pes().
> >
> > With that many errors I guess there must be something fundamentally
> > wrong with the incoming data.
> 
> Yes, certainly.
> 
> One note: iso13818-1 allows duplicate TS packets (same CC value) in some
> circumstances, your code does not handle this correctly (especially:
> duplicate packets and packets with errors do not seem to get dropped).
> Also, if the discontinuity indicator is set, the CC may be discontinuous,
> too. You might want to count legal dupes and discontinuites in VDR.

These are just statistics and were implemented by Teemu Rantanen.
So maybe Teemu feels like improving this? ;-)

Klaus


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