[linux-dvb] Re: transport errors & femon

[Holger Waechtler <holger@convergence.de>]

Hamish Moffatt wrote:
> On Mon, Feb 09, 2004 at 12:37:25AM +0100, Holger Waechtler wrote:
>
> > Hamish Moffatt wrote:
> >
> > > What about the tda1004x - do you trust its counters? I'm definitely
> > > getting packets flagged as errored from the demux device while the
> > > uncorrected error count is always zero.
> > maybe you want to check the counter reset code in the driver (or is it 
> > reset automatically at each read?) to be sure...
>
> Is it possible that the transport errors are actually caused by buffer
> overflows inside the frontend? Is there a way to detect that? (Does it
> even have buffers?)
There are FIFOs to smooth the MPEG clock jitter, but it's pretty 
unlikely that anything there is related to the error indicator bit in 
the TS header.

> In MythTV when I'm changing channels on the Avermedia card (sp887x,
> microtune frontend plus bt878 bridge), about 30-50% of the time I get
> non-stop errors. If I quit from live TV and go in again (which doesn't
> involve retuning the frontend), it works OK. No change in BER/UNC from
> femon.
Hmm, don't understand what you mean here...

> The sp887x/dvb-bt8xx combination reports a Microtune 7202 tuner but
> there's no mention of that on Microtune's web site, nor in Google
> really. They do have a 7072 though. Could it be a typo?
yes, right. Should be fixed now.

Holger



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