[mythtv] Re: [mythtv-commits] Re: Ticket #264: PMT always on failsCRC check

Allan Stirling Dibblahmythml0015 at pendor.org
Mon Aug 29 17:35:33 UTC 2005

Torbjörn Jansson wrote:
>>> (In [7169]) Fixes #264.
>>> The "VLSI VES1x93 DVB-S" and "Philips TDA10046H DVB-T" DVB
>>> cards occasionaly munge the PMT. The PMT is still readable
>>> but the CRC check fails. This commit changes MythTV so that
>>> it does not do a CRC check on the PMT for these cards
>>Sorry - I just realised. These aren't card names. They're the names of
>>the frontends. Which don't have any effect on the datastream, hence
>>special-casing them doesn't help. It's the model / type of
>>the DVB card
>>that matters, AFAIK.
> How can they not affect the datastream when they do error checking and
> correction?

... Because the error is happening above this level. The specific cards 
I have the issue with are 'fully featured' cards, which use an ARM CPU 
with firmware that does the section filter. Daniel is suggesting that 
the card is rewriting the section incorrectly in the filter.

I'm not completely convinced of this, since dvbsnoop seems to show the 
right CRC value.



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