[linux-dvb] Nova card drops packets, but tuner reports 0 BER & 0 Uncorr blocks

[<mocm@metzlerbros.de>]

Steve Brown writes:
 > 
 > Although the tuner reports a perfect signal, continuity count errors 
 > occur on the filtered pids. I doubt that the transmitter is actually 
 > dropping packets. The only other explanations seem to be either 
 > erroneous reporting from the tuner or the dvr read code dropping packets.
 > 
 > I'm pretty sure that the tuner is correctly reporting.  I experimented 
 > by misaligning the antenna and noticing that the BER goes up first and 
 > the uncorr block count later. When the antenna is repositioned, both 
 > values go back to zero.
 > 
 > The problem is also intermittent. Sometimes there are no cc errors and 
 > sometimes they return. In both cases, the tuner reports a perfect 
 > signal. Also, they are "real errors" as I can see pixelation in the 
 > decoded output when there are cc errors and none when the cc errors go 
 > away. The cvs and 0.9.4 drivers behave the same. Finally, it seems 
 > independent of transponder.
 > 
 > I distilled this down to a 12 line loop in a test program that audits 
 > the continuity count of selected pids. No errors are reported from the 
 > dvr read.
 > 
 > Has anybody seen this?

Not that I know of.
Could you describe exactly what you do and what kind of system you
have. Also under what circumstances and how often the errors occur.

Marcus


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