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

["Dr. Werner Fink" <werner@suse.de>]

On Tue, Oct 14, 2003 at 04:29:34PM +0200, Johannes Stezenbach wrote:
> Claas Hilbrecht wrote:
> > >If you get this errors with the signal from above, the frontend
> > >is not the problem. It could be a DMA problem.
> > 
> > I don't think so. If there's a DMA problem the RTL recording should be 
> > broken also. Even if I swap the cards so that the "broken" records RTL and 
> > the "fine" one records Sat1 the error will be the same. If any part of the 
> > hardware is broken the error should stay on the broken card.
> 
> By "DMA problem" I meant "problem with the DMA related driver routines".
> Jon Burgess fixed those about a month ago, but maybe some corner case
> is still buggy?

Hmmm ... at least I've tried the last patch of Jon (AFAIK it is now
part of the current driver) the bitstreamout plugin of VDR has seen
a lot of duped TS frames.   OK the plugin does not check about duped
TS frames but before the patch it was not necessary to check for dups.

Therefore: Could it be that the switch from 1/2->1/2 handling of
the DMA area to the area handling automatically dups TS frames
read from the full DAM area?  The card I use is a DVB-S 1.3.
Maybe it is possible to revert the patch if it is possible to
ensure that the pointers position for 1/2->1/2 handling is
always in sync with the data provided under pointer.


          Werner


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