On Sat, Feb 19, 2005 at 11:31:25PM +0000, Mark Smith wrote: > In message <[EMAIL PROTECTED]> > Hamish Moffatt <[EMAIL PROTECTED]> wrote: > > > I wouldn't touch any DVB card based on the BT878 with a 40 foot barge > > pole. See the linux-dvb archives for my reasons why. Both of these cards > > use that chip; in general, the cheaper cards use it. [..] > This begs the question of how many people are actually seeing a problem as a > result of lack of buffer space on these cards, given the widespread > availability of cards based on this chipset.
Judging by the traffic on linux-dvb, not many. In my system, I had the Avermedia 761 card, a Nova-T clone and the onboard SATA controller all on the same PCI bus, and it was unworkable. > I've seen various references to TS vs PS mode, but not sure quite how this > all works as yet. Is the entire mux data stream read across the PCI bus in > the former case? If so, is this contributing to the problem? There's no hardware filtering in either mode (I'm using PS mode). In all cases the entire mux data (up to 23Mbit/sec in Australia with QAM64). Lower bit rates might be another reason why others are more successful. In Australia we have QAM64 with either 2/3 or 3/4 FEC, leading to data rates of ~19 or ~23 Mbit/sec. Hamish -- Hamish Moffatt VK3SB <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
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