On Friday 12 December 2003 16:35, Erik Slagter wrote: > > Latency? Is there some BIOS setting or how it can be changed? > > Sometimes you can set it in the bios for all slots, sometimes only a max > value. AFAIK you can also set it individually for each grabber card > using the respective v4l(2) driver, with an insmod parameter "latency". > This should have a value in milliseconds between 1 and 255. The higher > the latency, the longer a PCI bus master is allowed to grab and keep the > PCI bus. This way maybe you could give your cards a bigger part of the > bandwidth over the disk. OTOH now you might start having throughput > problems to your disk controller :-( I am afraid it's insane anyway to > run more than 1 grabber card on a PCI33 bus, for full size capturing. My > previous motherboard (via 333 chipset) couldn't even keep up with 1 > grabber card at full resolution... I'm not so sure about that - at least not in every case. I have 1 bttv-based and 1 saa7134-based card, and I can start tvtime for both cards at the same time (minus the exclusive lock on /dev/rtc for whomever comes last). It works without problems, and tvtime certainly grabs fullsize-fullfps. Also, I thought it might be caused by a bad card making life hard for the good PCI-cards. I don't think that's the case though, as I have my current computer stuffed full of parts from my other computer, which broke down. There are 2 tv-cards, scsi-controller, 2 ide-controllers, 2 soundcards, etc. It all works without problems. (well, I have occasional problems with my soundcard. I think some PCI slots are better than others) Have you tried rearranging the cards? -- Regards, Christian Iversen
