On Fri, 12 Dec 2003, Erik Slagter wrote: >> That's what I used before, and that works ok. The problem is that I'm using >> 4 or more grabbers in one PC now, and capturing everything and skipping >> frames causes too much data on the PCI bus, resulting in image distortion. >> (distorted horizontal lines at random places, etc)... >Yeah typical... You might try to play with card latency's, but probably >you're just plain out of PCI bandwidth. Latency? Is there some BIOS setting or how it can be changed? And by the way, why wouldn't PCI bandwidth run out temporarily with just one card, if several devices try to transfer data at once? What PCI does in this case, allow one device to transfer one word, then the next, and so on, or is the bus allocated for a single device for a longer period? My single TV card (bttv878) makes the horizontal garbage as described if I use SCSI disk simultaneously, no matter whether synchronous or async mode or whatever transfer speed the SCSI controller is set, or how small image I'm capturing. (IDE works fine).
