On Fri, May 24, 2002 at 09:05:17PM -0400, Isaac Richards wrote: > Hi, > > I recently bought a TV capture card (ATI TV Wonder VE) and have noticed some > strange artifacts when recording video. Every now and then, I'd see a short > horizontal line across parts of the image. I managed to capture a frame of > one -- screengrab of it is http://ijr.dnsalias.org/snapshot1.png -- and saw > that the line was basically the proper image data, just offset a bit from the > frame. > Anyone have an idea of what might be causing this? I don't know what to do > next, so if anyone out there has an idea of a cause or how to fix it, I'd > greatly appreciate it. I _was_ able to significantly reduce the impact of > these artifacts by blending the previous frame into the current frame, but as > can be expected that basically kills motion in the video.. This was recently discussed here (see noise...). That are problems with busmastering PCI transfers. I guess you have a VIA board? I too, I updated to the latest BIOS and now it works. You can also try to reduce the pci-latency. But that did not help in my case. Reducing the picture size to 320x240 helped too. setpci -v -d *:* latency_timer=8 and set the latency of the bttv higher modules.conf: options bttv latency=64 lspci -v shows you the actual settings btw. I was not able to completely remove that artefacts, one out of 1000 pictures still have a missing line. Matthias
