op za 22-03-2003, om 14:03 schreef Ronald Bultje: > Hey Bert, > > On Sat, 2003-03-22 at 13:40, Bert van Oort wrote: > > 1) I removed my Hauppauge tv card, because I wasn't using it anymore and > > moved the DC10+ card to another PCI slot far away from any interference > > sources. When I first saw the bands after that, I thought the card had > > caught some static charge from me moving it. After testing with lavrec > > without xawtv running the problem wasn't there so it couldn't be a > > hardware problem. > > I wouldn't be too sure about that. Xawtv causes raw frame PCI > throughput, lavrec only gives MJPEG capture throughput. Xawtv requires > far more from the PCI bus than lavrec. Besides, xawtv is PCI->PCI, while > lavrec is PCI->mem. It could be that this is part of the problem. > > Try moving the card back, if you have some time.
I have moved the card back and did some further testing by changing card positions, but this doesn't seem to have any effect on the bands. However I found some other factors that influence the problem: 1) Color depth: The higher the color depth, the closer the bands are together. The bands also don't directly start at the left edge of the screen. This makes it seem like something happens when the image is transferred to the screen; 2) Overlapping windows: When there's a window partly on top of Xawtv on the left side then the bands start at exactly the same distance from the left side of Xawtv as they start from the right side of the overlapping window. See snapshot: http://www.xs4all.nl/~bvanoort/snapshot_with_overlapping_window.png So to me this seems a data transfer problem, because it happens at the same amount of pixels from left to right. BTW: Xawtv was started with -noxv. When Xawtv is started with -xv then an overlapping window has no influence on the distance from the first band to the left side of the Xawtv window. How is the data copied from the DC10 to the video card? By software or hardware? Do you know any factors that could influence the data transfer negatively like this? Kind regards, Bert ------------------------------------------------------- This SF.net email is sponsored by:Crypto Challenge is now open! Get cracking and register here for some mind boggling fun and the chance of winning an Apple iPod: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0031en _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
