Hi Andieh, On Tuesday 18 December 2007, Andieh wrote: > Hi there! > > i bought me a logitech quickcam 5000 months ago. i tried to get it to > work with motion, but i have many messed up pictures. I had to reduce > down the pictures to a very small resolution and have to restart motion > every 10 minutes to get some good results. this "worked" for me since > sommer this year. > > today i tried a complete update, motion and linux-uvc from svn. i hoped > the problems dissapear. but i have them again. they now come rarly, but > they are still there. here is a picture of it: > http://www.informatik.uni-frankfurt.de/~fuertig/upload/bilder/2007121818041 >3.jpg
That's caused by a lost USB isochronous packet. The UVC streaming format doesn't make it possible to detect lost packets, so the image can't be padded. The rest of the image will be shifted. > i searched a lot and found a little help on the quickcam team page, but > the hints are dated from 2006. is this still a bug? When bandwidth is not involved, this kind of problem can be caused by bad USB cables, or noisy electrical environments. Making sure your USB cable doesn't run too close to power cables might help. Replacing the cable is obviously impossible with most webcams. > here some other informations for you: > motion, linux-uvc svn > archlinux with kernel 2.6.23 > usb 2.0 pci card > lsusb: Bus 004 Device 002: ID 046d:08ce Logitech, Inc. QuickCam Pro 5000 Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
