Hi Benson, On Tuesday 29 March 2011 06:59:38 Benson Bear wrote: > On Mon, Mar 28, 2011 at 5:36 AM, Alexey Fisher wrote: > > The reason can be... lost packets by usb controller... or may be camera > > send only this parts... or hmm... > > You seem to be suggesting some hardware problem or a defect > with the camera? This seems very unlikely to me: recall the > camera seems to works "out of the box" with cheese, camorama, > xawtv, camstream, guvcview. Only with skype and in some cases > with luvcview do I get this distorted pattern, which is the same sort > of pattern subjectively that I get when I run the gstreamer pipeline > without the conversion element in it. > > I also have now tested in in Windows 7 and it seems to work > fine there "out of the box" as well. > > > Can you please attach dmesg with trace, to enable trace you need: > > sudo rmmod uvcvideo && sudo modprobe uvcvideo trace=0xffff > > Don't know quite what you mean? dmesg output during > what? I attached the dmesg output when the camera is > plugged in, followed by two runs of luvcview (the > first two command lines below). I > > Except I edited out huge amounts of these lines > throughout (which are very suggestive of a format > mismatch as well): > > "uvcvideo: Dropping payload (out of sync)." > > > Can you please also try different frame rates with yuv. > > Yes, before, per instruction, I used the default. But I now > find that lucview gives nice looking results for any frame rate > above 17. > > In other words, > > luvcview -f yuv -s 320x240 -d /dev/video1 -i 17 > > does not work, but > > luvcview -f yuv -s 320x240 -d /dev/video1 -i 18 > luvcview -f yuv -s 320x240 -d /dev/video1 -i 19 > > etc all do work.
Have you tried all the frame rates supported by the camera (30, 25, 20, 15, 10 and 5 fps) ? Do 5, 10 and 15 fail, and 20, 25 and 30 work ? -- Regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
