Hi Celejar, On Wednesday 13 January 2010 00:12:27 Celejar wrote: > Hi, > > I have a cheap, no-name webcam from FocalPoint.com. Video seems to > basically work (tried with xawtv and mplayer), but with banding > (regularly spaced bluish horizontal bands that seem to move vertically > upward, taking about a second or two to travel from the bottom of the > image to the top).
That's usually caused by a mismatch between the power supply frequency and the sensor sampling rate. Have you tried in plain daylight ? > Haven't tried sound since the short lengths of the USB and mic cables and > the location of my machine's ports make plugging both in simultaneously > difficult or impossible. > > Thanks for your work on this project! You're welcome. Thanks for the report. I'll update the supported devices list as soon as Berlios become responsive again. > The camera is (similar to?) this one: > > http://www.focalprice.com/CW013B/USB_Digital_Video_4_LED_Webcam_PC_Camera_w > ith_Microphone_Black.html > > From syslog: > > [12312.163037] usb 1-3: new high speed USB device using ehci_hcd and address > 6 > [12312.287782] uvcvideo: Found UVC 1.00 device USB2.0 Camera (1e4e:0100) > [12312.292382] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. > Enabling workaround. > [12312.293512] input: USB2.0 Camera as > /devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0/input/input14 > > Note that the camera doesn't seem to work when plugged into my (cheap) > USB hub - both mplayer and xawtv complain of "select timeout". > > From syslog (when plugged into the hub): > > [12132.686602] usb 3-1.1: new full speed USB device using uhci_hcd and > address 4 > [12132.793599] usb 3-1.1: not running at top speed; connect to a high speed > hub > [12132.837654] uvcvideo: Found UVC 1.00 device USB2.0 Camera (1e4e:0100) > [12132.843584] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. > Enabling workaround. Jan 12 17:49:00 localhost kernel: > [12132.844729] input: USB2.0 Camera as > /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1.1/3-1.1:1.0/input/input13 As stated by the log, you should connect the camera to a high speed hub :-) Your hub is probably running at full speed only (12 Mb/s), and the camera seems to require high speed (480 Mb/s). -- Regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
