Need help with web cam, v4l, etc.

Gary W. Swearingen garys at opusnet.com
Sat May 20 20:37:29 UTC 2006


I'm trying to use "camstream" software with my web cam.

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
$ caminfo
CVideoDevice::ResetImagesRGB()
CVideoDevice::ResetImagesYUV()
Detected 0 Video4Linux devices.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

So I've obviously got no v4l device configured.

So I check messages for when I plugged in web cam.
(It's an odd cheapo thing but I've found it listed
in some web site as being supported by spca5xx driver.)

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
% tail /var/log/messages
May 20 12:15:00 localhost kernel: [865372.491884] usb 1-2: new full speed USB device using ohci_hcd and address 4
May 20 12:15:01 localhost kernel: [865373.085394] Linux video capture interface: v1.00
May 20 12:15:01 localhost kernel: [865373.110899] drivers/usb/media/spca5xx/spca5xx-main.c: USB SPCA5XX camera found. Pixart PAC207BCA
May 20 12:15:01 localhost kernel: [865373.116424] usbcore: registered new driver spca5xx
May 20 12:15:01 localhost kernel: [865373.116509] drivers/usb/media/spca5xx/spca5xx-main.c: spca5xx driver 00.57.08 registered
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

and

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
$ lsmod | head -3
Module                  Size  Used by
spca5xx               626108  0
videodev               13696  1 spca5xx

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

That last line leads me to think there should be a device
configured.

and

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
$  cat /proc/devices | grep video
 81 video4linux
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

so does that.

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
$ cat bus/usb/devices

(Names the pixart camera, with lots of info of no
meaning to me.)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The only related thing the "camstream" docs say is:

    First, make sure the various modules for your TV grabber and/or
    webcams are loaded if necessary.

Is there some other Linux kernel module I need, or what?


Thanks.





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