I've been playing with uvc, and the most common source of problems is the
USB (in my experience).
You have to plug the camera in a USB2.0, and make it sure that is 2.0,
not a
Hub and not a usb extension to plug more devices in the same bus. It might
also help if you plug the webcam in an isolated bus, i mean, only 1 device
per USB bus (they are often set by couples)
While testing in my computer, realised that plugging in a 1.0 or 1.1, makes
the /dev/video0 or the /dev/v4l/video0, but it never gives a valid image.
That should be because the webcam gives you 2 kind of frames, compressed
and
YUYV, and only compressed is available in a 1.0 or 1.1 USB.
The most tipical behaviour in capture software is
to bail out decoding if the format on the buffer is unsupported.
try with that or pray to god. :D
bye!
On 2/4/07, Laurent Pinchart <laurent.pinchart (at) skynet.be> wrote:
Hi George,
> I recently got a Logitech Quickcam Notebook Pro and was trying to use
the
> UVC driver to get it working. I checked out a trunk as of 10 minutes
ago,
> did a make, make install... and plugged in my camera. I then saw this:
>
> usb 1-4.3: new high speed USB device using ehci_hcd and address 8
> usb 1-4.3: configuration #1 chosen from 1 choice
> uvcvideo: Found UVC 1.00 device <unnamed> (046d:08cb)
> usbcore: registered new driver uvcvideo
> USB Video Class driver (v0.1.0)
>
> it created /dev/v4l and /dev/v4l/video0
>
> I then opened up mplayer, which I am successfully able to watch TV in
with
> ivtv since i built in support for v4l... however when I open up video0
in
> mplayer i get: Playing /dev/v4l/video0.
> Win32 LoadLibrary failed to load: avisynth.dll, /avisynth.dll,
> /usr/lib/win32/avisynth.dll, /usr/local/lib/win32/avisynth.dll
>
> and the video from the camera never plays.
>
> I also tried using "camsource" which worked with another webcam of mine
on
> a separate computer and that also was not able to open the device and
> capture an image.
>
> The website says this camera is supported, and the hardware ID matches.
>
> Just looking for any help and suggestions! I would greatly appreciate
it.
Could you pleas try luvcview ? Some software don't work with the Linux
UVC
driver, as they don't implement V4L2 support properly (or at all).
Best regards,
Laurent Pinchart
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