Re: [Linux-uvc-devel] Test of the driver on GNU/Debian amd64

[Laurent P. <lau...@sk...>]

> OpenCV is now working with the uvc driver. I have implemented support of
> V4L2_PIX_FMT_YUYV in OpenCV. Feel free to checkout the CVS of OpenCV if
> you want to try it.

Good work. While you're at it, you can also implement MJPEG support ;-) I 
recently posted a patch to the video4linux and qt-interest mailing lists to 
add MJPEG support to Qt, it can be used as a starting point.

> I don't know why, but it seems changing the size of the capture don't
> works. I always have a capture of 1024x576 pixels. Even if I try to set
> to another size, like for example 640x480. This must be a problem with
> OpenCV, as it seems your test program is changing the resolution
> correctly (altough I don't have look at the output files, because I
> don't know how to display yuyv raw data images...).

That's normal. The minimum size for YUYV capture is 1024x576. Lower 
resolutions are only available in MJPEG. I'll ask Logitech if they can enable 
YUYV in lower resolutions in their firmware updates.

> Any way, thanks a lot for the driver. It's starting on the right way.

You're welcome. I'm glad people are interested in UVC.

Thanks for getting involved.

Laurent Pinchart