Get maximum resolution when capturing image data with cvQueryFrame() - opencv

Question

I capture some image data from a HD cam using OpenCV and this code (relevant snippets only):
data->capture =cvCaptureFromCAM(data->config.device); // open the device
...
IplImage *grabFrame=cvQueryFrame(data->capture);
Using this code I always get a grabFrame with a size of 640x480 while the camera supports 1920x1080. When I do something like that after initialisation:
cvSetCaptureProperty(data->capture,CV_CAP_PROP_FRAME_WIDTH,1920);
cvSetCaptureProperty(data->capture,CV_CAP_PROP_FRAME_HEIGHT,1080);
I get results in real HD resolution - but blurred images, means it is only upscaled from 640x480 to HD resolution. So: how can I force OpenCV to really use the fill native resolution?
It does not seem to be a driver/HW problem since it happens on Windows and Linux - and when I try any other application on these systems I get the full, native resolution as expected.
Thanks!

Answer 1

1. From (old) opencv C documentation :
The function cvSetCaptureProperty() sets the specified property of video capturing.
Currently the function supports only video files: CV_CAP_PROP_POS_MSEC, CV_CAP_PROP_POS_FRAMES, CV_CAP_PROP_POS_AVI_RATIO.
2. You can try to compile opencv with openNI since VideoCapture class make use of it for setting capture device options.

Answer 2

It helped me:
static const int MAX_WIDTH_RESOLUTION = 7680;
static const int MAX_HEIGHT_RESOLUTION = 4800;
cvCreateCameraCapture(...);
cvSetCaptureProperty(pCam, CV_CAP_PROP_FRAME_WIDTH, MAX_WIDTH_RESOLUTION);
cvSetCaptureProperty(pCam, CV_CAP_PROP_FRAME_HEIGHT, MAX_HEIGHT_RESOLUTION);
cvQueryFrame(...);
With two different webcams i've got 1900x1080 and 1280x960 frames.