Interestingly, it works better when I disable soundcard, networking and unplug all other USB devices, including input devices. My RPi does not receive more than a few lines of image. At higher resolutions the camera switches to uncompressed YUV (what I originally wanted) and the data rate explodes. At 960x720 the images are compressed with MJPEG. Although my camera supports higher resolutions, I cannot use them. I assume your camera is also handled by this driver or your driver has a similar option. I managed to capture images from my Logitech webcam at 960x720 by loading the uvcvideo module with the option nodrop=1. Based on my observations, the RPi has serious issues with high data loads on the USB.
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