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Beaglebone Opencv: cam.read() throws error and timeout

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Hi All, I am running OpenCV on a Beaglebone Black with Ubuntu. After I installed it I tried importing it into python. That all worked so I tried to capture video from a USB Webcam. I can run the command `cap = cv2.VideoCapture(0)` but when I then run `ret, frame = cap.read()` it sits there for thirty seconds and then prints all this out: select timeout select timeout OpenCV Error: Assertion failed (total() == 0 || data != NULL) in Mat, file /home/ubuntu/opencv/modules/core/include/opencv2/core/mat.inl.hpp, line 410 Traceback (most recent call last): File "", line 1, in cv2.error: /home/ubuntu/opencv/modules/core/include/opencv2/core/mat.inl.hpp:410: error: (-215) total() == 0 || data != NULL in function Mat Everything I've searched for has come up empty, any ideas? Thanks,

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