python opencv利用摄像头抓取视频（ubuntu）

python + opencv +ubuntu 实现利用摄像头抓取视频（ubuntu）

#!/usr/bin/env pythonimport cv2cv2.cv.NamedWindow('testcamera', cv2.cv.CV_WINDOW_AUTOSIZE)capture = cv2.VideoCapture(0)print capture.isOpened()num = 0while 1:  ret, img = capture.read()  cv2.imshow('testcamera', img)  key = cv2.waitKey(1)  num += 1  if key==1048603:#<ESC>    breakcapture.release()cv2.destroyAllWindows()