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 python

import cv2
cv2.cv.NamedWindow('testcamera', cv2.cv.CV_WINDOW_AUTOSIZE)

capture = cv2.VideoCapture(0)
print capture.isOpened()
num = 0

while 1:
  ret, img = capture.read()
  cv2.imshow('testcamera', img)
  key = cv2.waitKey(1)
  num += 1
  if key==1048603:#
    break

capture.release()
cv2.destroyAllWindows()