debian下opencv-python调用摄像头

# 具体看ffmpeg官网 http://www.deb-multimedia.org sudo echo "deb http://www.deb-multimedia.org jessie main non-free" >> /etc/apt/source.list

sudo apt-get install ffmpeg

sudo apt-get install python-opencv

# coding: utf-8

import cv2

video_num = 0
cap = cv2.VideoCapture(0)

while cap.isOpened():
ret, frame = cap.read()
print ret
print frame
if ret:
cv2.imshow('frame', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break

cap.release()
cap.destroyAllWindows()