# coding:utf8

 import cv2

 """

 捕获摄像头10s的视频信息 写入一个avi文件

 """

 cameraCapture = cv2.VideoCapture(0)     # 传入0代表0号摄像头

 fps = 30

 size = (

     int(cameraCapture.get(cv2.CAP_PROP_FRAME_WIDTH)),

     int(cameraCapture.get(cv2.CAP_PROP_FRAME_HEIGHT))

 )

 videoWriter = cv2.VideoWriter(

     "outputVid.avi",

     cv2.VideoWriter_fourcc("I", "", "", ""),

     fps,

     size

 )

 success, frame = cameraCapture.read()

 numFramesRemaining = 10 * fps - 1

 while success and numFramesRemaining:

     videoWriter.write(frame)

     success, frame = cameraCapture.read()

     numFramesRemaining -= 1

 cameraCapture.release()

 """

 如果使用一组摄像头或多个摄像头

 用grab和retrieve方法代替

 success0 = cameraCapture.grab()

 success1 = cameraCapture.grab()

 if success0 and success1:

     frame0 = cameraCapture0.retrieve()

     frame1 = cameraCapture1.retrieve()

 """