OpenCV-Python 视频读取

 1 import numpy as np
 2 import cv2
 3 # 读取视频文件
 4 cap = cv2.VideoCapture(‘./law.mp4‘)
 5 # 或者电影每秒的帧数
 6 fps = cap.get(cv2.CAP_PROP_FPS)
 7 # 判断视频是否一直打开
 8 while (cap.isOpened()):
 9     success,frame = cap.read()
10     # 视频显示
11     cv2.imshow(‘law‘, frame)
12     # 设置窗口
13     cv2.resizeWindow(‘law‘, 512,288)
14     # 判断退出条件
15     if cv2.waitKey(int(1000//fps)) ==ord(‘q‘):
16         break
17 # 清除缓存退出
18 cv2.destroyAllWindows()

 1 # 值为0表示调取摄像头
 2 cap = cv2.VideoCapture(0)
 3 
 4 while (cap.isOpened()):
 5     sucess,frame = cap.read()
 6     cv2.imshow(‘capture‘, frame)
 7     if cv2.waitKey(41) == ord(‘q‘):
 8         break
 9 # 关闭摄像头
10 cap.release()
11 cv2.destroyAllWindows()