python如何实现视频的读取与保存功能（代码实例）

#保存视频文件

import cv2

fourcc = cv2.VideoWriter_fourcc(*'XVID')#视频编码格式

out = cv2.VideoWriter('save.avi',fourcc,20,(640,480))#第三个参数为帧率，第四个参数为每帧大小

cap = cv2.VideoCapture(0)

while(True):

    ret,frame = cap.read()

    if(ret):

        cv2.imshow('input',frame)

        out.write(frame)

    else:

        break

    if(cv2.waitKey(1)==27):

        break

cap.release()

out.release()

cv2.destroyAllWindows()