OpenCV从摄像头获取视频流并保存到本地

用ＯpenCV调取摄像头获取视频流，图片经过处理后保存到本地。

#coding:utf-8
import cv2 
    
# 获取视频流
cap = cv2.VideoCapture(0)
# 指定编码格式
fourcc = cv2.VideoWriter_fourcc(*'MJPG')
# cv2.VideoWriter的参数分别为：保存路径，编码格式，帧率，帧大小
out = cv2.VideoWriter("rest.avi", fourcc, 20.0, (640,480))

while(cap.isOpened()):
    ret, frame = cap.read()
    
    if ret==True:
        # 如果帧的大小与上述的(640, 480)不一致，需要resize
        out.write(frame)

        cv2.imshow('frame',frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break

cap.release()
out.release()
cv2.destroyAllWindows()