python-----从本地摄像头和网络摄像头截取图片

import cv2

# 获取本地摄像头
# folder_path 截取图片的存储目录
def get_img_from_camera_local(folder_path):
    cap = cv2.VideoCapture(0)
    i = 1
    while True:
        ret, frame = cap.read()
        cv2.imshow("capture", frame)
        print str(i)
        cv2.imwrite(folder_path + str(i) + '.jpg', frame)  # 存储为图像
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
        i += 1
    cap.release()
    cv2.destroyAllWindows()

# 获取网络摄像头，格式：rtsp://username:pwd@ip/
# folder_path 截取图片的存储目录
def get_img_from_camera_net(folder_path):
    cap = cv2.VideoCapture('rtsp://username:pwd@ip/')
    i = 1
    while True:
        ret, frame = cap.read()
        cv2.imshow("capture", frame)
        print str(i)
        cv2.imwrite(folder_path + str(i) + '.jpg', frame)  # 存储为图像
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
        i += 1
    cap.release()
    cv2.destroyAllWindows()

# 测试
if __name__ == '__main__':
    folder_path = 'D:\img_from_camera\'
    get_img_from_camera_local(folder_path)

原文：https://blog.csdn.net/weixin_41667664/article/details/80079924