python+opencv实现USB摄像头图片存储

1.python+opencv实现USB摄像头图片存储

import cv2
import time


if __name__ == '__main__':
    # SunplusIT Inc 摄像头
    cap = cv2.VideoCapture(0)
    cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter.fourcc('M', 'J', 'P', 'G'))  # 视频流格式
    cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1960)
    cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)
    width = cap.get(3)
    height = cap.get(4)
    print(width, height, cap.get(5))
    i = 0
    while True:
        ret, frame = cap.read()
        if not ret:
            print("get camera frame is empty")
            break

        cv2.imshow("image", frame)
        "展示图片"
        cv2.imwrite(r"D:\picture\\" + str(i) + "screenshot.jpg", frame)
        "保存图片"
        i = i + 1
        if i == 50:
            time.sleep(100)
        print(time.time())

        key = cv2.waitKey(1) & 0xff
        "每帧数据延时 1ms，延时不能为 0，否则读取的结果会是静态帧"
        if key == ord('q'):
            break

    cap.release()
    cv2.destroyAllWindows()