使用 OpenCV 和 Python 多处理进行恒定摄像头抓取

我一直在用Python从OpenCV摄像头读取图像，并从主程序读取最新的图像.这是因为硬件有问题.

在搞乱线程并获得非常低的效率(duh！)之后，我想切换到多处理.

以下是线程版本:

class WebcamStream:
    # initialization method
    def __init__(self, stream_id=0):
        self.stream_id = stream_id  # default is 0 for main camera

        # opening video capture stream
        self.camera = cv2.VideoCapture(self.stream_id)
        self.camera.set(cv2.CAP_PROP_FRAME_WIDTH, 3840)
        self.camera.set(cv2.CAP_PROP_FRAME_HEIGHT, 2880)

        if self.camera.isOpened() is False:
            print("[Exiting]: Error accessing webcam stream.")
            exit(0)

        # reading a single frame from camera stream for initializing
        _, self.frame = self.camera.read()

        # self.stopped is initialized to False
        self.stopped = True

        # thread instantiation
        self.t = Thread(target=self.update, args=())
        self.t.daemon = True  # daemon threads run in background

    # method to start thread
    def start(self):
        self.stopped = False
        self.t.start()

    # method passed to thread to read next available frame
    def update(self):
        while True:
            if self.stopped is True:
                break
            _, self.frame = self.camera.read()
        self.camera.release()

    # method to return latest read frame
    def read(self):
        return self.frame

    # method to stop reading frames
    def stop(self):
        self.stopped = True

以及-

if __name__ == "__main__":
    main_camera_stream = WebcamStream(stream_id=0)
    main_camera_stream.start()
    frame = main_camera_stream.read()

有人能帮我把这个翻译成多进程的土地吗？

谢谢