如何从url获取实时流？

Question

我使用的是RPi-cam网络接口，从pi相机，rasperry-pi不断地把图像扔到一个链接上，我想用opencv在我的计算机上处理该图像。在

这是sentdex建议我使用的link软件。在

这是一个link给sentdex的视频。在

要从中提取图像的流式处理URL 是它的外观，是从中提取图像的url。在

Answer 1

您是否尝试过在VideoCapture中传递您的url，如下所示：

cap = cv2.VideoCapture()
cap.opne("Your_URL")

Answer 2

如果你可以把你的RPI链接到VLC播放器，它应该为这个小部件工作。您可以使用^{}从url流式处理。将rtsp_stream_link更改为您的RPI url。在

from threading import Thread
import cv2

class RTSPVideoWriterObject(object):
    def __init__(self, src=0):
        # Create a VideoCapture object
        self.capture = cv2.VideoCapture(src)

        # Default resolutions of the frame are obtained (system dependent)
        self.frame_width = int(self.capture.get(3))
        self.frame_height = int(self.capture.get(4))

        # Set up codec and output video settings
        self.codec = cv2.VideoWriter_fourcc('M','J','P','G')
        self.output_video = cv2.VideoWriter('output.avi', self.codec, 30, (self.frame_width, self.frame_height))

        # Start the thread to read frames from the video stream
        self.thread = Thread(target=self.update, args=())
        self.thread.daemon = True
        self.thread.start()

    def update(self):
        # Read the next frame from the stream in a different thread
        while True:
            if self.capture.isOpened():
                (self.status, self.frame) = self.capture.read()

    def show_frame(self):
        # Display frames in main program
        if self.status:
            cv2.imshow('frame', self.frame)

        # Press Q on keyboard to stop recording
        key = cv2.waitKey(1)
        if key == ord('q'):
            self.capture.release()
            self.output_video.release()
            cv2.destroyAllWindows()
            exit(1)

    def save_frame(self):
        # Save obtained frame into video output file
        self.output_video.write(self.frame)

if __name__ == '__main__':
    rtsp_stream_link = 'your stream link!'
    video_stream_widget = RTSPVideoWriterObject(rtsp_stream_link)
    while True:
        try:
            video_stream_widget.show_frame()
            #video_stream_widget.save_frame()
        except AttributeError:
            pass