pyside2和opencv显示树莓派USB摄像头传过来的视频流

怎么用pyside2和opencv显示树莓派传过来的视频流

在qt designer里拖一个label，把类提升成QVideoWidget

然后需要一个USB摄像头连着树莓派，我使用motion推流，地址是http://192.168.137.2:8081/

接收代码为

from PySide2.QtWidgets import QApplication
from PySide2.QtUiTools import QUiLoader
from PySide2.QtGui import *

import threading
import cv2


class Video:
    def __init__(self):
        self.ui = QUiLoader().load('untitled.ui')

    def Open(self):
        url = "http://192.168.137.2:8081/"
        self.cap = cv2.VideoCapture(url)
        self.frameRate = self.cap.get(cv2.CAP_PROP_FPS)
        # 创建视频显示线程
        th = threading.Thread(target=self.Display)
        th.start()

    def Display(self):
        while self.cap.isOpened():
            success, frame = self.cap.read()
            # RGB转BGR
            frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)
            img = QImage(frame.data, frame.shape[1], frame.shape[0], QImage.Format_RGB888)
            self.ui.DisplayLabel.setPixmap(QPixmap.fromImage(img))
            #按比例填充
            self.ui.DisplayLabel.setSizePolicy(QSizePolicy.Ignored,QSizePolicy.Ignored)
            self.ui.DisplayLabel.setScaledContents(True)
            #cv2.waitKey(1)


if __name__ == '__main__':
    app = QApplication([])
    video = Video()
    video.ui.show()
    video.Open()
    app.exec_()