pyqt5+opencv 显示视频流

核心代码：

使用Labe组件显示图像，核心部分的代码如下：

程序最后的效果：

整个main.py文件代码如下：

MainWindow.ui转换为MainWindow.py代码如下：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file MainWindow.ui
#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(713, 629)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(20, 20, 101, 31))
        self.label.setObjectName("label")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(570, 540, 93, 28))
        self.pushButton.setObjectName("pushButton")
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setGeometry(QtCore.QRect(20, 50, 640, 480))
        self.widget.setObjectName("widget")
        self.img_label = QtWidgets.QLabel(self.widget)
        self.img_label.setGeometry(QtCore.QRect(0, 0, 640, 480))
        self.img_label.setObjectName("img_label")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 713, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "videostream"))
        self.pushButton.setText(_translate("MainWindow", "open"))
        self.img_label.setText(_translate("MainWindow", "                                  视频播放区域"))