python中Pyqt5使用Qlabel标签进行视频播放

from PyQt5.QtCore import QTimer

self.timer_camera = QTimer()

self.timer_camera.start(1000)   # 1000ms == 1s
self.timer_camera.timeout.connect(self.openFrame)  # 连接槽函数openFrame

from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.uic import loadUiType
import cv2
import sys
vedio_ui, _ = loadUiType('./UI/vedio.ui')

class VedioGui(QMainWindow, vedio_ui):
    # 定义构造方法
    def __init__(self):
        QMainWindow.__init__(self)
        self.setupUi(self)
        self.timer_camera = QTimer()
        self.handle_buttons()
        self.open_vedio()
    # 所有Button的消息与槽的通信
    def handle_buttons(self):
        self.btn_Start.clicked.connect(self.Btn_Start)
        self.btn_Stop.clicked.connect(self.Btn_Stop)
    def Btn_Start(self):
        # 定时器开启，每隔一段时间，读取一帧
        self.timer_camera.start(100)
        self.timer_camera.timeout.connect(self.OpenFrame)
    def Btn_Stop(self):
        # self.cap.release()
        self.timer_camera.stop()
    def open_vedio(self):
        """选取视频文件"""
        # 这里以mp4和avi视频播放为例
        openfile_name = QFileDialog.getOpenFileName(self, 'chose files', '', 'Image files(*.mp4 *.avi)')  # 打开文件选择框选择文件
        self.file_name = openfile_name[0]  # 获取图片名称

        # 得到文件后缀名  需要根据情况进行修改
        suffix = self.file_name.split("/")[-1][self.file_name.split("/")[-1].index(".") + 1:]
        # print(self.file_name, suffix)
        if self.file_name == '':
            pass
        elif suffix == "mp4" or suffix == "avi":
            self.cap = cv2.VideoCapture(self.file_name)
    def OpenFrame(self):
        ret, image = self.cap.read()
        if ret:
            if len(image.shape) == 3:
                image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
                vedio_img = QImage(image.data, image.shape[1], image.shape[0], QImage.Format_RGB888)
            elif len(image.shape) == 1:
                vedio_img = QImage(image.data, image.shape[1], image.shape[0], QImage.Format_Indexed8)
            else:
                vedio_img = QImage(image.data, image.shape[1], image.shape[0], QImage.Format_RGB888)
            self.vedio_label.setPixmap(QPixmap(vedio_img))
            self.vedio_label.setScaledContents(True)  # 自适应窗口
        else:
            self.cap.release()
            self.timer_camera.stop()

    # 界面关闭事件，询问用户是否关闭
    def closeEvent(self, event):
        reply = QMessageBox.question(self, '退出', "是否要退出该界面？",
                                     QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
        if reply == QMessageBox.Yes:
            self.close()
            event.accept()
        else:
            event.ignore()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = VedioGui()
    window.show()
    sys.exit(app.exec_())