Pyqt报错：arguments did not match any overloaded call

详细报错信息：

TypeError: arguments did not match any overloaded call:
setVideoOutput(self, QVideoWidget): argument 1 has unexpected type 'QWidget'
setVideoOutput(self, QGraphicsVideoItem): argument 1 has unexpected type 'QWidget'
setVideoOutput(self, QAbstractVideoSurface): argument 1 has unexpected type 'QWidget'
setVideoOutput(self, Iterable[QAbstractVideoSurface]): argument 1 has unexpected type 'QWidget'

Process finished with exit code 0

解决方案：

将QtWidgets.QWidget更换为QVideoWidget：

修改之后：

原本：

源代码（修改之后的）：

GUI：

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

# Form implementation generated from reading ui file '.\untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.2
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtMultimediaWidgets import QVideoWidget

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1134, 858)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.wgt_video = QVideoWidget(self.centralwidget)
        self.wgt_video.setGeometry(QtCore.QRect(230, 90, 641, 451))
        self.wgt_video.setObjectName("wgt_video")
        self.btn_open = QtWidgets.QPushButton(self.centralwidget)
        self.btn_open.setGeometry(QtCore.QRect(240, 650, 93, 28))
        self.btn_open.setObjectName("btn_open")
        self.btn_play = QtWidgets.QPushButton(self.centralwidget)
        self.btn_play.setGeometry(QtCore.QRect(490, 650, 93, 28))
        self.btn_play.setObjectName("btn_play")
        self.btn_stop = QtWidgets.QPushButton(self.centralwidget)
        self.btn_stop.setGeometry(QtCore.QRect(760, 650, 93, 28))
        self.btn_stop.setObjectName("btn_stop")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1134, 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.btn_open.setText(_translate("MainWindow", "打开"))
        self.btn_play.setText(_translate("MainWindow", "播放"))
        self.btn_stop.setText(_translate("MainWindow", "暂停"))

main：

from PyQt5.QtWidgets import *
from PyQt5.QtMultimedia import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtMultimediaWidgets import QVideoWidget
from GUI import Ui_MainWindow
import sys


class myMainWindow( Ui_MainWindow,QMainWindow):
    def __init__(self):
        super(Ui_MainWindow, self).__init__()
        self.setupUi(self)


        self.player = QMediaPlayer()
        self.player.setVideoOutput(self.wgt_video)  # 设置播放设备。播放设备是视频窗口对象
        self.btn_open.clicked.connect(self.openVideoFile)  # 打开视频文件按钮
        self.btn_play.clicked.connect(self.playVideo)  # play
        self.btn_stop.clicked.connect(self.pauseVideo)  # pause
        self.player.positionChanged.connect(self.changeSlide)  # change Slide

    def openVideoFile(self):
        self.player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))  # 选取视频文件
        self.player.play()  # 播放视频

    def playVideo(self):
        self.player.play()

    def pauseVideo(self):
        self.player.pause()

    def changeSlide(self, position):
        self.vidoeLength = self.player.duration() + 0.1
        self.sld_video.setValue(round((position / self.vidoeLength) * 100))
        self.lab_video.setText(str(round((position / self.vidoeLength) * 100, 2)) + '%')



if __name__ == "__main__":
    app = QApplication(sys.argv)    # 创建QApplication对象，作为GUI主程序入口
    vieo_gui = myMainWindow()
    vieo_gui.show()
    sys.exit(app.exec_())   # 循环中等待退出程序

吐槽：

最近因为比赛原因刚学qt，想着快，就直接入手别人的代码改，但是遇到很多问题；上面这个问题是，我用qt的designer画了一个播放器界面，播放器的区域用了Qlebal这个类，然后导出为py文件，主程序中调用，就出现了这个问题； 经某qt大哥指点，是：setVideoOutput 这个函数不认识设置的widget对象，这应该是我设置错模板类了？后续继续学习…