python+Pyqt5+Qtdesigner 做一个简单的视频播放器

适合新手看看。

我只用了光电那边的播放界面。凑合理解一下。

利用Qtdesigner创建一个UI界面。

上面的QWidget需要提升为：

提升的类名称为QVideoWidget，头文件为PyQt5.QtMultimediaWidgets

 然后  .ui 转为  .py 文件  ，这一步百度都有。

我保存的文件名是  rador.py。

代码如下：

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

# Form implementation generated from reading ui file 'rador.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# 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


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1066, 765)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.splitter = QtWidgets.QSplitter(self.centralwidget)
        self.splitter.setGeometry(QtCore.QRect(200, 40, 891, 20))
        self.splitter.setOrientation(QtCore.Qt.Horizontal)
        self.splitter.setObjectName("splitter")
        self.lab_rador = QtWidgets.QLabel(self.splitter)
        self.lab_rador.setObjectName("lab_rador")
        self.lab_camera = QtWidgets.QLabel(self.splitter)
        self.lab_camera.setObjectName("lab_camera")
        self.layoutWidget = QtWidgets.QWidget(self.centralwidget)
        self.layoutWidget.setGeometry(QtCore.QRect(10, 60, 1031, 501))
        self.layoutWidget.setObjectName("layoutWidget")
        self.gridLayout = QtWidgets.QGridLayout(self.layoutWidget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")
        self.wdt_rador = QVideoWidget(self.layoutWidget)
        self.wdt_rador.setAutoFillBackground(True)
        self.wdt_rador.setObjectName("wdt_rador")
        self.gridLayout.addWidget(self.wdt_rador, 0, 0, 1, 1)
        self.wdt_camera = QVideoWidget(self.layoutWidget)
        self.wdt_camera.setAutoFillBackground(True)
        self.wdt_camera.setStyleSheet("color:rgb(0, 0, 0)")
        self.wdt_camera.setObjectName("wdt_camera")
        self.gridLayout.addWidget(self.wdt_camera, 0, 1, 1, 1)
        self.splitter_3 = QtWidgets.QSplitter(self.centralwidget)
        self.splitter_3.setGeometry(QtCore.QRect(30, 670, 631, 23))
        self.splitter_3.setOrientation(QtCore.Qt.Horizontal)
        self.splitter_3.setObjectName("splitter_3")
        self.splitter_2 = QtWidgets.QSplitter(self.splitter_3)
        self.splitter_2.setOrientation(QtCore.Qt.Horizontal)
        self.splitter_2.setObjectName("splitter_2")
        self.btn_open = QtWidgets.QPushButton(self.splitter_2)
        self.btn_open.setObjectName("btn_open")
        self.btn_stop = QtWidgets.QPushButton(self.splitter_2)
        self.btn_stop.setObjectName("btn_stop")
        self.btn_play = QtWidgets.QPushButton(self.splitter_2)
        self.btn_play.setObjectName("btn_play")
        self.btn_quit = QtWidgets.QPushButton(self.splitter_3)
        self.btn_quit.setObjectName("btn_quit")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1066, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.btn_quit.clicked.connect(MainWindow.close)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.lab_rador.setText(_translate("MainWindow", "雷达"))
        self.lab_camera.setText(_translate("MainWindow", "光电"))
        self.btn_open.setText(_translate("MainWindow", "打开"))
        self.btn_stop.setText(_translate("MainWindow", "暂停"))
        self.btn_play.setText(_translate("MainWindow", "播放"))
        self.btn_quit.setText(_translate("MainWindow", "退出"))
from PyQt5.QtMultimediaWidgets import QVideoWidget

然后再新建一个 .py 文件。名字随便。

代码如下：

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

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


        # 播放器
        self.player = QMediaPlayer()
        self.player.setVideoOutput(self.wdt_camera)
        # 按钮打开文件
        self.btn_open.clicked.connect(self.openVideoFile)
        # 播放
        self.btn_play.clicked.connect(self.playVideo)  # play
        # 暂停
        self.btn_stop.clicked.connect(self.pauseVideo)  # pause



    def openVideoFile(self):
        self.player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))
        self.player.play()
        print(self.player.availableMetaData())

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

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



# if __name__ == '__main__':
#     app = QApplication(sys.argv)
#     mainWindow = QMainWindow()
#     ui = Ui_MainWindow()
#     ui.setupUi(mainWindow)
#     mainWindow.show()
#     sys.exit(app.exec_())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    vieo_gui = myMainWindow()
    vieo_gui.show()
    sys.exit(app.exec_())

运行：这个文件。结果如下

 

有些格式的视频，比如MP4格式的视频不能打开，需要下载转码器。百度有。

avi格式的是可以打开的