如何连接其中的音量滑块以使其工作

Question

从PyQt5导入QtCore，QtWidgets，QtGui从PyQt5.QtCore导入Qt从PyQt5.QtMultimedia导入QMediaPlayer，QMediaContent，QMediaMetaData

从PyQt5.QtWidgets导入QApplication，QWidget，QInputDialog，QLineEdit，QFileDialog，QSlider

Ui_MainWinpage类（对象）：def setupUi（自我，MainWinpage）：MainWinpage.setObjectName（“ MainWinpage”）MainWinpage.resize（507，301）self.centralwidget = QtWidgets.QWidget（MainWinpage）self.centralwidget.setAutoFillBackground（True）self.centralwidget.setObjectName（“ centralwidget”）self.gridLayout = QtWidgets.QGridLayout（self.centralwidget）self.gridLayout.setObjectName（“ gridLayout”）#sliderself.horizo​​ntalSlider = QtWidgets.QSlider（self.centralwidget）self.horizo​​ntalSlider.setGeometry（QtCore.QRect（190，180，160，16））self.horizo​​ntalSlider.setOrientation（QtCore.Qt.Horizo​​ntal）self.horizo​​ntalSlider.setObjectName（“ horizo​​ntalSlider”）self.horizo​​ntalSlider.valueChanged [int] .connect（self.changeValue）self.gridLayout.addWidget（self.horizo​​ntalSlider，0，0，1，3）self.play_song = QtWidgets.QPushButton（self.centralwidget）self.play_song.setObjectName（“ play_song”）self.gridLayout.addWidget（self.play_song，1，0，1，1）self.pause_song = QtWidgets.QPushButton（self.centralwidget）self.pause_song.setObjectName（“ pause_song”）self.gridLayout.addWidget（self.pause_song，1，1，1，1）self.stop_song = QtWidgets.QPushButton（self.centralwidget）self.stop_song.setObjectName（“ stop_song”）self.gridLayout.addWidget（self.stop_song，1，2，1，1）self.previous = QtWidgets.QPushButton（self.centralwidget）self.previous.setObjectName（“ previous”）self.gridLayout.addWidget（self.previous，2，0，1，1）self.shuffle = QtWidgets.QPushButton（self.centralwidget）self.shuffle.setObjectName（“ shuffle”）self.gridLayout.addWidget（self.shuffle，2，1，1，1）self.next = QtWidgets.QPushButton（self.centralwidget）self.next.setObjectName（“ next”）self.gridLayout.addWidget（self.next，2，2，1，1）＃音量self.volumeSlider = QSlider（Qt.Horizo​​ntal）self.volumeSlider.setMaximum（32767）self.volumeSlider.setPageStep（1024）self.gridLayout.addWidget（self.volumeSlider，4，0，1，2）

    MainWinpage.setCentralWidget(self.centralwidget)
    self.menubar = QtWidgets.QMenuBar(MainWinpage)
    self.menubar.setGeometry(QtCore.QRect(0, 0, 507, 22))
    self.menubar.setObjectName("menubar")
    self.menufile = QtWidgets.QMenu(self.menubar)
    self.menufile.setObjectName("menufile")
    MainWinpage.setMenuBar(self.menubar)
    self.statusbar = QtWidgets.QStatusBar(MainWinpage)
    self.statusbar.setObjectName("statusbar")
    MainWinpage.setStatusBar(self.statusbar)
    self.actionopen = QtWidgets.QAction(MainWinpage)
    self.actionopen.setObjectName("actionopen")
    self.menufile.addAction(self.actionopen)
    self.menubar.addAction(self.menufile.menuAction())

    self.pushButton = QtWidgets.QPushButton(MainWinpage)

    self.pushButton.setObjectName("pushButton")
    #for Qtmultimedia
    self.media_player = QMediaPlayer()
    self.media_player.durationChanged.connect(self.horizontalSlider.setMaximum)
    self.media_player.positionChanged.connect(self.horizontalSlider.setValue)
    self.volumeSlider.valueChanged.connect(self.changeVolume)
    self.retranslateUi(MainWinpage)
    QtCore.QMetaObject.connectSlotsByName(MainWinpage)

def retranslateUi(self, MainWinpage):
    _translate = QtCore.QCoreApplication.translate
    MainWinpage.setWindowTitle(_translate("MainWinpage", "MainWindow"))
    self.play_song.setText(_translate("MainWinpage", "play"))
    self.pause_song.setText(_translate("MainWinpage", "pause"))
    self.stop_song.setText(_translate("MainWinpage", "stop"))
    self.previous.setText(_translate("MainWinpage", "previous"))
    self.shuffle.setText(_translate("MainWinpage", "shuffle"))
    self.next.setText(_translate("MainWinpage", "next"))
    self.menufile.setTitle(_translate("MainWinpage", "file"))
    self.actionopen.setText(_translate("MainWinpage", "open "))

    self.previous.setText(_translate("MainWinpage", "Browse"))
    self.previous.clicked.connect(self.pushButton_handler)
    self.play_song.clicked.connect(self.play_music)
    self.pause_song.clicked.connect(self.pause_music)
    self.stop_song.clicked.connect(self.stop_music)

def changeValue(self, value):
    blocked = self.media_player.blockSignals(True)
    value = self.horizontalSlider.value()
    self.media_player.setPosition(value)
    self.media_player.blockSignals(blocked)

def changeVolume(self, value):
    self.volume = value


def pushButton_handler(self):
    print("Button pressed")
    self.open_dialog_box()

#for opening that file which you want to open
def open_dialog_box(self):
    filename = QFileDialog.getOpenFileName()
    path = str(filename[0])
    self.media_player.setMedia(QMediaContent(QtCore.QUrl.fromLocalFile(path)))
    print("path is ",path)
    self.globalpath = path
    print("global paths is ", self.globalpath)

#for playing that file which we had choosen from
def play_music(self):
    artist = self.media_player.metaData(QMediaMetaData.AlbumArtist)
    title = self.media_player.metaData(QMediaMetaData.Title)
    self.media_player.play()
    print("song name:",self.globalpath)
    print(f"Now playing: {title} by {artist}")

#for pause that selected music
def pause_music(self):
    self.media_player.pause()
    print("song is paused")

#for stoping that music
def stop_music(self):
    self.media_player.stop()
    print("song is stopped")

如果名称 ==“ 主”：导入系统应用= QtWidgets.QApplication（sys.argv）MainWinpage = QtWidgets.QMainWindow（）ui = Ui_MainWinpage（）ui.setupUi（MainWinpage）MainWinpage.show（）sys.exit（app.exec _（））

Answer 1

代替使用pygame.mixer，您可以考虑使用PyQt5.QtMultimedia.QMediaPlayer。这样做的好处是，当歌曲的持续时间和/或当前位置已更改时，QMediaPlayer会发出信号，您可以使用它来更新滑块的位置和最大值。歌曲的元数据（标题，艺术家等）可以通过QMediaPlayer.metaData访问，例如

from PyQt5.QtMultimedia import QMediaPlayer, QMediaContent, QMediaMetaData

class Ui_MainWinpage(object):
    def setupUi(self, MainWinpage):
        ....
        self.media_player = QMediaPlayer()
        self.media_player.durationChanged.connect(self.horizontalSlider.setMaximum)
        self.media_player.positionChanged.connect(self.horizontalSlider.setValue)

    def changeValue(self, value):
        blocked = self.media_player.blockSignals(True)
        value = self.horizontalSlider.value()
        self.media_player.setPosition(value)
        self.media_player.blockSignals(blocked)

    def open_dialog_box(self):
        filename = QFileDialog.getOpenFileName()
        path = str(filename[0])
        self.media_player.setMedia(QMediaContent(QtCore.QUrl.fromLocalFile(path)))
        print("path is ",path)
        self.globalpath = path

    def play_music(self):
        artist = self.media_player.metaData(QMediaMetaData.AlbumArtist)
        title = self.media_player.metaData(QMediaMetaData.Title)
        self.media_player.play()
        print(f"Now playing: {title} by {artist}")

    def pause_music(self):
        self.media_player.pause()
        print("song is paused")

    def stop_music(self):
        self.media_player.stop()
        print("song is stopped")

Answer 2

要使滑块显示正在播放的歌曲的实时位置，请使用

• PyQt计时器，例如How to create a timer in pyqt
• [pygame.mixer.music.get_pos()以获取歌曲的当前位置（无论如何）
• [setValue（可能还有滑块上的setRange。

似乎没有一个API可以找出PyGame混音器当前正在播放的歌曲多长时间，因此可能会带来额外的障碍。