class QmyMainWindow(QMainWindow): def __init__(self, parent=None): super().__init__(parent) #调用父类构造函数,创建窗体 self.ui = Ui_MainWindow() #创建UI对象 self.ui.setupUi(self) #构造UI界面 self.player = QMediaPlayer(self) #创建视频播放器 self.player.setNotifyInterval(1000) #信息更新周期, ms scene = QGraphicsScene(self) self.ui.graphicsView.setScene(scene) self.videoItem = QGraphicsVideoItem() #视频显示画面 self.videoItem.setSize(QSizeF(320, 220)) self.videoItem.setFlag(QGraphicsItem.ItemIsMovable) self.videoItem.setFlag(QGraphicsItem.ItemIsSelectable) self.videoItem.setFlag(QGraphicsItem.ItemIsFocusable) scene.addItem(self.videoItem) self.player.setVideoOutput(self.videoItem) #设置视频显示图形项 self.textItem = QGraphicsTextItem("面朝大海,春暖花开") #弹幕文字 font = self.textItem.font() font.setPointSize(20) self.textItem.setFont(font) self.textItem.setDefaultTextColor(Qt.red) self.textItem.setPos(100, 220) self.textItem.setFlag(QGraphicsItem.ItemIsMovable) self.textItem.setFlag(QGraphicsItem.ItemIsSelectable) self.textItem.setFlag(QGraphicsItem.ItemIsFocusable) scene.addItem(self.textItem) self.ui.btnText.setCheckable(True) #弹幕文字按钮 self.ui.btnText.setChecked(True) self.__duration = "" self.__curPos = "" self.player.stateChanged.connect(self.do_stateChanged) self.player.positionChanged.connect(self.do_positionChanged) self.player.durationChanged.connect(self.do_durationChanged) ## ==============自定义功能函数======================== ## ==============event处理函数========================== def closeEvent(self, event): #窗体关闭时 # 窗口关闭时不能自动停止播放,需手动停止 if (self.player.state() == QMediaPlayer.PlayingState): self.player.stop() ## ==========由connectSlotsByName()自动连接的槽函数============ @pyqtSlot() ##打开文件 def on_btnOpen_clicked(self): curPath = QDir.currentPath() #获取系统当前目录 ## curPath=os.getcwd() title = "选择视频文件" filt = "视频文件(*.wmv *.avi);;所有文件(*.*)" fileName, flt = QFileDialog.getOpenFileName(self, title, curPath, filt) if (fileName == ""): return fileInfo = QFileInfo(fileName) baseName = fileInfo.fileName() ## baseName=os.path.basename(fileName) self.ui.LabCurMedia.setText(baseName) curPath = fileInfo.absolutePath() QDir.setCurrent(curPath) #重设当前目录 media = QMediaContent(QUrl.fromLocalFile(fileName)) self.player.setMedia(media) #设置播放文件 self.player.play() @pyqtSlot() ##播放 def on_btnPlay_clicked(self): self.player.play() @pyqtSlot() ##暂停 def on_btnPause_clicked(self): self.player.pause() @pyqtSlot() ##停止 def on_btnStop_clicked(self): self.player.stop() @pyqtSlot() ##全屏 def on_btnFullScreen_clicked(self): self.videoWidget.setFullScreen(True) @pyqtSlot() ##静音按钮 def on_btnSound_clicked(self): mute = self.player.isMuted() self.player.setMuted(not mute) if mute: self.ui.btnSound.setIcon(QIcon(":/icons/images/volumn.bmp")) else: self.ui.btnSound.setIcon(QIcon(":/icons/images/mute.bmp")) @pyqtSlot(int) ##音量调节 def on_sliderVolumn_valueChanged(self, value): self.player.setVolume(value) @pyqtSlot(int) ##播放进度调节 def on_sliderPosition_valueChanged(self, value): self.player.setPosition(value) @pyqtSlot() ##放大 def on_btnZoomIn_clicked(self): sc = self.videoItem.scale() self.videoItem.setScale(sc + 0.1) @pyqtSlot() ##缩小 def on_btnZoomOut_clicked(self): sc = self.videoItem.scale() self.videoItem.setScale(sc - 0.1) @pyqtSlot(bool) ##弹幕 def on_btnText_clicked(self, checked): self.textItem.setVisible(checked) ## =============自定义槽函数=============================== def do_stateChanged(self, state): isPlaying = (state == QMediaPlayer.PlayingState) self.ui.btnPlay.setEnabled(not isPlaying) self.ui.btnPause.setEnabled(isPlaying) self.ui.btnStop.setEnabled(isPlaying) def do_durationChanged(self, duration): self.ui.sliderPosition.setMaximum(duration) secs = duration / 1000 #秒 mins = secs / 60 #分钟 secs = secs % 60 #余数秒 self.__duration = "%d:%d" % (mins, secs) self.ui.LabRatio.setText(self.__curPos + "/" + self.__duration) def do_positionChanged(self, position): if (self.ui.sliderPosition.isSliderDown()): return #如果正在拖动滑条,退出 self.ui.sliderPosition.setSliderPosition(position) secs = position / 1000 #秒 mins = secs / 60 #分钟 secs = secs % 60 #余数秒 self.__curPos = "%d:%d" % (mins, secs) self.ui.LabRatio.setText(self.__curPos + "/" + self.__duration)