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详解QT基于Mplayer媒体播放器应用教程
QT基于Mplayer媒体播放器应用教程是本文要介绍的内容，主要是来了解并学习QT总媒体播放器的应用，本文通过代码来实现QT基于mplayer播放器的案例，具体代码的实现来看内容。播放器全屏音量时间进度都已经实现,追加快捷键设计...MAINWINDOW.H &#ifndefMAINWINDOW_H &#defineMAINWINDOW_H &#include &#include &#include &#include &#include &#include &namespaceUi{ &classMainW &} &classMainWindow:publicQMainWindow &{ &Q_OBJECT &public: &explicitMainWindow(QWidget*parent=0); &~MainWindow(); &private: &Ui::MainWindow* &QProcess*mplayerP &QS &QTimer* &QWidget*w; &QDockWidget*shapesDockWidget1; &QDockWidget*shapesDockWidget2; &QTimer* &QAction*at2; &QAction*at3; &QAction*at4; &QAction*at5; &QMenu* &QPointm_dragP &privateslots: &voidon_textEdit_3_textChanged(); &voidon_spinBox_editingFinished(); &voidon_spinBox_valueChanged(int); &voidwriteSettings(); &voidreadSettings(); &voidon_pushButton_10_clicked(); &voidon_pushButton_9_clicked(); &voidon_pushButton_6_clicked(); &voidon_pushButton_5_clicked(); &voidon_pushButton_3_clicked(); &voidon_pushButton_2_clicked(); &voidon_horizontalSlider_2_valueChanged(intvalue); &voidon_pushButton_8_clicked(); &voidon_pushButton_clicked(); &voidon_pushButton_7_clicked(); &voidon_pushButton_4_clicked(); &voidtimeLineChanged(intpos); &voidpollCurrentTime(); &voidreject(); &voidenterFullScreen(); &voidenter(); &voidcloseEvent(QCloseEvent*ex); &voidcontextMenuEvent(QContextMenuEvent*event); &voidmouseMoveEvent(QMouseEvent*event); &voidmousePressEvent(QMouseEvent*event); &booleventFilter(QObject*obj,QEvent*ev); &}; &&#endif//MAINWINDOW_H &MAINWINDOW.cpp &#include&mainwindow.h& &#include&ui_mainwindow.h& &#include&QProcess& &#include &#include &#include &#include &#include &#include &#include &#include &#include &#include &#include &#include &#include &#include &&MainWindow::MainWindow(QWidget*parent): &&QMainWindow(parent), &ui(newUi::MainWindow) &{ &ui-setupUi(this); &&mplayerProcess=newQProcess(this); &shapesDockWidget1=newQDockWidget(QString::fromLocal8Bit(&播放界面&)); &shapesDockWidget1-setWidget(ui-widget_4); &shapesDockWidget2=newQDockWidget(QString::fromLocal8Bit(&播放时间&)); &shapesDockWidget2-setWidget(ui-widget_2); &&//QWidget*wi=newQWidget(this); &//wi-resize(400,300); &addDockWidget(Qt::BottomDockWidgetArea,shapesDockWidget1); &addDockWidget(Qt::BottomDockWidgetArea,shapesDockWidget2); &&shapesDockWidget2-show(); &QVBoxLayout*vLayout=newQVBoxLayout(this); &vLayout-addWidget(ui-widget); &w=newQWidget(this); &w-setLayout(vLayout); &this-setCentralWidget(w); &poller=newQTimer(this); &interval=newQTimer(this); &connect(interval,SIGNAL(timeout()),this,SLOT(reject())); &interval-start(1000); &connect(ui-horizontalSlider,SIGNAL(sliderMoved(int)),this,SLOT(timeLineChanged(int))); &connect(mplayerProcess,SIGNAL(readyReadStandardOutput()),this,SLOT(reject())); &connect(poller,SIGNAL(timeout()),this,SLOT(pollCurrentTime())); &//setWindowOpacity(0.95); &QPaletteplt=palette(); &//plt.setColor(QPalette::Background,QColor(&Black&)); &plt.setColor(QPalette::Background,QColor(&Grey&)); &this-setPalette(plt); &ui-label_4-setText(QString::fromLocal8Bit(&不是全屏&)); &w-setAutoFillBackground(true); &QAction*at1=newQAction(&进入全屏&,this); &this-addAction(at1); &this-setAcceptDrops(true); &at1-setShortcuts(QList()&//connect(at1,SIGNAL(triggered()),this,SLOT(enterFullScreen())); &at2=newQAction(QString::fromLocal8Bit(&暂停/开始&),this); &this-addAction(at2); &this-setAcceptDrops(true); &at2-setShortcuts(QList()&(at2,SIGNAL(triggered()),this,SLOT(enter())); &at3=newQAction(QString::fromLocal8Bit(&全屏&),this); &this-addAction(at3); &this-setAcceptDrops(true); &at3-setShortcuts(QList()&(at3,SIGNAL(triggered()),ui-pushButton_5,SLOT(click())); &at4=newQAction(QString::fromLocal8Bit(&退出全屏&),this); &this-addAction(at4); &this-setAcceptDrops(true); &at4-setShortcuts(QList()&(at4,SIGNAL(triggered()),ui-pushButton_6,SLOT(click())); &at5=newQAction(QString::fromLocal8Bit(&打开&),this); &this-addAction(at5); &this-setAcceptDrops(true); &at5-setShortcuts(QList()&(at5,SIGNAL(triggered()),ui-pushButton_4,SLOT(click())); &QAction*at6=newQAction(&前进&,this); &this-addAction(at6); &this-setAcceptDrops(true); &at6-setShortcuts(QList()&(at6,SIGNAL(triggered()),ui-pushButton_9,SLOT(click())); &QAction*at7=newQAction(&后退&,this); &this-addAction(at7); &this-setAcceptDrops(true); &at7-setShortcuts(QList()&(at7,SIGNAL(triggered()),ui-pushButton_10,SLOT(click())); &QAction*at8=newQAction(&提高音量&,this); &this-addAction(at8); &this-setAcceptDrops(true); &at8-setShortcuts(QList()&(at8,SIGNAL(triggered()),ui-pushButton_2,SLOT(click())); &QAction*at9=newQAction(&降低&,this); &this-addAction(at9); &this-setAcceptDrops(true); &at9-setShortcuts(QList()&(at9,SIGNAL(triggered()),ui-pushButton_3,SLOT(click())); &this-readSettings(); &w-installEventFilter(this); &intx=(QApplication::desktop()-width()-this-width())/2; &inty=(QApplication::desktop()-height()-this-height())/2; &this-move(x,y); &this-resize(800,600); &//QDesktopWidget*desktop=QApplication::desktop(); &//intwidth=desktop-width(); &//intheight=desktop-height(); &} &voidMainWindow::enterFullScreen() &{ &mplayerProcess-write(&vo_fullscreen/n&); &&} &voidMainWindow::enter() &{ &if(ui-label_6-text()==QString::fromLocal8Bit(&开始&)) &{ &mplayerProcess-write(&pause/n&); &&poller-stop(); &ui-label_6-setText(QString::fromLocal8Bit(&暂停&)); &} &elseif(ui-label_6-text()==QString::fromLocal8Bit(&暂停&)) &{ &mplayerProcess-write(&pause/n&); &mplayerProcess-write(&get_time_length/n&); &poller-start(10); &ui-label_6-setText(QString::fromLocal8Bit(&开始&)); &} &} &&MainWindow::~MainWindow() &{ & &} &&voidMainWindow::pollCurrentTime() &&{ &mplayerProcess-write(&get_time_pos/n&); &//qDebug()text(); &//log-append(QString(buffer)); &ui-textEdit-setText(QString::number(ui-horizontalSlider-maximum()/3600)+&:&+QString::number((ui-horizontalSlider-maximum()/60)%60)+&:&+QString::number(ui-horizontalSlider-maximum()%60)); &ui-textEdit_2-setText(QString::number(ui-horizontalSlider-value()/3600)+&:&+QString::number((ui-horizontalSlider-value()/60)%60)+&:&+QString::number(ui-horizontalSlider-value()%60)); &} &&voidMainWindow::reject() &{ &&this-setFocus(); &//ui-label_5-setText(QString::number(ui-horizontalSlider-maximum()/3600)+&:&+QString::number((ui-horizontalSlider-maximum()/60)%60)+&:&+QString::number(ui-horizontalSlider-maximum()%60)); &//ui-label_5-setText(QString::number(ui-horizontalSlider-value()/3600)+&:&+QString::number((ui-horizontalSlider-value()/60)%60)+&:&+QString::number(ui-horizontalSlider-value()%60)); &&while(mplayerProcess-canReadLine()) &&{ &QByteArraybuffer(mplayerProcess-readLine()); &ui-textEdit_3-append(QString(buffer)); &//qDebug()&//log-append(QString(buffer)); &//Onv&rifiesionaeudesr&ponses &//r&ponse&get_video_resolution:ANS_VIDEO_RESOLUTION='x'&if(buffer.startsWith(&ANS_VIDEO_RESOLUTION&)) &{ &buffer.remove(0,21);//vireANS_VIDEO_RESOLUTION= &&buffer.replace(QByteArray(&'&),QByteArray(&&)); &buffer.replace(QByteArray(&&),QByteArray(&&)); &buffer.replace(QByteArray(&/n&),QByteArray(&&)); &buffer.replace(QByteArray(&/r&),QByteArray(&&)); &intsepIndex=buffer.indexOf('x'); &intresX=buffer.left(sepIndex).toInt(); &intresY=buffer.mid(sepIndex+1).toInt(); &ui-widget-setMinimumSize(resX,resY); &} &&//r&ponse&get_time_length:ANS_LENGTH=xx.yy &elseif(buffer.startsWith(&ANS_LENGTH&)) &{ &buffer.remove(0,11);//vireANS_LENGTH= &&buffer.replace(QByteArray(&'&),QByteArray(&&)); &buffer.replace(QByteArray(&&),QByteArray(&&)); &buffer.replace(QByteArray(&/n&),QByteArray(&&)); &buffer.replace(QByteArray(&/r&),QByteArray(&&)); &floatmaxTime=buffer.toFloat(); &ui-horizontalSlider-setMaximum(static_cast(maxTime+1)); &} &//r&ponse&get_time_pos:ANS_TIME_POSITION=xx.y &elseif(buffer.startsWith(&ANS_TIME_POSITION&)) &{ &buffer.remove(0,18);//vireANS_TIME_POSITION= &buffer.replace(QByteArray(&'&),QByteArray(&&)); &buffer.replace(QByteArray(&&),QByteArray(&&)); &buffer.replace(QByteArray(&/n&),QByteArray(&&)); &buffer.replace(QByteArray(&/r&),QByteArray(&&)); &floatcurrTime=buffer.toFloat(); &ui-horizontalSlider-setValue(static_cast(currTime+1)); &} &} &} &voidMainWindow::timeLineChanged(intpos) &{ &mplayerProcess-write(QString(&seek&+QString::number(pos)+&2/n&).toUtf8()); &} &voidMainWindow::on_pushButton_4_clicked() &{ &filename=QFileDialog::getOpenFileName(this,QString::fromLocal8Bit(&文件类型&),&.&,QString::fromLocal8Bit(&文问类型(*.*)&)); &if(filename!=NULL) &{ &poller-stop(); &mplayerProcess-close(); &this-setWindowTitle(filename); &ui-pushButton_7-setEnabled(true); &mplayerProcess=newQProcess(this); &QStringexefile=QCoreApplication::applicationDirPath()+&/mplayer/mplayer.exe&; &qDebug()&//qDebug()&; &args&-slave&; &//Etonveutnepasavoirtropdechoseparser:) &args&-zoom&; &//args&-quiet&; &//args&-xy1024&; &//args&-wid&(w-winId()))&-x&&1680&&-y&&1050&; &args&-wid&(w-winId())); &args&-vo&&direct3d&; &//args&-vo&&gl&; &//vo=gl&//direct3d &//mplayer-fs-zoom-vofbdev-xy1024filename &args&setProcessChannelMode(QProcess::MergedChannels); &mplayerProcess-start(exefile,args); &if(!mplayerProcess-waitForStarted(3000)) &{ &qDebug(&allez,cherchelebug:o&); &} &//Onr&cup&relesinfosdebase &mplayerProcess-write(&get_video_resolution/n&); &mplayerProcess-write(&get_time_length/n&); &mplayerProcess-write(&get_time_length/n&); &//mplayerProcess-write(&get_time_pos/n&); &poller-start(10); &//mplayerProcess-write(&pause/n&); &ui-label_6-text()==&开始&; &} &} &voidMainWindow::on_pushButton_7_clicked() &{ &if(ui-label_6-text()==QString::fromLocal8Bit(&开始&)) &{ &mplayerProcess-write(&pause/n&); &poller-stop(); &ui-label_6-setText(QString::fromLocal8Bit(&暂停&)); &} &elseif(ui-label_6-text()==QString::fromLocal8Bit(&暂停&)) &{ &mplayerProcess-write(&pause/n&); &mplayerProcess-write(&get_time_length/n&); &poller-start(10); &ui-label_6-setText(QString::fromLocal8Bit(&开始&)); &} &} &voidMainWindow::on_pushButton_clicked() &{ &&mplayerProcess-write(&vo_fullscreen/n&); &} &voidMainWindow::on_pushButton_8_clicked() &{ &QMessageBox::information(this,QString::fromLocal8Bit(&AboutMdieaPlayer&), &&QString::fromLocal8Bit(&快捷键说明:/n打开:A/n暂停/开始:space/n全屏:D/n取消全屏:S/n快进:
right/n后退:left/n音量提高:top/n音量降低:down/nID:Jammy基于mplayer开发版本0.06&)); &} &voidMainWindow::on_horizontalSlider_2_valueChanged(intvalue) &{ & &QSQByteArraystr1; &mplayerProcess-write(&volume&+str1+&/n&); &i=-(40-value);str=QString::number(i); &strstr1=str.toAscii(); &mplayerProcess-write(&volume&+str1+&/n&); &//qDebug()&} &voidMainWindow::on_pushButton_2_clicked() &{ &mplayerProcess-write(&volume+1/n&); &} &voidMainWindow::on_pushButton_3_clicked() &{ &mplayerProcess-write(&volume-1/n&); &} &voidMainWindow::on_pushButton_5_clicked() &{ &this-setWindowFlags(Qt::Window); &w-setWindowFlags(Qt::FramelessWindowHint); &this-showFullScreen(); &shapesDockWidget1-hide(); &shapesDockWidget2-hide(); &ui-label_4-setText(QString::fromLocal8Bit(&全屏&)); &} &voidMainWindow::on_pushButton_6_clicked() &{ &this-setWindowFlags(Qt::Window); &this-resize(800,600); &//w-setWindowFlags(Qt::FramelessWindowHint); &this-showNormal(); &shapesDockWidget1-show(); &shapesDockWidget2-show(); &intx=(QApplication::desktop()-width()-this-width())/2; &inty=(QApplication::desktop()-height()-this-height())/2; &this-move(x,y); &ui-label_4-setText(QString::fromLocal8Bit(&不是全屏&)); &} &voidMainWindow::on_pushButton_9_clicked() &{ &QS &str=QString::number(ui-spinBox-value()); &mplayerProcess-write(&seek+&+str.toAscii()+&/n&); &qDebug()&()&seek+&+str.toAscii()+&/n&; &} &voidMainWindow::on_pushButton_10_clicked() &{ &QS &str=QString::number(ui-spinBox-value()); &mplayerProcess-write(&seek-&+str.toAscii()+&/n&); &} &voidMainWindow::on_spinBox_valueChanged(int) &{ &w-setFocus(); &} &voidMainWindow::on_spinBox_editingFinished() &{ &w-setFocus(); &} &voidMainWindow::closeEvent(QCloseEvent*ex) &{ &//inta=QMessageBox::information(NULL,QString::fromLocal8Bit(&对话框&),QString::fromLocal8Bit(&是否需要退出&),QString::fromLocal8Bit(&确定&),QString::fromLocal8Bit(&取消&),NULL,0,-1); &//if(a==0) &//{ &writeSettings(); &//ex-accept(); &//} &//elseif(a==1) &//{ &//ex-ignore(); &//} &} &voidMainWindow::writeSettings() &{ &QSettingssettings(&Software&,&IconEditor&); &settings.beginGroup(&mainWindow&); &settings.setValue(&size&,size()); &settings.setValue(&state&,saveState()); &settings.endGroup(); &} &voidMainWindow::readSettings() &{ &QSettingssettings(&Software&,&IconEditor&); &settings.beginGroup(&mainWindow&); &resize(settings.value(&size&).toSize()); &restoreState(settings.value(&state&).toByteArray()); &settings.endGroup(); &} &voidMainWindow::contextMenuEvent(QContextMenuEvent*event) &{ &shapesDockWidget1-show(); &shapesDockWidget2-show(); &//QCursorcur=this-cursor(); &menu=newQMenu(this); &menu-addAction(at5); &menu-addAction(at2); &menu-addAction(at3); &menu-addAction(at4); &//menu-exec(cur.pos()); &menu-exec(event-globalPos());// &//this-setContextMenuPolicy(Qt::ActionsContextMenu); &} &voidMainWindow::mouseMoveEvent(QMouseEvent*event) &{ &//if(ui-label_4-text()==QString::fromLocal8Bit(&不是全屏&)) &//{ &//if(event-buttons()&Qt::LeftButton){ &//move(event-globalPos()-m_dragPosition); &////move(event-globalPos()-m_dragPosition); &//event-accept(); &//} &//} &} &voidMainWindow::mousePressEvent(QMouseEvent*event) &{ &//if(ui-label_4-text()==QString::fromLocal8Bit(&不是全屏&)) &//{ &//if(event-button()==Qt::LeftButton){ &//m_dragPosition=event-globalPos()-frameGeometry().topLeft(); &//ui-widget-move(m_dragPosition); &//event-accept(); &//} &//} &} &boolMainWindow::eventFilter(QObject*obj,QEvent*event) &{ &if(obj==w){ &if(event-type()==QEvent::MouseButtonDblClick){ &QMouseEvent*ev=static_cast(event); &if(ev-buttons()&Qt::LeftButton) &{ &if(ui-label_4-text()==QString::fromLocal8Bit(&不是全屏&)) &{ &this-setWindowFlags(Qt::Window); &w-setWindowFlags(Qt::FramelessWindowHint); &this-showFullScreen(); &shapesDockWidget1-hide(); &shapesDockWidget2-hide(); &ui-label_4-setText(QString::fromLocal8Bit(&全屏&)); &} &elseif(ui-label_4-text()==QString::fromLocal8Bit(&全屏&)) &{ &this-setWindowFlags(Qt::Window); &this-resize(800,600); &//w-setWindowFlags(Qt::FramelessWindowHint); &this-showNormal(); &shapesDockWidget1-show(); &shapesDockWidget2-show(); &intx=(QApplication::desktop()-width()-this-width())/2; &inty=(QApplication::desktop()-height()-this-height())/2; &this-move(x,y); &ui-label_4-setText(QString::fromLocal8Bit(&不是全屏&)); &} &//m_dragPosition=ev-globalPos()-frameGeometry().topLeft(); &//ev-accept(); &} & &} &elseif(event-type()==QEvent::MouseButtonPress){ &QMouseEvent*ev=static_cast(event); &if(ev-buttons()&Qt::LeftButton) &{ &if(ui-label_4-text()==QString::fromLocal8Bit(&全屏&)) &{ &shapesDockWidget1-hide(); &shapesDockWidget2-hide(); &} &elseif(ui-label_4-text()==QString::fromLocal8Bit(&不是全屏&)) &{ &m_dragPosition=ev-globalPos()-frameGeometry().topLeft(); &ev-accept(); &w-setFocus(); &} &//m_dragPosition=ev-globalPos()-frameGeometry().topLeft(); &//ev-accept(); &} & &}elseif(event-type()==QEvent::MouseMove){ &QMouseEvent*ev=static_cast(event); &if(ev-buttons()&Qt::LeftButton){ &if(ui-label_4-text()==QString::fromLocal8Bit(&不是全屏&)) &{ &//move(event-globalPos()-m_dragPosition); &move(ev-globalPos()-m_dragPosition); &ev-accept(); &w-setFocus(); &} &} &} &else{ & &} &} &else{ &&//passtheeventontotheparentclass &returnQMainWindow::eventFilter(obj,event); &} & &} &voidMainWindow::on_textEdit_3_textChanged() &{ &w-setFocus(); &} &&************************************************** &main.cpp &#include &#include&mainwindow.h& &intmain(intargc,char*argv[]) &{ &QApplicationa(argc,argv); &MainW &w.show(); &returna.exec(); &}&小结：详解QT基于Mplayer媒体播放器应用教程的内容介绍完了，希望通过学习QT播放器的案例的实现，能对你有所帮助。更多关于QT的相关内容，请单击QT开发频道。--博才网
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