QT音视频播放-简易播放器

#include "mainwindow.h" #include "ui_mainwindow.h" #include<QVideoWidget> #include<QMediaPlaylist> #include<QMessageBox> #include<QMediaPlaylist> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); player=new QMediaPlayer(this);//可以多次调用 //用 player指针变量保存对话框的指针，便于之后使用 QVideoWidget *video=new QVideoWidget(this); ui->verticalLayout->addWidget(video); player->setVideoOutput(video); // 创建播放列表 playlist=new QMediaPlaylist(this); player->setPlaylist(playlist); // //关联进度条 // connect(player,&QMediaPlayer::positionChanged,this,&MainWindow::updateProgress); // connect(ui->horizontalSlider,&QSlider::valueChanged,player,&QMediaPlayer::setPosition); connect(player,&QMediaPlayer::positionChanged,this,&MainWindow::positionupdate); //播放进度 connect(ui->horizontalSlider,&QSlider::sliderMoved,this,&MainWindow::updatePlayPosition); //媒体信息的关联 connect(player,&QMediaPlayer::metaDataAvailableChanged,this,&MainWindow::updateMediaInfo); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_horizontalSlider_2_valueChanged(int value) { QApplication::beep();//声音 } #include<QFileDialog> #include<QMediaPlaylist> //打开媒体文件 void MainWindow::on_actiondaikaiwenjian_triggered() { QStringList slit=QFileDialog::getOpenFileNames(this,"选择媒体文件","c:/","媒体文件(*.mp3 *.mp4 *.mv);;所以文件（*）"); //如果文件路径不为空，设置播放器的媒体 int index=playlist->mediaCount(); foreach(QString s,slit){ playlist->addMedia(QUrl::fromLocalFile(s)); qDebug() << s; qDebug() << slit; //添加媒体到tablewidget QTableWidgetItem *item0=new QTableWidgetItem(QFileInfo(s).fileName()); QTableWidgetItem *item1=new QTableWidgetItem("--:--"); int newRow=ui->tableWidget->rowCount(); ui->tableWidget->insertRow(newRow); ui->tableWidget->setItem(newRow,0,item0); ui->tableWidget->setItem(newRow,1,item1); } if(slit.size()>0){ playlist->setCurrentIndex(index); ui->tableWidget->selectColumn(index); } } void MainWindow::playerStart() { if(playlist->mediaCount()==0)return; ui->pushButton->setText("暂停"); if(playlist->currentIndex()!=ui->tableWidget->currentRow()){ playlist->setCurrentIndex(ui->tableWidget->currentRow()); } player->play();//开始播放 } //双击播放 void MainWindow::on_tableWidget_doubleClicked(const QModelIndex &index) { playerStart(); } //播放 按钮 void MainWindow::on_pushButton_clicked() { if(ui->pushButton->text()=="播放"){ playerStart(); }else if(ui->pushButton->text()=="暂停"){ ui->pushButton->setText("播放"); player->pause();//暂停 } } void MainWindow::on_verticalSlider_actionTriggered(int action) { connect(ui->verticalSlider,&QSlider::sliderMoved,player,&QMediaPlayer::setVolume); ui->verticalSlider->setValue(player->volume()); } void MainWindow::positionupdate(qint64 p) { ui->horizontalSlider->setMaximum(player->duration()/1000); ui->horizontalSlider->setValue(p/1000); ui->label_2->setText(QString("%1:%2").arg(player->position()/1000/60) .arg(player->position()/1000%60)); } //进度条 void MainWindow::updateProgress(int p) { ui->horizontalSlider->setMaximum(player->duration()); ui->horizontalSlider->setValue(p); } //播放进度调整 void MainWindow::updatePlayPosition(int p) { player->setPosition(p*1000); } //播放模式 void MainWindow::on_pushButton_2_clicked() { if(ui->pushButton_2->text() == "单曲1次") { ui->pushButton_2->setText("单曲循环"); playlist->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop); } else if (ui->pushButton_2->text() == "单曲循环") { ui->pushButton_2->setText("顺序一次"); playlist->setPlaybackMode(QMediaPlaylist::Sequential); } else if (ui->pushButton_2->text() == "顺序一次") { ui->pushButton_2->setText("顺序循环"); playlist->setPlaybackMode(QMediaPlaylist::Loop); } else if (ui->pushButton_2->text() == "顺序循环") { ui->pushButton_2->setText("随机"); playlist->setPlaybackMode(QMediaPlaylist::Random); } else if (ui->pushButton_2->text() == "随机") { ui->pushButton_2->setText("单曲一次"); playlist->setPlaybackMode(QMediaPlaylist::CurrentItemOnce); } else { ui->pushButton_2->setText("顺序一次"); playlist->setPlaybackMode(QMediaPlaylist::Sequential); } } //上一首 void MainWindow::on_pushButton_4_clicked() { if(playlist->currentIndex()>0) playlist->previous(); // fname=QFileDialog::getOpenFileName(this,"选择音乐文件"); } //下一首 void MainWindow::on_pushButton_3_clicked() { if(playlist->currentIndex()< playlist->mediaCount()-1); playlist->next(); } //媒体信息更新 void MainWindow::updateMediaInfo(bool available) { if(available){ QString title=player->metaData("Title").toString(); QString author=player->metaData("Author").toString(); if(!title.isEmpty()) setWhatsThis(title+" - "+author); else setWindowTitle(ui->tableWidget->item(playlist->currentIndex(),0)->text()); ui->tableWidget->item(playlist->currentIndex(),1)->setText(QString("%1:%2"). arg(player->duration()/1000/60).arg(player->duration()/1000%60)); } } bool MainWindow::eventFilter(QObject *watched, QEvent *event) { // if(event->type() == QEvent::MouseButtonDblClick){ // QMouseEvent *e = (QMouseEvent*) event ; // if(e->button() == Qt::LeftButton) { //} // if(event->type() == QEvent::MouseButtonDblClick) // { // QMouseEvent *e = (QMouseEvent*)event; // if(e->button()==Qt::LeftButton); // { // if(videoWidget->isFullScreen()) // { // videoWidget->setWindowFlags(Qt::SubWindow); // videoWidget->showNormal(); // } // else // { // videoWidget->setWindowFlags(Qt::Window); // videoWidget->showFullScreen(); // } // return true; // } // } // return false; } void MainWindow::on_horizontalSlider_actionTriggered(int action) { }