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QT Multimedia players for multiple video files

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multimediavideosgraphics viewc++mediaplayer
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  • K Offline
    K Offline
    Kinesis
    wrote on last edited by
    #5

    Yes I use qmediaplayer . But not like that . Here is my mainwindow.cpp.But it is for only 1 video with 1 player . I want multiple media players for multiple videos.

    //mainwindow.cpp
    MainWindow::MainWindow(QWidget parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
    {
    ui->setupUi(this);
    QString directory = QFileDialog::getOpenFileName(this,tr("Open File"),"All files(
    .*)");
    m_mediaPlayer = new QMediaPlayer(this, QMediaPlayer::VideoSurface);
    const QRect screenGeometry = QApplication::desktop()->screenGeometry(this);
    m_videoItem = new QGraphicsVideoItem;
    m_mediaPlayer->setMedia(QUrl::fromLocalFile(directory));
    m_videoItem->setSize(QSizeF(screenGeometry.width() / 3.2, screenGeometry.height() / 2.4));
    QGraphicsScene *scene = new QGraphicsScene(this);
    ui->graphicsView->setScene(scene);
    scene->addItem(m_videoItem);

    ui->pushButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
    connect(ui->pushButton, &QAbstractButton::clicked, this, &MainWindow::play);

    m_mediaPlayer->setVideoOutput(m_videoItem);
    connect(m_mediaPlayer, &QMediaPlayer::stateChanged,
    this, &MainWindow::mediaStateChanged);
    connect(m_mediaPlayer, &QMediaPlayer::positionChanged, this, &MainWindow::positionChanged);
    connect(m_mediaPlayer, &QMediaPlayer::durationChanged, this, &MainWindow::durationChanged);

    ui->horizontalSlider->setRange(0, 0);
    connect(ui->horizontalSlider, &QAbstractSlider::sliderMoved,
    this, &MainWindow::setPosition);
    MainWindow::~MainWindow()
    {
    delete ui;
    }

    QSize MainWindow::sizeHint() const
    {
    return (m_videoItem->size() * qreal(3) / qreal(2)).toSize();
    }

    bool MainWindow::isPlayerAvailable() const
    {
    return m_mediaPlayer->isAvailable();
    }

    void MainWindow::play()
    {
    switch (m_mediaPlayer->state()) {
    case QMediaPlayer::PlayingState:
    m_mediaPlayer->pause();
    break;
    default:
    m_mediaPlayer->play();
    break;
    }
    }

    void MainWindow::mediaStateChanged(QMediaPlayer::State state)
    {
    switch(state) {
    case QMediaPlayer::PlayingState:
    ui->pushButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));
    break;
    default:
    ui->pushButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
    break;
    }
    }

    void MainWindow::positionChanged(qint64 position)
    {
    ui->horizontalSlider->setValue(position);
    }

    void MainWindow::durationChanged(qint64 duration)
    {
    ui->horizontalSlider->setRange(0, duration);
    }

    void MainWindow::setPosition(int position)
    {
    m_mediaPlayer->setPosition(position);
    }

    jsulmJ 1 Reply Last reply
    0
    • K Kinesis

      Yes I use qmediaplayer . But not like that . Here is my mainwindow.cpp.But it is for only 1 video with 1 player . I want multiple media players for multiple videos.

      //mainwindow.cpp
      MainWindow::MainWindow(QWidget parent) :
      QMainWindow(parent),
      ui(new Ui::MainWindow)
      {
      ui->setupUi(this);
      QString directory = QFileDialog::getOpenFileName(this,tr("Open File"),"All files(
      .*)");
      m_mediaPlayer = new QMediaPlayer(this, QMediaPlayer::VideoSurface);
      const QRect screenGeometry = QApplication::desktop()->screenGeometry(this);
      m_videoItem = new QGraphicsVideoItem;
      m_mediaPlayer->setMedia(QUrl::fromLocalFile(directory));
      m_videoItem->setSize(QSizeF(screenGeometry.width() / 3.2, screenGeometry.height() / 2.4));
      QGraphicsScene *scene = new QGraphicsScene(this);
      ui->graphicsView->setScene(scene);
      scene->addItem(m_videoItem);

      ui->pushButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
      connect(ui->pushButton, &QAbstractButton::clicked, this, &MainWindow::play);

      m_mediaPlayer->setVideoOutput(m_videoItem);
      connect(m_mediaPlayer, &QMediaPlayer::stateChanged,
      this, &MainWindow::mediaStateChanged);
      connect(m_mediaPlayer, &QMediaPlayer::positionChanged, this, &MainWindow::positionChanged);
      connect(m_mediaPlayer, &QMediaPlayer::durationChanged, this, &MainWindow::durationChanged);

      ui->horizontalSlider->setRange(0, 0);
      connect(ui->horizontalSlider, &QAbstractSlider::sliderMoved,
      this, &MainWindow::setPosition);
      MainWindow::~MainWindow()
      {
      delete ui;
      }

      QSize MainWindow::sizeHint() const
      {
      return (m_videoItem->size() * qreal(3) / qreal(2)).toSize();
      }

      bool MainWindow::isPlayerAvailable() const
      {
      return m_mediaPlayer->isAvailable();
      }

      void MainWindow::play()
      {
      switch (m_mediaPlayer->state()) {
      case QMediaPlayer::PlayingState:
      m_mediaPlayer->pause();
      break;
      default:
      m_mediaPlayer->play();
      break;
      }
      }

      void MainWindow::mediaStateChanged(QMediaPlayer::State state)
      {
      switch(state) {
      case QMediaPlayer::PlayingState:
      ui->pushButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));
      break;
      default:
      ui->pushButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
      break;
      }
      }

      void MainWindow::positionChanged(qint64 position)
      {
      ui->horizontalSlider->setValue(position);
      }

      void MainWindow::durationChanged(qint64 duration)
      {
      ui->horizontalSlider->setRange(0, duration);
      }

      void MainWindow::setPosition(int position)
      {
      m_mediaPlayer->setPosition(position);
      }

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #6

      @Kinesis As @SGaist said you can create as many of them as you need.
      What is the problem?
      If you can create one you can create many in the same way...

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      1
      • K Offline
        K Offline
        Kinesis
        wrote on last edited by
        #7

        @jsulm
        The Problem is I don't know how to create multiple media players for multiple videos which are filtered from directory with looping or some QClasses .

        jsulmJ 1 Reply Last reply
        0
        • K Kinesis

          @jsulm
          The Problem is I don't know how to create multiple media players for multiple videos which are filtered from directory with looping or some QClasses .

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #8

          @Kinesis Please specify what exactly the problem is.
          Is it: how to filter files in a directory?

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
          0
          • K Offline
            K Offline
            Kinesis
            wrote on last edited by Kinesis
            #9

            @jsulm
            Filtering the video file is not the problem.
            The problem is I don't know how to show the filtered videos with media players.
            It means that 1 video per 1 player , 5 videos per 5 players.

            jsulmJ 1 Reply Last reply
            0
            • K Kinesis

              @jsulm
              Filtering the video file is not the problem.
              The problem is I don't know how to show the filtered videos with media players.
              It means that 1 video per 1 player , 5 videos per 5 players.

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #10

              @Kinesis You iterate over all the video files and create a player for each (like you already did above for one).

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
              2
              • K Offline
                K Offline
                Kinesis
                wrote on last edited by Kinesis
                #11

                @jsulm
                I know the logic but when it comes to coding I am really weak . please show me how to do it(just 1 example) . please :(

                jsulmJ 1 Reply Last reply
                0
                • K Kinesis

                  @jsulm
                  I know the logic but when it comes to coding I am really weak . please show me how to do it(just 1 example) . please :(

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #12

                  @Kinesis Sorry, I will not write the code for you.
                  I really don't understand what the problem is as you already managed to create one player for one file...

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  2
                  • K Offline
                    K Offline
                    Kinesis
                    wrote on last edited by
                    #13

                    @jsulm
                    Thanks for your help.I really appreciate that.

                    mrjjM 1 Reply Last reply
                    0
                    • K Kinesis

                      @jsulm
                      Thanks for your help.I really appreciate that.

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #14

                      @Kinesis
                      Hi
                      It is easier to help if you break down task in steps and ask pr step what we
                      would suggest.
                      Like getting all files in a folder you could do

                      #include <QDir>
                      //assume the directory exists and contains some files 
                      QDir directory("c:/xx/yyy"); // point to real folder
                      // ask for mp4 and avi. adjust to your needs
                      QStringList vids= directory.entryList(QStringList() << "*.mp4" << "*.avi",QDir::Files);
                      foreach(const QString &filename, vids) {
                      // new a player 
                      // insert to form or show as window
                      // give it file
                      // tell it to play
                      }
                      
                      K 1 Reply Last reply
                      2
                      • mrjjM mrjj

                        @Kinesis
                        Hi
                        It is easier to help if you break down task in steps and ask pr step what we
                        would suggest.
                        Like getting all files in a folder you could do

                        #include <QDir>
                        //assume the directory exists and contains some files 
                        QDir directory("c:/xx/yyy"); // point to real folder
                        // ask for mp4 and avi. adjust to your needs
                        QStringList vids= directory.entryList(QStringList() << "*.mp4" << "*.avi",QDir::Files);
                        foreach(const QString &filename, vids) {
                        // new a player 
                        // insert to form or show as window
                        // give it file
                        // tell it to play
                        }
                        
                        K Offline
                        K Offline
                        Kinesis
                        wrote on last edited by
                        #15

                        @mrjj
                        Thanks alot.

                        1 Reply Last reply
                        0
                        • K Offline
                          K Offline
                          Kinesis
                          wrote on last edited by
                          #16

                          I got the answer . MainWindow.cpp is like that

                           ui->listWidget->setFlow(QListView::LeftToRight);
                              ui->listWidget->setMinimumSize(1050,800);
                              ui->listWidget->setGridSize(QSize(340, 320));
                              ui->listWidget->setResizeMode(QListView::Adjust);
                              ui->listWidget->setViewMode(QListView::ListMode);
                              ui->listWidget->setWrapping(true);
                          
                              QDir directory = QFileDialog::getExistingDirectory(this, tr("Open Directory"),"/home",
                          
                                                                                 QFileDialog::ShowDirsOnly| QFileDialog::DontResolveSymlinks);
                          
                              directory.setNameFilters({"*.mp4" , "*.avi" , "*.flv" , "*.mwv"});
                          
                              for(const QFileInfo & finfo: directory.entryInfoList()){
                                  QMediaPlayer *mediaPlayer = new QMediaPlayer();
                                  mediaPlayer->setMedia(QUrl::fromLocalFile(finfo.absoluteFilePath()));
                                  videoItem = new QGraphicsVideoItem;
                                  videoItem->setSize(QSize(300,240));
                                  QGraphicsScene *scene = new QGraphicsScene(this);
                                  QGraphicsView *graphicsView = new QGraphicsView(scene);
                                  mediaPlayer->setVideoOutput(videoItem);
                          
                                  QPushButton *m_playButton = new QPushButton();
                                  m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
                          
                                  connect(m_playButton, &QAbstractButton::clicked, [mediaPlayer]() {
                                      switch (mediaPlayer->state()) {
                                      case QMediaPlayer::PlayingState:
                                          mediaPlayer->pause();
                                          break;
                                      default:
                                          mediaPlayer->play();
                                          break;
                                      }
                                  });
                          
                          
                                  connect(mediaPlayer, &QMediaPlayer::stateChanged, [m_playButton, this](QMediaPlayer::State state) {
                                      switch(state) {
                                      case QMediaPlayer::PlayingState:
                                          m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));
                                          break;
                                      default:
                                          m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
                                          break;
                                      }
                                  });
                          
                          
                          
                                  QSlider *m_positionSlider = new QSlider(Qt::Horizontal,this);
                                  m_positionSlider->setRange(0,mediaPlayer->duration() / 1000);
                          
                          
                                  connect(mediaPlayer, &QMediaPlayer::positionChanged ,[m_positionSlider, this](qint64 position){
                          
                                      m_positionSlider->setValue(position);
                                  });
                          
                                  connect(mediaPlayer, &QMediaPlayer::durationChanged ,[m_positionSlider, this](qint64 duration){
                          
                                      m_positionSlider->setRange(0,duration);
                                  });
                          
                          
                                  connect(m_positionSlider ,&QAbstractSlider::sliderMoved, [mediaPlayer ,this] (int position){
                          
                                      mediaPlayer->setPosition(position);
                                  });
                          
                          
                          
                          
                                  auto    item = new QListWidgetItem("", ui->listWidget);
                                  auto    widget = new QWidget;
                                  auto    label = new QLabel(finfo.fileName());
                                  auto    vb = new QVBoxLayout;
                          
                                  QBoxLayout *controlLayout = new QHBoxLayout;
                                  controlLayout->setMargin(0);
                                  controlLayout->addWidget(m_playButton);
                                  controlLayout->addWidget(m_positionSlider);
                          
                                  vb->addWidget(label);
                                  vb->addWidget(graphicsView);
                                  vb->addLayout(controlLayout);
                                  widget->setLayout(vb);
                                  widget->setMinimumSize(320, 320);
                                  ui->listWidget->setItemWidget(item,widget);
                                  player.append(mediaPlayer);
                                  scene->addItem(videoItem);
                          
                          
                          
                              }
                          
                          1 Reply Last reply
                          1

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