videoplayer.cpp Example File

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 #include "videoplayer.h"

 #include "videowidget.h"

 #include <QtWidgets>
 #include <qvideosurfaceformat.h>

 VideoPlayer::VideoPlayer(QWidget *parent)
     : QWidget(parent)
     , mediaPlayer(0, QMediaPlayer::VideoSurface)
     , playButton(0)
     , positionSlider(0)
 {
     VideoWidget *videoWidget = new VideoWidget;

     QAbstractButton *openButton = new QPushButton(tr("Open..."));
     connect(openButton, SIGNAL(clicked()), this, SLOT(openFile()));

     playButton = new QPushButton;
     playButton->setEnabled(false);
     playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));

     connect(playButton, SIGNAL(clicked()),
             this, SLOT(play()));

     positionSlider = new QSlider(Qt::Horizontal);
     positionSlider->setRange(0, 0);

     connect(positionSlider, SIGNAL(sliderMoved(int)),
             this, SLOT(setPosition(int)));

     QBoxLayout *controlLayout = new QHBoxLayout;
     controlLayout->setMargin(0);
     controlLayout->addWidget(openButton);
     controlLayout->addWidget(playButton);
     controlLayout->addWidget(positionSlider);

     QBoxLayout *layout = new QVBoxLayout;
     layout->addWidget(videoWidget);
     layout->addLayout(controlLayout);

     setLayout(layout);

     mediaPlayer.setVideoOutput(videoWidget->videoSurface());
     connect(&mediaPlayer, SIGNAL(stateChanged(QMediaPlayer::State)),
             this, SLOT(mediaStateChanged(QMediaPlayer::State)));
     connect(&mediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(positionChanged(qint64)));
     connect(&mediaPlayer, SIGNAL(durationChanged(qint64)), this, SLOT(durationChanged(qint64)));
 }

 VideoPlayer::~VideoPlayer()
 {
 }

 void VideoPlayer::openFile()
 {
     QString fileName = QFileDialog::getOpenFileName(this, tr("Open Movie"),QDir::homePath());

     if (!fileName.isEmpty()) {
         mediaPlayer.setMedia(QUrl::fromLocalFile(fileName));

         playButton->setEnabled(true);
     }
 }

 void VideoPlayer::play()
 {
     switch(mediaPlayer.state()) {
     case QMediaPlayer::PlayingState:
         mediaPlayer.pause();
         break;
     default:
         mediaPlayer.play();
         break;
     }
 }

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

 void VideoPlayer::positionChanged(qint64 position)
 {
     positionSlider->setValue(position);
 }

 void VideoPlayer::durationChanged(qint64 duration)
 {
     positionSlider->setRange(0, duration);
 }

 void VideoPlayer::setPosition(int position)
 {
     mediaPlayer.setPosition(position);
 }