#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
 : QMainWindow(parent)
 , ui(new Ui::MainWindow)
{
 ui->setupUi(this);
videoWidget = new QVideoWidget(this);
 videoWidget->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
 videoWidget->setMinimumHeight(0);
// audioOutput = new QAudioOutput(this);
 mediaPlayer = new QMediaPlayer(this);
 mediaPlayer->setVideoOutput(videoWidget);
 mediaPlayer->setSource(QUrl::fromLocalFile("D:\\Videos\\Videos\\New\\Michael J - Bad.mp4"));
// mediaPlayer->setAudioOutput(audioOutput);
ui->stackedWidget->addWidget(videoWidget);
 ui->stackedWidget->setCurrentWidget(videoWidget);
}
MainWindow::~MainWindow()
{
 delete ui;
}
void MainWindow::on_pushButton_clicked()
{
 mediaPlayer->play();
}

audioOutput = new QAudioOutput(this);