QMediaPlayer视频播放器

#include <QMediaPlayer>
#include <QVideoWidget>

    QWidget *widget = new QWidget;
    widget->resize(400, 300);   //

    QVBoxLayout *layout = new QVBoxLayout;
    QMediaPlayer* player = new QMediaPlayer;
    QVideoWidget* vw = new QVideoWidget;

    layout->addWidget(vw);
    widget->setLayout(layout);
    player->setVideoOutput(vw);

//    QFile file("D://1.mp4");
//    if(!file.open(QIODevice::ReadOnly))
//        qDebug() << "Could not open file";

    player->setMedia(QUrl::fromLocalFile("D://1.mp4"));
    player->play();
    widget->show();