Qt

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QVideoWidget *_vw = new QVideoWidget;
    QMediaPlayer *_player = new QMediaPlayer(ui->cameraWidget);
    ui->gridLayout_2->addWidget(_vw);
    _player->setVideoOutput(_vw);

    const QUrl url = QUrl("rtsp://192.168.200.102:5554/playlist.m3u");
    const QNetworkRequest requestRtsp(url);
    _player->setMedia(requestRtsp);
    _player->play();
}