vlcj仅显示黑屏

Question

我解决了previous problem。之后，我编写了启动YouTube播放器的代码。但是，即使创建了窗口，也仅显示黑屏，并且没有声音。我使用Java 8 64位，vlcj-4.4.1，vlcj-natives-4.1.0，jna-5.2.0，jna-platform-5.2.0版本。另外，vlc安装在路径“ C：\ Program Files \ VideoLAN \ VLC”中。我该怎么解决？

public class Video {

    private static final int width = 880, height = 495; //frame.setBounds(0, 200, width, height + 37);
    private final JFrame frame;
    private final CallbackMediaPlayerComponent mediaPlayerComponent;

    public Video(String url) {
        frame = new JFrame("TEST");
        frame.setBounds(0, 200, width, height + 37);

        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                mediaPlayerComponent.release();
                System.exit(0);
            }
        });

        mediaPlayerComponent = new CallbackMediaPlayerComponent();
        frame.setContentPane(mediaPlayerComponent);

        frame.setVisible(true);
        mediaPlayerComponent.mediaPlayer().media().play(url);
    }
}