我已经为 Xuggler 的 IMediaReader 编写了一个侦听器。它应该在 JPanel 中显示我可以添加到 JFrame 的视频。
我在主类中创建了这个 JFrame：
class Window extends JFrame {
static IMediaReader reader;
static Window main;
public static void main(String[] args) {
new Thread() {
public void run() {
reader = ToolFactory.makeReader("C:/Users/André/Desktop/Detail.wmv");
reader.addListener(new Player(IMediaViewer.Mode.AUDIO_VIDEO, main));
while (reader.readPacket() == null)
do {} while(false);
}
}.start();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
main = new Window();
}
});
}
private Window() {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
setVisible(true);
setSize(700, 700);
}
});
}
// invoked by Player with the video panel
public void add(final JPanel videoPanel) {
add(videoPanel, BorderLayout.CENTER);
}
}
它显示了视频，但仅在我手动调整窗口大小时才有效，这是我的问题。否则，它会显示一个黑色的小方块。
使用 pack() 而不是 setSize() 或调用 repaint 没有帮助。
类 Player 的代码不只是来自我。我刚刚改变了一些东西：
public class Player extends MediaListenerAdapter implements IMediaListener, IMediaViewer {
private static Main main;
Player(Mode mode, Main main) {
setMode(mode);
Player.main = main;
}
@Override
public void onAddStream(IAddStreamEvent event)
{
[...]
MediaFrame frame = new MediaFrame(stream, this, main);
[...]
}
@Override
public void onVideoPicture(IVideoPictureEvent event)
{
MediaFrame frame = mFrames.get(event.getStreamIndex());
frame.setVideoImage(event.getPicture(), event.getImage());
}
static class PositionFrame extends JPanel
{
public PositionFrame(Player viewer, Main main)
{
main.add(this);
mFrames.add(this);
}
protected void adjustSize()
{
invalidate();
}
}
private class MediaFrame extends PositionFrame
{
// the video image
private BufferedImage mImage;
// the video panel
private final JPanel mVideoPanel;
// the stream
private final IStream mStream;
// the index of the stream (incase it's closed)
private final int mStreamIndex;
/**
* Construct a media frame.
*
* @param defaultCloseOperation what should Swing do if the window
* is closed. See the {@link javax.swing.WindowConstants}
* documentation for valid values.
* @param stream the stream which will appear in this frame
* @param viewer containing media viewer
*/
public MediaFrame(IStream stream,
Player viewer, Main main)
{
super(viewer, main);
// get stream and set title based it, establish a copy of the
// stream since it lives in a separate thread
mStream = stream.copyReference();
mStreamIndex = mStream.getIndex();
// the panel which shows the video image
mVideoPanel = new JPanel()
{
public void paint(Graphics graphics)
{
paintPanel((Graphics2D) graphics);
}
};
// add the videoPanel
add(mVideoPanel);
// show the frame
setVisible(true);
}
// set the video image
protected void setVideoImage(IVideoPicture picture, BufferedImage image)
{
[...]
}
protected void paintPanel(Graphics2D graphics)
{
if (mImage != null)
graphics.drawImage(mImage, 0, 0, null);
}
}
}
它由 MediaViewer 类组成 http://code.google.com/p/xuggle/source/browse/trunk/java/xuggle-xuggler/src/com/xuggle/mediatool/MediaViewer.java?r=644
编辑：如果我这样做，如果不手动调整大小，它就无法工作。如果我对你的理解是正确的，我不确定。