Java：在 JMF Lightweight_Rendered 播放器上绘制线条

发布于 2024-08-20 16:20:16 字数 1730 浏览 14 评论 0原文

我遇到了一个问题：我的应用程序中有一个 JMF-Videoplayer，我想在它上绘图（当视频继续播放时）。我遇到的问题是我使用 JLayeredPane，在 Layer.Content_Layer(index 0) 上添加 VideoPlayer-Control，在 Layer.Modal_Layer(index 300) 上添加 JPanel (setOpaque(false))。

发生的情况是，当我添加 JPanel 时，它不是不透明的，但我看到了绘制的线条，但看不到视频。如果我之前添加 JPanel（没有更改图层的索引），我添加视频控件，然后我会看到视频，但看不到绘制的线条。

有人知道为什么这不起作用以及我如何让它起作用吗？

我考虑过向视频控制组件添加一个 ActionListener，每当图像发生变化时，我都会将此图像绘制为 JPanel 上的背景，但我担心这会花费我宝贵的时间。

我的代码如下所示：

        Manager.setHint( Manager.LIGHTWEIGHT_RENDERER, true );
        mediaPlayer = Manager.createRealizedPlayer(url);

        this.videoPane = new JLayeredPane();
        this.videoPane.setLayout(new BorderLayout());            

        // get the components for the video and the playback controls
        this.video = mediaPlayer.getVisualComponent();
        this.controls = mediaPlayer.getControlPanelComponent();

        this.drawPanel = new JLabel();
        this.drawPanel.setSize(video.getWidth(), video.getHeight());
        this.drawPanel.setOpaque(false);

        if ( video != null )
           this.videoPane.add(video, BorderLayout.CENTER, JLayeredPane.FRAME_CONTENT_LAYER);

        if ( controls != null )
           this.videoPlayerPanel.add( controls, BorderLayout.SOUTH);

        this.videoPane.add(drawPanel, BorderLayout.CENTER, JLayeredPane.MODAL_LAYER);
        this.videoPlayerPanel.add(videoPane, BorderLayout.CENTER);

videoPlayerPanel 也是一个包含 JLayeredPane 的 JPanel...如您所见。

编辑：好吧，我进行了一些研究，发现它

mediaPlayer.getVisualComponent();

返回一个 java.awt.Component 并且此类组件不支持不透明度 - 也许这就是我看不到或只能看到 drawPanel 的原因。

因此，目前我正在尝试通过将视频组件添加到自定义面板来直接绘制到视频组件上，在该面板中我重写绘制方法来绘制所有线条。还有其他想法吗？

原文

I've got a problem: I have a JMF-Videoplayer in my application and I want to draw on it (while the video continues). The Problem I've got is that I use a JLayeredPane where I add the VideoPlayer-Control on Layer.Content_Layer(index 0) and a JPanel (setOpaque(false)) on Layer.Modal_Layer(index 300).

What happens is, when I add the JPanel it is not opaque but I see the drawn lines but not the video. If I add the JPanel before (didn't changed the index of the layer) I add the video-control then I see the video but not the drawn lines.

Has someone an idea why this doesn't work and how I could make it work?

I thought about adding an ActionListener to the video-control-component and evertime the image changes, I take this image and paint it as background on the JPanel but I'm affraid that this will cost me precious time.

My code looks like this:

        Manager.setHint( Manager.LIGHTWEIGHT_RENDERER, true );
        mediaPlayer = Manager.createRealizedPlayer(url);

        this.videoPane = new JLayeredPane();
        this.videoPane.setLayout(new BorderLayout());            

        // get the components for the video and the playback controls
        this.video = mediaPlayer.getVisualComponent();
        this.controls = mediaPlayer.getControlPanelComponent();

        this.drawPanel = new JLabel();
        this.drawPanel.setSize(video.getWidth(), video.getHeight());
        this.drawPanel.setOpaque(false);

        if ( video != null )
           this.videoPane.add(video, BorderLayout.CENTER, JLayeredPane.FRAME_CONTENT_LAYER);

        if ( controls != null )
           this.videoPlayerPanel.add( controls, BorderLayout.SOUTH);

        this.videoPane.add(drawPanel, BorderLayout.CENTER, JLayeredPane.MODAL_LAYER);
        this.videoPlayerPanel.add(videoPane, BorderLayout.CENTER);

The videoPlayerPanel is also a JPanel that contains the JLayeredPane... as you can see.

Edit:
Okay I put some research into it and found out that

mediaPlayer.getVisualComponent();

returns a java.awt.Component and such components do not support opacity - maybe that's the reason why I cannot see or only see the drawPanel.

So currently I'm trying to draw directly onto the video-Component by adding it to a customized Panel where i override the paint-method to draw all the lines.
Any other ideas?

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