使用 VLCJ 将视频播放器添加到 Java 中的 JPanel
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Adding a video player to a JPanel in java using VLCJ
提问by jazibobs
I am currently in the position of having 2 pieces of work I wish to combine. I have a simple media player running in a JFrame and a GUI I would like to add video playback to on a JPanel.
我目前有两件我希望合并的工作。我有一个在 JFrame 中运行的简单媒体播放器和一个 GUI，我想在 JPanel 上添加视频播放。
The code for the which creates video player window is as follows:
创建视频播放器窗口的代码如下：
private final JFrame vidFrame;
private final EmbeddedMediaPlayerComponent vidComp;
//Creates JPanel for video player
public Video() {
vidFrame = new JFrame("VLC video test");
vidFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
vidFrame.setLocation(100, 100);
vidFrame.setSize(800, 800);
vidComp = new EmbeddedMediaPlayerComponent();
//This is the point where I am trying to add the video player to the GUI
MainWindow.vidPanel.add(vidComp);
vidFrame.add(vidComp);
vidFrame.setVisible(true);
}
And this is the panel I'm trying to add the player to:
这是我尝试将播放器添加到的面板：
JPanel vidPanel = new JPanel();
vidPanel.setBorder(new BevelBorder(BevelBorder.LOWERED, null, null, null, null));
vidPanel.setBounds(10, 11, 532, 400);
contentPane.add(vidPanel);
I get the error message: "vidPanel cannot be resolved or is not a field"
我收到错误消息：“vidPanel 无法解析或不是字段”
Does anyone know how I can rectify this?
有谁知道我该如何解决这个问题？
回答by pelutxe
I've had the same problem and just solve it today. The problem is you're using a JPanel and you'll never be able to watch a video there, you should use a Canvas instead. This is what worked for me:
我遇到了同样的问题，今天才解决。问题是您使用的是 JPanel 并且您永远无法在那里观看视频，您应该改用 Canvas。这对我有用：
Canvas canvas = new Canvas();
MediaPlayerFactory mediaPlayerFactory = new MediaPlayerFactory();
CanvasVideoSurface videoSurface = mediaPlayerFactory.newVideoSurface(canvas);
EmbeddedMediaPlayer mediaPlayer = mediaPlayerFactory.newEmbeddedMediaPlayer();
mediaPlayer.setVideoSurface(videoSurface);
mediaPlayer.playMedia(String with the name of the file);
I'm using JDK 1.6 and VLCJ 2.1
我使用的是 JDK 1.6 和 VLCJ 2.1
If you're using an IDE just place a Canvas exactly as you placed the JPanel and delete the first line.
如果您使用的是 IDE，只需完全按照您放置 JPanel 的方式放置 Canvas 并删除第一行。
Good luck
祝你好运
回答by Michael Berry
Firstly, it looks like your vidPanelis a local variable and should be a field if you need to access it from other methods. This is a pretty basic piece of Java - any beginners tutorial should cover this. VLCJ isn't the simplest thing to use and you may come unstuck if you're not clear on the fundamentals.
首先，看起来你vidPanel是一个局部变量，如果你需要从其他方法访问它应该是一个字段。这是 Java 的一个非常基本的部分 - 任何初学者教程都应该涵盖这一点。VLCJ 不是最容易使用的东西，如果您不清楚基本原理，您可能会不知所措。
Secondly, before you head too far down that track, an embedded VLCJ player doesn't work with a JPanel, just a native AWT Canvas - so you'll need to use that instead.
其次，在您走得太远之前，嵌入式 VLCJ 播放器不能与 JPanel 一起使用，而只能与本机 AWT Canvas 一起使用——因此您需要改用它。
回答by Hakan Serce
First of all it seems to me that vidPanelis defined as a local variable, make it a member field by defining in the class scope (not in a method).
首先，在我看来，它vidPanel被定义为局部变量，通过在类范围内（而不是在方法中）定义来使其成为成员字段。
This is not how you do in a real maintainable code, but just to make a quick solution to your problem: Define a getVidPanel()function in MainWindow which returns vidPanel.
这不是您在真正可维护的代码中所做的，而只是为了快速解决您的问题：getVidPanel()在 MainWindow 中定义一个返回vidPanel.
Then instead of the erroneous line use the following:
然后，而不是错误的行使用以下内容：
MainWindow aMainWindowInstance = new MainWindow();
aMainWindowInstance.getVidPanel().add(vidComp);
