使用JMF调整视频大小

时间:2009-08-07 12:47:10

标签: java jmf

我正在尝试使用JMF在我的java应用程序中播放视频。视频播放正常,但我试图让视频更大。下面的代码被放置在另一个带有gridbag布局的jpanel中。

我目前正在添加没有FILL约束,所以它应该以正常大小显示。

当我添加填充约束时,它会拉伸偏移宽高比的视频。

我想即时通讯询问是否有人知道如何手动调整视频大小或如何锁定宽高比

public class VideoPanel extends JPanel{
private Player mediaPlayer;
private File file;

public VideoPanel(String videoFile, String path){
    setOpaque(false);
    file = new File(path+"/video/"+videoFile); 

    URL mediaURL = null;
    try {
        mediaURL = file.toURI().toURL();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
    setLayout( new BorderLayout() );      
    Manager.setHint( Manager.LIGHTWEIGHT_RENDERER, true );
    try{
        mediaPlayer = Manager.createRealizedPlayer( mediaURL );
        Component video = mediaPlayer.getVisualComponent();
        Component controls = mediaPlayer.getControlPanelComponent();

        double scale = getScale(this.getWidth(),this.getHeight(),video.getWidth(),video.getHeight());

        video.setPreferredSize(new Dimension((int)scale*video.getWidth(),(int)scale*video.getHeight()));



        if(video != null) 
            add(video,BorderLayout.CENTER );
        if(controls != null) 
            add(controls,BorderLayout.SOUTH );
    }
    catch ( NoPlayerException noPlayerException ){
        System.err.println( "No media player found" );
    }
    catch ( CannotRealizeException cannotRealizeException ){
        System.err.println( "Could not realize media player" );
    }
    catch ( IOException iOException ){
        System.err.println( "Error reading from the source" );
    }
}

private double getScale(int panelWidth, int panelHeight, int imageWidth, int imageHeight) {
    double scale = 1;
    double xScale;
    double yScale;

    xScale = (double) panelWidth / imageWidth;
    yScale = (double) panelHeight / imageHeight;
    scale = Math.min(xScale, yScale);
    return scale;
}

public void stopPlay(){     
    mediaPlayer.stop();
}

}

1 个答案:

答案 0 :(得分:2)

您可能只想将视频组件放在另一个容器面板中,并从容器中控制大小。在我的应用中,我将视频组件设置在JFrame中并调整视频大小,我只需调整容器大小。