我正在尝试使用 JMF 在我的 java 应用程序中播放视频。视频播放良好,但我试图让视频更大。下面的代码被放置在另一个具有 gridbag 布局的 jpanel 中。
我目前在添加它时没有 FILL 约束,因此它应该以正常大小显示。
当我添加填充约束时,它会拉伸视频,使纵横比倾斜。
我想我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();
}
}