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Change Resolution Sample Program <-- this automatically adds a header showing the name of this page -->
@author captfoss
The following JMF utility program from the JMF Quickstart Guide will allow you to change the resolution of your web cam capture via a combo box to any format supported by your web cam.
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import javax.media.*;
import javax.media.control.FormatControl;
import javax.media.protocol.*;
import javax.swing.*;
/**
*
* @author captfoss & TBM
*/
public class ChangeResolution extends JFrame implements ControllerListener {
Player p;
DataSource ds;
JComboBox combo;
JPanel vidPanel;
public ChangeResolution() {
super("Resolution Change, by captfoss and TBM");
Manager.setHint(Manager.LIGHTWEIGHT_RENDERER, true);
try {
ds = Manager.createDataSource(new MediaLocator("vfw://0"));
p = Manager.createPlayer(ds);
} catch (Exception ex) {
ex.printStackTrace();
}
p.addControllerListener(this);
p.realize();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
vidPanel = new JPanel(new BorderLayout());
vidPanel.setBackground(new Color(250,230,250));
}
private void populateCombo() {
Vector<Format> allFormats = new Vector<Format>();
if (ds instanceof CaptureDevice) {
FormatControl[] fcs = ((CaptureDevice) ds).getFormatControls();
for (FormatControl fc : fcs) {
Format[] formats = ((FormatControl) fc).getSupportedFormats();
for (Format format : formats) {
allFormats.add(format);
}
}
}
combo = new JComboBox(allFormats);
combo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
new Thread(new Runnable() {
public void run() {
vidPanel.removeAll();
vidPanel.revalidate();
JLabel lab=new JLabel("<html><center><font color=\"red\">Wait for a while...</font><br/>" +
"<b><font color=\"green\">Format Changing...</font></b><br/>" +
"<i>You are using a free open source 'Webcam Resolution Change utility', <u>meant for " +
"demonstration only</u>, by:</br>" +
"<font color=\"blue\"> captfoss and T.B.M</i></font><br/>" +
"<font size=+1 color=\"green\"><b>ENJOY!!</b></font></center></html>");
lab.setHorizontalAlignment(JLabel.CENTER);
vidPanel.add(lab,BorderLayout.CENTER);
vidPanel.validate();
p.stop();
p.close();
try {
ds = Manager.createDataSource(new MediaLocator("vfw://0"));
} catch (Exception ex) {
ex.printStackTrace();
}
requestCaptureFormat((Format) combo.getSelectedItem(), ds);
p = null;
try {
p = Manager.createPlayer(ds);
} catch (Exception ex) {
ex.printStackTrace();
}
p.addControllerListener(ChangeResolution.this);
p.realize();
}
}).start();
}
});
}
// the method which actually changes the format.
public boolean requestCaptureFormat(Format requested_format, DataSource ds) {
if (ds instanceof CaptureDevice) {
FormatControl[] fcs = ((CaptureDevice) ds).getFormatControls();
for (FormatControl fc : fcs) {
Format[] formats = ((FormatControl) fc).getSupportedFormats();
for (Format format : formats) {
if (requested_format.matches(format)) {
((FormatControl) fc).setFormat(format);
return true;
}
}
}
}
return false;
}
public static void main(String args[]) {
try {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new ChangeResolution();
}
});
} catch (Exception ex) {
ex.printStackTrace();
}
}
public void controllerUpdate(ControllerEvent e) {
if (e instanceof RealizeCompleteEvent) {
p.prefetch();
}
if(e instanceof PrefetchCompleteEvent){
vidPanel.removeAll();
if (p.getVisualComponent() != null) {
vidPanel.add(p.getVisualComponent(), BorderLayout.CENTER);
}
if (p.getControlPanelComponent() != null) {
vidPanel.add(p.getControlPanelComponent(), BorderLayout.SOUTH);
}
vidPanel.validate();
if (combo == null) {
populateCombo();
getContentPane().add(vidPanel, BorderLayout.CENTER);
getContentPane().add(combo, BorderLayout.SOUTH);
}
combo.setPreferredSize(new Dimension(p.getVisualComponent().getPreferredSize().width, combo.getPreferredSize().height));
pack();
setLocationRelativeTo(null);
setVisible(true);
p.start();
}
}
}
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