This program is based the conversion of multimedia contents.This program takes a MPEG file as input and translates into avi file. The encoding quality on the JPEG encoder is 0.5.Transcodibg is the process of converting a file from one format to another or from one quality to another quality. We'll loop through the tracks and try to find a track that can be converted to the given format. While transcoding a MPEG file into avi file, the encoding quality is set to the default value. After the conversion of tracks, Convert a file name to a content type. The extension is parsed to determine the content type.Methods used for the conversion are setTrackFormats (), setEachTrackFormat (), setJPEGQuality ().
Transcoding of MPEG files to avi Using Java :
/*
* NewJFrame1.java
*
* Created on March 23, 2009, 6:02 PM
*/
import javax.swing.*;
import java.io.*;
import javax.media.*;
import java.util.*;
/**
*
* @author Administrator
*/
public class NewJFrame1 extends javax.swing.JFrame {
/** Creates new form NewJFrame1 */
public NewJFrame1() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// //GEN-BEGIN:initComponents
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(100,120,75));
jLabel1.setText("TransCoding");
jButton1.setText("Input");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Output");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jButton3.setText("Transcode");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
//jTextField1.setBounds();
jLabel2.setText("Input File");
jLabel3.setText("Output File");
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1.setBackground(new java.awt.Color(0, 153, 153));
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 64, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(28, 28, 28)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup()
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(48, 48, 48)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGap(25, 25, 25)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(115, 115, 115)
.addComponent(jButton3)))
.addContainerGap(106, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(30, 30, 30)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 21, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 21, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jButton2))
.addGap(31, 31, 31)
.addComponent(jButton3)
.addContainerGap(123, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
getContentPane().setBackground(new java.awt.Color(0, 153, 153));
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}// //GEN-END:initComponents
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField1ActionPerformed
// TODO add your handling code here:
}//GEN-LAST:event_jTextField1ActionPerformed
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
JFileChooser chooser=new JFileChooser();
int returnVal = chooser.showOpenDialog(this);
if(returnVal == JFileChooser.APPROVE_OPTION) {
jTextField1.setText(chooser.getSelectedFile().getAbsolutePath());
}
}//GEN-LAST:event_jButton1ActionPerformed
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
JFileChooser chooser=new JFileChooser();
int returnVal = chooser.showOpenDialog(this);
if(returnVal == JFileChooser.APPROVE_OPTION) {
jTextField2.setText(chooser.getSelectedFile().getAbsolutePath());
}
}//GEN-LAST:event_jButton2ActionPerformed
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
String inputURL = null, outputURL = null;
int mediaStart = -1, mediaEnd = -1;
Vector audFmt = new Vector(), vidFmt = new Vector();
inputURL="file:\\"+jTextField1.getText();
outputURL="file:\\"+jTextField2.getText();
int j=0;
vidFmt.addElement("mjpg");
Format fmts[] = new Format[audFmt.size() + vidFmt.size()];
Format fmt;
Transcode transcode = new Transcode();
for (int i = 0; i < vidFmt.size(); i++) {
if ((fmt =transcode.parseVideoFormat((String)vidFmt.elementAt(i))) == null) {
}
fmts[j++] = fmt;
}
MediaLocator iml, oml;
if ((iml = createMediaLocator(inputURL)) == null) {
System.err.println("Cannot build media locator from: " + inputURL);
System.exit(0);
}
if ((oml = createMediaLocator(outputURL)) == null) {
System.err.println("Cannot build media locator from: " + outputURL);
System.exit(0);
}
if (!transcode.doIt(iml, oml, fmts, mediaStart, mediaEnd)) {
System.err.println("Transcoding failed");
}
}//GEN-LAST:event_jButton3ActionPerformed
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame1().setVisible(true);
}
});
}
static MediaLocator createMediaLocator(String url) {
MediaLocator ml;
if (url.indexOf(":") > 0 && (ml = new MediaLocator(url)) != null)
return ml;
if (url.startsWith(File.separator)) {
if ((ml = new MediaLocator("file:" + url)) != null)
return ml;
} else {
String file = "file:" + System.getProperty("user.dir") + File.separator + url;
if ((ml = new MediaLocator(file)) != null)
return ml;
}
return null;
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration//GEN-END:variables
}
/*Transcode*/
import java.awt.*;
import java.util.Vector;
import java.io.File;
import javax.media.*;
import javax.media.control.TrackControl;
import javax.media.control.QualityControl;
import javax.media.Format;
import javax.media.format.*;
import javax.media.datasink.*;
import javax.media.protocol.*;
import javax.media.protocol.DataSource;
import java.io.IOException;
import com.sun.media.format.WavAudioFormat;
/**
* A sample program to transcode an input source to an output location
* with different data formats.
*/
public class Transcode implements ControllerListener, DataSinkListener {
public boolean doIt(MediaLocator inML, MediaLocator outML, Format fmts[],
int start, int end) {
Processor p;
try {
System.err.println("- create processor for: " + inML);
p = Manager.createProcessor(inML);
} catch (Exception e) {
System.err.println("Yikes! Cannot create a processor from the given url: " + e);
return false;
}
p.addControllerListener(this);
// Put the Processor into configured state.
p.configure();
if (!waitForState(p, p.Configured)) {
System.err.println("Failed to configure the processor.");
return false;
}
setContentDescriptor(p, outML);
if (!setTrackFormats(p, fmts))
return false;
p.realize();
if (!waitForState(p, p.Realized)) {
System.err.println("Failed to realize the processor.");
return false;
}
// Set the JPEG quality to .5.
setJPEGQuality(p, 0.5f);
// Now, we'll need to create a DataSink.
DataSink dsink;
if ((dsink = createDataSink(p, outML)) == null) {
System.err.println("Failed to create a DataSink for the given output MediaLocator: " + outML);
return false;
}
dsink.addDataSinkListener(this);
fileDone = false;
// Set the start time if there's one set.
if (start > 0)
p.setMediaTime(new Time((double)start));
// Set the stop time if there's one set.
if (end > 0)
p.setStopTime(new Time((double)end));
System.err.println("start transcoding...");
// OK, we can now start the actual transcoding.
try {
p.start();
dsink.start();
} catch (IOException e) {
System.err.println("IO error during transcoding");
return false;
}
// Wait for EndOfStream event.
waitForFileDone();
// Cleanup.
try {
dsink.close();
} catch (Exception e) {}
p.removeControllerListener(this);
System.err.println("...done transcoding.");
return true;
}
/**
* Set the content descriptor based on the given output MediaLocator.
*/
void setContentDescriptor(Processor p, MediaLocator outML) {
ContentDescriptor cd;
if ((cd = fileExtToCD(outML.getRemainder())) != null) {
System.err.println("- set content descriptor to: " + cd);
if ((p.setContentDescriptor(cd)) == null) {
p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW));
}
}
}
/**
* Set the target transcode format on the processor.
*/
boolean setTrackFormats(Processor p, Format fmts[]) {
if (fmts.length == 0)
return true;
TrackControl tcs[];
if ((tcs = p.getTrackControls()) == null) {
System.err.println("The Processor cannot transcode the tracks to the given formats");
return false;
}
for (int i = 0; i < fmts.length; i++) {
System.err.println("- set track format to: " + fmts[i]);
if (!setEachTrackFormat(p, tcs, fmts[i])) {
System.err.println("Cannot transcode any track to: " + fmts[i]);
return false;
}
}
return true;
}
/**
* We'll loop through the tracks and try to find a track
* that can be converted to the given format.
*/
boolean setEachTrackFormat(Processor p, TrackControl tcs[], Format fmt) {
Format supported[];
Format f;
for (int i = 0; i < tcs.length; i++) {
supported = tcs[i].getSupportedFormats();
if (supported == null)
continue;
for (int j = 0; j < supported.length; j++) {
if (fmt.matches(supported[j]) &&
(f = fmt.intersects(supported[j])) != null &&
tcs[i].setFormat(f) != null) {
// Success.
return true;
}
}
}
return false;
}
/**
* Setting the encoding quality to the specified value on the JPEG encoder.
* 0.5 is a good default.
*/
void setJPEGQuality(Player p, float val) {
Control cs[] = p.getControls();
QualityControl qc = null;
VideoFormat jpegFmt = new VideoFormat(VideoFormat.JPEG);
// Loop through the controls to find the Quality control for
// the JPEG encoder.
for (int i = 0; i < cs.length; i++) {
if (cs[i] instanceof QualityControl &&
cs[i] instanceof Owned) {
Object owner = ((Owned)cs[i]).getOwner();
if (owner instanceof Codec) {
Format fmts[] = ((Codec)owner).getSupportedOutputFormats(null);
for (int j = 0; j < fmts.length; j++) {
if (fmts[j].matches(jpegFmt)) {
qc = (QualityControl)cs[i];
qc.setQuality(val);
System.err.println("- Set quality to " +
val + " on " + qc);
break;
}
}
}
if (qc != null)
break;
}
}
}
/**
* Create the DataSink.
*/
DataSink createDataSink(Processor p, MediaLocator outML) {
DataSource ds;
if ((ds = p.getDataOutput()) == null) {
System.err.println("Something is really wrong: the processor does not have an output DataSource");
return null;
}
DataSink dsink;
try {
System.err.println("- create DataSink for: " + outML);
dsink = Manager.createDataSink(ds, outML);
dsink.open();
} catch (Exception e) {
System.err.println("Cannot create the DataSink: " + e);
return null;
}
return dsink;
}
Object waitSync = new Object();
boolean stateTransitionOK = true;
/**
* Block until the processor has transitioned to the given state.
* Return false if the transition failed.
*/
boolean waitForState(Processor p, int state) {
synchronized (waitSync) {
try {
while (p.getState() < state && stateTransitionOK)
waitSync.wait();
} catch (Exception e) {}
}
return stateTransitionOK;
}
/**
* Controller Listener.
*/
public void controllerUpdate(ControllerEvent evt) {
if (evt instanceof ConfigureCompleteEvent ||
evt instanceof RealizeCompleteEvent ||
evt instanceof PrefetchCompleteEvent) {
synchronized (waitSync) {
stateTransitionOK = true;
waitSync.notifyAll();
}
} else if (evt instanceof ResourceUnavailableEvent) {
synchronized (waitSync) {
stateTransitionOK = false;
waitSync.notifyAll();
}
} else if (evt instanceof EndOfMediaEvent) {
evt.getSourceController().close();
} else if (evt instanceof MediaTimeSetEvent) {
System.err.println("- mediaTime set: " +
((MediaTimeSetEvent)evt).getMediaTime().getSeconds());
} else if (evt instanceof StopAtTimeEvent) {
System.err.println("- stop at time: " +
((StopAtTimeEvent)evt).getMediaTime().getSeconds());
evt.getSourceController().close();
}
}
Object waitFileSync = new Object();
boolean fileDone = false;
boolean fileSuccess = true;
/**
* Block until file writing is done.
*/
boolean waitForFileDone() {
System.err.print(" ");
synchronized (waitFileSync) {
try {
while (!fileDone) {
waitFileSync.wait(1000);
System.err.print(".");
}
} catch (Exception e) {}
}
System.err.println("");
return fileSuccess;
}
/**
* Event handler for the file writer.
*/
public void dataSinkUpdate(DataSinkEvent evt) {
if (evt instanceof EndOfStreamEvent) {
synchronized (waitFileSync) {
fileDone = true;
waitFileSync.notifyAll();
}
} else if (evt instanceof DataSinkErrorEvent) {
synchronized (waitFileSync) {
fileDone = true;
fileSuccess = false;
waitFileSync.notifyAll();
}
}
}
/**
* Convert a file name to a content type. The extension is parsed
* to determine the content type.
*/
ContentDescriptor fileExtToCD(String name) {
String ext;
int p;
// Extract the file extension.
if ((p = name.lastIndexOf('.')) < 0)
return null;
ext = (name.substring(p + 1)).toLowerCase();
String type;
// Use the MimeManager to get the mime type from the file extension.
if ( ext.equals("mp3")) {
type = FileTypeDescriptor.MPEG_AUDIO;
} else {
if ((type = com.sun.media.MimeManager.getMimeType(ext)) == null)
return null;
type = ContentDescriptor.mimeTypeToPackageName(type);
}
return new FileTypeDescriptor(type);
}
/**
* Main program
*/
public static void main(String [] args) {
System.exit(0);
}
/**
* Create a media locator from the given string.
*/
static MediaLocator createMediaLocator(String url) {
MediaLocator ml;
if (url.indexOf(":") > 0 && (ml = new MediaLocator(url)) != null)
return ml;
if (url.startsWith(File.separator)) {
if ((ml = new MediaLocator("file:" + url)) != null)
return ml;
} else {
String file = "file:" + System.getProperty("user.dir") + File.separator + url;
if ((ml = new MediaLocator(file)) != null)
return ml;
}
return null;
}
/**
* Parse the video format specifier and generate an VideoFormat.
* A valid video format specifier is of the form:
* [encoding]:[widthXheight]
*/
static Format parseVideoFormat(String fmtStr) {
String encodeStr = null, sizeStr = null;
// Parser the media locator to extract the requested format.
if (fmtStr != null && fmtStr.length() > 0) {
while (fmtStr.length() > 1 && fmtStr.charAt(0) == ':')
fmtStr = fmtStr.substring(1);
// Now see if there's a encode rate specified.
int off = fmtStr.indexOf(':');
if (off == -1) {
if (!fmtStr.equals(""))
encodeStr = fmtStr;
} else {
encodeStr = fmtStr.substring(0, off);
sizeStr = fmtStr.substring(off + 1);
}
}
if (encodeStr == null || encodeStr.equals(""))
prUsage();
if (sizeStr == null)
return new VideoFormat(encodeStr);
int width = 320, height = 240;
int off = sizeStr.indexOf('X');
if (off == -1)
off = sizeStr.indexOf('x');
if (off == -1) {
System.err.println("Video dimension is not correctly specified: " + sizeStr);
prUsage();
} else {
String widthStr = sizeStr.substring(0, off);
String heightStr = sizeStr.substring(off + 1);
try {
Integer integer = Integer.valueOf(widthStr);
if (integer != null)
width = integer.intValue();
integer = Integer.valueOf(heightStr);
if (integer != null)
height = integer.intValue();
} catch (Throwable t) {
prUsage();
}
return new VideoFormat(encodeStr,
new Dimension(width, height),
VideoFormat.NOT_SPECIFIED, // maxDataLen
null, // data class
VideoFormat.NOT_SPECIFIED // FrameRate
);
}
return null;
}
static void prUsage() {
System.err.println("Usage: java Transcode -o
