Good morning! I have these VideoChatRTP class I got [here](Good morning! I have these VideoChatRTP class I got here (I just added the main) and an EncodingUtilClass class from here.) (I just added the main) and an EncodingUtilClass class from .
VideoChatRTP.java
import javax.media.rtp.*;
import javax.media.*;
import javax.media.protocol.*;
import java.awt.Image;
import java.io.*;
import java.net.*;
import com.sun.media.ui.*;
/**
* A RTP over UDP player which will receive RTP UDP packets and stream
* them to the JMF RTP Player or (RTPSM) which is not aware of the
* underlying network/transport protocol. This sample uses the
* interfaces defined in javax.media.rtp.RTPSocket and its related classes.
*/
public class VideoChatRTP implements ControllerListener{
/**
* RTP Session address, multicast, unicast or broadcast address
*/
String address = "";
/**
* RTP Session port
*/
int port = 49200;
/**en
* Media Type i.e. one of audio or video
*/
String media = "video";
/////////////DO NOT CHANGE ANYTHING BELOW THIS LINE//////////////////////////
// our main rtpsocket abstraction to which we will create and send
// to the Manager for appropriate handler creation
RTPSocket rtpsocket = null;
// the control RTPIODataSource of the RTPSocket above
RTPPushDataSource rtcpsource = null;
// The GUI to handle our player
PlayerWindow playerWindow;
// The handler created for our RTP session, as returned by the Manager
Player player = null;
// maximum size of buffer for UDP receive from the sockets
private int maxsize = 2000;
UDPHandler rtp = null;
UDPHandler rtcp = null;
public VideoChatRTP(String address, int port){
this.address = address;
this.port = port;
try {
// create the RTPSocket
rtpsocket = new RTPSocket();
// set its content type : rtpraw/video for a video session and
// rtpraw/audio for an audio session
String content = "rtpraw/" + media;
rtpsocket.setContentType(content);
// set the RTP Session address and port of the RTP data
rtp = new UDPHandler(address, port);
// set the above UDP Handler to be the sourcestream of the rtpsocket
rtpsocket.setOutputStream(rtp);
// set the RTP Session address and port of the RTCP data
rtcp = new UDPHandler(address, port +1);
// get a handle over the RTCP Datasource so that we can set
// the sourcestream and deststream of this source to the rtcp
// udp handler we created above.
rtcpsource = rtpsocket.getControlChannel();
// Since we intend to send RTCP packets from the network to
// RTPSM and vice-versa, we need to set the RTCP UDP handler
// as both the input and output stream of the rtcpsource.
rtcpsource.setOutputStream(rtcp);
rtcpsource.setInputStream(rtcp);
// set the dynamic info on the RTPSocket, so that we can
// playback DVI as well
if (media.equals("audio"))
EncodingUtil.Init(rtpsocket);
// start & connect the RTP socket data source before creating
// the player
try{
rtpsocket.connect();
player = Manager.createPlayer(rtpsocket);
//rtpsocket.start();
} catch (NoPlayerException e){
System.err.println(e.getMessage());
// e.printStackTrace();
return;
}
catch (IOException e){
System.err.println(e.getMessage());
// e.printStackTrace();
return;
}
if (player != null){
player.addControllerListener(this);
// send this player to out playerwindow
playerWindow = new PlayerWindow(player);
}
}
catch (Exception e) { System.out.println("could not connect to RTP stream."); }
}
public synchronized void controllerUpdate(ControllerEvent ce) {
if ((ce instanceof DeallocateEvent) ||
(ce instanceof ControllerErrorEvent)){
// stop udp handlers
if (rtp != null)
rtp.close();
if (rtcp != null)
rtcp.close();
}
}
// method used by inner class UDPHandler to open a datagram or
// multicast socket as the case maybe
private DatagramSocket InitSocket(String sockaddress, int sockport){
InetAddress addr = null;
DatagramSocket sock = null;
try{
addr = InetAddress.getByName(sockaddress);
if (addr.isMulticastAddress()){
MulticastSocket msock = new MulticastSocket(sockport);
msock.joinGroup(addr);
sock = (DatagramSocket)msock;
}else{
sock = new
DatagramSocket(sockport,addr);
}
return sock;
}
catch (SocketException e){
e.printStackTrace();
return null;
}
catch (UnknownHostException e){
e.printStackTrace();
return null;
}
catch (IOException e){
e.printStackTrace();
return null;
}
}// end of InitSocket
//INNER CLASS UDPHandler which will receive UDP RTP Packets and
//stream them to the handler of the sources stream. IN case of
//RTCP , it will also accept RTCP packets and send them on the
//underlying network.
public class UDPHandler extends Thread implements PushSourceStream, OutputDataStream{
DatagramSocket mysock = null;
DatagramPacket dp = null;
SourceTransferHandler outputhandler = null;
String myaddress = null;
int myport;
boolean closed = false;
// in the constructor we open the socket and create the main
// UDPHandler thread.
public UDPHandler(String haddress, int hport){
myaddress = haddress;
myport = hport;
mysock = InitSocket(myaddress,myport);
setDaemon(true);
start();
}
// the main thread simply receives RTP data packets from the
// network and transfer's this data to the output handler of
// this stream.
public void run(){
int len;
while(true){
if (closed){
cleanup();
return;
}
try{
do{
dp = new DatagramPacket(new byte[maxsize],maxsize);
mysock.receive(dp);
if (closed){
cleanup();
return;
}
len = dp.getLength();
if (len > (maxsize >> 1))
maxsize = len << 1;
}
while (len >= dp.getData().length);
}catch (Exception e){
cleanup();
return;
}
if (outputhandler != null)
outputhandler.transferData(this);
}
}
public void close(){
closed = true;
}
private void cleanup(){
mysock.close();
stop();
}
// methods of PushSourceStream
public Object[] getControls() {
return new Object[0];
}
public Object getControl(String controlName) {
return null;
}
public ContentDescriptor getContentDescriptor(){
return null;
}
public long getContentLength(){
return SourceStream.LENGTH_UNKNOWN;
}
public boolean endOfStream(){
return false;
}
// method by which data is transferred from the underlying
// network to the RTPSM.
public int read(byte buffer[], int offset, int length) {
System.arraycopy(dp.getData(),
0,
buffer,
offset,
dp.getLength());
return dp.getData().length;
}
public int getMinimumTransferSize(){
return dp.getLength();
}
public void setTransferHandler(SourceTransferHandler transferHandler){
this.outputhandler = transferHandler;
}
// methods of PushDestStream used by teh RTPSM to transfer
// data to the underlying network.
public int write(byte[] buffer, int offset, int length) {
InetAddress addr = null;
try{
addr = InetAddress.getByName(myaddress);
}catch (UnknownHostException e){
}
DatagramPacket dp = new DatagramPacket(buffer,length,addr,myport);
try{
mysock.send(dp);
}catch (IOException e){}
return dp.getLength();
}
}
public static void main(String[] args)
{
try
{
new VideoChatRTP("239.1.2.3", 1234);
}
catch (Exception ex)
{
ex.printStackTrace();
System.exit(0);
}
}
EncodingUtilClass.java
import javax.media.rtp.RTPPushDataSource;
import javax.media.rtp.RTPControl;
import javax.media.rtp.RTPSocket;
import javax.media.rtp.SessionManager;
import javax.media.Format;
import javax.media.format.AudioFormat;
public class EncodingUtil {
private static final String rtpcontrol = "javax.media.rtp.RTPControl";
public static void Init(RTPPushDataSource ds){
RTPControl control = (RTPControl)ds.getControl(rtpcontrol);
if (control == null){
//System.out.println("The datasource " + ds +
// "\n does not support the RTPControl interface..." +
// "\nexiting from EncodingUtil.Init()");
return;
}
Init(control);
}
public static void Init(SessionManager mgr){
Format format = null;
if (mgr == null)
return;
format = new AudioFormat(AudioFormat.DVI, 44100, 8, 1);
mgr.addFormat(format, 18);
}
public static void Init(RTPControl control){
Format format = null;
if (control == null)
return;
format = new AudioFormat(AudioFormat.DVI, 44100, 8, 1);
control.addFormat(format, 18);
}
}
When I run the program, it catches the NoPlayerException and prints Cannot find a Player for: javax.media.rtp.RTPSocket@1eb0.
Whole error message if printStackTrace:
Cannot find a Player for: javax.media.rtp.RTPSocket@1dee400
javax.media.NoPlayerException: Cannot find a Player for: javax.media.rtp.RTPSocket@1dee400
at javax.media.Manager.createPlayerForSource(Manager.java:1512)
at javax.media.Manager.createPlayer(Manager.java:500)
at VideoChatRTP.<init>(VideoChatRTP.java:80)
at VideoChatRTP.main(VideoChatRTP.java:280)
I have taken into consideration the JAR files and put the jmf.properties in the same folder where the JAR files are. Please help me fix this. I'm still learning Java. Thank you in advance.