Processor on incoming RTP stream

I'm attaching a processor to an incoming audio ReceiveStream sent via RTPManager.
The processor is so that I can record the ReceiveStream to a file via a DataSink.
Sometimes the processor fails to configure and I can't figure out why, but other times it configures ok and carries on to process the incoming audio stream.
I always create and configure the processor on the StreamMappedEvent of the ReceiveStream.
During testing, I'm always sending the same audio via RTP to my receiving class, so I'm really not sure why sometimes the processor should fail to configure but other times it works fine.
Is this why all the examples using processors always have a waitForState and then a check for the processor being configured ?
I had to slightly amend the waitForState method so that it gives up after a certain amount of time, otherwise it would loop forever waiting for the processor to configure.

Is this why all the examples using processors always have a waitForState and then a check for the processor being configured ?
I had to slightly amend the waitForState method so that it gives up after a certain amount of time, otherwise it would loop forever waiting for the processor to configure.
If you look (again) at the examples - they do block at various stages in the 'configuration' process
If your App doesn't like this mechanism (after all the examples are just that) then perhaps you should seperate out your code and use the Listener Interfaces

Similar Messages

Simultaneous Recording in file and playing incoming rtp stream

I want to Simultaneous Recording in file and playing incoming rtp stream.I have cloned the data source. After cloning I created two data sinks and two processors.One processor/datasink is meant for recording the stream in a file and other processor/data sink is used to play the rtp through speaker.
But at a time I am only able to achieve one operation i.e either recording or playing.For recording into the wav file I have to put Thread.sleep(30) so that I can record the rtp into the file.During this time I am not able to play the audio through speaker.I also create separate thread but this does not help.
Please give suggestion on how to resolve this issue.

thanks for the reply, but I think I've already solved the problem.

Can I play and save the incoming RTP streams simultenously

Hi,
I want to whether i can play and save the incoming RTP stream simultenously using
JMF 2.1. The idea is by saving in the file, i can playback the same file later time
Is there any example code aviliable.
Thanks in Advance
bye
Srikanth

I think this, today, it's impossible lamentably. By but that I have tried it, I have not been able to obtain it.
If exists someone that it has obtained it, please, help us with this subject. It's very important.
Thanks

Retransmission of an incoming RTP stream

i have made an application that transmits a video from a PC1 (server) to another PC2 (client). The client plays the video and it is supposed to listen for new connections from other clients. If there is a second client that wants to receive the video from PC2 he must be able to watch the video from the begining and not the video that the client on PC2 watches at that time. On PC2 the incoming stream from the server is stored on a cloneable datasource and i thought that i could just transmit the clones of this datasource and give the cloneable to the player, but i read that the clones for this kind of datasources don't work well and act exactly like the cloneable, this means they are transmitting exactly what the client in PC2 watches and they don't play the whole video from the beginning.
the video is about 1 min long.
i have also used buffercontrol on the manager of the client (PC2) to buffer the incoming video
if anyone has any ideas of how i could build this system please help because i got very confused.
thanx

Hi,
i know that this thread is quite old but however i have to try. Tzam i am doing exactly the same thing and have exactly the same problem. Clones work, everything is ok but the video is not transmitting from the begging to the next client. I tried to stop the clone but i'm facing problems. I'll try putting the received stream in a buffer then clone the buffer for transmission to next client. If u have finished your project i would really appreciate any help. Some code if possible too, but that's not so important. Any hints? Sth anyway
Thanksss

Mixing audio RTP-Streams to conference

I'm trying to create a telefon conference applikation with jmf.
My problem:
I need to mix multiple incomming RTP-Streams (Audio/G711_ulaw) together into one outgoing RTP-Stream.
If I use a MergingDataSource i can get one DataSource with multiple Tracks, but i'm not able to send them out together over one RTP-Session.
Is there any way to do this?
I have also thaught about using RawBufferMux or WAVMux to multiplex the tracks included in the MergingDataSource ,but i cant find out how to use them.
Or is there an easyer way to create an conference over RTP?
I need to connect to cisco ip-phones, so i can only use the g711_ulaw codec.
Is there anyone out who can help me?

Im sorry, but I met this problem in past and find it impossible to resolve.
Im also thought about MergingDataSource, about Many2One class and more and more but nothing I could use. And nobody could answer this question in this forum half of year ago.
Oh, nearly forgot: it is possible to write merged streams to file, seems possible to write them into file and then to transmit it to net from file. But how to realize more than one Processor?..

Merging RTP streams and writing to file

I'm am in the middle of project using JMF i'm trying to merge incoming RTP streams and write them to file but i always have problem with formats. I have created processor with merged DataSource i set ContentDescriptor to different FileTypeDescriptors and tried to transcode the RTP streams to different formats, but always processor couldnt realize because of this error:
Unable to handle format: LINEAR, 8000.0 Hz, 16-bit, Mono, LittleEndian, Signed
Unable to handle format: LINEAR, 8000.0 Hz, 16-bit, Mono, LittleEndian, Signed
Could someone tell me what content descriptors i need to use and what formats to solve this problem. Any help will be appreciated.
Message was edited by:
kaligula

Hello,
Here is a procedure i wrote to write on text files the content of any table (and also generate the insert SQL order)
http://oracle.developpez.com/sources/?page=developpement#Extraction_table
You can download the script file here http://sheikyerbouti.developpez.com/src/extraction_table.zip
Hope this help you.
Francois

Adding Effect on an incoming H.263/RTP stream

Hi,
I am playing an h.263/rtp stream which is multicasted over a network. I want to play the file with rotation or some other effect added to it. I tried to see following link for some help(as the forums suggested):- http://java.sun.com/products/java-media/jmf/2.1.1/solutions/RotationEffect.html. But the link is disabled and new link which they are providing does not contain the example.
Can any of me help me how to add the effect on h263/rtp.
Though i already created my effect class and tried adding it. But could not add the effect.
Kindly give me some directions.

Is there some error in above code or if there is some other issue.There's an error in the above code because you're assuming I'm being imprecise with my language. I am not.
You must copy the data from the input buffer to the output buffer...
Buffer objects are wrappers around byte[], and you cannot copy data from one array to another by modifying the object references...which is what your code does.
public int process(Buffer inBuffer, Buffer outBuffer) {
    // Make sure the output buffer will hold data
    if (!(outBuffer.getData() instanceof byte[])) {
        outBuffer.setData(new byte[inBuffer.getLength()]);
        outBuffer.setLength(inBuffer.getLength());
        outBuffer.setOffset(0);
    // Make sure the output buffer is long enough
    if (outBuffer.getLength() + outBuffer.getOffset() < inBuffer.getLength())) {
        int offset = outBuffer.getOffset();
        int length = inBuffer.getLength() + outBuffer.getOffset();
        byte[] oldData = (byte[])outBuffer.getData();
        byte[] newData = new byte[length];
        // Copy the previous data
        for (int i = 0; i < offset; i++) {
            newData[i] = oldData;
// Set the variables for the output buffer
outBuffer.setData(newData);
outBuffer.setLength(length);
outBuffer.setOffset(offset);
// Copy the data from in to out
int j = outBuffer.getOffset();
for (int i = inBuffer.getOffset(); i < inBuffer.getOffset() + inBuffer.getLength(); i++) {
((byte[])outBuffer.getData())[j++] = ((byte[])inBuffer.getData())[i];
return BUFFER_PROCESSED_OK;
That's untested code above, fix my dumb mistakes as necessary.

Writing a conference server for RTP streams

Hello,
I'm trying to write a conference server which accepts multiple RTP streams (one for each participant), creates a mixed RTP stream of all other participants and sends that stream back to each participant.
For 2 participants, I was able to correctly receive and send the stream of the other participant to each party.
For 3 participants, creating the merging data source does not seem to work - i.e. no data is received by the participants.
I tried creating a cloneable data sources instead, thinking that this may be the root cause, but when creating cloneable data sources from incoming RTP sources, I am unable to get the Processor into Configured state, it seems to deadlock. Here's the code outline :
    Iterator pIt = participants.iterator();
    List dataSources = new ArrayList();
    while(pIt.hasNext()) {
      Party p = (Party) pIt.next();
      if(p!=dest) {
        DataSource ds = p.getDataSource();
        DataSource cds = Manager.createCloneableDataSource(ds);
        DataSource clone= ((SourceCloneable)cds).createClone();
        dataSources.add(clone);
    Object[] sources = dataSources.toArray(new DataSource[0]);
    DataSource dataSource =   Manager.createMergingDataSource((DataSource[])sources);
    Processor p = Manager.createProcessor(dataSource);
    MixControllerListener cl = new MixControllerListener();
    p.addControllerListener(cl);
    // Put the Processor into configured state.
    p.configure();
    if (!cl.waitForState(p, p.Configured)) {
        System.err.println("Failed to configure the processor.");
        assert false;
    }Here are couple of stack traces :
"RTPEventHandler" daemon prio=1 tid=0x081d6828 nid=0x3ea6 in Object.wait() [98246000..98247238]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x9f37e4a8> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:429)
        at demo.Mixer$MixControllerListener.waitForState(Mixer.java:248)
        - locked <0x9f37e4a8> (a java.lang.Object)
        at demo.Mixer.createMergedDataSource(Mixer.java:202)
        at demo.Mixer.createSendStreams(Mixer.java:165)
        at demo.Mixer.createSendStreamsWhenAllJoined(Mixer.java:157)
        - locked <0x9f481840> (a demo.Mixer)
        at demo.Mixer.update(Mixer.java:123)
        at com.sun.media.rtp.RTPEventHandler.processEvent(RTPEventHandler.java:62)
        at com.sun.media.rtp.RTPEventHandler.dispatchEvents(RTPEventHandler.java:96)
        at com.sun.media.rtp.RTPEventHandler.run(RTPEventHandler.java:115)
"JMF thread: com.sun.media.ProcessEngine@a3c5b6[ com.sun.media.ProcessEngine@a3c5b6 ] ( configureThread)" daemon prio=1 tid=0x082fe3c8 nid=0x3ea6 in Object.wait() [977e0000..977e1238]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x9f387560> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:429)
        at com.sun.media.parser.RawBufferParser$FrameTrack.parse(RawBufferParser.java:247)
        - locked <0x9f387560> (a java.lang.Object)
        at com.sun.media.parser.RawBufferParser.getTracks(RawBufferParser.java:112)
        at com.sun.media.BasicSourceModule.doRealize(BasicSourceModule.java:180)
        at com.sun.media.PlaybackEngine.doConfigure1(PlaybackEngine.java:229)
        at com.sun.media.ProcessEngine.doConfigure(ProcessEngine.java:43)
        at com.sun.media.ConfigureWorkThread.process(BasicController.java:1370)
        at com.sun.media.StateTransitionWorkThread.run(BasicController.java:1339)
"JMF thread" daemon prio=1 tid=0x080db410 nid=0x3ea6 in Object.wait() [97f41000..97f41238]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x9f480578> (a com.ibm.media.protocol.CloneableSourceStreamAdapter$PushBufferStreamSlave)
        at java.lang.Object.wait(Object.java:429)
        at com.ibm.media.protocol.CloneableSourceStreamAdapter$PushBufferStreamSlave.run(CloneableSourceStreamAdapter.java:375)
        - locked <0x9f480578> (a com.ibm.media.protocol.CloneableSourceStreamAdapter$PushBufferStreamSlave)
        at java.lang.Thread.run(Thread.java:534)Any ideas ?
Thanks,
Jarek

bgl,
I was able to get past the cloning issue by following the Clone.java example to the letter :)
Turns out that the cloneable data source must be added as a send stream first, and then the clonet data source. Now for each party in the call the conf. server does the following :
Party(RTPManager mgr,DataSource ds) {
      this.mgr=mgr;
      this.ds=Manager.createCloneableDataSource(ds);
   synchronized DataSource cloneDataSource() {
      DataSource retVal;
      if(getNeedsCloning()) {
        retVal = ((SourceCloneable) ds).createClone();
      } else {
        retVal = ds;
        setNeedsCloning();
      return retVal;
    private void setNeedsCloning() {
      needsCloning=true;
    private boolean getNeedsCloning() {
      return needsCloning;
     private synchronized void addSendStreamFromNewParticipant(Party newOne) throws UnsupportedFormatException, IOException {
    debug("*** - New one joined. Creating the send streams. Curr count :" + participants.size());
    Iterator pIt = participants.iterator();
    while(pIt.hasNext()) {
      Party p = (Party)pIt.next();
      assert p!=newOne;
      // update existing participant
      SendStream sendStream = p.getMgr().createSendStream(newOne.cloneDataSource(),0);
      sendStream.start();
      // send data from existing participant to the new one
      sendStream = newOne.getMgr().createSendStream(p.cloneDataSource(),0);
      sendStream.start();
    debug("*** - Done creating the streams.");So I made some progress, but I'm still not quite there.
The RTP manager JavaDoc for createSendStream states the following :
* This method is used to create a sending stream within the RTP
* session. For each time the call is made, a new sending stream
* will be created. This stream will use the SDES items as entered
* in the initialize() call for all its RTCP messages. Each stream
* is sent out with a new SSRC (Synchronisation SouRCe
* identifier), but from the same participant i.e. local
* participant. <BR>
For 3 participants, my conf. server creates 2 send streams to every one of them, so I'd expect 2 SSRCs on the wire. Examining the RTP packets in Ethereal, I only see 1 SSRC, as if the 2nd createSendStream call failed. Consequently, each participany in the conference is able to receive voice from only 1 other participant, even though I create RTPManager instance for each participany, and add 2 send streams.
Any ideas ?
Thanks,
Jarek

How to synchronize audio and video rtp-streams

Hi everyone!
I've tried to make one of the processors, processor1, control the other processor, processor2, with processor1.addController(processor2) but I get a
javax.media.IncompatibleTimeBaseException. I need to synchronize audio and video rtp-streams because they are sometimes completely out of sync.
In JMF API Guide I've read:
"2. Determine which Player object's time base is going to be used to drive
the other Player objects and set the time base for the synchronized
Player objects. Not all Player objects can assume a new time base.
For example, if one of the Player objects you want to synchronize has
a *push-data-source*, that Player object's time base must be used to
drive the other Player objects."
I'm using a custom AVReceive3 to receive rtp-streams and then I create processors for the incoming stream's datasource's, and they are ALL PushBufferDataSource's.
Does this mean I can't synchronize these. If so is there any way I can change them into Pull...DataSources ?
How are you supposed to sync audio and video if not with as above ?

camelstrike wrote:
Hi everyone!
I've tried to make one of the processors, processor1, control the other processor, processor2, with processor1.addController(processor2) but I get a
javax.media.IncompatibleTimeBaseException. I need to synchronize audio and video rtp-streams because they are sometimes completely out of sync.
In JMF API Guide I've read:
"2. Determine which Player object's time base is going to be used to drive
the other Player objects and set the time base for the synchronized
Player objects. Not all Player objects can assume a new time base.
For example, if one of the Player objects you want to synchronize has
a *push-data-source*, that Player object's time base must be used to
drive the other Player objects."
I'm using a custom AVReceive3 to receive rtp-streams and then I create processors for the incoming stream's datasource's, and they are ALL PushBufferDataSource's.
Does this mean I can't synchronize these. If so is there any way I can change them into Pull...DataSources ?The RTP packets are timestamped when they leave, and they are played in order. You can't change the timebase on an RTP stream because, for all intensive purposes, it's "live" data. It plays at the speed the transmitting RTP server wants it to play, and it never gets behind because it drops out of order and old data packets.
If your RTP streams aren't synced correctly on the receiving end, it means they aren't being synced on the transmitting end...so you should look into the other side of the equation.

Write(Export) the RTP Stream from a SIP Call to an audio file

I am working on telephony system that need record each call to a file.
I got the RTP Stream in ReceiveStreamEvent handler and start to record
the problem is i got a file and play it but there are any sounds
when i set FileTypeDescriptor.WAVE and AudioFormat.ULAW
I try out the FileTypeDescriptor.WAVE and AudioFormat.IMA4_MS, i got a fixed size file with 60kb
if the FileTypeDescriptor.MPEG_AUDIO and AudioFormat.MPEG, the processor cannot be realize,
the thread is blocked!!
Could anyone save me? thanks in advanced!
=================================Code===================================================
public void update(ReceiveStreamEvent evt){
logger.debug("received a new incoming stream. " + evt);
RTPManager mgr = (RTPManager) evt.getSource();
Participant participant = evt.getParticipant(); // could be null.
ReceiveStream stream = evt.getReceiveStream(); // could be null.
if (evt instanceof NewReceiveStreamEvent)
try
stream = ( (NewReceiveStreamEvent) evt).getReceiveStream();
DataSource ds = stream.getDataSource();
          recorder = new CallRecorderImpl(ds);
recorder.start();
catch (Exception e)
logger.error("NewReceiveStreamEvent exception ", e);
return;
========================================================================================
this is the CallRecorderImpl Class
public class CallRecorderImpl implements DataSinkListener, ControllerListener {
     private Processor processor = null;
     private DataSink dataSink = null;
     private DataSource source = null;
     private boolean bRecording = false;
     FileTypeDescriptor contentType = new FileTypeDescriptor(FileTypeDescriptor.WAVE);
     Format encoding = new AudioFormat(AudioFormat.IMA4_MS);
MediaLocator dest = new MediaLocator("file:/c:/bar.wav");
     public CallRecorderImpl(DataSource ds) {
          this.source = ds;
     public void start() {
          try {
               processor = Manager.createProcessor(source);
               processor.addControllerListener(this);
               processor.configure();
          } catch (Exception e) {
               System.out.println("exception:" + e);
     public void stop() {
          try {
               System.out.println("stopping");
               this.dataSink.stop();
               this.dataSink.close();
          } catch (Exception ep) {
               ep.printStackTrace();
     public void controllerUpdate(ControllerEvent evt) {
          Processor pr = (Processor) evt.getSourceController();
          if (evt instanceof ConfigureCompleteEvent) {
               System.out.println("ConfigureCompleteEvent");
               processConfigured(pr);
          if (evt instanceof RealizeCompleteEvent) {
               System.out.println("RealizeCompleteEvent");
               processRealized(pr);
          if (evt instanceof ControllerClosedEvent) {
               System.out.println("ControllerClosedEvent");
          if (evt instanceof EndOfMediaEvent) {
               System.out.println("EndOfMediaEvent");
               pr.stop();
          if (evt instanceof StopEvent) {
               System.out.println("StopEvent");
               pr.close();
               try {
                    dataSink.stop();
                    dataSink.close();
               } catch (Exception ee) {
                    ee.printStackTrace();
     public void dataSinkUpdate(DataSinkEvent event) {
          if (event instanceof EndOfStreamEvent) {
               try {
                    System.out.println("EndOfStreamEvent");
                    dataSink.stop();
                    dataSink.close();
                    System.exit(1);
               } catch (Exception e) {
     public void processConfigured(Processor p) {
          // Set the output content type
          p.setContentDescriptor(this.contentType);
          // Get the track control objects
          TrackControl track[] = p.getTrackControls();
          boolean encodingPossible = false;
          // Go through the tracks and try to program one of them
          // to output ima4 data.
          for (int i = 0; i < track.length; i++) {
          try {
               track.setFormat(this.encoding);
               encodingPossible = true;
          } catch (Exception e) {
               track[i].setEnabled(false);
          if (!encodingPossible) {
               System.out.println("cannot encode to " + this.encoding);
          return;
          p.realize();
     public void processRealized(Processor p) {
          System.out.println("Entered processRealized");
DataSource source = p.getDataOutput();
try {
     dataSink = Manager.createDataSink(source, dest);
     dataSink.open();
     dataSink.start();
     dataSink.addDataSinkListener(new DataSinkListener() {
                    public void dataSinkUpdate(DataSinkEvent e) {
                         if (e instanceof EndOfStreamEvent) {
                              System.out.println("EndOfStreamEvent");
                              dataSink.close();
} catch (Exception e) {
     e.printStackTrace();
     return;
          p.start();
============================================

Which shows that the output stream cannot be of that particulat format and descriptor.
Look at this code
import javax.swing.*;
import javax.media.*;
import java.net.*;
import java.io.*;
import javax.media.datasink.*;
import javax.media.protocol.*;
import javax.media.format.*;
import javax.media.control.*;
class Abc implements ControllerListener
     DataSource ds;
     DataSink sink;
     Processor pr;
     MediaLocator mc;
     public void maam() throws Exception
          mc=new MediaLocator("file:C:/Workspace/aaaaa.mpg");
          pr=Manager.createProcessor(new URL("file:G:/java files1/jmf/aa.mp3"));
          pr.addControllerListener(this);
          pr.configure();
     public void controllerUpdate(ControllerEvent e)
          if(e instanceof ConfigureCompleteEvent)
               System.out.println ("ConfigureCompleteEvent");
                         Processor p = (Processor)e.getSourceController();
               System.out.println ("ConfigureCompleteEvent");
                     processConfigured(p);
          if(e instanceof RealizeCompleteEvent)
               System.out.println ("RealizeCompleteEvent");
                       Processor p = (Processor)e.getSourceController();
                         processRealized(p);
          if(e instanceof ControllerClosedEvent)
                     System.out.println ("ControllerClosedEvent");
                 if(e instanceof EndOfMediaEvent)
                    System.out.println ("EndOfMediaEvent");
                    Processor p = (Processor)e.getSourceController();
                    p.stop();
             if(e instanceof StopEvent)
                     System.out.println ("StopEvent");
                     Processor p = (Processor)e.getSourceController();
                     p.close();
               try
                    sink.stop();
                    sink.close();
               catch(Exception ee)
     public void processConfigured(Processor p)
          System.out.println("Entered processConfigured");
          p.setContentDescriptor (new FileTypeDescriptor (FileTypeDescriptor.MPEG_AUDIO));
            /*    TrackControl track[] = p.getTrackControls ();
             boolean encodingPossible = false;
             for (int i = 0; i < track.length; i++)
                  try
                       track.setFormat (new VideoFormat (VideoFormat.MPEG));
               encodingPossible = true;
               catch (Exception e)
               track[i].setEnabled (false);
     p.realize();
     public void processRealized(Processor p)
          pr=p;
          System.out.println("Entered processRealized");
          try
               MediaLocator dest = new MediaLocator("file:C:/Workspace/ring1.mpg");
               sink = Manager.createDataSink(p.getDataOutput(), dest);
          sink.addDataSinkListener(new DataSinkListener()
                    public void dataSinkUpdate(DataSinkEvent e)
                         if(e instanceof EndOfStreamEvent)
                    System.out.println ("EndOfStreamEvent");
                              sink.close();
               sink.open();
               sink.start();
          catch(Exception eX)
          System.out.println("Just before start");
          p.start();
/*     public void dataSinkUpdate(DataSinkEvent event)
          if(event instanceof EndOfStreamEvent)
               try
                    System.out.println("EndOfStreamEvent");
                    dsk.stop();
                    dsk.close();
                    System.exit(1);
               catch(Exception e)
public class JMFCapture6
     public static void main(String args[]) throws Exception
          Abc a=new Abc();
          a.maam();

Receiving Video RTP Stream (JMF) in JME ( MMAPI ) - URGENT !!!

Hi Folks...
I�m trying to develop an application that sends the images from a web cam connected to the computer, to the PDA that the images can be viewed by the user...
My code for the JMF RTP Video Stream is as follows.
Processor proc = null;
          javax.media.protocol.DataSource ds = null;
          TrackControl[] tc = null;
          int y;
          boolean encodingOk = false;
          Vector<javax.media.protocol.DataSource> datasources = new Vector<javax.media.protocol.DataSource>();
          for( int x = 0 ; x < camerasInfo.length ; x++ ){
               try {
                    proc = Manager.createProcessor(camerasInfo[x].getLocator());
               }catch (NoProcessorException e) { System.out.println("Erro ao int�nciar PROCESSOR: " + e);     }
                catch (IOException e) { System.out.println("Erro ao int�nciar PROCESSOR: " + e); }
               proc.configure();
               try {
                    Thread.sleep(2000);
               } catch (InterruptedException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
               proc.setContentDescriptor( new ContentDescriptor(ContentDescriptor.RAW_RTP) );
               tc = proc.getTrackControls();
               for( y = 0; y < tc.length ; y++ ){
                    if (!encodingOk && tc[y] instanceof FormatControl){
                         if( ( (FormatControl) tc[y] ).setFormat( new VideoFormat(VideoFormat.RGB) ) != null ){
                              tc[y].setEnabled(true);
                         }else{
                              encodingOk = true;
                    }else{
                         tc[y].setEnabled(false);
               proc.realize();
               try {
                    Thread.sleep(2000);
               } catch (InterruptedException e1) {
                    e1.printStackTrace();
               try{
                    ds = proc.getDataOutput();
               }catch(NotRealizedError e){
                    System.out.println("ERRO ao realizar datasource: " + e);
               }catch(ClassCastException e){
                    System.out.println("Erro ao realizar datasource: " + e);
               datasources.add(ds);
               System.out.println( ds.getLocator() );
               encodingOk = false;
          MediaLocator ml = new MediaLocator("rtp://10.1.1.100:99/video");
          try {
               DataSink datSink = Manager.createDataSink(ds , ml);
               datSink.open();
               datSink.start();
          } catch (NoDataSinkException e) {
               System.out.println("Erro ao instanciar DataSink: " + e );
          } catch (SecurityException e) {
               System.out.println("Erro ao iniciar DataSink: " + e);
          } catch (IOException e) {
               System.out.println("Erro ao iniciar DataSink: " + e);
          }I�m not sure if this code is correctly... it is ?
So... the next part of the systems runs on the PDA..
The code that access this RTP Stream is as follows..
          VideoControl c = null;
          try {
               player = Manager.createPlayer("rtp://10.1.1.100:99/video");
               c = (VideoControl) player.getControl("VideoControl");
               tela = (Item) c.initDisplayMode( GUIControl.USE_GUI_PRIMITIVE, null);
               player.start();
               append(tela);
          } catch (IOException e) {
               str.setText(e.toString());
               append( str );
          } catch (MediaException e) {
               str.setText(e.toString());
               append( str );
          }So when the APP try to create a player for "rtp://10.1.1.100:99/video" an MediaException is throwed..
javax.microedition.media.MediaException: Unable to create Player for the locator: rtp://10.1.1.100:99/video
So... I don�t know what happen =/
The error is in the PDA module ? Or in the computer�s initialization off the RTP Video Streaming ?
I need finish this job at next week... so any help is usefull..
Waiting for answers
Rodrigo Kerkhoff

First of all: before going onto the j2me part, make sure the server works, before doing anything else! Apparently, it doesn't...
The MediaLocator is generally used to specify a kind of URL depicting where the data put into the datasink should go to. In your case, This cannot be just some URL where you want it to act as a rtps server. You'll need to implement that server yourself I guess.

RTP stream - record and listen simultaneously ...

Hi!
I would like to record and listen RTP stream simultaneously, but I don't know how... I can record to a file OR listen in headphone but just separately.
If i create a datasink for recording on a port I cannot use that port to listen. But in this case how can I listen the audio stream on headphone?
Maybe the good solution would be for me if I could clone the stream but I cannot do, because I get an exception
javax.media.NoProcessorException: Cannot find a Processor for: com.ibm.media.protocol.CloneablePushBufferDataSource@1d8957fThis is the code:
DataSource ds = Manager.createCloneableDataSource(Manager.createDataSource(media_locator));
processor = Manager.createRealizedProcessor(new ProcessorModel(ds, formats, outputType));Has anybody got any idea?
Thanks!
Ric Flair

I'd point you in this direction initially.
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/Clone.java]

Using RTP stream as data source

I have successfully written a program that reads G.711 audio from a wav file and sends it out over the network.
I'm trying to modify that program so that instead of getting its source audio from a file, it instead receives the audio from an RTP stream. So, in effect, it is simply receiving audio from one socket and sending it back out another.
The error I'm encountering:
[java] javax.media.NoProcessorException: Cannot find a Processor for: rtp://172.30.18.140:32916
[java] at javax.media.Manager.createProcessorForContent(Manager.java:1663)
[java] at javax.media.Manager.createProcessor(Manager.java:627)
Here is the code fragment where the exception occurs:
processor = javax.media.Manager.createProcessor(new MediaLocator("rtp://172.30.18.140:32916"));
Can anybody help? Thanks!
<removed funky formatting><br>
Message was edited by:
feh

Hi,
I Had a very similar problem, but in addiction I had to store data in a buffer before retransmission. I resolved it employing low level classes. At this time, I still do not know any other solution, and nobody helped me in any way, also in this forum...
So, first you have to access single frames of the stream (Buffer or ExtBuffer objects) using a RawBufferParser, then you have to reconstruct a DataSource by multiplexing the frames (use an appropriate Multiplexer class, such as RTPSynchBufferMux).
The big problem is that there is no documentation avalaible about how to use these classes: I have lerned all I know by "reverse engineering" (lots of hours spent in reading very long annoying code). A little help can be given by the PlugIn Viewer of JMStudio, that tells you which classes are to be employed.
I have not tried to retransmit data "straightforward", without access single frames, because that was not my task. Maybe if you use RTPManager, it is possible to get a DataSource by the ReceiveStream object, and then to pass it to another RTPManager to create a SendStream.
I do not know any simpler way to do that, but this does not mean that it does not exist...!
good luck.
Alberto M. (Italy)

Attempting to write RTP stream to wave

I have been working long and hard trying to figure out to save an RTP stream from a Cisco phone to a wave. I need the wave file to be in the format ULAW, 8khz, 8 bit mono.
Through much research this is the code I come up with but I does not work. I states that I am trying to get a datasink for null when I try to create the filewriter datasink.
I also have gotten the following error message with other version of the code below:
newReceiveStreamEvent exception Cannot find a DataSink for: com.sun.media.protocol.rtp.DataSource@3680c1
When I get the RTP stream I get the following as the format of the input stream:
- Recevied new RTP stream: ULAW/rtp, 8000.0 Hz, 8-bit, Mono
else if (evt instanceof NewReceiveStreamEvent) {
     try {
          stream = ((NewReceiveStreamEvent)evt).getReceiveStream();
Format formats[] = new Format[1];
formats[0] = new AudioFormat(AudioFormat.LINEAR,8000,8,1);
FileTypeDescriptor outputType = new FileTypeDescriptor(FileTypeDescriptor.WAVE);
DataSource ds = stream.getDataSource();
          // Find out the formats.
          RTPControl ctl = (RTPControl)ds.getControl("javax.media.rtp.RTPControl");
          if (ctl != null){
          System.err.println(" - Recevied new RTP stream: " + ctl.getFormat());
          } else
          System.err.println(" - Recevied new RTP stream");
          if (participant == null)
          System.err.println(" The sender of this stream had yet to be identified.");
          else {
          System.err.println(" The stream comes from: " + participant.getCNAME());
ProcessorModel processorModel = new ProcessorModel(ds, formats, null);
Processor processor = Manager.createRealizedProcessor(processorModel);
          processor.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP));
MediaLocator f = new MediaLocator("file:/C:/output.wav");
DataSink filewriter = null;
DataSource tempds = processor.getDataOutput();
filewriter = Manager.createDataSink(tempds, f);
filewriter.open();
Edited by: phodat on Sep 16, 2010 10:17 PM
Edited by: phodat on Sep 16, 2010 10:20 PM

The content descriptor is designed to specify the output format, not the input format. The input format is specified by the DataSource automatically, and you set the content descriptor to whatever you want the output format to be. In this case, you'd want to set it to a WAV file.
You'd then need to go through all of the Track objects on the processor and set their output format to the ULAW specifications as you want there.
[http://www.cs.odu.edu/~cs778/spring04/lectures/jmfsolutions/examplesindex.html]
There's actually an example program that exports RTP streams, you can probably use that code without modification to fit your needs.

RTP streaming

Hi guys,
what I need to do is to stream YUV images between two JMF applications. I am using VideoTransmit application (taken from this site) to transmit and JMStudio to receive. From a little research I have noticed the following to transmit:
1) Create the DataSource using the Manager.CreateDataSource(MediaLocator)
2) create processor using the above created datasource
3) create player etc.
My question now is the following:
How can I transmit a YUV file? How can I create the DataSource which has this YUV file without having problems for the further creation of processor etc?
Thanks in advance guys,
Chris

Ok, I think I know what was confusing me. Apparently the setRate() isn't effecting the rate of stream. The audio file I am streaming runs about five minutes usually, so I sped the rate up to 10. It sped the process of writing to a file up significantly, but writing to an RTP stream seems to take the full run-time of the file. Does this sound right or is there something else I'm missing?
Thanks,
Khanathor

Processor on incoming RTP stream

Similar Messages

Maybe you are looking for