Play and save rtp streams

Hello
I need help can someone tell me how i play and save at the same time an rtp stream?
Thanks

Thanks for your response.
Very much appreciated. Was very informative.
This is my current situation with 3 your suggestions:
Daniele,
Your suggestion 1’s result:
In Wireshark ----> Under Statistics --->I have VoIP calls.
(I don’t see VoIP calls under Telephony –> may be a different version of Wireshark).
Anyway, there is only one call because the Wireshark had a Capture Filter to track information between one source and one destination IP address. So I select that call and click on Player button and then click on Decode button. Then I select the forward stream (From IP1 to IP2) and click on play and I don’t hear anything at all. All silence. Same when I select the reverse stream from IP2 to IP1 and play.
Your suggestion 2’s result:
In Wireshark ---> Under Statistics ---> I Selected Stream Analysis (Did not select Show All Streams – not sure what the difference is) then ---> Save Payload ----> Select “au” instead of raw and it says – “Can’t save in a file:saving in au format supported only for alaw / ulaw stream
Your suggestion 3’s result:
Saved the file in .raw format. Opened Audacity and imported the file as raw and specified FIRST the A-Law codec for G.711A and selected 8000hz and that didn’t work and SECOND tried the u-Law coding for G.711u and selected the sample frequency again equal to 8000 Hz and that didn't work.
Didn't work means:
When I played the imported information I get all noise (like heavy metallic sound) and no voice.
So my guess is that this capture is neither A-Law or u-Law codec - right. This capture was given to me by a customer.
Any other suggestions – much appreciated Daniele.

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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
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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
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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.

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use this cloneable DataSource to create two datasource "saveDataSource" and "playDataSource",playDataSourceis used to play,saveDataSource is used to save;
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but i can not hear anything ,if i use ds to create a player ,i can hear the voice.
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Play an rtp stream and save at the same time

Hello
How cam i play and save at the same time an rtp stream.
can anyone help me about this.
Thanks

Hello
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can anyone help me about this.
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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.
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From the LabVIEW Help description:
Sound File Write Simple (Windows, Linux)
Writes data from an array of waveforms to a .wav file. This VI automatically opens, writes to, and closes the .wav file. Windows You must have DirectX 8.0 or later to use this VI. Linux You must have the Open Sound System (OSS) driver to use this VI.
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So, for example, you could run your single waveform into the Build Array function and get an array of waveforms containing only your waveform. You could then wire this array of waveforms to the Sound File Write Simple.vi. This is shown in the image below.
Message Edited by Matt A on 06-28-2007 09:58 PM
Matt Anderson
Hardware Services Marketing Manager
National Instruments
Attachments:
Build Array.JPG ‏11 KB

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.
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Please give suggestion on how to resolve this issue.

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

How to play/record at same time and save image from video

i started working on a project and that made my life hell although it was so simple. reason was that i couldnt find small/simple code to understand problems and no proper documents. . finally i have done that. and here is the code (without much complex code of interface). it shows vidoe, records a small part of it at start and takes a snapshot (no buttons or events involved). hope it might help someone starting to learn JMF.
import java.io.*;
import java.awt.*;
import java.net.*;
import java.awt.event.*;
import java.util.Vector;
import javax.media.*;
import javax.media.rtp.*;
import javax.media.rtp.event.*;
import javax.media.rtp.rtcp.*;
import javax.media.protocol.*;
import javax.media.protocol.DataSource;
import javax.media.format.AudioFormat;
import javax.media.format.VideoFormat;
import javax.media.Format;
import javax.media.format.FormatChangeEvent;
import javax.media.control.BufferControl;
import javax.media.control.FrameGrabbingControl;
import javax.imageio.ImageIO;
import java.util.Date;
import javax.media.util.BufferToImage;
import java.awt.image.BufferedImage;
* AVReceive2 to receive RTP transmission using the new RTP API.
public class AVReceive2 implements ReceiveStreamListener, SessionListener,
ControllerListener
public static DataSource ds2, ds, ds3;
String sessions[] = null;
RTPManager mgrs[] = null;
Vector playerWindows = null;
boolean dataReceived = false;
Object dataSync = new Object();
public AVReceive2(String sessions[]) {
this.sessions = sessions;
public static DataSource getData() {
return ds;
protected boolean initialize() {
try {
InetAddress ipAddr;
SessionAddress localAddr = new SessionAddress();
SessionAddress destAddr;
mgrs = new RTPManager[sessions.length];
playerWindows = new Vector();
SessionLabel session;
// Open the RTP sessions.
for (int i = 0; i < sessions.length; i++) {
// Parse the session addresses.
try {
session = new SessionLabel(sessions);
} catch (IllegalArgumentException e) {
System.err.println("Failed to parse the session address given: " + sessions[i]);
return false;
System.err.println(" - Open RTP session for: addr: " + session.addr + " port: " + session.port + " ttl: " + session.ttl);
mgrs[i] = (RTPManager) RTPManager.newInstance();
mgrs[i].addSessionListener(this);
mgrs[i].addReceiveStreamListener(this);
ipAddr = InetAddress.getByName(session.addr);
if( ipAddr.isMulticastAddress()) {
// local and remote address pairs are identical:
localAddr= new SessionAddress( ipAddr,
session.port,
session.ttl);
destAddr = new SessionAddress( ipAddr,
session.port,
session.ttl);
} else {
localAddr= new SessionAddress( InetAddress.getLocalHost(),
session.port);
destAddr = new SessionAddress( ipAddr, session.port);
mgrs[i].initialize( localAddr);
// You can try out some other buffer size to see
// if you can get better smoothness.
BufferControl bc = (BufferControl)mgrs[i].getControl("javax.media.control.BufferControl");
if (bc != null)
bc.setBufferLength(350);
mgrs[i].addTarget(destAddr);
} catch (Exception e){
System.err.println("Cannot create the RTP Session: " + e.getMessage());
return false;
// Wait for data to arrive before moving on.
long then = System.currentTimeMillis();
long waitingPeriod = 30000; // wait for a maximum of 30 secs.
try{
synchronized (dataSync) {
while (!dataReceived &&
System.currentTimeMillis() - then < waitingPeriod) {
if (!dataReceived)
System.err.println(" - Waiting for RTP data to arrive...");
dataSync.wait(1000);
} catch (Exception e) {}
if (!dataReceived) {
System.err.println("No RTP data was received.");
close();
return false;
return true;
public boolean isDone() {
//return playerWindows.size() == 0;
return false;
* Close the players and the session managers.
protected void close() {
for (int i = 0; i < playerWindows.size(); i++) {
try {
((PlayerWindow)playerWindows.elementAt(i)).close();
} catch (Exception e) {}
playerWindows.removeAllElements();
// close the RTP session.
for (int i = 0; i < mgrs.length; i++) {
if (mgrs[i] != null) {
mgrs[i].removeTargets( "Closing session from AVReceive2");
mgrs[i].dispose();
mgrs[i] = null;
PlayerWindow find(Player p) {
for (int i = 0; i < playerWindows.size(); i++) {
PlayerWindow pw = (PlayerWindow)playerWindows.elementAt(i);
if (pw.player == p)
return pw;
return null;
PlayerWindow find(ReceiveStream strm) {
for (int i = 0; i < playerWindows.size(); i++) {
PlayerWindow pw = (PlayerWindow)playerWindows.elementAt(i);
if (pw.stream == strm)
return pw;
return null;
* SessionListener.
public synchronized void update(SessionEvent evt) {
if (evt instanceof NewParticipantEvent) {
Participant p = ((NewParticipantEvent)evt).getParticipant();
System.err.println(" - A new participant had just joined: " + p.getCNAME());
* ReceiveStreamListener
public synchronized void update( ReceiveStreamEvent evt) {
RTPManager mgr = (RTPManager)evt.getSource();
Participant participant = evt.getParticipant();     // could be null.
ReceiveStream stream = evt.getReceiveStream(); // could be null.
if (evt instanceof RemotePayloadChangeEvent) {
System.err.println(" - Received an RTP PayloadChangeEvent.");
System.err.println("Sorry, cannot handle payload change.");
System.exit(0);
else if (evt instanceof NewReceiveStreamEvent) {
try {
stream = ((NewReceiveStreamEvent)evt).getReceiveStream();
//DataSource
ds2 = stream.getDataSource(); // this original cant be used now
// ds is used to play video
ds = Manager.createCloneableDataSource(ds2);
// ds3 is used to record video
ds3 = ((SourceCloneable)ds).createClone();
// 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());
// create a player by passing datasource to the Media Manager
Player p = javax.media.Manager.createPlayer(ds);
if (p == null)
return;
p.addControllerListener(this);
p.realize();
PlayerWindow pw = new PlayerWindow(p, stream);
playerWindows.addElement(pw);
// Notify intialize() that a new stream had arrived.
synchronized (dataSync) {
dataReceived = true;
dataSync.notifyAll();
} catch (Exception e) {
e.printStackTrace();
return;
else if (evt instanceof StreamMappedEvent) {
if (stream != null && stream.getDataSource() != null) {
DataSource ds = stream.getDataSource();
// Find out the formats.
RTPControl ctl = (RTPControl)ds.getControl("javax.media.rtp.RTPControl");
System.err.println(" - The previously unidentified stream ");
if (ctl != null)
System.err.println(" " + ctl.getFormat());
System.err.println(" had now been identified as sent by: " + participant.getCNAME());
else if (evt instanceof ByeEvent) {
System.err.println(" - Got \"bye\" from: " + participant.getCNAME());
PlayerWindow pw = find(stream);
if (pw != null) {
pw.close();
playerWindows.removeElement(pw);
* ControllerListener for the Players.
public synchronized void controllerUpdate(ControllerEvent ce) {
Player p = (Player)ce.getSourceController();
if (p == null)
return;
// Get this when the internal players are realized.
if (ce instanceof RealizeCompleteEvent) {
PlayerWindow pw = find(p);
if (pw == null) {
// Some strange happened.
System.err.println("Internal error!");
System.exit(-1);
pw.initialize();
pw.setVisible(true);
p.start();
try {
// make it wait so that video can start otherwise image will be null. u must call this method with a button
Thread.sleep(2500);
catch (Exception e) {
e.printStackTrace();
// Grab a frame from the capture device
FrameGrabbingControl frameGrabber = (FrameGrabbingControl) p.getControl(
"javax.media.control.FrameGrabbingControl");
Buffer buf = frameGrabber.grabFrame();
// Convert frame to an buffered image so it can be processed and saved
Image img = (new BufferToImage( (VideoFormat) buf.getFormat()).
createImage(buf));
BufferedImage buffImg = new BufferedImage(img.getWidth(null),
img.getHeight(null),
BufferedImage.TYPE_INT_RGB);
Graphics2D g = buffImg.createGraphics();
g.drawImage(img, null, null);
// Overlay curent time on image
g.setColor(Color.RED);
g.setFont(new Font("Verdana", Font.BOLD, 12));
g.drawString( (new Date()).toString(), 10, 25);
try { // Save image to disk as PNG
ImageIO.write(buffImg, "jpeg", new File("c:\\webcam.jpg"));
catch (Exception e) {
e.printStackTrace();
// this will record the video for a few seconds. this should also be called properly by menu or buttons
record(ds3);
if (ce instanceof ControllerErrorEvent) {
p.removeControllerListener(this);
PlayerWindow pw = find(p);
if (pw != null) {
pw.close();
playerWindows.removeElement(pw);
System.err.println("AVReceive2 internal error: " + ce);
* A utility class to parse the session addresses.
class SessionLabel {
public String addr = null;
public int port;
public int ttl = 1;
SessionLabel(String session) throws IllegalArgumentException {
int off;
String portStr = null, ttlStr = null;
if (session != null && session.length() > 0) {
while (session.length() > 1 && session.charAt(0) == '/')
session = session.substring(1);
// Now see if there's a addr specified.
off = session.indexOf('/');
if (off == -1) {
if (!session.equals(""))
addr = session;
} else {
addr = session.substring(0, off);
session = session.substring(off + 1);
// Now see if there's a port specified
off = session.indexOf('/');
if (off == -1) {
if (!session.equals(""))
portStr = session;
} else {
portStr = session.substring(0, off);
session = session.substring(off + 1);
// Now see if there's a ttl specified
off = session.indexOf('/');
if (off == -1) {
if (!session.equals(""))
ttlStr = session;
} else {
ttlStr = session.substring(0, off);
if (addr == null)
throw new IllegalArgumentException();
if (portStr != null) {
try {
Integer integer = Integer.valueOf(portStr);
if (integer != null)
port = integer.intValue();
} catch (Throwable t) {
throw new IllegalArgumentException();
} else
throw new IllegalArgumentException();
if (ttlStr != null) {
try {
Integer integer = Integer.valueOf(ttlStr);
if (integer != null)
ttl = integer.intValue();
} catch (Throwable t) {
throw new IllegalArgumentException();
* GUI classes for the Player.
class PlayerWindow extends Frame {
Player player;
ReceiveStream stream;
PlayerWindow(Player p, ReceiveStream strm) {
player = p;
stream = strm;
public void initialize() {
add(new PlayerPanel(player));
public void close() {
player.close();
setVisible(false);
dispose();
public void addNotify() {
super.addNotify();
pack();
* GUI classes for the Player.
class PlayerPanel extends Panel {
Component vc, cc;
PlayerPanel(Player p) {
setLayout(new BorderLayout());
if ((vc = p.getVisualComponent()) != null)
add("Center", vc);
if ((cc = p.getControlPanelComponent()) != null)
add("South", cc);
public Dimension getPreferredSize() {
int w = 0, h = 0;
if (vc != null) {
Dimension size = vc.getPreferredSize();
w = size.width;
h = size.height;
if (cc != null) {
Dimension size = cc.getPreferredSize();
if (w == 0)
w = size.width;
h += size.height;
if (w < 160)
w = 160;
return new Dimension(w, h);
public void record(DataSource ds) {
Format formats[] = new Format[1];
formats[0] = new VideoFormat(VideoFormat.CINEPAK);
FileTypeDescriptor outputType =
new FileTypeDescriptor("video.x_msvideo");
Processor p = null;
try {
p = Manager.createRealizedProcessor(new ProcessorModel(ds,formats,
outputType));
} catch (IOException e) {
e.printStackTrace();
} catch (NoProcessorException e) {
e.printStackTrace();
} catch (CannotRealizeException e) {
e.printStackTrace();
// get the output of the processor
DataSource source = p.getDataOutput();
// create a File protocol MediaLocator with the location
// of the file to
// which bits are to be written
MediaLocator dest = new MediaLocator("file://vvv.mpeg");
// create a datasink to do the file writing & open the
// sink to make sure
// we can write to it.
DataSink filewriter = null;
try {
filewriter = Manager.createDataSink(source, dest);
filewriter.open();
} catch (NoDataSinkException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
// now start the filewriter and processor
try {
filewriter.start();
} catch (IOException e) {
e.printStackTrace();
p.start();
try {
Thread.sleep(10000);
}catch(Exception e) { }
p.close();
filewriter.close();
// stop and close the processor when done capturing...
// close the datasink when EndOfStream event is received...
public static void main(String argv[]) {
//     if (argv.length == 0)
//     prUsage();
String[] a = new String[1];
a[0] = ("192.168.0.45/4002");
AVReceive2 avReceive = new AVReceive2(a);
if (!avReceive.initialize()) {
System.err.println("Failed to initialize the sessions.");
System.exit(-1);
// Check to see if AVReceive2 is done.
try {
while (!avReceive.isDone())
Thread.sleep(1000);
} catch (Exception e) {}
System.err.println("Exiting AVReceive2");
static void prUsage() {
System.err.println("Usage: AVReceive2 <session> <session> ...");
System.err.println(" <session>: <address>/<port>/<ttl>");
//System.exit(0);
}// end of AVReceive2
so here the code. all messed up. coz i have just completed it and havent worked on interface or formatting this code properly (didnt have much time). but hope it will help. ask me if u have any questions. dont want others to have those basic problems that i had to face.

u did a good effort for the JMF beginners i appreciate that....thanks i lot....i need you help in a project in
which i have to connect to a d-link 950G IP camera and process that
mpeg-4 stream (i know there are some problems in JMF and mpeg4) and show it over applet of JFrame.
IP is 172.25.35.22
Edited by: alchemist on Jul 16, 2008 6:09 AM

Save a rtp stream to a file

hi,
I can send and receive a rtp stream. Now I want to save a received rtp stream to a file,but i got an exception when create
a DataSink:
public synchronized void update(ReceiveStreamEvent evt) {
        RTPManager mgr = (RTPManager) evt.getSource();
        Participant participant = evt.getParticipant();
        ReceiveStream stream = evt.getReceiveStream();
        if (evt instanceof NewReceiveStreamEvent) {
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Well gee wiz, I should would like to help you with your exception with your data sink...
But you didn't post what exceptino you were getting, so I can't help you...
And the code you posted has nothing to do with a DataSink to begin with, so I can't help you again...

How to extract data from Buffer and create a RTP stream

Hi
I'm working on a project where I need to interrupt a media stream (video and audio) and extract the data. Send the data with a custom protocol. On the recieveing side I would like to reconstruct the stream using only the data chunks.
I'm currently looking at [DataSourceReader.java|http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/DataSourceReader.java] and more specifically at a method like printDataInfo(Buffer buffer) to extract the data.
Is it possible to create a RTP stream, only having access to the byte array "data" in Buffer ?
Thanks in advance.

camelstrike wrote:
Hi
I'm working on a project where I need to interrupt a media stream (video and audio) and extract the data. Send the data with a custom protocol. On the recieveing side I would like to reconstruct the stream using only the data chunks.
I'm currently looking at [DataSourceReader.java|http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/DataSourceReader.java] and more specifically at a method like printDataInfo(Buffer buffer) to extract the data.
There are a couple of different ways to get the data. Reading it from inside a DataSink is perfectly fine...
Is it possible to create a RTP stream, only having access to the byte array "data" in Buffer ?Yes and no.
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/CustomPayload.html]
You need to know the format of the media in addition to the actual media data...

I have a Macbook Air (july 2012) with OS X 10.8.3 installed. I have dvds with .vob files and have Quicktime Version 10.2 (603.12). I can't play the DVDs. Thereare some features of QT that I like, e.g. precise frame selection and save as .png file-help

I have a Macbook Air (july 2012) with OS X 10.8.3 installed. I have dvds with .vob files and have Quicktime Version 10.2 (603.12). I can't play the DVDs. There are some features of QT that I like, e.g. precise frame selection and save as .png file-help. Am I missing some Apple software? I thought QT for Mountain Lion could convert the .vob files - is there some setting that I have missed?
Any suggestions that preserves a simple workflow much appreciated.

arthur wrote:
Perian is here: Perian - The swiss-army knife of QuickTime® components
Perian will be retired soon.

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

Play and save rtp streams

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