Using JMF

I have just started using jmf i have created an application and on the machine with jmf installed the application works as expected.
Migrated to another machine without JMF it does not work. i get a
noclassdeffounderror: /javax/media/cannotrealizeexception.
Does this mean that jmf has to be installed on every machine that uses this application?
Is there a way of getting around this, as my application is for certain people who may not want to install this.

nuthin required...jus download it

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Please someone help in capturing the live streaming in a file using JMF......
Thanks..

Hi, I have a problem with RTPExport output video files. One side streams H263/RTP(AVTransmit2.java) and other write this steam to a file by RTPExport.java. When network conditions are ideal, output video file has same fps and same number of frames like original file. Problem occures, when theres packet lost in network, then output file has different fps,and also has less frames like original video(because it didnt write missing frames to file, and thats why it get shorter). Pls how can I achieve output file that will have the same fps like original one? How to write to file an identical copy of what I can see while receiveing video with AVReceive2.java? Its there a way to modifi rtpexport or avreceiver to do this? Thanks!

Playing a wav file (byte array) using JMF

Hi,
I want to play a wav file in form of a byte array using JMF. I have 2 classes, MyDataSource and MyPullBufferStream. MyDataSource class is inherited from PullStreamDataSource, and MyPullBufferStream is derived from PullBufferStream. When I run the following piece of code, I got an error saying "EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x7c9108b2, pid=3800, tid=1111". Any idea what might be the problem? Thanks.
File file = new File(filename);
byte[] data = FileUtils.readFileToByteArray(file);
MyDataSource ds = new MyDataSource(data);
ds.connect();
try
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catch (NoPlayerException e)
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if (player != null)
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     JMFrame jmframe = new JMFrame(player, filename);
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import java.io.IOException;
import javax.media.Time;
import javax.media.protocol.PullBufferDataSource;
import javax.media.protocol.PullBufferStream;
public class MyDataSource extends PullBufferDataSource
    protected Object[] controls = new Object[0];
    protected boolean started = false;
    protected String contentType = "raw";
    protected boolean connected = false;
    protected Time duration = DURATION_UNKNOWN;
    protected PullBufferStream[] streams = null;
    protected PullBufferStream stream = null;
    protected final byte[] data;
    public MyDataSource(final byte[] data)
        this.data = data;
    public String getContentType()
        if (!connected)
            System.err.println("Error: DataSource not connected");
            return null;
        return contentType;
    public void connect() throws IOException
        if (connected)
            return;
        stream = new MyPullBufferStream(data);
        streams = new MyPullBufferStream[1];
        streams[0] = this.stream;
        connected = true;
    public void disconnect()
        try
            if (started)
                stop();
        catch (IOException e)
        connected = false;
    public void start() throws IOException
        // we need to throw error if connect() has not been called
        if (!connected)
            throw new java.lang.Error(
                    "DataSource must be connected before it can be started");
        if (started)
            return;
        started = true;
    public void stop() throws IOException
        if (!connected || !started)
            return;
        started = false;
    public Object[] getControls()
        return controls;
    public Object getControl(String controlType)
        try
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            Object cs[] = getControls();
            for (int i = 0; i < cs.length; i++)
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return cs[i];
return null;
catch (Exception e)
// no such controlType or such control
return null;
public Time getDuration()
return duration;
public PullBufferStream[] getStreams()
if (streams == null)
streams = new MyPullBufferStream[1];
stream = streams[0] = new MyPullBufferStream(data);
return streams;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import javax.media.Buffer;
import javax.media.Control;
import javax.media.Format;
import javax.media.format.AudioFormat;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.PullBufferStream;
public class MyPullBufferStream implements PullBufferStream
private static final int BLOCK_SIZE = 500;
protected final ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW);
protected AudioFormat audioFormat = new AudioFormat(AudioFormat.GSM_MS, 8000.0, 8, 1,
Format.NOT_SPECIFIED, AudioFormat.SIGNED, 8, Format.NOT_SPECIFIED,
Format.byteArray);
private int seqNo = 0;
private final byte[] data;
private final ByteArrayInputStream bais;
protected Control[] controls = new Control[0];
public MyPullBufferStream(final byte[] data)
this.data = data;
bais = new ByteArrayInputStream(data);
public Format getFormat()
return audioFormat;
public void read(Buffer buffer) throws IOException
synchronized (this)
Object outdata = buffer.getData();
if (outdata == null || !(outdata.getClass() == Format.byteArray)
|| ((byte[]) outdata).length < BLOCK_SIZE)
outdata = new byte[BLOCK_SIZE];
buffer.setData(outdata);
byte[] data = (byte[])buffer.getData();
int bytes = bais.read(data);
buffer.setData(data);
buffer.setFormat(audioFormat);
buffer.setTimeStamp(System.currentTimeMillis());
buffer.setSequenceNumber(seqNo);
buffer.setLength(BLOCK_SIZE);
buffer.setFlags(0);
buffer.setHeader(null);
seqNo++;
public boolean willReadBlock()
return bais.available() > 0;
public boolean endOfStream()
return willReadBlock();
public ContentDescriptor getContentDescriptor()
return cd;
public long getContentLength()
return (long)data.length;
public Object getControl(String controlType)
try
Class cls = Class.forName(controlType);
Object cs[] = getControls();
for (int i = 0; i < cs.length; i++)
if (cls.isInstance(cs[i]))
return cs[i];
return null;
catch (Exception e)
// no such controlType or such control
return null;
public Object[] getControls()
return controls;

Here's some additional information. After making the following changes to MyPullBufferStream class, I can play a wav file with gsm-ms encoding with one issue: the wav file is played many times faster.
protected AudioFormat audioFormat = new AudioFormat(AudioFormat.GSM, 8000.0, 8, 1,
            Format.NOT_SPECIFIED, AudioFormat.SIGNED, 8, Format.NOT_SPECIFIED,
            Format.byteArray);
// put the entire byte array into the buffer in one shot instead of
// giving a portion of it multiple times
public void read(Buffer buffer) throws IOException
        synchronized (this)
            Object outdata = buffer.getData();
            if (outdata == null || !(outdata.getClass() == Format.byteArray)
                    || ((byte[]) outdata).length < BLOCK_SIZE)
                outdata = new byte[BLOCK_SIZE];
                buffer.setData(outdata);
            buffer.setLength(this.data.length);
            buffer.setOffset(0);
            buffer.setFormat(audioFormat);
            buffer.setData(this.data);
            seqNo++;
    }

How to use jmf convert the rtp packet (captured by jpcap) in to wav file?

I use the jpcap capture the rtp packets(payload: ITU-T G.711 PCMU ,from voip)
and now I want to use JMF read those data and convert in to wav file
How to do this? please help me

pedrorp wrote:
Hi Captfoss!
I fixed it but now I have another problem. My application send me this message:
Cannot initialize audio renderer with format: LINEAR, Unknown Sample Rate, 16-bit, Mono, LittleEndian, Signed
Unable to handle format: ALAW/rtp, Unknown Sample Rate, 8-bit, Mono, FrameSize=8 bits
Failed to prefetch: com.sun.media.PlaybackEngine@1b45ddc
Error: Unable to prefetch com.sun.media.PlaybackEngine@1b45ddc
This time the fail is prefetching. I have no idea why this problem is. Could you help me?The system cant play an audio file / stream if it doesn't know the sample rate...somewhere along the way, in your code, the sample rate got lost. Sample rates are highly important, because they tell the system how fast to play the file.
You need to go look through your code and find where the sample rate information is getting lost...

Error Playing .wav file on RHEL 4 using JMF

Hi,
We are using jmf api to play wav files on our application deployed on rhel version 4. But we are receiving the following error
**"Cannot find a Processor for: myfolder/myAudio.wav" --->
this exception is comming from javax.media.Manager
throw new NoProcessorException("Cannot find a Processor for: " + source);"**.
Any ideas what could be issue with this, am I missing some drivers/processor for wav files? I did a default jmf studio installation.
Thanks and Regards
Vikram Pancholi
Edited by: vpancholi on Sep 8, 2009 8:51 AM

If we take a look at the supported formats page...
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/formats.html]
And the WAV file is supported by the cross-platform pack, AKA, jmf.jar.
If you're unable to open a WAV file, I'd say it's most likely because you don't have JMF.jar on your library path. You can fix that at runtime with the switch -djava.library.path=<whatever>
That's what I would say the issue is.

Javafx use jmf and capture audio device

Hello, I noticed a problem with the use JavaFX and Java Media Framework (JMF), in a project javafx call Java classes using JMF, but are not recognized PC audio devices, in fact when I executed 's the code CaptureDeviceManager.getDeviceList (null), displays the error: "could not commit protocolPRefixList", without recognizing any audio device. Instead I call if my application using JMF, outside of a JavaFX project, the devices are found and everything works properly, perhaps this problem depends on the security settings of JavaFX, or inability to use JavaFX is that jmf interfaces with audio and video devices?
thanks for the help

I'd use jmf and javafx but it was not for capture devices.
If you use jmf there are native libraries.
The thing i found was about the java.library.path wich is overriden when you start javafx that jmf can't load approriate libs.
Try to compare the System.getProperties for java and javafx then you should find where is the problem.

How to connect to Digital Camera using JMF?

How to connect to Digital Camera using JMF?
Any example?
thx

If the DC has a mode that works like a web cam, and can generate either a VFW or DirecShow stream, then you could capture a frame of the stream, yes.

Is it possible to play mp3 without using JMF or JLayer??

hi,
i wan to play mp3 without using JMF or JLayer as just like .wav file.
If it is possible then anyone plz tell me how it can b done..please..
thnx.
Edited by: samratsinghal on Sep 11, 2009 10:21 AM

JavaSound does not have the functionality to play MP3 files.
That said, if you want to do it without using a library to decode the MP3 file for you, then you need to write your own MP3 decoder.

Using jmf when doing an install

when creating a program that is going to use jmf, does the host machine need to have jmf installed to do an rtp transmission of streaming video? or do i need to include a jmf.jar file in the installer package? or is the jmf pieces I need part of the jre 1.6u1
thanks

I would suggest you search for some of the good discussions about the hows and whys of redirecting content. There is a lot of information out there that I do not have the time at the moment to summerize here. But to make one brief point.
You can never 'nuke' a redirect once you put one in place and NOT risk getting 404 errors. Working with the assumption that your users have been notified that the page is moved AND that all users who have been such notified bothered to update their bookmarks. That still leaves out the set of users who may not have visited your page in the time frame that the redirect page existed. They will then get the dreaded 404 error because they where never told to update their bookmarks. This also does not account for users who are comming from old links from other web sites, printed material, or anywhere else the URL may have been published.
It is also possibe (but I'm not sure any current browser does this) that the client tool can automatically update a saved URI with new URI when it receives a proper permenant redirect. That is the way the standard reads at least.

Not able to recognize any video/audio devices using jmf and java soun

Hi ,
I need one help from your side.
Here I am expecting some clarifications from you. Before that let you my environement.
My working environment :
Eclipse tool and added jmf jar to my project I did not do any thing more.
If any thing I need to do just let me know. My target platform is MAC & UBUNTU.
Please bare with my questions.
1) I am not able to recognize any video/audio devices using jmf and java sound APIs on My system.
( I checked with the app mentioned in the http://www.java-forums.org/new-java/11201-jmf-cannot-connect-device.html )
Do we need any administrives rights for our working PC.
What is the procedure/ setup I need to follow from a java application to enable particular audio/video device since I dont about end-user system setup right.
If possible send some sample code to recognize /r detect audio device ( voice input ). It should run on both MAC and UBUNTU.
2) I run the one sample audio recording application of this link (http://www.jsresources.org/examples/SimpleAudioRecorder.java.html) which is provided by YOU.
I got output audio file and able to hear voice on UBUNTU system but not able to hear voice on MAC system.
I heared that default line in ( audio setup of the sys) is wont take any voice data on MAC.Why I made this stmt means we are getting false when using isSupported methods of JAVA SOUND API.
( like for TragetdataLine ...i,e, all ports are getting false)
I have one sample audio recording app implemented by QUICKTIME API. In this case also he taking audio ftom device only using quicetime API.
With that we are able to record and hear audio ( voice input --> not line in , external device we added some thing like SSB...)
3) In case of Video capturing DataSource, Streams are implemented by PullBufferDataSource , PullBufferStream intefaces used.
In case of Audio capturing DataSource, Streams are implemented by PushBufferDataSource, PushBufferStream intefaces used.
Can you explain the reasons ? I gone through API but i am not clear.
HOPE I WILL BE CLARIFIED EVERY THING FROM YOU.
Thanks
RamaRao.G

Hi ,
I need one help from your side.
Here I am expecting some clarifications from you. Before that let you my environement.
My working environment :
Eclipse tool and added jmf jar to my project I did not do any thing more.
If any thing I need to do just let me know. My target platform is MAC & UBUNTU.
Please bare with my questions.
1) I am not able to recognize any video/audio devices using jmf and java sound APIs on My system.
( I checked with the app mentioned in the http://www.java-forums.org/new-java/11201-jmf-cannot-connect-device.html )
Do we need any administrives rights for our working PC.
What is the procedure/ setup I need to follow from a java application to enable particular audio/video device since I dont about end-user system setup right.
If possible send some sample code to recognize /r detect audio device ( voice input ). It should run on both MAC and UBUNTU.
2) I run the one sample audio recording application of this link (http://www.jsresources.org/examples/SimpleAudioRecorder.java.html) which is provided by YOU.
I got output audio file and able to hear voice on UBUNTU system but not able to hear voice on MAC system.
I heared that default line in ( audio setup of the sys) is wont take any voice data on MAC.Why I made this stmt means we are getting false when using isSupported methods of JAVA SOUND API.
( like for TragetdataLine ...i,e, all ports are getting false)
I have one sample audio recording app implemented by QUICKTIME API. In this case also he taking audio ftom device only using quicetime API.
With that we are able to record and hear audio ( voice input --> not line in , external device we added some thing like SSB...)
3) In case of Video capturing DataSource, Streams are implemented by PullBufferDataSource , PullBufferStream intefaces used.
In case of Audio capturing DataSource, Streams are implemented by PushBufferDataSource, PushBufferStream intefaces used.
Can you explain the reasons ? I gone through API but i am not clear.
HOPE I WILL BE CLARIFIED EVERY THING FROM YOU.
Thanks
RamaRao.G

Problem with M-JPEG by using JMF and JPEGCodec .

Hi, there,
I want to implement a M-JPEG using JMF and JPEGCodec, is that possible?(I already been trapped)
My problem is I have a video clip which is a AVI file, the video format is following:
Video format: RGB, 160x120, FrameRate=14.9, Length=57600, 24-bit, Masks=3:2:1, P
ixelStride=3, LineStride=480, Flipped.
I already convered a frame to an Image object(video format with JPEG and CVID doesn't work) ,
I can also convert this Image back as a Buffer, It works fine with me .But to use JPEGCodec( provided by com.sun.image.codec.jpeg ) I need to convert an Image to a BufferedImage, I use the following defination:
BufferedImage bImage = new BufferedImage(frameImage.getWidth(null), frameImage.getHeigh(null),BufferedImage.TYPE_INT_RGB); It seems work, But when I use JPEGImageEncoder to encoder this bImage and save as a jpg file,
everything is black .
I also need to cast BufferedImage to an Image: frameImage = (Image) bImage; then I convert frameImage back to Buffer.My video clip still running , but every frame now became black .
can someone help me? thanks in advance.

I solved this problem . But I met a new problem.
I converted the above video clip into a JPEG and I want to create a DataSink for it. the messege is:
Video format: JPEG, 160x120, FrameRate=12.0, Length=3574
- set content descriptor to: AVI
- set track format to: JPEG
Cannot transcode any track to: JPEG
Cannot create the DataSink: javax.media.NoDataSinkException: Cannot find a DataS
ink for: com.sun.media.multiplexer.RawBufferMux$RawBufferDataSource@2b7eea
Transcoding failedHope some Java Experts can help me.
Regards.

URGENT- problem in detecting audio device using JMF in WIndows7 - 64 bit

Hi,
I am trying to detect the audio device in windows 7 -64 bit OS, using JMF API with JRE 1.6.18.But it showing zero device found.below i have mentioned the source code that i have used.please suggest how to solve this , thanks in advance.
import java.util.ArrayList;
import java.util.Vector;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.format.AudioFormat;
import javax.media.format.VideoFormat;
public class CaptureDeviceFinder {
//possible audio formats available
static String audioformats[] = {
AudioFormat.LINEAR };
static ArrayList available_audiolist= new ArrayList();
public static void main(String[] args) {
findAudioDevices();
}//main
public static void findAudioDevices() {
/ Audio capture devices /
System.out.println("CAPTURE AUDIO FORMATS:");
for (String format : audioformats) {
System.out.println("format is :"format);
Vector<CaptureDeviceInfo> devices = CaptureDeviceManager
.getDeviceList(new AudioFormat(format));
System.out.println("devices is"+devices);
for (CaptureDeviceInfo device : devices) {
if (!devices.isEmpty()) {
System.out.println("\tFormat: " format);
System.out.println("\t\t" device.getName());
available_audiolist.add(format"|"+device.getName());
System.out.println("list is :"+available_audiolist);
Edited by: Saravana4u on Mar 17, 2010 10:39 AM

almightywiz wrote:
Well, I don't know if the JMF Studio works on a 64-bit system, but the base java libraries work just as well as on a 32-bit system. I currently use both Windows 7 64-bit and 32-bit version, and I am able to recognize all of my audio input devices.JMF wraps around and makes use of a bunch of native interfaces, all of which are precompiled for 32-bit systems. As such, anything relying upon those 32-bit libraries will not work, and that cuts the functionality down to, essentially, the cross-platform pack stuff.
JMF's sound infastructure is mostly a wrapper around JavaSound, so as long as JavaSound is working on the JRE, you'll be able to utilize the audio functionality.
As for device detection, I know at least some of that is native code. I'm not 100% sure, but I'd almost expect the Windows performance pack to never return any devices on a 64-bit system, but the cross-platform back to return audio devices. This is an assumption, but, that's what I would expect.
In any case, if you're using the Windows performance pack, you'd most likely get better results by switching to the cross-platform pack.

Packet sniffer only picks up UDP and no RTP packets when using JMF???

Hi,
I am developing a voice mail application to interface with asterisk. Here is the problem.
I am using ethereal packet sniffer to sniff the packets. When I connect two regular SIP phones and sniff , I can sniff the RTP packets.
But when I use JMF AVtransmit2.java and AVReceive2.java I sniff only UDP packets and no RTP packets.
I am very confused. What is going on? If JMF sends over RTP (that uses UDP underneath), then why cannot packet sniffers detect it.

Hi,
I am developing a voice mail application to interface with asterisk. Here is the problem.
I am using ethereal packet sniffer to sniff the packets. When I connect two regular SIP phones and sniff , I can sniff the RTP packets.
But when I use JMF AVtransmit2.java and AVReceive2.java I sniff only UDP packets and no RTP packets.
I am very confused. What is going on? If JMF sends over RTP (that uses UDP underneath), then why cannot packet sniffers detect it.

Using JMF to create AVIs

Hello all, I am new to JMF and I was wondering if anyone could point me in the right direction of using JMF to create AVIs on the fly... I have short [ ] buffers that contain image data, and i need to convert this into an .avi file, but i will not have the buffers all at once, but rather will be passing them one at a time. So i need the avi renderer/writer to be able to handle incremental input of buffers, frame by frame.
if anyone could give me a hand or tell me where to look, i would be much obliged!
thanks so much,
ben

sheik2311 wrote:
I must do it in Applet since it should work on the web.Actually, no...if it "should work on the web", it either needs to be an applet (pain in the butt for JMF development) or a WebStart application (not a pain in the button). I'd personally recommend using a web start application to avoid all of the hassles of trying to put JMF in an applet.
Second, I'm not sure where your sample code came from, but you definately need some more robust sample code to work with...so...in the order you should play with them...
To show a video in a Swing component
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/SwingJMF.html]
To transmit audio/video
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/AVTransmit.html]
To receive audio/video
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/AVReceive.html]
To save a received video to disk
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/RTPExport.html]
To show and record video
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/JVidCap.html]

How to do video conferencing using jmf

hi guys, can anybody help me out on developing a videoconferencing using jmf.
ASAP PLZZZZZZZ.
my email id is .
[email protected]
siddhartha

Hi,
Here is the sample code for playing the movie.
public class MoviePlayer extends JFrame implements ControllerListener {
private Player player = null;
public static void main(String args[]) {
new MoviePlayer(args[0]);
public MoviePlayer(String movieFile) {
getContentPane().setLayout(new BorderLayout());
setSize(new Dimension(200, 200));
setVisible(true);
setTitle(movieFile);
loadMovie(movieFile);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
player.stop();
player.deallocate();
System.exit(1);
private void loadMovie(String movieFile) {
try {
MediaLocator ml = new MediaLocator("file:" + movieFile);
player = Manager.createPlayer(ml);
player.addControllerListener(this);
player.start();
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (NoPlayerException npe) {
npe.printStackTrace();
public synchronized void controllerUpdate(ControllerEvent ce) {
if (ce instanceof RealizeCompleteEvent) {
Component comp;
if ((comp = player.getVisualComponent()) != null)
getContentPane().add(comp, BorderLayout.CENTER);
if ((comp = player.getControlPanelComponent()) != null)
getContentPane().add(comp, BorderLayout.SOUTH);
validate();
I hope this will help you.
Thanks
Bakrudeen
Technical Support Engineer
Sun MicroSystems Inc, India

P2p video streaming using jmf (is it possible to "forward" the stream ?)

Hello
In my project a peer will start streaming captured video from the webcam to his neighbors and then his neighbors will have to display the video and forward(stream) it to their neighbors and so on . So my question is can i do this using jmf , a simple scenario will be : peer_1 streams to peeer_2 and then peer_2 to forward(stream) the video received from peer_1 to peer_3 .
I've read the jmf2_0 guide and i've seen that it's only possible to stream from a server to a client and that's about it , but i want also the client to pass the stream forward to another client ... like for example [http://img72.imageshack.us/img72/593/p2pjmf.gif|http://img72.imageshack.us/img72/593/p2pjmf.gif]
I want to know at least if this it's possible with jmf or should i start looking for another solution ? and do you have any examples of such projects or examples of forwarding the stream with jmf ....
thanks for any suggestions

_Cris_ wrote:
I want to know at least if this it's possible with jmf or should i start looking for another solution ? and do you have any examples of such projects or examples of forwarding the stream with jmf .... You can do what with JMF. Once you receive the stream, it's just a video stream. You can do anything you want with it...display it, record it, or send it as an RTP stream.

Using JMF

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