Capturing two cameras using JMF

Hi,
I am trying to capture media from two Logitech USB cameras, but I am not able to do so. Detect Capture Devices lists only one camera.
Please let me know how can I get around with this problem.
- t_k_m

This is a known bug.... JMF sometimes doesn't detect the 2nd / multiple cameras. No easy workarounds.... The bug has been open since 2003, but there's no development or bug fixing on JMF anymore.
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4890873
regards,
Owen

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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.

Controlling two cameras using LabVIEW

Hi,
I am a research assistant and my task is to control two cameras using LabVIEW. Also I need to store the pics automatically in a file having the exact time for each pic when taken. I am still new to this kind of work but I am trying my best to learn. I am using some icon for saving pictures but they were stored as RSC format. You can take a look at what I've done so far. I really appreciate if someone can help me with that. Thank you
Regards,
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Attachments:
Controling two camera.vi ‏85 KB

Hi try this VI... I have made very little modification in that... What type of camera you are using.. what is the interface?....
The best solution is the one you find it by yourself
Attachments:
Controling two camera.vi ‏84 KB

Is it possible to tether/capture two cameras in to Lightroom during the same session?

I would like to tether two cameras into one system using lightroom. Will Lightroom support two cameras at the same time?

Not sure whether simultaneous capture would be necessary but here's a suggestion - which could meet your requirements - as opposed to a tested possibility. I've not tried this and have no knowledge of Mac environments! If you can run LR and another programme (e.g. EOS Utility) simultaneously or connect the second camera directly the files from the second could be imported via the watched folder in LR. I would expect the 'outside LR' files to be imported when tethering has ceased. (Using two screens one for each capture would help.) If this is worth a try let us know how you get on.

Problem in inbuilt Web-camera using JMF

Hi,
I am using JavaTM Media Framework 2.1.1e downloaded from below link in my application.
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-java-client-419417.html#7372-jmf-2.1.1e-oth-JPR .
Main functionality of my app is to use Web-camera.
My application is working fine on Windows XP and Windows 7 using external Web-Cam device.
However, the same application is giving problem in accessing in-built Webcam on Windows 7.
I tried to access in-built Web-Camera from JMStudio app(of JMF..File->Capture->check 'Use video device'-> Press 'Ok'), however JMStudio itself is not able to access in-built web-camera. Always I am getting the error 'Couldn't initialize the Capture Device!'.
Please note that JMF Registry Editor(JMStudio->Preferences->Capture Device->Detect Capture Devices')is able to detect the inbuilt web-cam device.
Is this the issue in JMF itself or I can resolve the issue from my application also?
Also, when I tried to do online JMF diagnostics, I am getting below error.
Online JMFDiagnostics URL: http://www.oracle.com/technetwork/java/javase/jmfdiagnostics-139189.html
Java Plug-in 1.6.0_26
Using JRE version 1.6.0_26-b03 Java HotSpot(TM) Client VM
User home directory = C:\Users\taipakai
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
java.lang.ClassFormatError: Incompatible magic value 1008813135 in class file JMFDiagnostics
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.ClassFormatError: Incompatible magic value 1008813135 in class file JMFDiagnostics
Please suggest.
Thanks for your help in advance.
Yogesh

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.

How can i open two chanel use JMF?

i want have a capture card. if have four chanel.
how can i open four camera in the same time?
does JavaTV can do that?

When you are in one app, press the home button and open another app. You can't see more than one app at a time, but you can have as many open as memory will allow.
To quickly switch between the apps, double-click the home button. Active apps will be shown in the order you last used them. You can slide the active bar to see more of recent apps.

Synchronization of multiple clips from two cameras using TIMECODE

Hi there and greetings everyone,
I'm new to the adobe forum, but I'm quite familiar with premiere pro and generally with filming and editing.
My question is simple, yet complicated:
I have 2x 5D mark III synched via timecode to the second and I have an event of about 30 minutes, where each camera recorded individual clips in an alternating way (so there are gaps between clips from the same camera, but almost 100% coverage with the 2 cameras together - we used this method for a more creative / interesting end result)
HOW DO I import the clips from the 2 cameras in such a way that there will be two different video tracks (so for exemple track 1 for cam 1 and track 2 for cam 2) yet I will be able to sync them via timecode in my timeline ?
Aditional info:
- the only thing I managed was to select all the clips, create a multi-camera sequence and open that in a timeline format (everything is synced up, but each individual clip is on a different track, so I have 61 video layers basically instead of 2)
I've asked lots of people, red tens of topics, watched lots of tutorial videos, none seemed to answare my question
- I know there is the Multi Camera Monitor, but that option is designe for editing and synching clips when there is 1 long clip / camera, and where you actually watch the entire recording and do the editing real time, which is not my case.
- Some sugested me to use plural eyes, but I don't see any point in using andio based synchronization if I have excelent timecode.
- I also need it done the way I described because for me it;s more manageble that way, I can edit it faster, and I already know what to look for, so it;s again nonesence to use the multicam feature.
The bottom line is that I am looking for something similar to pluraleyes (when you import everything in one timeline) and use the audio info to sync it, but in this case I would use the embeded timecode.
I've red a post where someone mentioned that in other editors its just select all / sync / done, so I can't believe it;s that complicated in Premiere.

There are currently better sync features in the works!
I know your frustration. For a similar and more in-depth discussion, see another thread I posted in here: Batch syncing audio and video using timecode
Unfortunately in CS6 (what I currently use) it creates a separate track for each clip, which can be a mess if you have hundreds of clips. The best way I have found to make things easier is to create a separate TC synced multi-cam sequence for each individual cameras footage. For example, I follow the same steps you did for each of my cameras footage independently so that I have a TC synced sequence for camera A, a TC sequence for camera B, etc. Then you can select all the footage of each sequence, nest it, and copy each nest into a master sequence to work with. What you end up with is a single clip for each camera. MUCH easier to work with! To keep track of where clips start and/or end in the nested sequences you can go into your original sequence and place a marker (shortcut "M") at each clip. These markers then show up in your Mastertimeline clips for reference.
I know things could be easier, but this is currently the best option I know of. I already put in a feature request and was told by the Engineering Manager of Premiere Pro that new sync features were in the works. (see thread link above)
Hope that helps!
...and for the record, here is my TC sync process:
SELECT ALL clips you wish to sync from your Project Tab/Window.
RIGHT-CLICK and SELECT "Create Multi-camera Source Sequence..." In CS6 it is the next-to-last option in your popup window.
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RIGHT-CLICKyour new multi-cam sequence and SELECT "Open in Timeline"

Streaming Video from a serial camera using JMF

Hello, I have problems implementing video streaming with a serial camera.
The data for a frame of the camera is like an array of RGB integer values starting from the first pixel until the last. I've implement the code to get the values and store in an integer array.
how to generate video from the data i get?

Hi,
If you really want to do it yourself using TCP/IP you will have to read the standard : http://www.machinevisiononline.org/vision-standards-details.cfm?type=5
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More doc :
Acquiring from GigE Vision Cameras with Vision Acquisition Software - Part I
Acquiring from GigE Vision Cameras with Vision Acquisition Software - Part II
Hope this helps
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"

How to detect and capture most number of cameras by JMF?

i make a program that detect camera and display video captured from it using JMF
but the problem is that some camera s cant be detected
what do u think where is the problem ?
and what about jmf detection ? is it efficient with all camers or even most types ?
thanks in advance

i changed my code to detect all what i know of video formats
but still cant detect some cameras (webcams)
is JMF the reason ? or still my code need some additions
really need ur opinions
and this is my code
boolean fetchDeviceFormats(){
Vector deviceList = CaptureDeviceManager.getDeviceList(new VideoFormat(null));
          CaptureDeviceInfo CapDevice = null;
          Format CapFormat = null;
          String type = "N/A";
          CaptureDeviceInfo deviceInfo=null;
boolean VideoFormatMatch=false;
          for(int i=0;i<deviceList.size();i++){
               // search for video device
               deviceInfo = (CaptureDeviceInfo)deviceList.elementAt(i);
               if(deviceInfo.getName().indexOf("vfw:")<0)continue;
               Format deviceFormat[] = deviceInfo.getFormats();
               for (int f=0;f<deviceFormat.length;f++){
                    if(deviceFormat[f] instanceof RGBFormat)type="RGB";
                    if(deviceFormat[f] instanceof YUVFormat)type="YUV";
                    if(deviceFormat[f] instanceof JPEGFormat)type="JPG";
                    Dimension size = ((VideoFormat)deviceFormat[f]).getSize();
                    camImgSize.addElement(type+" "+ size.width+"x" +size.height);
                    CapDevice = deviceInfo;
                    camCapDevice.addElement(CapDevice);
                    System.out.println("Video device = " + deviceInfo.getName());
                    CapFormat = (VideoFormat)deviceFormat[f];
                    camCapFormat.addElement(CapFormat);
                    System.out.println("Video format = " + deviceFormat[f].toString());
                    VideoFormatMatch=true;     // at least one
          if(VideoFormatMatch==false){
               if(deviceInfo!=null)System.out.println(deviceInfo);
               System.out.println("Video Format not found");
               return false;
          return true;
thanks in advance

Jmf streaming from ip camera using rtsp

hello everybody
i'm trying to create a player that reads rtsp video from an ip camera using jmf , and i'm facing problems doing this.
- Using a processor i have this erreor:
Received event javax.media.TransitionEvent[source=com.sun.media.processor.rtsp.Handler@f47396,previous=Unrealized,current=Configuring,target=Configured]
Exception in thread "JMF thread: com.sun.media.processor.rtsp.Handler@f47396[ com.sun.media.processor.rtsp.Handler@f47396 ] ( configureThread)" java.lang.NullPointerException
     at com.sun.media.processor.rtsp.Handler.closeSessions(Handler.java:266)
     at com.sun.media.processor.rtsp.Handler.doFailedConfigure(Handler.java:259)
     at com.sun.media.ConfigureWorkThread.failed(BasicController.java:1382)
     at com.sun.media.StateTransitionWorkThread.run(BasicController.java:1346)
- And Using a Player without medialocator:
javax.media.ResourceUnavailableEvent[source=com.sun.media.content.rtsp.Handler@1a116c9,message=Failed to realize: Message from RTSP Server - Not found]
- And Using a Player with medialocator:
Received event javax.media.TransitionEvent[source=com.sun.media.content.rtsp.Handler@1e2ca7,previous=Unrealized,current=Realizing,target=Started]
bandwidth info: AS:0
bandwidth info: AS:13
Exception in thread "JMF thread: com.sun.media.content.rtsp.Handler@1e2ca7[ com.sun.media.content.rtsp.Handler@1e2ca7 ] ( realizeThread)" java.lang.NumberFormatException: empty String
     at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
     at java.lang.Double.valueOf(Unknown Source)
     at java.lang.Double.<init>(Unknown Source)
     at com.sun.media.content.rtsp.RtspUtil.setDuration(RtspUtil.java:521)
     at com.sun.media.content.rtsp.RtspUtil.rtspSetup(RtspUtil.java:168)
     at com.sun.media.content.rtsp.Handler.initRtspSession(Handler.java:117)
     at com.sun.media.content.rtsp.Handler.doRealize(Handler.java:84)
     at com.sun.media.RealizeWorkThread.process(BasicController.java:1400)
     at com.sun.media.StateTransitionWorkThread.run(BasicController.java:1339)
Please help,
Edited by: 865261 on 11 juin 2011 10:15

865261 wrote:
but for rtsp i really have no idea how to do it. so please if you have a link or a first step to do it.I don't have any clue how you'd go about doing that. I'd recommend you read my response on the other thread before you worry about it, and I'd also recommend not posting 2 threads about the same issue in the future.

What is thecode to open webcam using JMF

hi, i am doing a project where i need to use web cam using JMF in the JPanel and also have to track the mouse event(e.g the mouse coordination) please help me with the code that opens a web cam in the pannel.

Hi,
Take a look to opendocument function.
Regards

Fast acquring of images using JMF

Hello!
I have been trying to write a class for reading frames from a video camera using JMF, however the BufferToImage.createImage appeared to be very slow -- the code is fast if the method is commented out. How can I get the images faster? Or perhaps read pixels directly from the video stream buffer? Or is there another problem with the code? If BufferToImage was constructed using Buffer.getFormat, it was also slow.
I attach the code that I have used for reading the frames.
Sincerely,
Artur Rataj
* A video input driver that uses Java Media Framework.
* This file is provided under the terms of the GNU General Public License.
* version 0.1, date 2004-07-21, author Artur Rataj
package video.drivers;
import java.io.*;
import java.awt.*;
import java.awt.image.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.control.*;
import javax.media.format.*;
import javax.media.util.BufferToImage;
* This is a video driver that uses Java Media Framework to access video input devices.
public class JMFDriver extends VideoDriver implements ControllerListener {
      * The input stream processor.
     Processor processor;
      * The stream from the input video device.
     PushBufferStream frameStream;
      * A converter from stream data to an image.
     BufferToImage frameStreamConverter;
      * A video stream buffer.
     Buffer videoBuffer;
      * Constructs a new driver.
     public JMFDriver(String deviceAddress, int width, int height, int bitsPerPixel)
          throws VideoDriverException {
          super(deviceAddress, width, height, bitsPerPixel);
          MediaLocator locator = new MediaLocator(deviceAddress);
          if(locator == null)
               throw new VideoDriverException("Device not found: " + deviceAddress);
          javax.media.protocol.DataSource source;
          try {
               source = javax.media.Manager.createDataSource(locator);
          } catch(IOException e) {
               throw new VideoDriverException("Could not read device " + deviceAddress +
                    ": " + e.toString());
          } catch(NoDataSourceException e) {
               throw new VideoDriverException("Could not read device " + deviceAddress +
                    ": " + e.toString());
          if(!( source instanceof CaptureDevice ))
               throw new VideoDriverException("The device " + deviceAddress +
                    " not recognized as a video input one.");
          FormatControl[] formatControls =
               ((CaptureDevice)source).getFormatControls();
          if(formatControls == null || formatControls.length == 0)
               throw new VideoDriverException("Could not set the format of images from " +
                    deviceAddress + ".");
          VideoFormat videoFormat = null;
searchFormat:
          for(int i = 0; i < formatControls.length; ++i) {
               FormatControl c = formatControls;
               Format[] formats = c.getSupportedFormats();
               for(int j = 0; j < formats.length; ++j)
                    if(formats[j] instanceof VideoFormat) {
                         VideoFormat f = (VideoFormat)formats[j];
                         if(f.getSize().getWidth() == this.width &&
                              f.getSize().getHeight() == this.height) {
                              int bpp = -1;
                              if(f instanceof RGBFormat)
                                   bpp = ((RGBFormat)f).getBitsPerPixel();
                              else if(f instanceof YUVFormat) {
                                   YUVFormat yuv = (YUVFormat)f;
                                   bpp = (yuv.getStrideY() + yuv.getStrideUV())*8/
                                             this.width;
                              if(bpp == bitsPerPixel) {
                                   videoFormat = (VideoFormat)c.setFormat(f);
                                   break searchFormat;
          if(videoFormat == null)
               throw new VideoDriverException("Could not find the format of images from " +
                    deviceAddress + " at " + bitsPerPixel + " bits per pixel.");
          try {
               source.connect();
          } catch(IOException e) {
               throw new VideoDriverException("Could not connect to the device " +
                    deviceAddress + ": " + e.toString());
          try {
               processor = Manager.createProcessor(source);
          } catch(IOException e) {
               throw new VideoDriverException("Could not initialize the processing " +
                    "of images from " + deviceAddress + ": " + e.toString());
          } catch(NoProcessorException e) {
               throw new VideoDriverException("Could not initialize the processing " +
                    "of images from " + deviceAddress + ": " + e.toString());
          processor.addControllerListener(this);
          synchronized(this) {
               processor.realize();
               try {
                    wait();
               } catch(InterruptedException e) {
                    throw new VideoDriverException("Could not initialize the processing " +
                         "of images from " + deviceAddress + ": " + e.toString());
          processor.start();
          PushBufferDataSource frameSource = null;
          try {
               frameSource = (PushBufferDataSource)processor.getDataOutput();
          } catch(NotRealizedError e) {
               /* empty */
          PushBufferStream[] frameStreams = frameSource.getStreams();
          for(int i = 0; i < frameStreams.length; ++i)
               if(frameStreams[i].getFormat() instanceof VideoFormat) {
                    frameStream = frameStreams[i];
                    break;
          videoBuffer = new Buffer();
          videoBuffer.setTimeStamp(0);
          videoBuffer.setFlags(videoBuffer.getFlags() |
               Buffer.FLAG_NO_WAIT |
               Buffer.FLAG_NO_DROP |
               Buffer.FLAG_NO_SYNC);
          processor.prefetch();
     public void controllerUpdate(ControllerEvent event) {
          if(event instanceof RealizeCompleteEvent)
               synchronized(this) {
                    notifyAll();
     * Acquires an image from the input video device.
     public Image acquireImage() throws VideoDriverException {
          try {
               frameStream.read(videoBuffer);
          } catch(IOException e) {
               throw new VideoDriverException("Could not acquire a video frame: " +
                    e.toString());
          frameStreamConverter = new BufferToImage(
               (VideoFormat)frameStream.getFormat());
          Image out = frameStreamConverter.createImage(videoBuffer);
          return out;
     * Closes the input video device.
     public void close() {
          processor.close();
     public static void main(String[] args) throws Exception {
          JMFDriver driver = new JMFDriver("v4l://0", 768, 576, 16);
          while(true)
               Image image = driver.acquireImage();
               System.out.print(".");
               System.out.flush();

This is how you do this:
First you must know upfront what type of a format your camera is using,
all the valid formats are static members of BufferedImage.
Next you need to create a BufferedImage of the same format.
Here is an example:
My creative webcam is set to: 640x480 RGB 24bit color. i Create a BufferedImage into which i will copy the buffer:
BufferedImage buff = new BufferedImage(640,480,BufferedImage.TYPE_3BYTE_BGR);
Next the copy operation where appropriate
cbuffer is my javax.media.Buffer from which i will copy the image data:
System.arraycopy((byte[])cbuffer.getData(), 0, ((DataBufferByte) buff.getRaster().getDataBuffer()).getData(),0,img_size_bytes);
Things to note here, are i cast the cbuffer.getData() to byte[] because that is the type of data this is. I cast buff.getRaster().getDataBuffer() to DataBufferByte because the bufferedimage is of type TYPE_3BYTE_BGR.
also, img_size_bytes equals to 640*480*3
This operation will copy the raw buffer into your buffered image avoiding the use of BufferToImage
Only problem is the image will be flipped, but just flip the webcam to correct this =)

How to use JMF capture two webcam?

I want to use two camera in the same time. Can I do this? If JMF can't do it please suggest me how to do this.

There is a thread in this forum about your question.
Time to search! :)

How can i use JMF capture two vedio

i can use JMF capture one vedio
but my capture card have four chanel
i need view two or more vedio in one frame

If you mean iTunes Store accounts, there's really nothing for you to do. Just add the tracks to the iTunes library and play them. Music purchased prior to late-2009 will been to be authorized, though. Pull down Store > Authorize... and type the credentials of the Apple ID used to buy the tracks.
If you mean something else, please describe in more detail.

Capture an image using the web camera from a web application

Hi All,
Could anyone please share the steps what have to be followed for capture an image using the web camera from a web application.
I have a similar requirement like this,
1) Detect the Webcam on the users machine from the web application.(To be more clear when the user clicks on 'Add Photo' tool from the web application)
2) When the user confirms to save, save the Image in users machine at some temporary location with some unique file name.
3) Upload the Image to the server from the temporary location.
Please share the details like, what can be used and how it can be used etc...
Thanks,
Suman

1) Detect the Webcam on the users machine from the web application.(To be more clear when the user clicks on 'Add Photo' tool from the web application)There's not really any good way to do this with JMF. You'd have to somehow create a JMF web-start application that will install the native JMF binaries, and then kick off the capture device scanning code from the application, and then scan through the list of devices found to get the MediaLocator of the web cam.
2) When the user confirms to save, save the Image in users machine at some temporary location with some unique file name.You'd probably be displaying a "preview" window and then you'd just want to capture the image. There are a handful of ways you could capture the image, but it really depends on your situation.
3) Upload the Image to the server from the temporary location.You can find out how to do this on google.
All things told, this application is probably more suited to be a FMJ (Freedom for Media in Java) application than a JMF application. JMF relies on native code to capture from the web cams, whereas FMJ does not.
Alternately, you might want to look into Adobe Flex for this particular application.

Capturing two cameras using JMF

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