Capture a several streams with jmf?

i want to capture streams from 4 USB webcams in the same times.
it's possible with JMF? and how?
the JMStudio know just one capture device, if i link 2 webcams i capture just one stream?????
please if you have solution send it to me,
think you!!

I think you don't have problems, because you should query the JMFRegistry, and you'll obtain the list of all multimedia devices installed in your system.
Also, I suggest you a visit to Solutions section, look at "monitor.zip", there are some interesting files, regarding query of JMFRegistry. Good luck. :)

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Creative webcam live should work, most webcams will work... at least under Windows. I've 2 older creative webcams that work under Windows.
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regards,
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[http://java.sun.com/javase/technologies/desktop/media/jmf/reference/faqs/index.html#jmf2-rtsp-features]
[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/support-rtsp.html]
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Cross-posted
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_Cris_ wrote:
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Yes Mark, I do it all the time with CS2 (haven't got around to doing it in CS3). I have a few Blackmagic products so all you do when capturing via SDI is go to the capture settings and set it to capture audio as 5.1 which really means capture 6 audio streams. Obviously 2 steams would be empty when capturing a digibeta.
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Regards,
- Alex
P.S. Replies of the type "RTFM" are OK, especially if they contain info where to read, :-)
Message was edited by:
avtanski

OK thanks.
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Dear friends
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ac09 wrote:
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Play sdp file with JMF

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ANeto

Hi,
I have read all the mails on the JMF interest group regarding the Broadcaster and DSS.
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Detection problem on HP webcam with JMF

Hi,
I'm trying NyARtoolkit and I need to use the video stream of my HP's webcam encrusted above the screen of my laptop (a HP Pavillon tx 2670ef)
After the installation of JMF, I lunch JMStudio and I manage tu detect my webcam in : File->Preferences->Capture Devices->detect capture devices.
Then i close the windows and i do File->Capture...->I enable "use video device" and unable "use audio device" then i click on "OK" but aftewards i have an error message saying that JMF couldn't initialize the capture device...
2 students with me have the same pb...
I made some researches about this issue and i found this post
http://72.5.124.102/thread.jspa?messageID=10177842
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In fact, when i click on detect capture devices in JMStudio, a windows appears and i can choose "ManyCam Virtual Webcam" instead of "HP webcam".
Moreover, in the options before capturing video, the encoding is in RVB instead of YUV before with the "HP webcam".
But when i run my program i have this error :
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
     at java.util.Vector.elementAt(Unknown Source)
     at jp.nyatla.nyartoolkit.jmf.utils.JmfCaptureDeviceList.getDevice(JmfCaptureDeviceList.java:80)
     at jp.nyatla.nyartoolkit.java3d.utils.NyARSingleMarkerBehaviorHolder.<init>(NyARSingleMarkerBehaviorHolder.java:68)
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     at J3DJME.NyARJava3D.main(NyARJava3D.java:76)
I tried many other things (Quicktime with QTcap... but i didn't managed to solve this pb yet)
Coud you help to use my webcam with jmf ?
josy

You probably want to remove the crust from your web cam if you expect it to work. Most things that are encrusted aren't in the best of shape...
JMF connects to web cameras by wrapping around native interfaces. If the JMStudio isn't able to use your web cam, it could mean a number of things...your web cam isn't compliant with the version of the interfaces (VFW and DirectShow, I believe) that JMF is wrapping around, the web cam doesn't output any formats JMF can use, etc.
But if JMStudio can't use your web cam sucessfully, 99% of the time that means your web cam isn't going to work with JMF... unless you want to code support for it yourself.

Capture a several streams with jmf?

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