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Index › Programming Questions & Help › Video Capture,  Movie Playback,  Vision Libraries › connecting more than 3 cameras - QT error
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connecting more than 3 cameras - QT error (Read 1438 times)
rashkatan
connecting more than 3 cameras - QT error
Sep 6th, 2009, 3:27pm  
I'm using multiple iSight cameras to provide simultaneous feeds into my sketch.

I'm able to connect 3 cameras with no problem, but the 4th camera causes an error.

when I call cam.settings() there are in fact 4 feeds to choose from (so the hardware is not the problem), but on instantiating the 4th Camera object in code, I get the following error before the settings window ever opens:

quicktime.std.StdQTException[QTJava:7.6.0g],-9402=cantDoThatInCurrentMode,QT.vers:7608000
     at quicktime.std.StdQTException.checkError(StdQTException.java:38)
     at quicktime.std.sg.SequenceGrabber.idle(SequenceGrabber.java:272)
     at processing.video.Capture.run(Capture.java:355)
     at java.lang.Thread.run(Thread.java:613)
quicktime.std.StdQTException[QTJava:7.6.0g],-2014=invalidDuration,QT.vers:7608000
     at quicktime.std.StdQTException.checkError(StdQTException.java:38)
     at quicktime.std.movies.Track.insertMedia(Track.java:675)
     at processing.video.MovieMaker.finish(MovieMaker.java:325)
     at processing.video.MovieMaker.dispose(MovieMaker.java:339)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.jav
a:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at processing.core.PApplet$RegisteredMethods.handle(PApplet.java:724)
     at processing.core.PApplet$RegisteredMethods.handle(PApplet.java:717)
     at processing.core.PApplet.stop(PApplet.java:667)
     at processing.core.PApplet.die(PApplet.java:2191)
     at processing.core.PApplet.die(PApplet.java:2201)
     at processing.video.Capture.errorMessage(Capture.java:429)
     at processing.video.Capture.run(Capture.java:372)
     at java.lang.Thread.run(Thread.java:613)
quicktime.std.StdQTException[QTJava:7.6.0g],-9402=cantDoThatInCurrentMode,QT.vers:7608000
     at quicktime.std.StdQTException.checkError(StdQTException.java:38)
     at quicktime.std.sg.SequenceGrabber.stop(SequenceGrabber.java:343)
     at processing.video.Capture.stop(Capture.java:402)
     at processing.video.Capture.dispose(Capture.java:417)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.jav
a:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at processing.core.PApplet$RegisteredMethods.handle(PApplet.java:724)
     at processing.core.PApplet$RegisteredMethods.handle(PApplet.java:717)
     at processing.core.PApplet.stop(PApplet.java:667)
     at processing.core.PApplet.die(PApplet.java:2191)
     at processing.core.PApplet.die(PApplet.java:2201)
     at processing.video.Capture.errorMessage(Capture.java:429)
     at processing.video.Capture.run(Capture.java:372)
     at java.lang.Thread.run(Thread.java:613)
Exception in thread "Animation Thread" java.lang.NullPointerException
     at processing.video.Capture.settings(Capture.java:486)
     at StillsToMovie.setup(StillsToMovie.java:58)
     at processing.core.PApplet.handleDraw(PApplet.java:1403)
     at processing.core.PApplet.run(PApplet.java:1328)
     at java.lang.Thread.run(Thread.java:613)
Exception in thread "Thread-5" java.lang.RuntimeException: Error inside Capture.run()
     at processing.core.PApplet.die(PApplet.java:2192)
     at processing.core.PApplet.die(PApplet.java:2201)
     at processing.video.Capture.errorMessage(Capture.java:429)
     at processing.video.Capture.run(Capture.java:372)
     at java.lang.Thread.run(Thread.java:613)

anyone ever encounter something like this?

many thanks in advance,
ron
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Callum
Re: connecting more than 3 cameras - QT error
Reply #1 - Sep 15th, 2009, 9:12am  
I am new to processing, and I am araid I can not help, however I was wondering if you could share your code as I am trying to do a similar thing but with only 2 cameras?
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bennyJCB
Re: connecting more than 3 cameras - QT error
Reply #2 - Oct 12th, 2009, 4:21am  
Please share the camera code! I am going to connect 3 cameras to my sketch and then try 2 more with the help of a friend.

Will then share my code too!
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