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Videofeed is "twisted" (Read 715 times)
slaattnes
Videofeed is "twisted"
Oct 19th, 2006, 5:32pm  
First of all; I run processing 0118 beta, jmyron 0025, quicktime 6.5.2 with java, vinvdig 1.0.1, jdk (jre inkl.) 1.5.

* vinvdig shows live image from camera - no problems there
* qtjava.zip is present in ..\jre1.5.0_09\lib\ext\
* jmyron is present in ..\processing-0118\libraries\jmyron\
* jmyron-dlls is present in ..\system32\

Now: When I run an example like ASCII Video by B. Fry the video shows an input and everything is in order, but if I try to run any of the examples that uses "import JMyron.*;" the videofeed is "twisted".

The script is running, with feed (I can clearly see movement) but the image is vertically divided in five. Each sector shows the same feed - but only approximately 1 cm in from the right (from the lens view). Also the image have horizontal lines from top to bottom.

Em I see that this problem is kind of dificult to descibe so i have posted a print screen here: http://img227.imageshack.us/my.php?image=processingprobbt3.jpg

You can see my pen in the red circle and, as described, likewise in the four other sectors.

I have tried with two cameras:

* sony minidv model no. dcr-rv30e
* logitech quickcam messenger

For the minidv cam, preferences like auto white balance is only adjustable on the camera. I have every "auto"-option shut off. Camera was connected through firewire 400.

For the webcam every automode was off from software. Was connected through usb.

This problem only occurs when I use the jmyronlibrary.

Hehe please help someone:)
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slaattnes
Re: Videofeed is "twisted"
Reply #1 - Oct 20th, 2006, 4:01pm  
I've stumbeled over this url and that fixed the problem: http://mrl.nyu.edu/~perlin/courses/fall2006mm/using-jmyron.html

Both the dv and the quickcam needed to be called by the exact resolutions to work.

Is this a bug or maybe there should just be made a "rule" that handle autoresizing or something? Because there are only jmyron which dosn't cope with "aprox-resolutions" as far as I know.

Anyway; for those who experience an scrambled image, use println("Forced Dimensions: " + m.getForcedWidth() + " " + m.getForcedHeight()); to get a resolution that will work.

Edit 21.10: With a logitech quickcam messenger I get an image by using the forced dimensions 352, 288. But the image freezes. Why does it happend? This I figure is a cam driver/jmyron-collision. Any thoughts?
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« Last Edit: Oct 21st, 2006, 3:49am by slaattnes »  
 
nickdatz
Re: Videofeed is "twisted"
Reply #2 - Oct 26th, 2006, 5:19pm  
Just testing jmyron with logitech quickcam chat, thanks for the tip to solve twisted videofeed, it solved my problem!
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