Hi,

I have been trying to capture webcam images in processing. It seems though, that QTJava isn't installed properly (I am working on a Windows machine). I have tried to uninstall the JavaRuntimeEnvironment, Quicktime and VDIG completely, and then installed a new version JRE (jre1.6.0_03). After that I installed Quicktime (version 7.2) and VDIG (1.0). I see QTJava.zip is installed in the jre1.6.0_03/lib/ext/ folder.

I see an older folder jre1.6.0_02 is also installed, but it is completely empty except a lib folder, which is empty too.

QTCap gets an image from the cam.

When I just try the following simple code to check available cams I get an error.

Code:

import processing.video.*;  
 
Capture myCapture;

void setup() {  
 size(640, 480);
 println(Capture.list());  
}

Error:

java.lang.NoClassDefFoundError: quicktime/std/StdQTException
at Temporary_311_5452.setup(Temporary_311_5452.java:8)

(It looks like no QT class is recognized by java?)

I have searched around the net and the forums here, but I couldn't get a working way anywhere. I'd be happy if someone can give me any help here.

Hi,

Thanks for your help.

When i do the command prompt it finds the QTJava.zip in the c:\Program Files\Java\jre1.6.0_03\lib\ext\ directory.

What I found out is that no custom install is possible anymore with this quicktime installer, but it does install QTJava.zip. It should be, if java is installed, and that is the case here. Maybe Java doesn't link to the QT classes?

Installing quicktime again: Have tried it already... No succes...

Thank you for the quick update! It works

For future reference I will post following mail I had with Apple Developer Connection regarding custom installation for Quicktime 7.2 which isn't required anymore:

=========================================================
Re: QuickTime for Java

Hello Jeroen,

Thank you for contacting the Apple Developer Connection regarding QuickTime for Java. Please know that QuickTime 7 does not require a custom install, QuickTime for Java is now installed by default, however you will first need to have JDK installed (the Microsoft JRE is not sufficient). If you have installed Java after installing QuickTime, you must install QuickTime again. I hope you find this information useful. Please do not hesitate to contact us again should you have any further problems or queries.

Best regards,

Luke Hoctor
Apple Developer Connection

Worldwide Developer Relations Inquiry from Jeroen regarding Software Downloads

Hi,

I want to do a quicktime installation which I can customize, so I can install QTJava. At your site I find the following text:

"In order to install QuickTime for Java, developers will need to select QuickTime for Java in the Custom install option. The installers can be found at the following location:"  

The problem is, the installer just doesn't give me the option to select a custom installation. It just installs... My version of the installer is: 7.2.0.240. Can you please help me?

Regards, Jeroen
=========================================================

Well, it is still stated on the QTJAVA site too. That's where I got confused.

spare the all caps stuff, that's not how java.library.path works. if you can't get it to work with eclipse, post in the integration section.

I did what hype1 did, and still can't get it to work.