Video library not found in Eclipse? [using proclipsing]

redraw

Video library not found in Eclipse? [using proclipsing]

in Integration and Hardware • 29 days ago

I've been testing processing sketches in Eclipse with success. However I had trouble with video library. I checked it is included in the build path. Proclipsing do it automatically. Here's an screen.

http://prntscr.com/1sc9cn

Exception in thread "Animation Thread" java.lang.NoClassDefFoundError: com/sun/jna/Platform
at processing.video.LibraryPath.get(Unknown Source)
at processing.video.Video.buildWindowsPaths(Unknown Source)
at processing.video.Video.initImpl(Unknown Source)
at processing.video.Video.init(Unknown Source)
at processing.video.Capture.list(Unknown Source)
at processing.video.Capture.list(Unknown Source)
at processing.video.Capture.<init>(Unknown Source)
at dotvideo.DotVideo.setup(DotVideo.java:20)
at processing.core.PApplet.handleDraw(PApplet.java:2280)
at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:243)
at processing.core.PApplet.run(PApplet.java:2176)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.sun.jna.Platform
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 12 more

Replies(10)

PhiLho

Re: Video library not found in Eclipse? [using proclipsing]

29 days ago

Have you added the native libraries as well?

PhiLho

Re: Video library not found in Eclipse? [using proclipsing]

29 days ago

" NoClassDefFoundError: com/sun/jna/Platform"
The packages com.sun have been removed from Java 7. Perhaps that's why Processing is still shipped with Java 6...

andres

Re: Video library not found in Eclipse? [using proclipsing]

29 days ago

You'd need to add the following system variables:

gstreamer.library.path = absolute path to the main dlls

gstreamer.plugin.path = absolute path to the plugin dlls

for gstreamer to be able to find the native libs (having the gstreamer-java jar in the class path is not enough). In Eclipse, you can add these variables in the "VM Arguments" section in the "Run Configurations" option of the project, for example:

-Dgstreamer.library.path=C:/blah/blah/gstreamer -Dgstreamer.plugin.path=C:/blah/blah/gstreamer/plugins

I tried this in a simple Eclipse project using the video library, but haven't tested with proclipsing.

redraw

Re: Video library not found in Eclipse? [using proclipsing]

28 days ago

thanks

not yet.

screen... http://i.imgur.com/HkRZ9dn.png

added this in VM arguments,

-Dgstreamer.library.path=D:\arbol\programas\opensource\processing-2.0.2\modes\java\libraries\video\library\windows32

-Dgstreamer.plugin.path=D:\arbol\programas\opensource\processing-2.0.2\modes\java\libraries\video\library\windows32\plugins

should I add Java 6 libraries to the project?

PhiLho

Re: Video library not found in Eclipse? [using proclipsing]

28 days ago

No, use Java 6 to run the project, instead.

redraw

Re: Video library not found in Eclipse? [using proclipsing]

28 days ago

didn't work..

I downloaded Jre6 update 64 for win32. Installed it. Added it to JRE libraries, and use jre6 as default. Delete previous project, and make a new one exactly the same, but now eclipse including jre6 libraries.

PhiLho

Re: Video library not found in Eclipse? [using proclipsing]

28 days ago

Have you changed the project to use Java level 1.6 to compile the code? If you compile for Java 7 and run with Java 6, it cannot work.

redraw

Re: Video library not found in Eclipse? [using proclipsing]

28 days ago

Did it now. Same problem :/

http://prntscr.com/1slyph

Here's the Test.java code just in case (example of "Capture" from processing.org adapted to use in Eclipse)

package dotvideo;
import processing.core.PApplet;
import processing.video.*;
public class Test extends PApplet {
Capture cam;
public void setup() {
size(640, 480);
String[] cameras = Capture.list();
if (cameras.length == 0) {
println("There are no cameras available for capture.");
exit();
} else {
println("Available cameras:");
for (int i = 0; i < cameras.length; i++) {
println(cameras[i]);
}
// The camera can be initialized directly using an
// element from the array returned by list():
cam = new Capture(this, cameras[0]);
cam.start();
}
}
public void draw() {
if (cam.available() == true) {
cam.read();
}
image(cam, 0, 0);
}
public static void main(String _args[]) {
PApplet.main(new String[] { dotvideo.Test.class.getName() });
}
}

redraw

Re: Video library not found in Eclipse? [using proclipsing]

28 days ago

Ok, "jna.jar" was missing. Proclipsing didn't include it. I made a copy of it to lib folder in my project, and added it in the Build Path.

Now it throws me another error. http://prntscr.com/1smh9j

Exception in thread "Animation Thread" java.lang.UnsatisfiedLinkError: can't load library gio-2.0 (gio-2.0|libgio-2.0|libgio-2.0-0) with -Djna.library.path=D:/arbol/documentos/Processing/code/%5eeclipse/TestVideo/lib/base/video/. Last error:java.lang.UnsatisfiedLinkError: Unable to load library 'gio-2.0': No se puede encontrar el módulo especificado.

at processing.video.LibraryLoader.loadLibrary(Unknown Source)

at processing.video.LibraryLoader.load(Unknown Source)

at processing.video.LibraryLoader.preLoadLibs(Unknown Source)

at processing.video.LibraryLoader.getInstance(Unknown Source)

...

(continues)

PhiLho

Re: Video library not found in Eclipse? [using proclipsing]

27 days ago

I see a jna.jar jar in the video/library folder, and it doesn't seem add to your project. I think it is necessary for the Java library to load the DLLs.

[EDIT] Ah, I see you found out that by yourself! Sorry.
About the GIO library (looks like it comes with the glib, the Gnome library), I have no idea. Perhaps andres can give an advice.

[EDIT again] The libgio DLL (and the glib one), is in the same folder than the other, perhaps you need to add the jna.library.path as well to your command line, so it points there instead of to the path to your sketch.

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