Program hang on quit on Mac OS X

The program run and capture images properly but hang on exit and force quit is need on Mac (with Retina display) installed with OS X Yosemite (running inside eclipse).

17:46:30.145 [main] INFO com.github.sarxos.webcam.Webcam - WebcamDefaultDriver capture driver will be used
17:46:30.151 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices
17:46:30.476 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Found device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:30.478 [main] DEBUG com.github.sarxos.webcam.Webcam - Setting new resolution 320x240
17:46:30.478 [main] WARN com.github.sarxos.webcam.Webcam - Automated deallocation on TERM signal is now enabled! Make sure to not use it in production!
17:46:30.478 [main] DEBUG com.github.sarxos.webcam.WebcamLock - Lock Webcam FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:30.488 [atomic-processor-1] INFO c.g.s.webcam.ds.cgt.WebcamOpenTask - Opening webcam FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:30.488 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Opening webcam device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:30.488 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Webcam device 0x1470000005ac8511 starting session, size java.awt.Dimension[width=320,height=240]
17:46:30.532 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Webcam device session started
17:46:30.532 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Initialize buffer
17:46:33.481 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices
17:46:34.175 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Webcam device com.github.sarxos.webcam.ds.buildin.WebcamDefaultDevice@be4535e is now open
17:46:34.175 [main] DEBUG com.github.sarxos.webcam.Webcam - Webcam is now open FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:34.176 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Found device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:34.219 [main] DEBUG c.github.sarxos.webcam.WebcamUpdater - Webcam updater has been started
17:46:34.225 [main] DEBUG com.github.sarxos.webcam.WebcamPanel - Starting panel rendering and trying to open attached webcam
17:46:37.181 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices
17:46:37.213 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Found device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:40.217 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices
17:46:40.246 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Found device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:43.247 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices
17:46:43.253 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Found device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:45.653 [shutdown-hook-1] INFO c.g.sarxos.webcam.WebcamShutdownHook - Automatic FaceTime HD Camera (Built-in) 0x1470000005ac8511 deallocation
17:46:45.653 [shutdown-hook-1] INFO com.github.sarxos.webcam.Webcam - Disposing webcam FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:45.664 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Disposing webcam device FaceTime HD Camera (Built-in) 0x1470000005ac8511
17:46:45.664 [atomic-processor-1] DEBUG c.g.s.w.d.b.WebcamDefaultDevice - Closing webcam device
17:46:46.256 [webcam-discovery-service] DEBUG c.g.s.w.d.b.WebcamDefaultDriver - Searching devices

The above is the message shown on eclipse console and hang after “Searching devices”.

[msj121]

Just for the record, simply writing the static void main as follows:

public static void main(String[] args) {    
        Webcam.getDiscoveryService().setEnabled(true);
        Webcam.getDiscoveryService().stop();
        webcam = Webcam.getDefault();
        launch(args);
        while(running){
            try {
                Thread.currentThread().sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        webcam.close();
}

Now you can use the webcam in JavaFx. My assumption is natively the main thread needs to exist, or something… I hope this is a useable workaround for some.

Of course you need to set running = false, when your JavaFX application is done with the Webcam.

[reinaldoluckman]

The only way that I could solve this was by putting a shutdown hook with a halt:

if (System.getProperty("os.name").equals("Mac OS X")) {            

    Runtime.getRuntime().addShutdownHook(new Thread() {
        @Override
        public void run() {
            camMMOPanel.stop();
            camMMO.close();
            Runtime.getRuntime().halt(0);
        }
    });            
}

If someone has a better solution, please share.

Thanks.