After embedding a video inside a standalone Java Swing application with JavaFX media. I found that three different threads (AWT-Queue, JavaFX application thread and QuantumRenderer) are being calling the repaint routine on the JFXPanel causing the application to hang. I have solved this problem by validating when the repaint method is called from AWT and QuantumRenderer, and queuing it into the JavaFX thread.

Here is the snipped:

    @Override
    public void repaint(final long tm,
            final int x,
            final int y,
            final int width,
            final int height) {
        log.log(Level.INFO,"repaint(long, int, int, int, int)");
        if(Platform.isFxApplicationThread()) {
            super.repaint(tm, x, y, width, height);
        } else {
            Platform.runLater(new Runnable() {
                
                @Override
                public void run() {
                    JFXVideoPanel.super.repaint(tm, x, y, width, height);
                }
            });
        }
    }