The following code attaches a MediaTimer to a MediaPlayer. It causes an exception to be reported and the timer is ignored.

Exception in trigger:
com.sun.media.jmc.OperationUnsupportedException: The operation is not supported
        at com.sun.media.jmc.MediaProvider.addNotificationTime(MediaProvider.java:815)
        at javafx.scene.media.MediaPlayer$10.onChange(MediaPlayer.fx:375)
        at com.sun.javafx.runtime.location.SequenceVariable$4.onAction(SequenceVariable.java:219)
        at com.sun.javafx.runtime.location.SequenceVariable$4.onAction(SequenceVariable.java:216)
        at com.sun.javafx.runtime.location.DependencyIterator.action(AbstractLocation.java:503)
        at com.sun.javafx.runtime.location.DependencyIterator.action(AbstractLocation.java:491)
        at com.sun.javafx.runtime.util.Linkables.iterate(Linkables.java:82)
        at com.sun.javafx.runtime.location.AbstractLocation.iterateChildren(AbstractLocation.java:282)
        at com.sun.javafx.runtime.location.SequenceVariable.notifyListeners(SequenceVariable.java:216)
        at com.sun.javafx.runtime.location.SequenceVariable.replaceSlice(SequenceVariable.java:129)
        at com.sun.javafx.runtime.location.SequenceVariable.access$000(SequenceVariable.java:41)
        at com.sun.javafx.runtime.location.SequenceVariable$1.onReplaceSlice(SequenceVariable.java:81)
        at com.sun.javafx.runtime.sequence.SequenceMutator.replaceSlice(SequenceMutator.java:120)
        at com.sun.javafx.runtime.location.SequenceVariable.setAsSequence(SequenceVariable.java:302)
        at com.sun.javafx.runtime.location.SequenceVariable$5.apply(SequenceVariable.java:312)
        at com.sun.javafx.runtime.location.AbstractVariable.needDefault(AbstractVariable.java:151)
        at javafx.scene.media.MediaPlayer.initialize$(MediaPlayer.fx:370)
        at javafxmedia.Media7.javafx$run$(Media7.fx:27)
        at javafxmedia.Media7.javafx$run$(Media7.fx:27)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.javafx.runtime.provider.AWT_EDT_RuntimeProvider$1.run(AWT_EDT_RuntimeProvider.java:104)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)




------------------------------------------------
package javafxmedia;

import javafx.ext.swing.SwingButton;
import javafx.scene.layout.HBox;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaTimer;
import javafx.scene.media.MediaView;
import javafx.scene.Scene;
import javafx.stage.Stage;

var mediaURL = "http://sun.edgeboss.net/download/sun/media/1460825906/"
               "1460825906_2956241001_big-buck-bunny-640x360.flv";

var mediaView: MediaView;
var mediaPlayer: MediaPlayer;

Stage {
    title: "Media #7"
    resizable: false
    scene: Scene {
        width: 640
        height: 400
        content: [
            mediaView = MediaView {
                mediaPlayer:
                mediaPlayer = MediaPlayer {
                    media: Media { source: mediaURL }
                    timers: [
                        MediaTimer {
                            time: 10s
                            action: function(t) { mediaPlayer.pause() }
                        }
                    ]
                }
            }
            HBox {
                spacing: 20
                translateY: 360
                content: [
                    SwingButton {
                        text: bind if (mediaPlayer.paused)
                                   "Start" else "Stop"
                        action: function() {
                            if (mediaPlayer.paused) {
                                mediaPlayer.play();
                            } else {
                                mediaPlayer.stop();
                            }
                        }
                    }
                    SwingButton {
                        enabled: bind not mediaPlayer.paused
                        text: "Pause"
                        action: function() {
                            mediaPlayer.pause();
                        }
                    }
                ]
            }
        ]
    }
}