Субтитры JavaFX

Как вариант использовать маркеры:

@Override
public void start(Stage primaryStage) {
    final Label markerText = new Label();
    StackPane.setAlignment(markerText, Pos.TOP_CENTER);
    String workingDir = System.getProperty("user.dir");
    final File f = new File(workingDir, "../media/omgrobots.flv");
    final Media m = new Media(f.toURI().toString());
    final ObservableMap<String, Duration> markers = m.getMarkers();
    markers.put("Robot Finds Wall", Duration.millis(3100));
    markers.put("Then Finds the Green Line", Duration.millis(5600));
    markers.put("Robot Grabs Sled", Duration.millis(8000));
    markers.put("And Heads for Home", Duration.millis(11500));
    final MediaPlayer mp = new MediaPlayer(m);
    mp.setOnMarker(new EventHandler<MediaMarkerEvent>() {
      @Override
      public void handle(final MediaMarkerEvent event) {
        Platform.runLater(new Runnable() {
          @Override public void run() {
            markerText.setText(event.getMarker().getKey());
          }
        });
      }
    });
    final MediaView mv = new MediaView(mp);
    final StackPane root = new StackPane();
    root.getChildren().addAll(mv, markerText);
    root.setOnMouseClicked(new EventHandler<MouseEvent>() {
      @Override
      public void handle(MouseEvent event) {
        mp.seek(Duration.ZERO);
        markerText.setText("");
      }
    });
    final Scene scene = new Scene(root, 960, 540);
    final URL stylesheet = getClass().getResource("media.css");
    scene.getStylesheets().add(stylesheet.toString());
    primaryStage.setScene(scene);
    primaryStage.setTitle("Video Player 2");
    primaryStage.show();
    mp.play();
}