The following code creates a Media object that refers to the Buck Bunny movie from the JavaFX samples. I expected that it would report an audio track and a video track. In fact, it just reports an audio track.

import javafx.scene.media.Media;

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

var tracks = bind media.tracks on replace {
    for (track in tracks) {
        println("Track #{indexof track}, type: {track.getClass().getName()}");
    }
};
var media = Media {
                source: mediaURL
            };