On my Windows system, the following code demonstrates radical swings in video start-up latency. Repeated clicking of play (green) and stop (red) buttons invariably leads to a very long delay before the video plays back. Subsequent plays can nevertheless play back almost immediately. The delay in start-up is therefore not particularly predictable. This behavior was exhibited with the attached 700KB 3GP video sample.


import javafx.scene.Group;
import javafx.scene.input.MouseEvent;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.scene.paint.Color;
import javafx.scene.Scene;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

def mediaViewer: MediaView = MediaView {
    mediaPlayer: MediaPlayer {
        media: media
    }
}

def media: Media = Media {
     source: "file:///C:/development/netbeans_workspace/musicpinboardmobile/test/jirabugs/demo.3gp" // insert the attached video's URL here
}

Stage {
    width: 250
    height: 250
    scene: Scene {
        content: Group {
            content: [
                mediaViewer
                Rectangle {
                    x: 30
                    y: 140
                    width: 30
                    height: 30
                    fill: Color.RED
                    onMouseReleased: function(e:MouseEvent) {
                        mediaViewer.mediaPlayer.stop();
                        mediaViewer.mediaPlayer.media = null;
                    }
                }
                Rectangle {
                    x: 70
                    y: 140
                    width: 30
                    height: 30
                    fill: Color.GREEN
                    onMouseReleased: function(e:MouseEvent) {
                        mediaViewer.mediaPlayer.media = media;
                        mediaViewer.mediaPlayer.play();
                    }
                }
            ]
        }
    }
}