Automate Video Snapshots

Question

How can I use Java to automate video snapshots?

Below is my attempt. Unfortunately, the seek command seems does not work since the color of the pixel at [100,100] remains still the same no matter where the video is.

What would I need is an app that would create snapshots of video (preferably without the need of GUI).

import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.scene.SnapshotParameters;
import javafx.scene.image.WritableImage;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.util.Duration;

public class VideoController extends Application {
private MediaPlayer media;
int posun = 100; // milisecs
int pocatek = 0; // milisecs
Duration cas = new Duration(0);

@Override
public void start(Stage scene) throws Exception {
    String uri = "http://download.oracle.com/otndocs/products/javafx/arth_512.flv";
    final Media medium = new Media(uri);
    media = new MediaPlayer(medium);
    final MediaView video = new MediaView(media);
    // videoPane.getChildren().add(video);
    media.setOnReady(new Runnable() {

        @Override
        public void run() {
            media.play();
            for (int i = pocatek; i < (int) medium.getDuration().toMillis(); i += posun) {
                System.out.println(i);
                cas = new Duration(i);
                media.seek(cas);

                WritableImage wi = new WritableImage(1000, 1000);
                video.snapshot(new SnapshotParameters(), wi);

                Color c = wi.getPixelReader().getColor(100, 100);
                System.out.println(c);
                // video.snapshot(params, image);
            }
        }
    });
}

    public static void main(String[] args) {
    launch();
    }
}

OUTPUT:

0
0xffffffff
...
640000
0xffffffff
...
670000
0xffffffff

Answer 1

There is not recommended to use JAVAFX for this task. Much better solution is to use XUGGLER. The exact case is described in this tutorial:

http://www.javacodegeeks.com/2011/02/xuggler-tutorial-frames-capture-video.html