如何在javafx中将视频拉伸设置为父大小

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.stage.Stage;

public class VideoPlayer extends Application {

    private static final String VIDEO_URL = "path/to/video.mp4";

    @Override
    public void start(Stage primaryStage) {
        // 创建MediaPlayer并加载视频文件
        Media media = new Media(VIDEO_URL);
        MediaPlayer mediaPlayer = new MediaPlayer(media);

        // 创建MediaView并绑定到MediaPlayer
        MediaView mediaView = new MediaView(mediaPlayer);

        // 创建父容器
        StackPane root = new StackPane();
        root.getChildren().add(mediaView);

        // 设置父容器的大小
        root.setPrefSize(800, 600);

        // 将MediaPlayer的fitWidth和fitHeight属性设置为父容器的宽度和高度
        mediaPlayer.fitWidthProperty().bind(root.widthProperty());
        mediaPlayer.fitHeightProperty().bind(root.heightProperty());

        // 创建场景并显示
        Scene scene = new Scene(root);
        primaryStage.setScene(scene);
        primaryStage.show();

        // 播放视频
        mediaPlayer.play();
    }

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