JavaFX和“ MediaException：未知...無法創建播放器！”

Question

好的，所以我需要編寫一個或多或少簡單的視頻播放器，為此任務選擇了JavaFX。 到現在為止，我已經編寫了一個非常簡單（應該可以正常工作）的應用程序，但是它不斷拋出相同的錯誤：

Exception in Application start method
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:875)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$147(LauncherImpl.java:157)
    at com.sun.javafx.application.LauncherImpl$$Lambda$1/1573468.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:745)
Caused by: MediaException: UNKNOWN : com.sun.media.jfxmedia.MediaException: Could not create player! : com.sun.media.jfxmedia.MediaException: Could not create player!
    at javafx.scene.media.MediaException.exceptionToMediaException(MediaException.java:146)
    at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:511)
    at javafx.scene.media.MediaPlayer.<init>(MediaPlayer.java:414)
    at player.MoviePlayer.start(MoviePlayer.java:23)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(LauncherImpl.java:821)
    at com.sun.javafx.application.LauncherImpl$$Lambda$55/17730007.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(PlatformImpl.java:323)
    at com.sun.javafx.application.PlatformImpl$$Lambda$50/11354414.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$null$164(PlatformImpl.java:292)
    at com.sun.javafx.application.PlatformImpl$$Lambda$53/4845991.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(PlatformImpl.java:291)
    at com.sun.javafx.application.PlatformImpl$$Lambda$51/26970262.run(Unknown Source)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
    at com.sun.glass.ui.gtk.GtkApplication.lambda$null$45(GtkApplication.java:126)
    at com.sun.glass.ui.gtk.GtkApplication$$Lambda$43/4959060.run(Unknown Source)
    ... 1 more
Caused by: com.sun.media.jfxmedia.MediaException: Could not create player!
    at com.sun.media.jfxmediaimpl.NativeMediaManager.getPlayer(NativeMediaManager.java:222)
    at com.sun.media.jfxmedia.MediaManager.getPlayer(MediaManager.java:104)
    at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:467)
    ... 16 more

Process finished with exit code 1

我剛剛開始使用JavaFX冒險，在這里發表文章之前，我已經閱讀了有關此問題的類似主題，並且大多數時候該問題與媒體編碼類型有關。 因此，首先，我嘗試播放Handbrake（Two-Pass .mp4）的輸出，但沒有成功。 然后，我從HERE下載了一個示例.flv文件。 它也沒有用，所以我嘗試了一個mp3文件，但問題仍然存在。 我什至嘗試在Windows和Linux上進行編譯，但沒有任何效果。

為了清楚起見，代碼如下所示：

package player;

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class MoviePlayer extends Application {

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

    @Override
    public void start(Stage stage) throws Exception {
        Group root = new Group();

        Media media = new Media("file:///home/winged/IdeaProjects/MoviePlayer/video/barsandtone.flv");
        MediaPlayer player = new MediaPlayer(media);
        MediaView view = new MediaView(player);

        player.setAutoPlay(true);

        root.getChildren().add(view);
        Scene scene = new Scene(root, 400, 400, Color.BLACK);
        stage.setScene(scene);
        stage.show();

        player.play();
    }
}

Answer 1

好的，最后我找到了問題的原因-我通過視頻路徑文件的方式是錯誤的：

而不是使用Media media = new Media("file:///home/winged/IdeaProjects/MoviePlayer/video/barsandtone.flv");

我應該使用Media media = new Media(new File("file:///home/winged/IdeaProjects/MoviePlayer/video/barsandtone.flv").toURI().toString());