Debian Jessie JavaFX MediaPlayer：無法創建播放器

Question

使用Ant配置運行Java應用程序時出現此異常。

Exception in thread "JavaFX Application Thread" MediaException: UNKNOWN : com.sun.media.jfxmedia.MediaException: Could not create player! : com.sun.media.jfxmedia.MediaException: Could not create player!

這是我的代碼：

@Override public void start(Stage stage) {
    final Scene scene = new Scene(((Viewer)viewer).getPanel());
    Media theme = new Media(getHostServices().getDocumentBase() + "src/sound/theme_bttf.mp3");
    new MediaPlayer(theme).play();
}

有人對如何解決這個問題有想法嗎？

我使用Gnome 3.14.1和Java在Debian Jessie 64bits上運行它：

java version "1.8.0_74"
Java(TM) SE Runtime Environment (build 1.8.0_74-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)

編輯：

這是我在執行ant run時得到的堆棧跟蹤：

run:
 [echo] ================ Run Object Main ================
 [java] Gtk-Message: Failed to load module "canberra-gtk-module"
 [java] Exception in Application start method
 [java] java.lang.reflect.InvocationTargetException
 [java]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 [java]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 [java]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 [java]     at java.lang.reflect.Method.invoke(Method.java:498)
 [java]     at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
 [java]     at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
 [java]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 [java]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 [java]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 [java]     at java.lang.reflect.Method.invoke(Method.java:498)
 [java]     at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
 [java] Caused by: java.lang.RuntimeException: Exception in Application start method
 [java]     at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
 [java]     at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
 [java]     at java.lang.Thread.run(Thread.java:745)
 [java] Caused by: MediaException: UNKNOWN : com.sun.media.jfxmedia.MediaException: Could not create player! : com.sun.media.jfxmedia.MediaException: Could not create player!
 [java]     at javafx.scene.media.MediaException.exceptionToMediaException(MediaException.java:146)
 [java]     at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:511)
 [java]     at javafx.scene.media.MediaPlayer.<init>(MediaPlayer.java:414)
 [java]     at alpha.Main.start(Main.java:71)
 [java]     at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
 [java]     at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
 [java]     at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
 [java]     at java.security.AccessController.doPrivileged(Native Method)
 [java]     at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
 [java]     at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
 [java]     at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
 [java]     at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
 [java]     ... 1 more
 [java] Caused by: com.sun.media.jfxmedia.MediaException: Could not create player!
 [java]     at com.sun.media.jfxmediaimpl.NativeMediaManager.getPlayer(NativeMediaManager.java:274)
 [java]     at com.sun.media.jfxmedia.MediaManager.getPlayer(MediaManager.java:118)
 [java]     at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:467)
 [java]     ... 11 more
 [java] Exception running application alpha.Main
 [java] Java Result: 1

編輯2：

我安裝了libavcodec56 ， libavformat56和GLIB 2.42.1。

# pkg-config --modversion glib-2.0
2.42.1

Answer 1

在http://www.oracle.com/technetwork/java/javase/downloads/index.html的“ 認證系統配置”部分中

您必須安裝GLIB 2.28才能運行JavaFX Media。

必須安裝以下組件才能支持AAC音頻，MP3音頻，H.264視頻和HTTP Live Streaming：

• Ubuntu Linux 12.04或同等版本上的libavcodec53和libavformat53。

[...]

• VP6視頻支持不需要任何第三方模塊。
• 在Linux平台上，安裝libavformat會自動導致安裝libavcodec。

請仔細檢查您是否已安裝所有必需的庫。

Answer 2

Media的構造函數的參數為String ，必須將其格式化為有效的URI。 所以代替：

Media theme = new Media(getHostServices().getDocumentBase() + "src/sound/theme_bttf.mp3");

嘗試這個：

Media theme = new Media(new File(getHostServices().getDocumentBase() + "src/sound/theme_bttf.mp3").toUri().toString());

Answer 3

在這種情況下有一個Java錯誤。 嘗試下載已修復的新版本（我下載了jdk 8u102）。 http://www.oracle.com/technetwork/pt/java/javase/downloads/jdk8-downloads-2133151.html