I try to open a MOV video file with JavaFX:
Media media = new Media ("file:/tmp/file.MOV");
But it throws a MediaException: MEDIA_UNSUPPORTED.
However, if I simply change the file extension from .MOV to .MP4, it works perfectly, and the video is played with no error.
How can I force JavaFX to play my file without having to rename it?
Well that was a fun two hours. Here you go! Just make sure you have a zero byte mp4 file like in the example. It's pretty key in how it works.
public class TestFrame extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
StackPane root = new StackPane();
File actualFile = new File("shelter.mov");
File emptyfile = new File("blank.mp4");
Media media = new Media(emptyfile.toURI().toString());
copyData(media, actualFile);
MediaPlayer mediaPlayer = null;
try {
mediaPlayer = new MediaPlayer(media);
} catch (Exception e) {
e.printStackTrace();
}
mediaPlayer.setAutoPlay(true);
MediaView mediaView = new MediaView(mediaPlayer);
root.getChildren().add(mediaView);
Scene scene = new Scene(root, 720, 480);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
private void copyData(Media media, File f) {
try {
Field locatorField = media.getClass().getDeclaredField("jfxLocator");
// Inside block credits:
// http://stackoverflow.com/questions/3301635/change-private-static-final-field-using-java-reflection
{
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(locatorField, locatorField.getModifiers() & ~Modifier.FINAL);
locatorField.setAccessible(true);
}
CustomLocator customLocator = new CustomLocator(f.toURI());
customLocator.init();
customLocator.hack("video/mp4", 100000, f.toURI());
locatorField.set(media, customLocator);
} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
static class CustomLocator extends Locator {
public CustomLocator(URI uri) throws URISyntaxException {
super(uri);
}
@Override
public void init() {
try {
super.init();
} catch (Exception e) {
}
}
public void hack(String type, long length, URI uri){
this.contentType = type;
this.contentLength = length;
this.uri = uri;
this.cacheMedia();
}
}
}
How it works: Normally the default Locator throws an exception about the content type and it all ends there. Replacing the Media's locator with a custom one then manually setting the contentType, length, and uri gets it to play without a peep.
