Re: Java Sound mp3 support?

From:

"Matt Humphrey" <matth@iviz.com>

Newsgroups:

comp.lang.java.help

Date:

Thu, 16 Jul 2009 10:47:52 -0400

Message-ID:

<CrGdnYphCJA9oMLXRVn_vwA@giganews.com>

"Keith Thurman" <kpthurma@negatroid.ube.invalid> wrote in message
news:h3l5cg$pfs$1@aioe.org...

Matt Humphrey wrote:

"Keith Thurman" <kpthurma@negatroid.ube.invalid> wrote in message
news:h3jjbu$1p2$1@aioe.org...

In my quest to get mp3 support in Java, I landed at

http://www.tritonus.org/plugins.html

I'm currently using JMF2.1.1e for a Linux / Fedora Core 5 jukebox playing
mp3's under JRE 1.5.0_07. I use the javamp3 plugin, with these
instructions.

http://java.sun.com/javase/technologies/desktop/media/jmf/mp3/download.html

Note that these instructions require placing jmf.jar into the jre's ext
folder, which is usually not a good installation technique, but does work
here. Also, you have to run a registration program once upon
installation.

Thanks, but this doesn't quite work either.

Installer downloaded and ran without a hitch.

The registration fails:

java.lang.NoClassDefFoundError: com/sun/media/codec/audio/AudioCodec

Ok, I think things are much more complicated under the hood and I don't have
a good explanation for what's going on, but I've reviewed my installation
process and re-tried it on another machine and I get that it both works and
doesn't work at the same time.

On Windows, I install JMF just as it is and without any mp3 plugin. JMF
makes JMStudio available and this program can play mp3s without any plugin,
which I've never understood. that. I've been trying to install javamp3-1_0,
but the installer hangs and I have no evidence on my Windows machine that I
ever used it. I made the following SCCCE from my Linux jukebox, which
requires links to jmf.jar and sound.jar to compile and run.

public class Play {
    public static void main(String[] args) {
        try {
            MediaLocator ml = new MediaLocator(new File(args[0]).toURL());
            Player currentSongPlayer = Manager.createRealizedPlayer(ml);
            currentSongPlayer.addControllerListener(new ControllerListener
() {
                public void controllerUpdate (ControllerEvent e) {
                    System.out.println (e.toString());
                }
            });
            currentSongPlayer.prefetch();
            currentSongPlayer.start();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

This code plays an mp3 on both Windows and Linux.

I then tried Knute's code, but it would only give this error on Windows:
javax.sound.sampled.UnsupportedAudioFileException: could not get audio input
stream from input file

I haven't tried Knute's code on my Fedora Core 5 yet, but FC5 is my
deployment platform and it definately requires a plugin and it regularly
plays JMF mp3s (using the technique shown above)

I have no idea why one use of the API works and another does not. I'll let
you know if I find out more.

Cheers,