JMF で音声形式を変更したけど，フォーマットが期待外れだった

Windows XP Startup.wav を mp3 にしたが，MPEG2-LayerII となっている．ファイルサイズは10分の1以下になっている．Windows XP Shutdown.mp3 は ffmpeg.exe の出力で，こちらは MPEG2-LayerIII だ．

[Windows XP Startup.mp3]
MPEG2-LayerII 22.05kHz 64.00kb/s CBR Stereo 184f
00:00:04.806 (4.806sec) / 38,452Bytes

[Windows XP Startup.wav]
PCM 22.05kHz 16Bit 2ch 705.60kb/s
[RIFF(WAVE)] 00:00:04.814 (4.814sec) / 424,644Bytes

[Windows XP Shutdown.mp3]
MPEG2-LayerIII 22.05kHz 64.00kb/s CBR JointStereo/MS 125f
ID3v2
00:00:03.265 (3.265sec) / 26,154Bytes

真空波動研Lite 081122 / DLL 081122

package test;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.media.CannotRealizeException;
import javax.media.ControllerEvent;
import javax.media.ControllerListener;
import javax.media.NoDataSinkException;
import javax.media.NoProcessorException;
import javax.media.protocol.DataSource;
import javax.media.Processor;
import javax.media.DataSink;
import javax.media.EndOfMediaEvent;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.Format;
import javax.media.ProcessorModel;
import javax.media.format.AudioFormat;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.FileTypeDescriptor;

public class AudioConvert implements ControllerListener {

	public Processor processor;
	public DataSource source;
	public DataSink sink;

	public AudioConvert() throws MalformedURLException, IOException, NoProcessorException, CannotRealizeException, NoDataSinkException {
		File sfile = new File("resource/Windows XP Startup.wav");

		MediaLocator slocator = new MediaLocator(sfile.toURL());
		Format formats[] = new Format[1];
		formats[0] = new AudioFormat(AudioFormat.MPEG);
		FileTypeDescriptor outputType =
				new FileTypeDescriptor(FileTypeDescriptor.MPEG_AUDIO);
//		ContentDescriptor outputType = new ContentDescriptor("resource/audio.mpeg");
//		ContentDescriptor outputType =
//				new ContentDescriptor(FileTypeDescriptor.MPEG_AUDIO);

		processor = Manager.createRealizedProcessor(
				new ProcessorModel(slocator, formats, outputType));
		processor.addControllerListener(this);

		source = processor.getDataOutput();
		File dfile = new File("resource/Windows XP Startup.mp3");

		MediaLocator dlocator = new MediaLocator(dfile.toURL());
		sink = Manager.createDataSink(source, dlocator);
		sink.open();
		sink.start();
		processor.start();
	}

	public void controllerUpdate(ControllerEvent e) {
		if (e instanceof EndOfMediaEvent) { //StopEvent
			processor.stop();
			processor.close();
			sink.close();
			System.exit(0);
		}
	}

	public static void main(String[] args) {
		try {
			AudioConvert conv = new AudioConvert();
		} catch (MalformedURLException ex) {
			Logger.getLogger(AudioConvert.class.getName()).log(Level.SEVERE, null, ex);
		} catch (IOException ex) {
			Logger.getLogger(AudioConvert.class.getName()).log(Level.SEVERE, null, ex);
		} catch (NoProcessorException ex) {
			Logger.getLogger(AudioConvert.class.getName()).log(Level.SEVERE, null, ex);
		} catch (CannotRealizeException ex) {
			Logger.getLogger(AudioConvert.class.getName()).log(Level.SEVERE, null, ex);
		} catch (NoDataSinkException ex) {
			Logger.getLogger(AudioConvert.class.getName()).log(Level.SEVERE, null, ex);
		}finally{
			System.exit(0);
		}
	}
}