jmf wav到mp3转换问题

Question

我正在尝试使用以下代码将wav文件转换为mp3格式。创建了一个mp3文件，但它是没有任何内容的空白文件。可能导致这种情况的任何想法。

        Format[] FORMATS = new Format[] { new AudioFormat(
                AudioFormat.LINEAR) };
        String srcFilePath = "C:" + File.separator + "Users"
                + File.separator + "vkiran" + File.separator + "Desktop"
                + File.separator + "test" + File.separator + "4a714ea2.wav";
        String mp3FilePath = "C:" + File.separator + "Users"
                + File.separator + "vkiran" + File.separator + "Desktop"
                + File.separator + "test" + File.separator + "4a714ea2.mp3";
        File srcFile = new File(srcFilePath);
        File destFile = new File(mp3FilePath);

        MediaLocator source = new MediaLocator(srcFile.toURL());

        DataSource d = Manager.createDataSource(source);

        ContentDescriptor cd = new ContentDescriptor(
                FileTypeDescriptor.MPEG_AUDIO);

        Processor p = Manager.createRealizedProcessor(new ProcessorModel(d,
                FORMATS, cd));

        p.configure();

        System.out.println((p.getDuration()).getSeconds());

        MediaLocator destination = new MediaLocator(destFile.toURL());
        DataSource ds = p.getDataOutput();
        DataSink sink = Manager.createDataSink(p.getDataOutput(),
                destination);
        sink.open();
        sink.start();

        sink.stop();
        sink.close();

        p.stop();
        p.close();