Question

很抱歉，如果这似乎是一个简单的问题，但这是我第一次在编程中试验声音。

我在这里想要实现的是将通过TargetDataLine对象获得的数据编码为.ogg文件。我的出发点是官方Java文档https://docs.oracle.com/javase/tutorial/sound/capturing.html。

我正在使用JavaZoom的Vorbis API http://www.javazoom.net/vorbisspi/vorbisspi.html。

private static void recordAudio(int id) {

    Map<String, Object> myMap = new HashMap<String, Object>();
    myMap.put("duration", 0);
    myMap.put("title", "title_test");
    myMap.put("author", "author_test");
    myMap.put("album", "album_test");
    myMap.put("date", "date_test");
    myMap.put("copyright", "copyright_test");
    myMap.put("comment", "comment_test");

    VorbisAudioFormat format = new VorbisAudioFormat(VorbisEncoding.VORBISENC, 48000.F, 16, 2, 4, 48000.F, true, myMap);
    Mixer mixer = AudioSystem.getMixer(AudioSystem.getMixerInfo()[id]);

    TargetDataLine line;
    DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
    if (!AudioSystem.isLineSupported(info)) {
        System.out.println("Line is not supported.");
    }
    try {
        line = (TargetDataLine) mixer.getLine(info);
        line.open(format);
        line.start();

        AudioInputStream ais = new AudioInputStream(line);
        File auFile = new File("path/stream_test.ogg");
        AudioFileFormat.Type fileType = VorbisFileFormatType.OGG;
        AudioSystem.write(ais, fileType, auFile);

    } catch (LineUnavailableException ex) {
        System.out.println("Line is unavailable.");
        ex.printStackTrace();
    } catch (FileNotFoundException e) {
        System.out.println("File not found.");
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

使用此代码，我在控制台中获得以下输出。

Line is not supported.
Exception in thread "main" java.lang.IllegalArgumentException: Line unsupported: interface TargetDataLine supporting format VORBISENC 48000.0 Hz, 16 bit, stereo, 4 bytes/frame, 
    at com.sun.media.sound.DirectAudioDevice.getLine(Unknown Source)
    at test_mixer.Main.recordAudio(Main.java:60)
    at test_mixer.Main.main(Main.java:35)

我已尝试将enconding更改为VorbisEncoding.PCM_SIGNED，但随后控制台会抛出以下错误。

Exception in thread "main" java.lang.IllegalArgumentException: could not write audio file: file type not supported: OGG
at javax.sound.sampled.AudioSystem.write(Unknown Source)
at test_mixer.Main.recordAudio(Main.java:66)
at test_mixer.Main.main(Main.java:35)

将TargetDataLine数据编码为Ogg Vorbis文件

0 个答案: