录音不适用于java

我试图通过扬声器/耳机在我的Windows机器上播放的java录制声音。

我遇到的问题是我找不到AudioSystem支持的单个TargetDataLine。

我尝试了getSupportedFormats（）方法来检查是否有任何我可以得到的TargetDataLine但是我有0行。 如果将getSupportedFormats中的参数更改为SourceDataLine，我有9个可用行。

Vector formats = getSupportedFormats(TargetDataLine.class); System.out.println(formats.size()); public static Vector getSupportedFormats(Class dataLineClass) { /* * These define our criteria when searching for formats supported * by Mixers on the system. */ float sampleRates[] = { (float) 8000.0, (float) 16000.0, (float) 44100.0 }; int channels[] = { 1, 2 }; int bytesPerSample[] = { 2 }; AudioFormat format; DataLine.Info lineInfo; //SystemAudioProfile profile = new SystemAudioProfile(); // Used for allocating MixerDetails below. Vector formats = new Vector(); for (Mixer.Info mixerInfo : AudioSystem.getMixerInfo()) { for (int a = 0; a < sampleRates.length; a++) { for (int b = 0; b < channels.length; b++) { for (int c = 0; c < bytesPerSample.length; c++) { format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, sampleRates[a], 8 * bytesPerSample[c], channels[b], bytesPerSample[c], sampleRates[a], false); lineInfo = new DataLine.Info(dataLineClass, format); if (AudioSystem.isLineSupported(lineInfo)) { /* * TODO: To perform an exhaustive search on supported lines, we should open * TODO: each Mixer and get the supported lines. Do this if this approach * TODO: doesn't give decent results. For the moment, we just work with whatever * TODO: the unopened mixers tell us. */ if (AudioSystem.getMixer(mixerInfo).isLineSupported(lineInfo)) { formats.add(format); } } } } } } return formats; } 

此外，我尝试了audioFormats方法返回的大多数格式仍然无法找到一行。

 public List audioFormats() throws LineUnavailableException{ Mixer.Info[] mi = AudioSystem.getMixerInfo(); List audioFormats = new ArrayList(); for (Mixer.Info info : mi) { System.out.println("info: " + info); Mixer m = AudioSystem.getMixer(info); System.out.println("mixer " + m); Line.Info[] sl = m.getSourceLineInfo(); for (Line.Info info2 : sl) { System.out.println(" info: " + info2); Line line = AudioSystem.getLine(info2); if (line instanceof SourceDataLine) { SourceDataLine source = (SourceDataLine) line; DataLine.Info i = (DataLine.Info) source.getLineInfo(); for (AudioFormat format : i.getFormats()) { audioFormats.add(format); System.out.println(" format: " + format); } } } } return audioFormats; } 

这是我尝试过的示例类

  import javax.sound.sampled.*; import javax.sound.sampled.AudioFormat.Encoding; import java.io.*; public class Recorder { // record duration, in milliseconds static final long RECORD_TIME = 30000; // 1 minute // path of the wav file File wavFile = new File("spacemusic.wav"); // format of audio file AudioFileFormat.Type fileType = AudioFileFormat.Type.WAV; // the line from which audio data is captured TargetDataLine line; /** * Defines an audio format */ AudioFormat getAudioFormat() { float sampleRate = 44100; int sampleSizeInBits = 16; int channels = 2; boolean bigEndian = false; Encoding encoding = Encoding.PCM_SIGNED; int frameSize = 4; float framRate = 44100; /* AudioFormat format = new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian);*/ AudioFormat format = new AudioFormat(encoding, sampleRate, sampleSizeInBits, channels, frameSize, framRate, bigEndian); return format; } /** * Captures the sound and record into a WAV file * @throws UnsupportedAudioFileException */ void start() throws UnsupportedAudioFileException { try { AudioFormat format = getAudioFormat(); DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); if (!AudioSystem.isLineSupported(info)) { System.out.println("Line not supported"); System.exit(0); } line = (TargetDataLine) AudioSystem.getLine(info); line.open(format); line.start(); // start capturing System.out.println("Start capturing..."); AudioInputStream ais = new AudioInputStream(line); System.out.println("Start recording..."); // start recording AudioSystem.write(ais, fileType, wavFile); } catch (LineUnavailableException ex) { ex.printStackTrace(); } catch (IOException ioe) { ioe.printStackTrace(); } } /** * Closes the target data line to finish capturing and recording */ void finish() { line.stop(); line.close(); System.out.println("Finished"); } /** * Entry to run the program * @throws UnsupportedAudioFileException */ public static void main(String[] args) throws UnsupportedAudioFileException { final Recorder recorder = new Recorder(); // creates a new thread that waits for a specified // of time before stopping Thread stopper = new Thread(new Runnable() { public void run() { try { Thread.sleep(RECORD_TIME); } catch (InterruptedException ex) { ex.printStackTrace(); } recorder.finish(); } }); stopper.start(); // start recording recorder.start(); } 

}

关于如何获得支持的线路的任何想法，以便我可以继续录制。 谢谢

Answer 1

你可以试试这堂课。 对我而言，完美无缺。 我将麦克风中的音频捕获并保存到文件中（即file.au）

首先，复制所有内容并在项目中创建一个新类

`

  import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.io.*; import javax.sound.sampled.*; // Class for capturing and saving into file, audio from mic public class AudioCaptureAndSaveIntoFile { boolean stopCapture = false; ByteArrayOutputStream byteArrayOutputStream; AudioFormat audioFormat; TargetDataLine targetDataLine; AudioInputStream audioInputStream; SourceDataLine sourceDataLine; FileOutputStream fout; AudioFileFormat.Type fileType; public AudioRecorder() { } // Captures audio input // from mic. // Saves input in // a ByteArrayOutputStream. public void captureAudio() { try { audioFormat = getAudioFormat(); DataLine.Info dataLineInfo = new DataLine.Info( TargetDataLine.class, audioFormat); targetDataLine = (TargetDataLine) AudioSystem.getLine(dataLineInfo); targetDataLine.open(audioFormat); targetDataLine.start(); // Thread to capture from mic // This thread will run till stopCapture variable // becomes true. This will happen when saveAudio() // method is called. Thread captureThread = new Thread(new CaptureThread()); captureThread.start(); } catch (Exception e) { System.out.println(e); System.exit(0); } } // Saves the data from // ByteArrayOutputStream // into a file public void saveAudio(File filename) { stopCapture = true; try { byte audioData[] = byteArrayOutputStream.toByteArray(); InputStream byteArrayInputStream = new ByteArrayInputStream( audioData); AudioFormat audioFormat = getAudioFormat(); audioInputStream = new AudioInputStream(byteArrayInputStream, audioFormat, audioData.length / audioFormat.getFrameSize()); DataLine.Info dataLineInfo = new DataLine.Info( SourceDataLine.class, audioFormat); sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo); sourceDataLine.open(audioFormat); sourceDataLine.start(); // This thread will actually do the job Thread saveThread = new Thread(new SaveThread(filename)); saveThread.start(); } catch (Exception e) { System.out.println(e); System.exit(0); } } public AudioFormat getAudioFormat() { float sampleRate = 8000.0F; // You can try also 8000,11025,16000,22050,44100 int sampleSizeInBits = 16; int channels = 1; boolean signed = true; boolean bigEndian = false; return new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian); } class CaptureThread extends Thread { // temporary buffer byte tempBuffer[] = new byte[10000]; public void run() { byteArrayOutputStream = new ByteArrayOutputStream(); stopCapture = false; try { while (!stopCapture) { int cnt = targetDataLine.read(tempBuffer, 0, tempBuffer.length); if (cnt > 0) { byteArrayOutputStream.write(tempBuffer, 0, cnt); } } byteArrayOutputStream.close(); } catch (Exception e) { System.out.println(e); System.exit(0); } } } class SaveThread extends Thread { // Set a file from saving from ByteArrayOutputStream File fname; public SaveThread(File fname) { this.fname = fname; } // byte tempBuffer[] = new byte[10000]; public void run() { try { int cnt; if (AudioSystem.isFileTypeSupported(AudioFileFormat.Type.AU, audioInputStream)) { AudioSystem.write(audioInputStream, AudioFileFormat.Type.AU, fname); } } catch (Exception e) { System.out.println(e); System.exit(0); } } } } ` 

在您的项目中使用上面的类，如下所示：

要将麦克风中的音频捕获到临时的ByteArrayOutput对象中，请首先：

audiorec = new AudioCaptureAndSaveIntoFile(); audiorec.captureAudio();

并保存到文件中：

  audiorec.saveAudio(savefile); 

注意：您保存的文件应以ie结尾。 “.au”或“.wav”