关于audiorecord 噪音问题

sibylslove 2010-07-19 11:35:26

录出来之后全是噪音



int frequency = 8000;

	int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;

	int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;

	File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/reverseme.pcm");

....



 OutputStream os = new FileOutputStream(file);

            BufferedOutputStream bos = new BufferedOutputStream(os);

            DataOutputStream dos = new DataOutputStream(bos);

             

            // Create a new AudioRecord object to record the audio.

            int bufferSize = AudioRecord.getMinBufferSize(frequency, channelConfiguration,  audioEncoding);

            AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, frequency, channelConfiguration, audioEncoding, bufferSize);

            

            short[] buffer = new short[bufferSize];   

            audioRecord.startRecording();

            int nCount = 1;

            

            while(nCount<21)

            {

	            int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);

	            Log.i("550", Integer.toString(bufferReadResult));

	            

	            for (int i = 0; i < bufferReadResult; i++)

	            {

	            	dos.writeShort(buffer[i]);

	            	Log.i("540", "123");

	            }

	            nCount++;

            }

            audioRecord.stop();

            dos.close();

...全文

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画个太阳作晴天 2013-01-05

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private static int[] mSampleRates = new int[] { 8000, 11025, 22050, 44100 }; public static final String TAG = "find"; public AudioRecord findAudioRecord() { for (int rate : mSampleRates) { for (short audioFormat : new short[] { AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT }) { for (short channelConfig : new short[] { AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO }) { try { Log.d(TAG, "Attempting rate " + rate + "Hz, bits: " + audioFormat + ", channel: " + channelConfig); int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat); if (bufferSize != AudioRecord.ERROR_BAD_VALUE) { // check if we can instantiate and have a success AudioRecord recorder = new AudioRecord(AudioSource.DEFAULT, rate, channelConfig, audioFormat, bufferSize); if (recorder.getState() == AudioRecord.STATE_INITIALIZED) return recorder; } } catch (Exception e) { Log.e(TAG, rate + "Exception, keep trying.",e); } } } } return null; }

Gongqingshuai 2012-08-09

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[Quote=引用 7 楼的回复:]

1. 参数没对
2. 要看机器的,有的机器不支持某些参数
以前在WM上面做了一个mp3编码的程序就是,通过麦克风录音,同一份代码设置相同的码率,比特率,单双声道在不同的机器上面表现完全不一样,其中一台录制出来效果非常好,另外一个就全是杂音.
[/Quote]
如果不同机器参数还不一样，那怎么能让做出来的东西，在所有机器上运行呢，毕竟我们不是会专门一台或一个品牌的机子做开发的

qq343931720 2011-12-21

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求楼主给个解决方案呐

ylgiii 2010-08-19

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这是我写的,可用,你试一下吧
private Runnable threadStartRec = new Runnable()
{

public void run() {
// TODO Auto-generated method stub

//start record
int minBuffSize = AudioRecord.getMinBufferSize(8000,
AudioFormat.CHANNEL_CONFIGURATION_MONO,AudioFormat.ENCODING_PCM_16BIT);
AudioRecord mAudioRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC, 8000,
// AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT, minBuffSize*3);
mAudioRecorder.startRecording();

byte[] mBuffer = new byte[minBuffSize*3];

int len = 0;
File fw = new File ( strFileName );
FileOutputStream fisWriter = null;

try {
fw.createNewFile();
fisWriter = new FileOutputStream (fw);
//FileInputStream fisReader = new FileInputStream (fw);

}
catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

while(bRecording)
{
len = 0;
len = mAudioRecorder.read(mBuffer, 0, minBuffSize);
//write into file
// if(len>0&&len<=minBuffSize)
{
//
try {
fisWriter.write(mBuffer);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block

e.printStackTrace();
}
}//end of while
try {
fisWriter.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}//end of Run
};