以AMR文件格式记录音频

Question

我想用AMR文件格式录制音频。我目前正在使用下面的代码来录制音频：

outputFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "Sample.3gp";

myRecorder = new MediaRecorder();
myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myRecorder.setOutputFile(outputFile);

但是它生成.3gp文件。如何获得.amr文件？将输出文件更改为Sample.amr工作。但是这是正确的方法吗？，请帮忙

编辑现在已解决

这是我愚蠢的错误:我用了myRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);

应该是-

myRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

因此，下面的代码正在以AMR格式进行记录：

outputFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "Sample.amr";

    myRecorder = new MediaRecorder();
    myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    myRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
    myRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    myRecorder.setOutputFile(outputFile);

Answer 1

请参阅下面代码中的android OutputFormat文档尝试：

    Log.i(TAG,"Record start");
    String outputFile;
    MediaRecorder myRecorder;
    outputFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + "Sample.amr";
    Log.i(TAG,"file name: " + outputFile);

    myRecorder = new MediaRecorder();
    myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    myRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
    myRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    myRecorder.setOutputFile(outputFile);

    try {
        myRecorder.prepare();
        myRecorder.start();
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        Thread.sleep(30*1000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    myRecorder.stop();
    myRecorder.release();
    Log.i(TAG,"Record finished");

要点：

1. Out文件名使用".amr“后缀。输出格式使用OutputFormat.AMR_NB参数。
2. Encorder使用AudioEncoder.AMR_NB参数。