AudioRecord文件大小有点大

时间:2017-03-05 01:20:38

标签: android audio recording

我正在努力解决这个问题,我已经改变了比特率以减少录制文件大小,我的应用程序正确地将音频文件发布到服务器,但我想最小化文件大小,这是我的记录代码

 private void startRecording() throws IOException {

        String state = android.os.Environment.getExternalStorageState();
        if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
            throw new IOException("No SD mounted.  It is" + state
                    + ".");

        }

        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setAudioSamplingRate(44100);
        mRecorder.setAudioEncodingBitRate(44100);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);


        File path = new File(Environment.getExternalStorageDirectory()
                .getPath());

        if (!path.exists() && !path.mkdirs()) {
            throw new IOException("The file directory is invalid.");
        }else{

            try {
                archivo = File.createTempFile("audio", ".3gp", path);
            } catch (IOException e) {
            }

        }

        mRecorder.setOutputFile(archivo.getAbsolutePath());
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);


        try {
            mRecorder.prepare();
        } catch (IOException e) {
            Log.e(LOG_TAG, "prepare() failed");
        }

        mRecorder.start();


    }
  

我现在正在进行一分钟录制336 kb,我想   减少到每分钟大约100 - 200 kb而不会松动   质量很高

1 个答案:

答案 0 :(得分:1)

你可以试试几件事。

1)使用AMR(自适应多速率)进行更高压缩:

recorder.setAudioEncoder(mRecorder.AudioEncoder.AMR_NB);

AMR宽带和AMR窄带是设备用于电话呼叫的编码方法。可能没有你所需的质量。

2)使用mono 1频道:

mRecorder.setAudioChannels (1)

// Sets the number of audio channels for recording. Call this method before 
// prepare().
// Usually it is either 1 (mono) or 2 (stereo).