如何将音频文件录制为.m4a格式?

时间:2011-09-09 06:20:05

标签: android record

如何将音频文件录制为.m4a格式。

我正在使用以下代码:

public void startRecording() throws IOException {

    recorder = new MediaRecorder();

    path = "/sdcard/pithysongs_" + System.currentTimeMillis() + ".m4a";

    String state = android.os.Environment.getExternalStorageState();

    if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
        throw new IOException("SD Card is not mounted.  It is " + state
                + ".");
    }

    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    recorder.setOutputFile(path);
    recorder.prepare();
    recorder.start();
    }

感谢..

1 个答案:

答案 0 :(得分:7)

您可以在此处设置示例中的输出格式:

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

here是可用输出格式的列表,其中包括:

AMR_WB  AMR WB file format
DEFAULT     
MPEG_4  MPEG4 media file format
RAW_AMR     AMR NB file format
THREE_GPP   3GPP media file format

以及more information关于支持的格式,看起来它支持MPEG-4音频(m4a)所以我假设你应该选择MediaRecorder.OutputFormat.MPEG_4