我怎么可以录制音频文件作为.M4A格式？

问题描述

如何可以录制音频文件作为的.m4a格式。

how can i record audio file as .m4a format.

我用下面的code：

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..

推荐答案

在这里你设置在你的榜样，输出格式为：

Here's where you set the output format in your example:

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

和是可用的输出格式列表其中包括：

and here is a list of the available output formats which include:

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

和这里的支持的格式看起来像它支持MPEG-4音频（M4A），所以我的假设的，你应该选择 MediaRecorder.OutputFormat.MPEG_4

and here's more information about supported formats which looks like it supports MPEG-4 audio (m4a) so I assume that you should choose MediaRecorder.OutputFormat.MPEG_4

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