Android mediaRecorder Stop 失败 - 尝试指定设备的最高记录质量

Question

所以正如标题所说，我收到了 mediaRecorder 停止异常 -1007，但这并不是重点。

要明确我的问题是如何避免出现指定错误，并为正在运行的设备录制最优质的音频。

我需要能够在任何具有 >=API16

MIC 的 Android 设备上录制高质量音频

这是我正在使用的代码，包括注释掉之前的工作：

public class RecordingHandler {

    private static MediaRecorder recorder;

    static void beginRecording(String output) throws Exception {

        ditchMediaRecorder();
        File outFile = new File(output);
        if (outFile.exists())
            outFile.delete();
        recorder = new MediaRecorder();
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.AAC_ADTS);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        recorder.setOutputFile(output);

        try {
            recorder.prepare();
            recorder.start();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        //this was working before
//      recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
//      recorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
//      recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
//      recorder.setOutputFile(output);
//
//      try {
//          recorder.prepare();
//      } catch (IOException e) {
//          Log.e("Recording Handler", "prepare() failed");
//      }
//      recorder.start();
    }

    static void ditchMediaRecorder() {
        // if we have the recorder, release it
        if (recorder != null)
            recorder.release();
    }

    static void stopRecording() {
        if (recorder != null) {
            recorder.stop(); //error happening here
            recorder.reset();
            recorder.release();
            recorder = null;
        }
    }

}

当前错误：

05-02 21:00:29.443: E/MediaRecorder(28252): stop failed: -1007
05-02 21:00:29.443: E/InputEventReceiver(28252): Exception dispatching input event.
05-02 21:00:29.443: E/MessageQueue-JNI(28252): Exception in MessageQueue callback: handleReceiveCallback
05-02 21:00:29.443: E/MessageQueue-JNI(28252): java.lang.RuntimeException: stop failed.
05-02 21:00:29.443: E/MessageQueue-JNI(28252):  at android.media.MediaRecorder.stop(Native Method)
05-02 21:00:29.443: E/MessageQueue-JNI(28252):  at com.appulse.beatbox.RecordingHandler.stopRecording(RecordingHandler.java:56)

如果您的答案包含“THREE_GPP”或“AMR_NB”字样，则根本不会被接受，因为其中的音频完全是垃圾。

感谢任何可以提前帮助的人，如果我看起来有点生气，我很抱歉，这真的很烦人。

Answer 1

以下是我在我的一个应用中使用的 sn-p，用于录制最高质量的音频。请注意，并非所有设备都支持 44.1 kHz 的采样率。目前，无法检查设备是否支持特定的音频源、采样率或文件类型。您必须自己处理 - 开始录制，检查录制是否失败（如果文件未保存到目录）并使用所有设备（麦克风、3GP、MediaRecorder.AudioEncoder.AMR_NB）支持的设置再次开始录制。我已经更新了我的答案来处理这个问题：

MediaRecorder recorder;
File audioFile;

字符串 storeLoc = Environment.getExternalStorageDirectory() .getAbsolutePath() + "/MyRecordings/";

File path = new File(storeLoc);
    if(!path.exists())
    path.mkdir();  

开始录制：

  recorder = new MediaRecorder();


            recorder.setAudioSource(MediaRecorder.AudioSource.MIC);                                                   recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        recorder.setAudioEncodingBitRate(320000);
        recorder.setAudioSamplingRate(44100);               
        try {
                audioFile = File.createTempFile("temporaryFileName", ".mp4", path);
            } catch (IOException e) {
//          throw new RuntimeException(
//                  "Couldn't create recording audio file", e);
            }
            recorder.setOutputFile(audioFile.getAbsolutePath());
                    try {
                recorder.prepare();     
                recorder.start();

            } catch (Exception e) { 
                //couldn't start recording probably because settings not supported on device
                //so delete recording and start again but this time using basic settings
                File unSuccessfulRecFile = new File(audioFile.getAbsolutePath());
                unSuccessfulRecFile.delete();

                recorder = new MediaRecorder();

                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                //exception might also be due to filetype being mp4 so change to 3gp
            recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);                                 
                            recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

                try {
                audioFile = File.createTempFile("temporaryFileName", ".3gp", path);
                } catch (IOException eI) {}
                recorder.setOutputFile(audioFile.getAbsolutePath());

                    recorder.prepare();     
                    recorder.start();

                        }

停止录制：

recorder.stop();
recorder.release();
File from = new File(audioFile.getAbsolutePath());
File to = new File(storeLoc, "FinalFileName");
from.renameTo(to);