W/IMediaDeathNotifier:媒体服务器死了

Question

我正在尝试使用Google Glass MIC录制音频,但我一直收到W/IMediaDeathNotifier:媒体服务器死机错误.思考？

它应该在第一次触摸时开始录制并在第二次触摸时停止,但是第一次单击时会发生错误.

package com.google.android.glass.sample.charades;

import android.media.MediaRecorder;
import java.io.IOException;
import android.util.Log;
import android.os.Environment;

public class SlideshowActivity extends Activity {

    private static final String LOG_TAG = "AudioRecordTest";
    private MediaRecorder mRecorder = null;
    private static String mFileName = Environment.getExternalStorageDirectory().getAbsolutePath() + "/audiorecordtest.3gp";
    private boolean recording = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_slideshow);

        mGestureDetector = new GestureDetector(this).setBaseListener(mBaseListener);

    }

    private void startRecording() {
        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mRecorder.setOutputFile(mFileName);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

        Log.e(LOG_TAG, "File name: " + mFileName);

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

        mRecorder.start();
    }

    private void stopRecording() {
        mRecorder.stop();
        mRecorder.release();
        mRecorder = null;
    }

    private void onRecord(boolean start) {
        if (start) {
            startRecording();
        } else {
            stopRecording();
        }
    }

}

日志:

4242-4242/com.google.android.glass.sample.charades E/AudioRecordTest:文件名:/storage/emulated/0/audiorecordtest.3gp

4242-4255/com.google.android.glass.sample.charades W/IMediaDeathNotifier:媒体服务器死亡

我还在AndroidManifest.xml文件中添加了以下权限:

<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT" />

Answer 1

尝试呼叫setPreviewDisplay,在任何地方都没有注意到,但有些人说预览被用作存储视频文件的源.

http://developer.android.com/reference/android/media/MediaRecorder.html#setPreviewDisplay(android.view.Surface)