MediaRecorder：啓動失敗：-19

我想了解如何使用相機錄製視頻。但開始錄製時總是崩潰。我不知道爲什麼會發生。我現在不需要使用任何預覽，只需要記錄到文件。下面是代碼MediaRecorder：啓動失敗：-19

public static final String TAG = "tag"; 
    Button recBut; 
    private MediaRecorder rec; 
    private Camera camera; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     releaseCamera(); 
     recBut = (Button) findViewById(R.id.rec); 

     camera = Camera.open(0); 
     prepareCamera(camera); 
     recBut.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       if (recBut.getText().toString().equalsIgnoreCase("start")) { 
        rec.start(); //logcat say that problem here 
        recBut.setText("RECING..."); 
       } else { 
        rec.stop(); 
        rec.reset(); 
        rec.release(); 
        rec = null; 
        recBut.setText("START"); 
        releaseCamera(); 
       } 
      } 
     }); 
    } 

    private void prepareCamera(Camera camera) { 
     List<Camera.Size> list = camera.getParameters().getSupportedVideoSizes(); 
     Log.i(TAG, "GENERAL SIZE - " + list.size()); 
     for (int i = 0; i < list.size(); i++) { 
      Log.i(TAG, "SIZE| width - " + list.get(i).width + " hight - " + list.get(i).height); 
     } 
     rec = new MediaRecorder(); 
     camera.getParameters().setRecordingHint(true); 
     rec.setCamera(camera); 
     rec.setAudioSource(MediaRecorder.AudioSource.DEFAULT); 
     rec.setVideoSource(MediaRecorder.VideoSource.DEFAULT); 
     rec.setOutputFormat(MediaRecorder.OutputFormat.WEBM); 
     rec.setVideoSize(720, 1280); 
     rec.setVideoFrameRate(24); 
     rec.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP); 
     rec.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); 
     //  rec.setProfile(CamcorderProfile.get(0, CamcorderProfile.QUALITY_HIGH)); 
     rec.setOutputFile(
       Environment.getExternalStorageDirectory() + "/" + Environment.DIRECTORY_MOVIES + "/test.mp4"); 
     rec.setPreviewDisplay(null); 
     try { 
      rec.prepare(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    private void releaseCamera() { 
     if (camera != null) { 
      camera.release(); 
      camera = null; 
     } 
    } 
}

清單，以防萬一：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.lexz.basiccamera"> 

    <uses-permission android:name="android.permission.CAMERA"/> 
    <uses-permission android:name="android.permission.RECORD_AUDIO"/> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity android:name=".MainActivity"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 

</manifest>

的logcat：

E/MediaRecorder: start failed: -19 
E/AndroidRuntime: FATAL EXCEPTION: main 
Process: com.lexz.basiccamera, PID: 28879 
java.lang.RuntimeException: start failed. 
at android.media.MediaRecorder.start(Native Method) 
at com.lexz.basiccamera.MainActivity$1.onClick(MainActivity.java:35) 
at android.view.View.performClick(View.java:4802) 
at android.view.View$PerformClick.run(View.java:20101) 
at android.os.Handler.handleCallback(Handler.java:810) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:189) 
at android.app.ActivityThread.main(ActivityThread.java:5529) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:956) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:751)

SOLUTION

貌似正常工作相機類需要有SurfaceView，SurfaceHolder並實現SurfaceHolder.Callback和不要忘記將此曲面視圖設置爲相機。作爲工作示例check this。

來源

2016-08-23 Arthur

rec.setOutputFormat(MediaRecorder.OutputFormat.WEBM);

它是WEBM容器中的數據。嘗試更換

rec.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

來源

2016-08-23 20:10:00

不，事實並非如此。看看我上面的解決方案。 – Arthur

對我來說，問題是我沒有解鎖相機。在設置相機解鎖之前：

private void prepareCamera(Camera camera) { 
    ... 
    camera.unlock();  // Unlock the camera 
    rec.setCamera(camera); 
    ...

來源

2017-10-30 12:38:28

MediaRecorder：啓動失敗：-19

回答

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