MediaRecorder, Aufnahme von Audio und Video hat eine sehr geringe Lautstärke

Question

Ich verwende MediaRecorder in einem Android-Projekt, um Video- und Audiodateien aufzunehmen. Es zeichnet zwar korrekt auf, aber die Lautstärke beider Dateien ist sehr, sehr niedrig.

Ich benutze diese MediaRecorder konfigurieren Audio

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
        File folder = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + ConfigApp.RECORDINGS_FOLDER); 
        if (!folder.exists()) 
         success = folder.mkdir(); 
        if (success) { 
         mFileName = folder + timeStamp + ".m4a"; 
         currentFile = mFileName; 
         chrono.setBase(SystemClock.elapsedRealtime()); 
         chrono.start(); 
         mRecorder = new MediaRecorder(); 
         mRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER); 
         mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); 
         mRecorder.setOutputFile(mFileName); 
         mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 


         try { 
          mRecorder.prepare(); 
         } catch (IOException e) { 
          Log.e(TAG, "prepare() failed"); 
         } 
         mRecorder.start(); 
         handler.post(updateVisualizer); 
        } 

und diese aufnehmen, wenn ich Video

// BEGIN_INCLUDE (configure_preview) 
    mCamera = CameraHelper.getDefaultCameraInstance(); 
    // We need to make sure that our preview and recording video size are supported by the 
    // camera. Query camera to find all the sizes and choose the optimal size given the 
    // dimensions of our preview surface. 
    Camera.Parameters parameters = mCamera.getParameters(); 
    List<Camera.Size> mSupportedPreviewSizes = parameters.getSupportedPreviewSizes(); 
    Camera.Size optimalSize = CameraHelper.getOptimalPreviewSize(mSupportedPreviewSizes, 
      mSurfaceView.getWidth(), mSurfaceView.getHeight()); 

    // Use the same size for recording profile. 
    CamcorderProfile profile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH); 
    profile.videoFrameWidth = optimalSize.width; 
    profile.videoFrameHeight = optimalSize.height; 

    // likewise for the camera object itself. 
    parameters.setPreviewSize(profile.videoFrameWidth, profile.videoFrameHeight); 
    mCamera.setParameters(parameters); 
    try { 
     // Requires API level 11+, For backward compatibility use {@link setPreviewDisplay} 
     // with {@link SurfaceView} 
     mCamera.setPreviewDisplay(mSurfaceView.getHolder()); 
     mCamera.setDisplayOrientation(90); 

    } catch (IOException e) { 
     Log.e(TAG, "Surface texture is unavailable or unsuitable" + e.getMessage()); 
     return false; 
    } 
    // END_INCLUDE (configure_preview) 


    // BEGIN_INCLUDE (configure_media_recorder) 
    mMediaRecorder = new MediaRecorder(); 

    // Step 1: Unlock and set camera to MediaRecorder 
    mCamera.unlock(); 
    mMediaRecorder.setCamera(mCamera); 

    // Step 2: Set sources 
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER); 
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 

    // Step 3: Set a CamcorderProfile (requires API Level 8 or higher) 
    mMediaRecorder.setProfile(profile); 

    // Step 4: Set output file 
    String path = getVideoFile(MediaStore.Files.FileColumns.MEDIA_TYPE_VIDEO).getAbsolutePath(); 
    currentFile = path; 
    mMediaRecorder.setOutputFile(path); 
    mMediaRecorder.setOrientationHint(270); 

    // END_INCLUDE (configure_media_recorder) 

    // Step 5: Prepare configured MediaRecorder 
    try { 
     mMediaRecorder.prepare(); 
    } catch (IllegalStateException e) { 
     Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage()); 
     releaseMediaRecorder(); 
     return false; 
    } catch (IOException e) { 
     Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage()); 
     releaseMediaRecorder(); 
     return false; 
    } 
    return true; 

ich versuchte, andere Optionen auf setAudioSource neben dem AudioSource.CAMCORDER aber ich bekomme immer geringer Lautstärke

aufzeichnen

Muss ich zusätzliche Parameter konfigurieren?

Answer 1

Versuchen Sie,

mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 

dann gesetzt Ihr Audiosource auf MIC.