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POGetting error Start failed -16 while starting MediaRecorder in Android
 

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  1. POGetting error Start failed -16 while starting MediaRecorder in Android
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    <p>I am new to advanced technologies like Video recording in android. I am trying to create a simple application to record video.</p> <p>This is the following code, I have used to record video.</p> <pre><code> private PrintWriter out = null; private final MediaRecorder mediaRecorder = new MediaRecorder(); private final Camera camera = getCameraInstance(); private CameraPreview surfaceView = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); surfaceView = new CameraPreview(this, camera); FrameLayout frameLayout = (FrameLayout)findViewById(R.id.frameLayout); frameLayout.addView(surfaceView); Parameters params = camera.getParameters(); List&lt;Size&gt; sizes = params.getSupportedPreviewSizes(); Size optimalSize = getOptimalPreviewSize(sizes, 200, 200); params.setPreviewSize(optimalSize.width, optimalSize.height); mediaRecorder.setCamera(camera); mediaRecorder.setPreviewDisplay(surfaceView.getHolder().getSurface()); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER); mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP); mediaRecorder.setVideoSize(optimalSize.width, optimalSize.height); mediaRecorder.setOutputFile("/sdcard/test.mpg"); } </code></pre> <p>And I am calling the start() Method inside onClick() method of a button</p> <pre><code>public void startRecording(View view){ try { mediaRecorder.start(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); releaseMediaRecorder(); } catch(Exception e){ e.printStackTrace(); releaseMediaRecorder(); } } </code></pre> <p>And this is my SurfaceView Code</p> <pre><code>/** A basic Camera preview class */ public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback { private SurfaceHolder mHolder; private final Camera mCamera; private final Context context; public CameraPreview(Context context, Camera camera) { super(context); mCamera = camera; this.context = context; mHolder = getHolder(); mHolder.addCallback(this); mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } public void surfaceCreated(SurfaceHolder holder) { try { mCamera.setPreviewDisplay(holder); mCamera.startPreview(); } catch (IOException e) { Log.d(this.getClass().getName(), "Error setting camera preview: " + e.getMessage()); e.printStackTrace(); } } public void surfaceDestroyed(SurfaceHolder holder) { if(context instanceof MainActivity){ ((MainActivity)context).stopMediaPlayer(); } } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { if (mHolder.getSurface() == null){ return; } try { mCamera.stopPreview(); } catch (Exception e){ // ignore: tried to stop a non-existent preview } try { mCamera.setPreviewDisplay(mHolder); mCamera.startPreview(); if(context instanceof MainActivity){ ((MainActivity)context).prepareMediaPlayer(); } } catch (Exception e){ Log.d(this.getClass().getName(), "Error starting camera preview: " + e.getMessage()); e.printStackTrace(); } } } </code></pre> <p>And I am getting the following error</p> <pre><code>08-01 16:17:39.121: I/MediaRecorderJNI(29423): prepare: surface=0x202790 (identity=1681) 08-01 16:17:44.911: E/MediaRecorder(29423): start failed: -16 08-01 16:17:44.911: W/System.err(29423): java.lang.RuntimeException: start failed. 08-01 16:17:44.911: W/System.err(29423): at android.media.MediaRecorder.start(Native Method) 08-01 16:17:44.911: W/System.err(29423): at com.sample.recorder.MainActivity.startRecording(MainActivity.java:149) 08-01 16:17:44.911: W/System.err(29423): at java.lang.reflect.Method.invokeNative(Native Method) 08-01 16:17:44.911: W/System.err(29423): at java.lang.reflect.Method.invoke(Method.java:507) 08-01 16:17:44.911: W/System.err(29423): at android.view.View$1.onClick(View.java:2163) 08-01 16:17:44.911: W/System.err(29423): at android.view.View.performClick(View.java:2552) 08-01 16:17:44.911: W/System.err(29423): at android.view.View$PerformClick.run(View.java:9229) 08-01 16:17:44.911: W/System.err(29423): at android.os.Handler.handleCallback(Handler.java:587) 08-01 16:17:44.911: W/System.err(29423): at android.os.Handler.dispatchMessage(Handler.java:92) 08-01 16:17:44.911: W/System.err(29423): at android.os.Looper.loop(Looper.java:130) 08-01 16:17:44.911: W/System.err(29423): at android.app.ActivityThread.main(ActivityThread.java:3701) 08-01 16:17:44.911: W/System.err(29423): at java.lang.reflect.Method.invokeNative(Native Method) 08-01 16:17:44.911: W/System.err(29423): at java.lang.reflect.Method.invoke(Method.java:507) 08-01 16:17:44.911: W/System.err(29423): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 08-01 16:17:44.911: W/System.err(29423): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624) 08-01 16:17:44.911: W/System.err(29423): at dalvik.system.NativeStart.main(Native Method) 08-01 16:17:44.921: I/com.sample.recorder.MainActivity(29423): Media Recorder released successfully. </code></pre> <p>In that error code, 1st line is printed when the activity gets loaded, the remaining lines produced when tapping on start button which internally call the startRecording() function</p> <p>Permissions used in AndroidManifestFile</p> <pre><code>&lt;uses-permission android:name="android.permission.INTERNET" /&gt; &lt;uses-permission android:name="android.permission.CAMERA" /&gt; &lt;uses-feature android:name="android.hardware.camera" /&gt; &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt; &lt;uses-permission android:name="android.permission.RECORD_AUDIO" /&gt; &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt; &lt;uses-permission android:name="android.permission.STORAGE" /&gt; </code></pre>
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