Could not start media recorder in android for camera

Question

I am working on a video application in which I want to display a preview, and when the user presses the record button, starts recording, and when the user presses the stop button, stops recording.

I got a preview of the video on my surface, but when I press the start button, it has the error "MEDIA.RECORDER.START (Native MEthod). Here is my code. Help me guys.

@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); surfaceView = (SurfaceView) findViewById(R.id.surface_camera); surfaceHolder = surfaceView.getHolder(); surfaceHolder.addCallback(this); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); Button start =(Button)findViewById(R.id.start); Button stop =(Button)findViewById(R.id.stop); stop.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub camera.stopPreview(); stopRecording(); } }); start.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub startRecording(); } }); } @Override public void surfaceCreated(SurfaceHolder holder) { camera = Camera.open(); if (camera != null){ Camera.Parameters params = camera.getParameters(); camera.setParameters(params); } else { Toast.makeText(getApplicationContext(), "Camera not available!", Toast.LENGTH_LONG).show(); finish(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { if (previewRunning){ camera.stopPreview(); } Camera.Parameters p = camera.getParameters(); List<Camera.Size> sizes = p.getSupportedPreviewSizes(); Camera.Size cs = sizes.get(0); p.setPreviewSize(cs.width, cs.height); camera.setParameters(p); try { camera.setPreviewDisplay(holder); camera.startPreview(); previewRunning = true; } catch (IOException e) { Log.e(TAG,e.getMessage()); e.printStackTrace(); } } private MediaRecorder mediaRecorder; private final int maxDurationInMs = 20000; private final long maxFileSizeInBytes = 500000; private final int videoFramesPerSecond = 20; public boolean startRecording(){ try { camera.unlock(); mediaRecorder = new MediaRecorder(); mediaRecorder.setCamera(camera); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); mediaRecorder.setMaxDuration(maxDurationInMs); File tempFile = new File(getCacheDir(),"test.mp4"); mediaRecorder.setOutputFile(tempFile.getPath()); mediaRecorder.setVideoFrameRate(videoFramesPerSecond); mediaRecorder.setVideoSize(surfaceView.getWidth(), surfaceView.getHeight()); mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT); mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface()); mediaRecorder.setMaxFileSize(maxFileSizeInBytes); mediaRecorder.prepare(); mediaRecorder.start(); return true; } catch (IllegalStateException e) { Log.e(TAG,e.getMessage()); e.printStackTrace(); return false; } catch (IOException e) { Log.e(TAG,e.getMessage()); e.printStackTrace(); return false; } } public void stopRecording(){ mediaRecorder.stop(); camera.lock(); } @Override public void surfaceDestroyed(SurfaceHolder holder) { camera.stopPreview(); previewRunning = false; camera.release(); } 

}

Magazine

  08-31 02:20:11.781: E/MediaRecorder(14519): start failed: -19 08-31 02:20:11.781: D/AndroidRuntime(14519): Shutting down VM 08-31 02:20:11.781: W/dalvikvm(14519): threadid=1: thread exiting with uncaught exception (group=0x416c9700) 08-31 02:20:11.781: E/AndroidRuntime(14519): FATAL EXCEPTION: main 08-31 02:20:11.781: E/AndroidRuntime(14519): java.lang.RuntimeException: start failed. 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.media.MediaRecorder.start(Native Method) 08-31 02:20:11.781: E/AndroidRuntime(14519): at com.example.cameratest.MainActivity.startRecording(MainActivity.java:135) 08-31 02:20:11.781: E/AndroidRuntime(14519): at com.example.cameratest.MainActivity$2.onClick(MainActivity.java:61) 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.view.View.performClick(View.java:4240) 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.view.View$PerformClick.run(View.java:17721) 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.os.Handler.handleCallback(Handler.java:730) 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.os.Handler.dispatchMessage(Handler.java:92) 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.os.Looper.loop(Looper.java:137) 08-31 02:20:11.781: E/AndroidRuntime(14519): at android.app.ActivityThread.main(ActivityThread.java:5103) 08-31 02:20:11.781: E/AndroidRuntime(14519): at java.lang.reflect.Method.invokeNative(Native Method) 08-31 02:20:11.781: E/AndroidRuntime(14519): at java.lang.reflect.Method.invoke(Method.java:525) 08-31 02:20:11.781: E/AndroidRuntime(14519): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 08-31 02:20:11.781: E/AndroidRuntime(14519): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 08-31 02:20:11.781: E/AndroidRuntime(14519): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

I found this solution and its work is excellent for me and solved this problem :)

for 2.3+ android:

Just change:

 mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH)); 

in

 mediaRecorder.setProfile(CamcorderProfile.get(CameraID,CamcorderProfile.QUALITY_HIGH)); 

Answer 2

in your startRecording method, try to lock the camera before unlocking it:

 mediaRecorder = new MediaRecorder(); camera.lock(); camera.unlock(); 

Answer 3

comment on this line of code

 mediaRecorder.setVideoSize(surfaceView.getWidth(), surfaceView.getHeight()); 

Answer 4

I solved the error with the start-up error -19 by changing the videoFramesPerSecond value to 30., which is the recommended value for QUALITY_1080p - Quality level corresponding to 1080p (1920 x 1080) and QUALITY_480P - Quality level corresponding to 480p (720 x 480).

source: http://developer.android.com/guide/appendix/media-formats.html

Answer 5

Try the following: this will help: help someone:

  try { mediaRecorder.prepare(); Thread.sleep(1000); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } mediaRecorder.start(); 

An incoming call takes time to prepare.

Hold the preparation for 1 second and everything will work well.

Answer 6

It can be a lot harder than you think. Android has done a great job of working on something as simple as recording and returning a video using Intents ...

Recording video using the camera app A way to delegate actions in other Android apps is to call an intent that describes what you want to do. This includes three parts: the intention itself, the call to start external activity, and some code to process the video when the focus returns to your activity.

Here is the function that causes the intention to capture the video.

 private void dispatchTakeVideoIntent() { Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); startActivityForResult(takeVideoIntent, ACTION_TAKE_VIDEO); } 

Watching a video The Android Camera application returns the video in the Intent passed to onActivityResult () as a Uri indicating the location of the video in the store. The following code retrieves this video and displays it in a VideoView.

 private void handleCameraVideo(Intent intent) { mVideoUri = intent.getData(); mVideoView.setVideoURI(mVideoUri); } 

Add this to the manifest

 <uses-feature android:name="android.hardware.camera" /> 

source: http://developer.android.com/training/camera/videobasics.html