Objective-c Changing UIImagePickerController to video mode - objective-c

Question

I have an application which I want onlt to show in the background the video source from the camera. I have the following code in my viewcontroller:
#if !TARGET_IPHONE_SIMULATOR
imagePickerController = [[UIImagePickerController alloc] initWithRootViewController:self];
imagePickerController.delegate = self;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.navigationBarHidden = YES;
imagePickerController.toolbarHidden = NO;
imagePickerController.showsCameraControls = NO;
//...
[self.view addSubview:self.imagePickerController.view];
[imagePickerController viewWillAppear:YES];
[imagePickerController viewDidAppear:YES];
#endif
//...
[self.view addSubview:otherthings];
Then I add other views on top and I have sounds too. However I changed the imagepicker mode to video but it freezes when a sound plays. here's what i changed:
#if !TARGET_IPHONE_SIMULATOR
imagePickerController = [[UIImagePickerController alloc] init];//initWithRootViewController:self];
imagePickerController.delegate = self;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
NSArray *videoMediaTypesOnly = [mediaTypes filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"(SELF contains %#)", #"movie"]];
BOOL movieOutputPossible = (videoMediaTypesOnly != nil);
if (movieOutputPossible) {
imagePickerController.mediaTypes = videoMediaTypesOnly;
imagePickerController.videoQuality = UIImagePickerControllerQualityTypeHigh;
imagePickerController.navigationBarHidden = YES;
imagePickerController.toolbarHidden = YES;
imagePickerController.showsCameraControls = NO;
}
#endif
Anyone knows why the camera pickers freezes when a sound plays? The sound is an AVAudioPlayer by the way.

Answer 1

Solution: Use AVFOundation instead of UIImagePickerController.
videoBackground = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 480.0)];
AVCaptureSession *session = [[AVCaptureSession alloc] init];
session.sessionPreset = AVCaptureSessionPresetMedium;
CALayer *viewLayer = videoBackground.layer;
NSLog(#"viewLayer = %#", viewLayer);
AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
captureVideoPreviewLayer.frame = videoBackground.bounds;
[videoBackground.layer addSublayer:captureVideoPreviewLayer];
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
if (!input) {
// Handle the error appropriately.
NSLog(#"ERROR: trying to open camera: %#", error);
}
[session addInput:input];
[session startRunning];
[self.view addSubview:videoBackground];