AVCaptureSession With STT(Speech to text) - iphone

Question

I am using AVCapture Session to record video same time i am using STT(google Speech to text api) to convert voice into text. I have facing a problem when I click on the speak button then camera get freezes. Any correct answer will be acceptable. Thanks in advance .
To start camera in
-(void)viewDidLoad;
if ([[self captureManager] setupSession]) {
// Create video preview layer and add it to the UI
AVCaptureVideoPreviewLayer *newCaptureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[[self captureManager] session]];
UIView *view = [self videoPreviewView];
CALayer *viewLayer = [view layer];
[viewLayer setMasksToBounds:YES];
CGRect bounds = [view bounds];
[newCaptureVideoPreviewLayer setFrame:bounds];
if ([newCaptureVideoPreviewLayer isOrientationSupported]) {
[newCaptureVideoPreviewLayer setOrientation:AVCaptureVideoOrientationLandscapeLeft|AVCaptureVideoOrientationLandscapeRight];
}
[newCaptureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
[viewLayer insertSublayer:newCaptureVideoPreviewLayer below:[[viewLayer sublayers] objectAtIndex:0]];
[self setCaptureVideoPreviewLayer:newCaptureVideoPreviewLayer];
[newCaptureVideoPreviewLayer release];
// Start the session. This is done asychronously since -startRunning doesn't return until the session is running.
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[[[self captureManager] session] startRunning];
});
[self updateButtonStates];
}
- (BOOL) setupSession
{
BOOL success = NO;
// Set torch and flash mode to auto
if ([[self backFacingCamera] hasFlash]) {
if ([[self backFacingCamera] lockForConfiguration:nil]) {
if ([[self backFacingCamera] isFlashModeSupported:AVCaptureFlashModeAuto]) {
[[self backFacingCamera] setFlashMode:AVCaptureFlashModeAuto];
}
[[self backFacingCamera] unlockForConfiguration];
}
}
if ([[self backFacingCamera] hasTorch]) {
if ([[self backFacingCamera] lockForConfiguration:nil]) {
if ([[self backFacingCamera] isTorchModeSupported:AVCaptureTorchModeAuto]) {
[[self backFacingCamera] setTorchMode:AVCaptureTorchModeAuto];
}
[[self backFacingCamera] unlockForConfiguration];
}
}
// Init the device inputs
AVCaptureDeviceInput *newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self frontFacingCamera] error:nil];
AVCaptureDeviceInput *newAudioInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self audioDevice] error:nil];
// Setup the still image file output
AVCaptureStillImageOutput *newStillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:
AVVideoCodecJPEG, AVVideoCodecKey,
nil];
[newStillImageOutput setOutputSettings:outputSettings];
[outputSettings release];
// Create session (use default AVCaptureSessionPresetHigh)
AVCaptureSession *newCaptureSession = [[AVCaptureSession alloc] init];
// Add inputs and output to the capture session
if ([newCaptureSession canAddInput:newVideoInput]) {
[newCaptureSession addInput:newVideoInput];
}
if ([newCaptureSession canAddInput:newAudioInput]) {
[newCaptureSession addInput:newAudioInput];
}
if ([newCaptureSession canAddOutput:newStillImageOutput]) {
[newCaptureSession addOutput:newStillImageOutput];
}
[self setStillImageOutput:newStillImageOutput];
[self setVideoInput:newVideoInput];
[self setAudioInput:newAudioInput];
[self setSession:newCaptureSession];
[newStillImageOutput release];
[newVideoInput release];
[newAudioInput release];
[newCaptureSession release];
// Set up the movie file output
NSURL *outputFileURL = [self tempFileURL];
AVCamRecorder *newRecorder = [[AVCamRecorder alloc] initWithSession:[self session] outputFileURL:outputFileURL];
[newRecorder setDelegate:self];
// Send an error to the delegate if video recording is unavailable
if (![newRecorder recordsVideo] && [newRecorder recordsAudio]) {
NSString *localizedDescription = NSLocalizedString(#"Video recording unavailable", #"Video recording unavailable description");
NSString *localizedFailureReason = NSLocalizedString(#"Movies recorded on this device will only contain audio. They will be accessible through iTunes file sharing.", #"Video recording unavailable failure reason");
NSDictionary *errorDict = [NSDictionary dictionaryWithObjectsAndKeys:
localizedDescription, NSLocalizedDescriptionKey,
localizedFailureReason, NSLocalizedFailureReasonErrorKey,
nil];
NSError *noVideoError = [NSError errorWithDomain:#"AVCam" code:0 userInfo:errorDict];
if ([[self delegate] respondsToSelector:#selector(captureManager:didFailWithError:)]) {
[[self delegate] captureManager:self didFailWithError:noVideoError];
}
}
[self setRecorder:newRecorder];
[newRecorder release];
success = YES;
return success;
}