iOS: błąd w __connection_block_invoke_2: Połączenie przerwane

Question

związane błąd

Xcode/iOS 8/AVFoundation w konsoli:

error in __connection_block_invoke_2: Connection interrupted 

jestem po prostu dodając AVCaptureVideoDataOutput do Apple próbki app 'AVCamManualUsingtheManualCaptureAPI'

Co dodałem było:

// CoreImage wants BGRA pixel format 
    NSDictionary *outputSettings = @{ (id)kCVPixelBufferPixelFormatTypeKey : [NSNumber numberWithInteger:kCVPixelFormatType_32BGRA]}; 

    // create and configure video data output 
    AVCaptureVideoDataOutput *videoDataOutput = [[AVCaptureVideoDataOutput alloc] init]; 
    videoDataOutput.videoSettings = outputSettings; 
    videoDataOutput.alwaysDiscardsLateVideoFrames = YES; 
    [videoDataOutput setSampleBufferDelegate:self queue:sessionQueue]; 

Przede fragmencie włożona do przykładowego projektu:

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; 

    self.recordButton.layer.cornerRadius = self.stillButton.layer.cornerRadius = self.cameraButton.layer.cornerRadius = 4; 
    self.recordButton.clipsToBounds = self.stillButton.clipsToBounds = self.cameraButton.clipsToBounds = YES; 

    // Create the AVCaptureSession 
    AVCaptureSession *session = [[AVCaptureSession alloc] init]; 
    [self setSession:session]; 

    // Set up preview 
    [[self previewView] setSession:session]; 

    // Check for device authorization 
    [self checkDeviceAuthorizationStatus]; 

    // In general it is not safe to mutate an AVCaptureSession or any of its inputs, outputs, or connections from multiple threads at the same time. 
    // Why not do all of this on the main queue? 
    // -[AVCaptureSession startRunning] is a blocking call which can take a long time. We dispatch session setup to the sessionQueue so that the main queue isn't blocked (which keeps the UI responsive). 

    dispatch_queue_t sessionQueue = dispatch_queue_create("session queue", DISPATCH_QUEUE_SERIAL); 
    [self setSessionQueue:sessionQueue]; 

    dispatch_async(sessionQueue, ^{ 
     [self setBackgroundRecordingID:UIBackgroundTaskInvalid]; 

     NSError *error = nil; 

     AVCaptureDevice *videoDevice = [AAPLCameraViewController deviceWithMediaType:AVMediaTypeVideo preferringPosition:AVCaptureDevicePositionBack]; 
     AVCaptureDeviceInput *videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error]; 

     if (error) 
     { 
      NSLog(@"%@", error); 
     } 

     [[self session] beginConfiguration]; 

     if ([session canAddInput:videoDeviceInput]) 
     { 
      [session addInput:videoDeviceInput]; 
      [self setVideoDeviceInput:videoDeviceInput]; 
      [self setVideoDevice:videoDeviceInput.device]; 

      dispatch_async(dispatch_get_main_queue(), ^{ 
       // Why are we dispatching this to the main queue? 
       // Because AVCaptureVideoPreviewLayer is the backing layer for our preview view and UIView can only be manipulated on main thread. 
       // Note: As an exception to the above rule, it is not necessary to serialize video orientation changes on the AVCaptureVideoPreviewLayer’s connection with other session manipulation. 

       [[(AVCaptureVideoPreviewLayer *)[[self previewView] layer] connection] setVideoOrientation:(AVCaptureVideoOrientation)[self interfaceOrientation]]; 
      }); 
     } 

     AVCaptureDevice *audioDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject]; 
     AVCaptureDeviceInput *audioDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:&error]; 

     if (error) 
     { 
      NSLog(@"%@", error); 
     } 

     if ([session canAddInput:audioDeviceInput]) 
     { 
      [session addInput:audioDeviceInput]; 
     } 

     AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init]; 
     if ([session canAddOutput:movieFileOutput]) 
     { 
      [session addOutput:movieFileOutput]; 
      AVCaptureConnection *connection = [movieFileOutput connectionWithMediaType:AVMediaTypeVideo]; 
      if ([connection isVideoStabilizationSupported]) 
      { 
       [connection setEnablesVideoStabilizationWhenAvailable:YES]; 
      } 
      [self setMovieFileOutput:movieFileOutput]; 
     } 

     AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init]; 
     if ([session canAddOutput:stillImageOutput]) 
     { 
      [stillImageOutput setOutputSettings:@{AVVideoCodecKey : AVVideoCodecJPEG}]; 
      [session addOutput:stillImageOutput]; 
      [self setStillImageOutput:stillImageOutput]; 
     } 
      // CoreImage wants BGRA pixel format 
NSDictionary *outputSettings = @{ (id)kCVPixelBufferPixelFormatTypeKey : [NSNumber numberWithInteger:kCVPixelFormatType_32BGRA]}; 

// create and configure video data output 
AVCaptureVideoDataOutput *videoDataOutput = [[AVCaptureVideoDataOutput alloc] init]; 
videoDataOutput.videoSettings = outputSettings; 
videoDataOutput.alwaysDiscardsLateVideoFrames = YES; 
[videoDataOutput setSampleBufferDelegate:self queue:sessionQueue]; 

     [[self session] commitConfiguration]; 

     dispatch_async(dispatch_get_main_queue(), ^{ 
      [self configureManualHUD]; 
     }); 
    }); 

    self.manualHUDFocusView.hidden = YES; 
    self.manualHUDExposureView.hidden = YES; 
    self.manualHUDWhiteBalanceView.hidden = YES; 
} 

otrzymuję 'Błąd w __connection_block_invoke_2: Połączenie przerwane', a także ...

-(void) captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection 

..delegate nigdy nie jest wywoływana.

Wszystko, co próbuję zrobić, to zmodyfikować kod, aby wyświetlać filtry obrazów podstawowych na żywo.

Answer 1

Naprawiłem problem.

Nie można jednocześnie używać AVCaptureMovieFileOutput i AVCaptureVideoDataOutput. Wyjąłem AVCaptureMovieFileOutput, a delegata AVCaptureVideoDataOutput zostało wywołane.