iOS：错误__connection_block_invoke_2：连接中断
控制台中的Xcode / iOS 8 / AVFoundation相关的错误：
error in __connection_block_invoke_2: Connection interrupted 我只是将AVCaptureVideoDataOutput添加到苹果的示例应用程序“AVCamManualUsingtheManualCaptureAPI”
我补充说的是：
// 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];
上面的代码插入到示例项目中：
- (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; }
我得到'错误__connection_block_invoke_2：连接中断'，也…
-(void) captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
..delegate永远不会被调用。
所有我想要做的是修改他们的代码做活的核心图像filter。
所以我解决了这个问题。
您不能同时使用AVCaptureMovieFileOutput和AVCaptureVideoDataOutput 。 我拿出AVCaptureMovieFileOutput ，并调用AVCaptureVideoDataOutput委托。