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    <p>Solved! Perhaps it is the sequence of acions on initializing the session. This one works for me:</p> <pre><code>NSError *error = nil; if(session) [session release]; // Create the session session = [[AVCaptureSession alloc] init]; // Configure the session to produce lower resolution video frames, if your // processing algorithm can cope. We'll specify medium quality for the // chosen device. session.sessionPreset = AVCaptureSessionPresetMedium; // Find a suitable AVCaptureDevice AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; // Create a device input with the device and add it to the session. AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&amp;error]; if (!input) { // Handling the error appropriately. } [session addInput:input]; // Create a VideoDataOutput and add it to the session AVCaptureVideoDataOutput *output = [[[AVCaptureVideoDataOutput alloc] init] autorelease]; [session addOutput:output]; // Configure your output. dispatch_queue_t queue = dispatch_queue_create("myQueue", NULL); [output setSampleBufferDelegate:self queue:queue]; dispatch_release(queue); // Specify the pixel format output.videoSettings = [NSDictionary dictionaryWithObject: [NSNumber numberWithInt:kCVPixelFormatType_32BGRA] forKey:(id)kCVPixelBufferPixelFormatTypeKey]; // If you wish to cap the frame rate to a known value, such as 15 fps, set // minFrameDuration. output.minFrameDuration = CMTimeMake(1, 15); previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session]; [delegate layerArrived:previewLayer]; NSNotificationCenter *notify = [NSNotificationCenter defaultCenter]; [notify addObserver: self selector: @selector(onVideoError:) name: AVCaptureSessionRuntimeErrorNotification object: session]; [notify addObserver: self selector: @selector(onVideoStart:) name: AVCaptureSessionDidStartRunningNotification object: session]; [notify addObserver: self selector: @selector(onVideoStop:) name: AVCaptureSessionDidStopRunningNotification object: session]; [notify addObserver: self selector: @selector(onVideoStop:) name: AVCaptureSessionWasInterruptedNotification object: session]; [notify addObserver: self selector: @selector(onVideoStart:) name: AVCaptureSessionInterruptionEndedNotification object: session]; // Start the session running to start the flow of data [session startRunning]; </code></pre> <p>Btw this sequence seems to resolve the synchronous notifications problem :)</p>
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    1. POHow to properly release an AVCaptureSession
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    1. COI'm sorry but this doesn't make any difference. It still crashes. And how is to supposed to resolve the notification problem? Is the notification now delayed until the second thread has finished? In the mean time, I've found a solution that works for me (see my own answer).
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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