avfoundation

I have been looking into this for way too long now. I am trying to get MacOS webcam data and run CIDetect on the frames that the webcam outputs. I know I need to: connect AVCaptureDevice (as in input to) into AVCaptureSession connect AVCaptureVideoDataOutput (as an output to) into AVCaptureSession call .setSampleBufferDelegate(AVCaptureVideoDataOutputSampleBufferDelegate, DelegateQueue) For some reason, after calling .setSampleBufferDelegate(...) (and of course after calling .startRunning() on the AVCaptureSession instance), my AVCaptureVideoDataOutputSampleBufferDelegate 's captureOutput is

My current setup is as follows (based on the ColorTrackingCamera project from Brad Larson ): I'm using a AVCaptureSession set to AVCaptureSessionPreset640x480 for which I let the output run through an OpenGL scene as a texture. This texture is then manipulated by a fragment shader. I'm in need of this "lower quality" preset because I want to preserve a high framerate when the user is previewing. I then want to switch to a higher quality output when the user captures a still photo. First I thought I could change the sessionPreset on the AVCaptureSession but this forces the camera to refocus

I am trying to play the recorded content simultaneously while recording. Currently I am using AVAudioRecorder for recording and AVAudioPlayer for playing. When I was trying to play the content simultaneously nothing is playing. Please find the pseudo code for what I am doing. If I do the same stuff after stop the recording everything works fine. AVAudioRecorder *recorder; //Initializing the recorder properly. [recorder record]; NSError *error=nil; NSUrl recordingPathUrl; //Contains the recording path. AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordingPathUrl

Once the default iPhone Camera app takes a photo, a preview appears and the image animates to the camera roll button. I am trying to replicate this animation. session = [[AVCaptureSession alloc] init]; session.sessionPreset = AVCaptureSessionPresetPhoto; CALayer *viewLayer = self.vImagePreview.layer; NSLog(@"viewLayer = %@", viewLayer); captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session]; captureVideoPreviewLayer.frame = CGRectMake(0, 0, 322, 425); [self.vImagePreview.layer addSublayer:captureVideoPreviewLayer]; device = [AVCaptureDevice