Probably the most performant way of handling this would be to use OpenGL ES for filtering and display of these video frames. You won’t be able to do much with an AVCaptureVideoPreviewLayer directly, aside from adjusting its opacity when overlaid with another view or layer. I have a sample application here where I grab frames … Read more
I figured it out but Apple didn’t make it so obvious. The callback function from the delegate AVCaptureMetadataOutputObjectsDelegate has been renamed and the parameter names are different! So, replace func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) to func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) My view controller is now … Read more
AVCaptureSession Sample import UIKit import AVFoundation class ViewController: UIViewController { let captureSession = AVCaptureSession() let stillImageOutput = AVCaptureStillImageOutput() var error: NSError? override func viewDidLoad() { super.viewDidLoad() let devices = AVCaptureDevice.devices().filter{ $0.hasMediaType(AVMediaTypeVideo) && $0.position == AVCaptureDevicePosition.Back } if let captureDevice = devices.first as? AVCaptureDevice { captureSession.addInput(AVCaptureDeviceInput(device: captureDevice, error: &error)) captureSession.sessionPreset = AVCaptureSessionPresetPhoto captureSession.startRunning() stillImageOutput.outputSettings = [AVVideoCodecKey:AVVideoCodecJPEG] … Read more
Here’s a shorter version you can now use to turn the light on or off: AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if ([device hasTorch]) { [device lockForConfiguration:nil]; [device setTorchMode:AVCaptureTorchModeOn]; // use AVCaptureTorchModeOff to turn off [device unlockForConfiguration]; } UPDATE: (March 2015) With iOS 6.0 and later, you can control the brightness or level of the torch … Read more
In Swift 3: private func cropToPreviewLayer(originalImage: UIImage) -> UIImage { let outputRect = previewLayer.metadataOutputRectConverted(fromLayerRect: previewLayer.bounds) var cgImage = originalImage.cgImage! let width = CGFloat(cgImage.width) let height = CGFloat(cgImage.height) let cropRect = CGRect(x: outputRect.origin.x * width, y: outputRect.origin.y * height, width: outputRect.size.width * width, height: outputRect.size.height * height) cgImage = cgImage.cropping(to: cropRect)! let croppedUIImage = UIImage(cgImage: cgImage, … Read more
Take a look at the header AVCaptureSession.h. There is a definition for an enum called AVCaptureVideoOrientation that defines various video orientations. On the AVCaptureConnection object there is a property called videoOrientation that is a AVCaptureVideoOrientation. You should be able to set this to change the orientation of the video. You probably want AVCaptureVideoOrientationLandscapeRight or AVCaptureVideoOrientationLandscapeLeft. … Read more
You first need to remove the existing AVCameraInput from the AVCaptureSession and then add a new AVCameraInput to the AVCaptureSession. The following works for me (under ARC): -(IBAction)switchCameraTapped:(id)sender { //Change camera source if(_captureSession) { //Indicate that some changes will be made to the session [_captureSession beginConfiguration]; //Remove existing input AVCaptureInput* currentCameraInput = [_captureSession.inputs objectAtIndex:0]; [_captureSession … Read more
Swift 5.5, Xcode 13.2 private func updatePreviewLayer(layer: AVCaptureConnection, orientation: AVCaptureVideoOrientation) { layer.videoOrientation = orientation self.previewLayer?.frame = view.bounds } override func viewDidLayoutSubviews() { super.viewDidLayoutSubviews() if let connection = self.previewLayer?.connection { let currentDevice = UIDevice.current let orientation: UIDeviceOrientation = currentDevice.orientation let previewLayerConnection: AVCaptureConnection = connection if previewLayerConnection.isVideoOrientationSupported { switch orientation { case .portrait: self.updatePreviewLayer(layer: previewLayerConnection, orientation: .portrait) … Read more
A CMTime struct represents a length of time that is stored as rational number (see CMTime Reference). CMTime has a value and a timescale field, and represents the time value/timescale seconds . CMTimeMake is a function that returns a CMTime structure, for example: CMTime t1 = CMTimeMake(1, 10); // 1/10 second = 0.1 second CMTime … Read more