AVCaptureVideoPreviewLayer not filling screen

Question

I read about one million threads about how to make a VideoPreviewLayer filling the complete screen of an iPhone but nothing works ... maybe you can help me because I'm really stuck.

This is my Preview layer init:

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {     // Choosing bigger preset for bigger screen.     _sessionPreset = AVCaptureSessionPreset1280x720; } else {     _sessionPreset = AVCaptureSessionPresetHigh; }  [self setupAVCapture];  AVCaptureSession *captureSession = _session; AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:captureSession]; UIView *aView = self.view; previewLayer.frame = aView.bounds; previewLayer.connection.videoOrientation = AVCaptureVideoOrientationLandscapeRight; [aView.layer addSublayer:previewLayer]; 

That's my setupAvCapture Method:

  //-- Setup Capture Session. _session = [[AVCaptureSession alloc] init]; [_session beginConfiguration];  //-- Set preset session size. [_session setSessionPreset:_sessionPreset];  //-- Creata a video device and input from that Device.  Add the input to the capture session. AVCaptureDevice * videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if(videoDevice == nil)     assert(0);  //-- Add the device to the session. NSError *error; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error]; if(error)     assert(0);  [_session addInput:input];  //-- Create the output for the capture session. AVCaptureVideoDataOutput * dataOutput = [[AVCaptureVideoDataOutput alloc] init]; [dataOutput setAlwaysDiscardsLateVideoFrames:YES]; // Probably want to set this to NO when recording  //-- Set to YUV420. [dataOutput setVideoSettings:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarFullRange]                                                          forKey:(id)kCVPixelBufferPixelFormatTypeKey]]; // Necessary for manual preview  // Set dispatch to be on the main thread so OpenGL can do things with the data [dataOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];  [_session addOutput:dataOutput]; [_session commitConfiguration];  [_session startRunning]; 

I already tried to use different AVCaptureSessionPresets and ResizeFit options. But it always looks like this:

http://imageshack.us/photo/my-images/707/img0013g.png/

Or this if I use previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; If I log the size of the layer the correct full screen size is returned.

http://imageshack.us/photo/my-images/194/img0014k.png/

Answer 1

try:

AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession: self.session]; [captureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill]; 

Swift Update

let previewLayer = AVCaptureVideoPreviewLayer(session: session) previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill 

Swift 4.0 Update

let previewLayer = AVCaptureVideoPreviewLayer(session: session) previewLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill 

Answer 2

In case someone have this issue you need just to take the bounds of screen

    previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)     previewLayer.frame = UIScreen.main.bounds     previewLayer.videoGravity = .resizeAspectFill     camPreview.layer.addSublayer(previewLayer)