avfoundation

How can I detect when the user press the expand icon of the AVPlayerViewController? I want to know when the movie playing is entering the fullscreen mode. It is also possible to observe bounds of playerViewController.contentOverlayView and compare that to [UIScreen mainScreen].bounds , e.g.: self.playerViewController = [AVPlayerViewController new]; // do this after adding player VC as a child VC or in completion block of -presentViewController:animated:completion: [self.playerViewController.contentOverlayView addObserver:self forKeyPath:@"bounds" options:NSKeyValueObservingOptionNew |

I'm writing an iPhone App which uses AVFoundation to take a photo and crop it. The App is similar to a QR code reader: It uses a AVCaptureVideoPreviewLayer with an overlay. The overlay has a square. I want to crop the image so the cropped image is exactly what the user has places inside the square. The preview layer has gravity AVLayerVideoGravityResizeAspectFill. It looks like what the camera actually captures is not exactly what the user sees in the preview layer. This means that I need to move from the preview coordinate system to the captured image coordinate system so I can crop the image

I want to know when my AVAudioRecorder is inaccessible (e.g when music starts playing). As audioRecorderEndInterruption will be deprecated with iOS 9 I am focusing on AVAudioSession 's interruption notification (but neither is working as expected). The issue is that the interruption notification is never called if the app was and remains in the foreground when the interruption occurs. E.g: The user starts and stops playing music without moving the application into the background. To detect any interruptions I am using: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector

I had the need to capture a still image from the front facing camera and store it in the Documents directory. I found bits and pieces of code on other posts, but wanted to share this in case others have a similar need. Define a UIImage property and make sure your class implements the AVCaptureVideoDataOutputSampleBufferDelegate protocol: @interface ViewController : UIViewController <AVCaptureVideoDataOutputSampleBufferDelegate> @property (nonatomic, strong) UIImage *theImage; @end In viewDidLoad or something appropriate, add this: [self captureImage]; Implement the following methods: - (void

I'am creating a video from an array of images. The purpose of my work is to create a .mov video with no compression. I have see in developer library that it exist a key "AVVideoCompressionPropertiesKey" but I don't know how to specify no compression with this key. Could you help me please? Here is my sample code : NSDictionary *videoCleanApertureSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:320], AVVideoCleanApertureWidthKey, [NSNumber numberWithInt:480], AVVideoCleanApertureHeightKey, [NSNumber numberWithInt:10], AVVideoCleanApertureHorizontalOffsetKey,

IMPORTANT: if I use: session.sessionPreset = AVCaptureSessionPresetHigh; my preview image is not stretched !! If I save the photo to the device UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil); the image is normal, only in the preview it is stretched. I m using AVFoundation to capture photo. session = [[AVCaptureSession alloc] init]; session.sessionPreset = AVCaptureSessionPresetHigh; CALayer *viewLayer = vImagePreview.layer; NSLog(@"viewLayer = %@", viewLayer); AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];

Let me see if I understood it correctly. At the present most advanced hardware, iOS allows me to record at the following fps: 30, 60, 120 and 240. But these fps behave differently. If I shoot at 30 or 60 fps, I expect the videos files created from shooting at these fps to play at 30 and 60 fps respectively. But if I shoot at 120 or 240 fps, I expect the video files creating from shooting at these fps to play at 30 fps, or I will not see the slow motion. A few questions: am I right? is there a way to shoot at 120 or 240 fps and play at 120 and 240 fps respectively? I mean play at the fps the