avfoundation

I'm trying to get video thumbnails with the following code: let asset = AVAsset(URL: url) let imageGenerator = AVAssetImageGenerator(asset: asset) imageGenerator.appliesPreferredTrackTransform = true do { let cgImage = try imgGenerator.copyCGImageAtTime(CMTimeMake(1, 30), actualTime: nil) let uiImage = UIImage(CGImage: cgImage) imageview.image = uiImage } catch let error as NSError { print("Image generation failed with error \(error)") } Sometimes it works and sometime it doesn't showing the following error: Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed

Trying to get a simple Proof of concept going with Apple's face detection API. I've looked at a couple of other examples including Apple's SquareCam, and this one https://github.com/jeroentrappers/FaceDetectionPOC based on these, it seems like I am following the correct pattern to get the APIs going, but I am stuck. No matter what I do, the CIDetector for my face detector is always nil!!! I would seriously appreciate any help, clues - hints - suggestions! -(void)initCamera{ session = [[AVCaptureSession alloc]init]; AVCaptureDevice *device; /* if([self frontCameraAvailable]){ device = [self

I need to apply the reverb filter to my sound file in my ipad app. I just found a keyword AVMetadataID3MetadataKeyReverb in the apple documentation, but not able to get how to use it. This has been added from iOS 4.0. The AVMetadataID3MetadataKeyReverb constant represents the RVRB field of and ID3(V2) tag - which is simply a piece of metadata that's part of an audio container file (like MP3). The constant isn't related to applying an actual reverb effect to a piece of audio data, but to identifying different parts of ID3 tags when using the AV Foundation to retreive them from an audio file...

I have a project that currently uses the H.264 encoder to record video on iOS. I wanted to try using the new HEVC encoder in iOS 11 to reduce file sizes, but have found that using the HEVC encoder causes file sizes to balloon enormously. Here's a project on GitHub that shows the issue - it simultaneously writes frames from the camera to files using the H.264 and H.265 (HEVC) encoders, and the resulting file sizes are printed to the console. The AVFoundation classes are setup like this: class VideoWriter { var avAssetWriterInput: AVAssetWriterInput var avAssetWriter: AVassetWriter init() { if

I am trying to use AVVideoComposition to add some text on top of a video and save the video. This is the code I use: I Create an AVMutableComposition and AVVideoComposition var mutableComp = AVMutableComposition() var mutableVidComp = AVMutableVideoComposition() var compositionSize : CGSize? func configureAsset(){ let options = [AVURLAssetPreferPreciseDurationAndTimingKey : "true"] let videoAsset = AVURLAsset(url: Bundle.main.url(forResource: "Car", withExtension: "mp4")! , options : options) let videoAssetSourceTrack = videoAsset.tracks(withMediaType: AVMediaTypeVideo).first! as AVAssetTrack