Overlay changes color in HDR video When I’m using trying to add an overlay to an image with AVMutableVideoComposition, When the video is in HDR the overlay colors are changing and white becomes grey screen shot from original HDR video result from the code with the wrong overlay colorthe result when reducing to SDR (the right overlay color) the distorted colorsthe way it should look(sdr) Im creating the overlay with a CGContext class CustomHdrCompositor: NSObject, AVVideoCompositing { private let coreImageContext = CIContext(options: [CIContextOption.cacheIntermediates: false]) let combinedFilter = CIFilter(name: "CISourceOverCompositing")! var sourcePixelBufferAttributes: [String: Any]? = [String(kCVPixelBufferPixelFormatTypeKey): [kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange]] var requiredPixelBufferAttributesForRenderContext: [String: Any] = [String(kCVPixelBufferPixelFormatTypeKey): [kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange]] var supportsWideColorSourceFrames = true var supportsHDRSourceFrames = true func renderContextChanged(_ newRenderContext: AVVideoCompositionRenderContext) { return } func startRequest(_ request: AVAsynchronousVideoCompositionRequest) { guard let outputPixelBuffer = request.renderContext.newPixelBuffer() else { print("No valid pixel buffer found. Returning.") request.finish(with: CustomCompositorError.ciFilterFailedToProduceOutputImage) return } guard let requiredTrackIDs = request.videoCompositionInstruction.requiredSourceTrackIDs, !requiredTrackIDs.isEmpty else { print("No valid track IDs found in composition instruction.") return } let sourceCount = requiredTrackIDs.count if sourceCount > 1 { request.finish(with: CustomCompositorError.notSupportingMoreThanOneSources) return } if sourceCount == 1 { let sourceID = requiredTrackIDs[0] let sourceBuffer = request.sourceFrame(byTrackID: sourceID.value(of: Int32.self)!)! let sourceCIImage = CIImage(cvPixelBuffer: sourceBuffer) var textImage = TextLayerPlayer.instance.getTextLayerAtTimesStamp(ts:request.compositionTime.seconds) combinedFilter.setValue(textImage, forKey: "inputImage") if let outputImage = combinedFilter.outputImage { let renderDestination = CIRenderDestination(pixelBuffer: outputPixelBuffer) do { try coreImageContext.startTask(toRender: outputImage, to: renderDestination) } catch { } } } request.finish(withComposedVideoFrame: outputPixelBuffer) } } func regularCompositionHdr(asset: AVAsset) -> AVVideoComposition { self.isHdr = checkHdr(asset: asset) let avComposition = AVMutableComposition() let composition = AVMutableVideoComposition() composition.colorPrimaries = AVVideoColorPrimaries_ITU_R_2020 composition.colorTransferFunction = AVVideoTransferFunction_ITU_R_2100_HLG composition.colorYCbCrMatrix = AVVideoYCbCrMatrix_ITU_R_2020 composition.renderSize = assetSize composition.frameDuration = CMTime(value: 1, timescale: 30) composition.customVideoCompositorClass = CustomHdrCompositor.self composition.perFrameHDRDisplayMetadataPolicy = .propagate return composition } I’m using this function to transfer the transparent CGImage to CIImage that supports HDR func convertToHDRCIImage(from cgImage: CGImage, maxBrightness: CGFloat = 3.0) -> CIImage? { // Create a CIImage from the input CGImage let baseImage = CIImage(cgImage: cgImage) // Create HDR color adjustment filter let colorAdjust = CIFilter(name: "CIColorMatrix")! colorAdjust.setValue(baseImage, forKey: kCIInputImageKey) // Calculate HDR multipliers based on maxBrightness // This will maintain color ratios while increasing brightness colorAdjust.setValue(CIVector(x: maxBrightness, y: 0, z: 0, w: 0), forKey: "inputRVector") colorAdjust.setValue(CIVector(x: 0, y: maxBrightness, z: 0, w: 0), forKey: "inputGVector") colorAdjust.setValue(CIVector(x: 0, y: 0, z: maxBrightness, w: 0), forKey: "inputBVector") // Maintain alpha channel colorAdjust.setValue(CIVector(x: 0, y: 0, z: 0, w: 1), forKey: "inputAVector") guard let adjustedImage = colorAdjust.outputImage else { return nil } // Apply color space transformation using CIImage's colorSpace property let transformedImage = adjustedImage.matchedFromWorkingSpace(to: hdrWorkingSpace)! // Create context with HDR color space let context = CIContext(options: [ .workingColorSpace: hdrColorSpace, .outputColorSpace: hdrColorSpace ]) // Get the image bounds let bounds = transformedImage.extent // Create a new pixel buffer with HDR format var pixelBuffer: CVPixelBuffer? let pixelBufferAttributes = [ kCVPixelBufferPixelFormatTypeKey: kCVPixelFormatType_64RGBAHalf, kCVPixelBufferMetalCompatibilityKey: true ] as CFDictionary CVPixelBufferCreate(kCFAllocatorDefault, Int(bounds.width), Int(bounds.height), kCVPixelFormatType_64RGBAHalf, pixelBufferAttributes, &pixelBuffer) guard let destinationBuffer = pixelBuffer else { return nil } context.render(transformedImage, to: destinationBuffer, bounds: bounds, colorSpace: hdrColorSpace) // Create final CIImage from the HDR pixel buffer let finalImage = CIImage(cvPixelBuffer: destinationBuffer, options: [.colorSpace: hdrColorSpace]) return finalImage } When reducing the HDR to SDR it keeps the right color of the overlay with, but than it reduces the HDR effect which I want to keep

Hey - I am developing an app that uses the camera for recording video. I put the ability to choose a framerate and resolution and all combinations work perfectly fine, except for 4k 120fps for the new iPhone 16 pro. This just shows black on the preview. I tried to record even though the preview was black, but the recording is also just a black screen. Is there anything special that needs to be done in the camera setup for 4k 120fps to work? I have my camera setup code attached. Is it possible this is a bug in Apple's code, since this works with every other combination (1080p up to 240fps and 4k up to 60fps)? Thanks so much for the help. class CameraManager: NSObject { enum Errors: Error { case noCaptureDevice case couldNotAddInput case unsupportedConfiguration } enum Resolution { case hd1080p case uhd4K var preset: AVCaptureSession.Preset { switch self { case .hd1080p: return .hd1920x1080 case .uhd4K: return .hd4K3840x2160 } } var dimensions: CMVideoDimensions { switch self { case .hd1080p: return CMVideoDimensions(width: 1920, height: 1080) case .uhd4K: return CMVideoDimensions(width: 3840, height: 2160) } } } enum CameraType { case wide case ultraWide var captureDeviceType: AVCaptureDevice.DeviceType { switch self { case .wide: return .builtInWideAngleCamera case .ultraWide: return .builtInUltraWideCamera } } } enum FrameRate: Int { case fps60 = 60 case fps120 = 120 case fps240 = 240 } let orientationManager = OrientationManager() let captureSession: AVCaptureSession let previewLayer: AVCaptureVideoPreviewLayer let movieFileOutput = AVCaptureMovieFileOutput() let videoDataOutput = AVCaptureVideoDataOutput() private var videoCaptureDevice: AVCaptureDevice? override init() { self.captureSession = AVCaptureSession() self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession) super.init() self.previewLayer.videoGravity = .resizeAspect } func configureSession(resolution: Resolution, frameRate: FrameRate, stabilizationEnabled: Bool, cameraType: CameraType, sampleBufferDelegate: AVCaptureVideoDataOutputSampleBufferDelegate?) throws { assert(Thread.isMainThread) captureSession.beginConfiguration() defer { captureSession.commitConfiguration() } captureSession.sessionPreset = resolution.preset if captureSession.canAddOutput(movieFileOutput) { captureSession.addOutput(movieFileOutput) } else { throw Errors.couldNotAddInput } videoDataOutput.setSampleBufferDelegate(sampleBufferDelegate, queue: DispatchQueue(label: "VideoDataOutputQueue")) if captureSession.canAddOutput(videoDataOutput) { captureSession.addOutput(videoDataOutput) // Set the video orientation if needed if let connection = videoDataOutput.connection(with: .video) { //connection.videoOrientation = .portrait } } else { throw Errors.couldNotAddInput } guard let videoCaptureDevice = AVCaptureDevice.default(cameraType.captureDeviceType, for: .video, position: .back) else { throw Errors.noCaptureDevice } let useDimensions = resolution.dimensions guard let format = videoCaptureDevice.formats.first(where: { format in let dimensions = CMVideoFormatDescriptionGetDimensions(format.formatDescription) let isRes = dimensions.width == useDimensions.width && dimensions.height == useDimensions.height let frameRates = format.videoSupportedFrameRateRanges return isRes && frameRates.contains(where: { $0.maxFrameRate >= Float64(frameRate.rawValue) }) }) else { throw Errors.unsupportedConfiguration } self.videoCaptureDevice = videoCaptureDevice do { let videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice) if captureSession.canAddInput(videoInput) { captureSession.addInput(videoInput) } else { throw Errors.couldNotAddInput } try videoCaptureDevice.lockForConfiguration() videoCaptureDevice.activeFormat = format videoCaptureDevice.activeVideoMinFrameDuration = CMTime(value: 1, timescale: CMTimeScale(frameRate.rawValue)) videoCaptureDevice.activeVideoMaxFrameDuration = CMTime(value: 1, timescale: CMTimeScale(frameRate.rawValue)) videoCaptureDevice.activeMaxExposureDuration = CMTime(seconds: 1.0 / 960, preferredTimescale: 1000000) videoCaptureDevice.exposureMode = .locked videoCaptureDevice.unlockForConfiguration() } catch { throw error } configureStabilization(enabled: stabilizationEnabled) }`

Hello there, I need to move through video loaded in an AVPlayer one frame at a time back or forth. For that I tried to use AVPlayerItem's method step(byCount:) and it works just fine. However I need to know when stepping happened and as far as I observed it is not immediate using the method. If I check the currentTime() just after calling the method it's the same and if I do it slightly later (depending of the video itself) it shows the correct "jumped" time. To achieve my goal I tried subclassing AVPlayerItem and implement my own async method utilizing NotificationCenter and the timeJumpedNotification assuming it would deliver it as the time actually jumps but it's not the case. Here is my "stripped" and simplified version of the custom Player Item: import AVFoundation final class PlayerItem: AVPlayerItem { private var jumpCompletion: ( (CMTime) -> () )? override init(asset: AVAsset, automaticallyLoadedAssetKeys: [String]?) { super .init(asset: asset, automaticallyLoadedAssetKeys: automaticallyLoadedAssetKeys) NotificationCenter.default.addObserver(self, selector: #selector(timeDidChange(_:)), name: AVPlayerItem.timeJumpedNotification, object: self) } deinit { NotificationCenter.default.removeObserver(self, name: AVPlayerItem.timeJumpedNotification, object: self) jumpCompletion = nil } @discardableResult func step(by count: Int) async -> CMTime { await withCheckedContinuation { continuation in step(by: count) { time in continuation.resume(returning: time) } } } func step(by count: Int, completion: @escaping ( (CMTime) -> () )) { guard jumpCompletion == nil else { completion(currentTime()) return } jumpCompletion = completion step(byCount: count) } @objc private func timeDidChange(_ notification: Notification) { switch notification.name { case AVPlayerItem.timeJumpedNotification where notification.object as? AVPlayerItem [==](https://www.example.com/) self: jumpCompletion?(currentTime()) jumpCompletion = nil default: return } } } In short the notification never gets called thus the above is not working. I guess the key there is that in the docs about the timeJumpedNotification: is said: "A notification the system posts when a player item’s time changes discontinuously." so the step(byCount:) is not considered as discontinuous operation and doesn't trigger it. I'd be really helpful if somebody can help as I don't want to use seek(to:toleranceBefore:toleranceAfter:) mainly cause it's not accurate in terms of the exact next/previous frame as the video might have VFR and that causes repeating frames sometimes or even skipping one or another. Thanks a lot

I’m experiencing a crash at runtime when trying to extract audio from a video. This issue occurs on both iOS 18 and earlier versions. The crash is caused by the following error: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '*** -[AVAssetExportSession exportAsynchronouslyWithCompletionHandler:] Cannot call exportAsynchronouslyWithCompletionHandler: more than once.' *** First throw call stack: (0x1875475ec 0x184ae1244 0x1994c49c0 0x217193358 0x217199899 0x192e208b9 0x217192fd9 0x30204c88d 0x3019e5155 0x301e5fb41 0x301af7add 0x301aff97d 0x301af888d 0x301aff27d 0x301ab5fa5 0x301ab6101 0x192e5ee39) libc++abi: terminating due to uncaught exception of type NSException My previous code worked fine, but it's crashing with Swift 6. Does anyone know a solution for this? ## **Previous code:** func extractAudioFromVideo(from videoURL: URL, exportHandler: ((AVAssetExportSession, CurrentValueSubject<Float, Never>?) -> Void)? = nil, completion: @escaping (Swift.Result<URL, Error>) -> Void) { let asset = AVAsset(url: videoURL) // Create an AVAssetExportSession to export the audio track guard let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetAppleM4A) else { completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Failed to create AVAssetExportSession"]))) return } // Set the output file type and path guard let filename = videoURL.lastPathComponent.components(separatedBy: ["."]).first else { return } let outputURL = VideoUtils.getTempAudioExportUrl(filename) VideoUtils.deleteFileIfExists(outputURL.path) exportSession.outputFileType = .m4a exportSession.outputURL = outputURL let audioExportProgressPublisher = CurrentValueSubject<Float, Never>(0.0) if let exportHandler = exportHandler { exportHandler(exportSession, audioExportProgressPublisher) } // Periodically check the progress of the export session let timer = Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true) { _ in audioExportProgressPublisher.send(exportSession.progress) } // Export the audio track asynchronously exportSession.exportAsynchronously { switch exportSession.status { case .completed: completion(.success(outputURL)) case .failed: completion(.failure(exportSession.error ?? NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Unknown error occurred while exporting audio"]))) case .cancelled: completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Export session was cancelled"]))) default: completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Unknown export session status"]))) } // Invalidate the timer when the export session completes or is cancelled timer.invalidate() } } ## New Code: func extractAudioFromVideo(from videoURL: URL, exportHandler: ((AVAssetExportSession, CurrentValueSubject<Float, Never>?) -> Void)? = nil, completion: @escaping (Swift.Result<URL, Error>) -> Void) async { let asset = AVAsset(url: videoURL) // Create an AVAssetExportSession to export the audio track guard let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetAppleM4A) else { completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Failed to create AVAssetExportSession"]))) return } // Set the output file type and path guard let filename = videoURL.lastPathComponent.components(separatedBy: ["."]).first else { return } let outputURL = VideoUtils.getTempAudioExportUrl(filename) VideoUtils.deleteFileIfExists(outputURL.path) let audioExportProgressPublisher = CurrentValueSubject<Float, Never>(0.0) if let exportHandler { exportHandler(exportSession, audioExportProgressPublisher) } if #available(iOS 18.0, *) { do { try await exportSession.export(to: outputURL, as: .m4a) let states = exportSession.states(updateInterval: 0.1) for await state in states { switch state { case .pending, .waiting: break case .exporting(progress: let progress): print("Exporting: \(progress.fractionCompleted)") if progress.isFinished { completion(.success(outputURL)) }else if progress.isCancelled { completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Export session was cancelled"]))) }else { audioExportProgressPublisher.send(Float(progress.fractionCompleted)) } } } }catch let error { print(error.localizedDescription) } }else { // Periodically check the progress of the export session let publishTimer = Timer.publish(every: 0.1, on: .main, in: .common) .autoconnect() .sink { [weak exportSession] _ in guard let exportSession else { return } audioExportProgressPublisher.send(exportSession.progress) } exportSession.outputFileType = .m4a exportSession.outputURL = outputURL await exportSession.export() switch exportSession.status { case .completed: completion(.success(outputURL)) case .failed: completion(.failure(exportSession.error ?? NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Unknown error occurred while exporting audio"]))) case .cancelled: completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Export session was cancelled"]))) default: completion(.failure(NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Unknown export session status"]))) } // Invalidate the timer when the export session completes or is cancelled publishTimer.cancel() } }

In my project, i want to add emoji to my video but emoji image becomes dark when add in hdr video, im trying to convert my emoji image to hdr format or create with hdr format but seems not work. I hope someone has experiences in this case could help me.

Safari is supposed to support animated AVIF images since version 16, but the ones I've tested perform very poorly, even on an M4 Mac Mini running Sequoia 15.1.1. I believe Safari delegates decoding to the operating system itself, so this issue also happens in Live Preview in the finder, when I try to preview a file. Sample file here: https://s3.us-west-2.amazonaws.com/cdn.paintera.org/test/sample.avif 322KB file, 5 seconds long, 12fps This plays perfectly on Chrome on Mac OS, but is slow and laggy on Safari and Live Preview (it takes about 6.5 seconds to finish the 5 second video). Does anyone know how to fix this or workaround this issue?

I have AVPlayer with AVPictureInPictureController. Play video in app and picture In Picture works except one situation. Issue is: I pause video in application and during switch to background is not PiP activate. What do I wrong? import UIKit import AVKit import AVFoundation class ViewControllerSec: UIViewController,AVPictureInPictureControllerDelegate { var pipPlayer: AVPlayer! var avCanvas : UIView! var pipCanvas: AVPlayerLayer? var pipController: AVPictureInPictureController! var mainViewControler : UIViewController! var playerItem : AVPlayerItem! var videoAvasset : AVAsset! public func link(to parentViewController : UIViewController) { mainViewControler = parentViewController setup() } @objc func appWillResignActiveNotification(application: UIApplication) { guard let pipController = pipController else { print("PiP not supported") return } print("PIP isSuspend: \(pipController.isPictureInPictureSuspended)") print("PIP isPossible: \(pipController.isPictureInPicturePossible)" if playerItem.status == .readyToPlay { if pipPlayer.rate == 0 { pipPlayer.play() } pipController.startPictureInPicture(). ---> Errorin log: Failed to start picture in picture. } else { print("Player not ready for PiP.") } } private func setupAudio() { do { let session = AVAudioSession.sharedInstance() try session.setCategory(.playback, mode: .moviePlayback) try session.setActive(true) } catch { print("Audio session setup failed: \(error.localizedDescription)") } } @objc func playerItemDidFailToPlayToEnd(_ notification: Notification) { if let error = notification.userInfo?[AVPlayerItemFailedToPlayToEndTimeErrorKey] as? Error { print("Failed to play to end: \(error.localizedDescription)") } } func setup() { setupAudio() guard let videoURL = URL(string: "https://demo.unified-streaming.com/k8s/features/stable/video/tears-of-steel/tears-of-steel.mp4/.m3u8") else { return } videoAvasset = AVAsset(url: videoURL) playerItem = AVPlayerItem(asset: videoAvasset) addPlayerObservers() pipPlayer = AVPlayer(playerItem: playerItem) avCanvas = UIView(frame: view.bounds) pipCanvas = AVPlayerLayer(player: pipPlayer) guard let pipCanvas else { return } pipCanvas.frame = avCanvas.bounds //pipCanvas.videoGravity = .resizeAspectFill mainViewControler.view.addSubview(avCanvas) avCanvas.layer.addSublayer(pipCanvas) if AVPictureInPictureController.isPictureInPictureSupported() { pipController = AVPictureInPictureController(playerLayer: pipCanvas) pipController?.delegate = self pipController?.canStartPictureInPictureAutomaticallyFromInline = true } let playButton = UIButton(frame: CGRect(x: 20, y: 50, width: 100, height: 50)) playButton.setTitle("Play", for: .normal) playButton.backgroundColor = .blue playButton.addTarget(self, action: #selector(playTapped), for: .touchUpInside) mainViewControler.view.addSubview(playButton) let pauseButton = UIButton(frame: CGRect(x: 140, y: 50, width: 100, height: 50)) pauseButton.setTitle("Pause", for: .normal) pauseButton.backgroundColor = .red pauseButton.addTarget(self, action: #selector(pauseTapped), for: .touchUpInside) mainViewControler.view.addSubview(pauseButton) let pipButton = UIButton(frame: CGRect(x: 260, y: 50, width: 150, height: 50)) pipButton.setTitle("Start PiP", for: .normal) pipButton.backgroundColor = .green pipButton.addTarget(self, action: #selector(startPictureInPicture), for: .touchUpInside) mainViewControler.view.addSubview(pipButton) print("Error:\(String(describing: pipPlayer.error?.localizedDescription))") NotificationCenter.default.addObserver(forName: UIApplication.didEnterBackgroundNotification, object: nil, queue: nil) { [weak self] _ in guard let self = self else { return } if self.pipPlayer.rate == 0 { self.pipPlayer.play() pipController?.startPictureInPicture() } } func addPlayerObservers() { playerItem?.addObserver(self, forKeyPath: "status", options: [.old, .new], context: nil) NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying(_:)), name: .AVPlayerItemDidPlayToEndTime, object: playerItem) } override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) { if keyPath == "status" { if let statusNumber = change?[.newKey] as? NSNumber { let status = AVPlayer.Status(rawValue: statusNumber.intValue)! switch status { case .readyToPlay: print("Player is ready to play") case .failed: print("Player failed: \(String(describing: playerItem?.error))") case .unknown: print("Player status is unknown") @unknown default: fatalError() } } } } @objc func playerDidFinishPlaying(_ notification: Notification) { print("Video finished playing.") } deinit { playerItem?.removeObserver(self, forKeyPath: "status") NotificationCenter.default.removeObserver(self) } @objc func playTapped() { pipPlayer.play() } @objc func pauseTapped() { pipPlayer.pause() } @objc func startPictureInPicture() { if let pipController = pipController, !pipController.isPictureInPictureActive { pipController.startPictureInPicture() } } @objc func stopPictureInPicture() { if let pipController = pipController, pipController.isPictureInPictureActive { pipController.stopPictureInPicture() } } func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, failedToStartPictureInPictureWithError error: Error) { print("Failed to start PiP: \(error.localizedDescription)") if let underlyingError = (error as NSError).userInfo[NSUnderlyingErrorKey] { print("Underlying error: \(underlyingError)") } } }

Hello, I’m experiencing an issue with video playback in my Javascript (SvelteKit) application using Capacitor. The video plays and loops correctly on Android and web browsers (including Safari) but stops unexpectedly after a few iterations on iOS native App. <video src={videoPath} autoplay muted loop playsinline class="h-auto w-full max-w-full object-cover"></video> Has anyone encountered a similar issue or have insights into what might be causing this behavior on iOS? Any suggestions or workarounds would be greatly appreciated. Maybe it has something to do with the iOS power saving policy? Thank you in advance for your help!

Hello, I work on a video streaming app, and I have been working on this crash that we are seeing quite frequently (it is our #2 crasher at the moment). The stack trace indicates that an AVPictureInPictureController is being deallocated on a background thread. This leads to dangling AutoLayout constraints getting cleaned up, further resulting in an exception being thrown from the framework about the layout engine being accessed from a background thread. We have internal analytics which indicate that the crash occurs after the user comes back to the app after putting it in the background, and switches playback from Picture in Picture mode back to the app's regular playback UI. What has me puzzled here is that, as I'm sure you know, we have no control over the PIP UI. It is entirely system-provided, and there is none of our app's code in the stack trace. The whole process is even initiated by a KVO on an AVPlayerController property, and our app doesn't use that class directly anywhere. So how did we manage to cause this process to happen on a background thread? Add to this the fact that the bug only appeared once we switched to compiling with Xcode 16, and is overwhelmingly present only on devices running iOS 18. These factors lead me to believe that this is probably an OS issue. But before I go to file a feedback, I thought I would post here in case anyone has any ideas. I have attached an instance of the crash log to this post. 2025-01-08_17-32-45.7003_-0800-ea8d5c3323e0f1fc059cf83f6ec86377bdae1788.crash

How do we export a spatial video at a higher resolution than 2200 x 2200? For example, I want to export a video that I edited in a spatial timeline as 4096 x 4096 resolution with spatial metadata to output as an MV-HEVC file. I looked under both Final Cut and Compressor export settings, but couldn't find a way to do this. Thanks for your help!

Can anyone explain how AVAssetExportSession works in iOS 18 and earlier versions?

I see in most of the old sample codes from Apple that when using AVAssetWriter to append audio, video, and metadata samples in a real time camera recording setup, calls to .append(sampleBuffer) are either synchronised using an NSLock or all the samples are sent to the asset writer on the same dispatch queue thereby preventing concurrent writes. However I can't find any documentation that calls to assetWriterInput.append(sampleBuffer) for different media samples such as Audio and Video should not be done concurrently. Is it not valid for these methods to be executed in parallel for instance? `videoSamplesAssetWriterInput.append(videoSampleBuffer)` from DispatchQueue 1 `audioSamplesAssetWriterInput.append(audioSampleBuffer)` from DispatchQueue 2

Hello! I am building a video camera app and trying to implement Apple log for iPhone 15 Pro and 16 Pro. I am not seeing a lot of documentation on it and notice the amount of apps that use it on the app is rather limited. Less an 5 to be exact. Is Apple Log recording a feature that is accessible to developers? Here is a link to documentation: https://developer.apple.com/documentation/avfoundation/avcapturecolorspace/applelog

We integrate with FCP X using a custom share destination and the Apple Script interface. This has been working fine until the the recent version 11 update of FCP X. With this update we are no longer receiving the open event when the export has completed. We get the apple event to creat the Asset and the file is exported to the location we set in the response. There is just no open event after that. I suspect something is wrong with our scripting support but I have no idea what or how to troubleshoot. This works fine in 10.8.1 and below.

Hi I'm working on a project that require video frame PTS to be consistent between original video and a transcoded one. It's working fairly well on regular mp4, however if I set preferredOutputSegmentInterval to have generate a fMP4 output, even I specified the initialSegmentStartTime as 0, it always add one frame pts offset to all frames. For example: if I use the code sample provided by Apple: https://developer.apple.com/videos/play/wwdc2020/10011/?time=406, useffprobe -select_streams v:0 -show_entries packet=pts_time -of csv ~/Downloads/fmp4/prog_index.m3u8 to display the pts of the output, it doesn't start from 0, but has some one frame pts offset. I also tried open with MP4Box, it also shows the first frames dts and cts are not start from 0. However, if I use AVAssetReader to read the same output video, and get the PTS from 1st frame, it's returning 0. So I can't use it to calculate the pts difference between 2 videos neither. Can I get some help to understand why there is difference between AVAssetWriter/Reader fMP4's pts and others like ffprobe?

I noticed that AVSampleBufferDisplayLayerContentLayer is not released when the AVSampleBufferDisplayLayer is removed and released. It is possible to reproduce the issue with the simple code: import AVFoundation import UIKit class ViewController: UIViewController { var displayBufferLayer: AVSampleBufferDisplayLayer? override func viewDidLoad() { super.viewDidLoad() let displayBufferLayer = AVSampleBufferDisplayLayer() displayBufferLayer.videoGravity = .resizeAspectFill displayBufferLayer.frame = view.bounds view.layer.insertSublayer(displayBufferLayer, at: 0) self.displayBufferLayer = displayBufferLayer DispatchQueue.main.asyncAfter(deadline: .now() + 1) { self.displayBufferLayer?.flush() self.displayBufferLayer?.removeFromSuperlayer() self.displayBufferLayer = nil } } } In my real project I have mutliple AVSampleBufferDisplayLayer created and removed in different view controllers, this is problematic because the amount of leaked AVSampleBufferDisplayLayerContentLayer keeps increasing. I wonder that maybe I should use a pool of AVSampleBufferDisplayLayer and reuse them, however I'm slightly afraid that this can also lead to strange bugs. Edit: It doesn't cause leaks on iOS 18 device but leaks on iPad Pro, iOS 17.5.1

After 18.2 IOS update, videos are not playing in Netflix, Amazon Prime and youtube

Hi all, I'm trying to diagnose and resolve an issue with stuttering video playback using the standard AVPlayer. The video in question is a 4K, 39-second file in *.mov format, being played on an iOS device. It's served via a local HTTP server that proxies requests to a backend to fetch and process the content. The project uses end-to-end encrypted storage, which necessitates the proxy for handling data processing. While playback in offline scenarios is smooth, we are encountering issues with smooth playback during streaming. The same video streams smoothly on other platforms using the same connection, so network limitations are not a factor. On iOS, playback is consistently choppy, with pauses every 1-3 seconds. The video does not appear to buffer adequately for smooth playback. One particularly curious aspect is the seemingly random pattern of Content-Range requests made by the AVPlayer when streaming the video. Below is an example of the range requests:

I am building a video conferencing app using LiveKit in Flutter and want to implement Picture-in-Picture (PiP) mode on iOS. My goal is to display a view showing the speaker's initials or avatar during PiP mode. I successfully implemented this functionality on Android but am struggling to achieve it on iOS. I am using a MethodChannel to communicate with the native iOS code. Here's the Flutter-side code: import 'package:flutter/foundation.dart'; import 'package:flutter/services.dart'; class PipController { static const _channel = MethodChannel('pip_channel'); static Future<void> startPiP() async { try { await _channel.invokeMethod('enterPiP'); } catch (e) { if (kDebugMode) { print("Error starting PiP: $e"); } } } static Future<void> stopPiP() async { try { await _channel.invokeMethod('exitPiP'); } catch (e) { if (kDebugMode) { print("Error stopping PiP: $e"); } } } } On the iOS side, I am using AVPictureInPictureController. Since it requires an AVPlayerLayer, I had to include a dummy video URL to initialize the AVPlayer. However, this results in the dummy video’s audio playing in the background, but no view is displayed in PiP mode. Here’s my iOS code: import Flutter import UIKit import AVKit @main @objc class AppDelegate: FlutterAppDelegate { var pipController: AVPictureInPictureController? var playerLayer: AVPlayerLayer? override func application( _ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? ) -> Bool { let controller: FlutterViewController = window?.rootViewController as! FlutterViewController let pipChannel = FlutterMethodChannel(name: "pip_channel", binaryMessenger: controller.binaryMessenger) pipChannel.setMethodCallHandler { [weak self] (call: FlutterMethodCall, result: @escaping FlutterResult) in if call.method == "enterPiP" { self?.startPictureInPicture(result: result) } else if call.method == "exitPiP" { self?.stopPictureInPicture(result: result) } else { result(FlutterMethodNotImplemented) } } GeneratedPluginRegistrant.register(with: self) return super.application(application, didFinishLaunchingWithOptions: launchOptions) } private func startPictureInPicture(result: @escaping FlutterResult) { guard AVPictureInPictureController.isPictureInPictureSupported() else { result(FlutterError(code: "UNSUPPORTED", message: "PiP is not supported on this device.", details: nil)) return } // Set up the AVPlayer let player = AVPlayer(url: URL(string: "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4")!) let playerLayer = AVPlayerLayer(player: player) self.playerLayer = playerLayer // Create a dummy view let dummyView = UIView(frame: CGRect(x: 0, y: 0, width: 1, height: 1)) dummyView.isHidden = true window?.rootViewController?.view.addSubview(dummyView) dummyView.layer.addSublayer(playerLayer) playerLayer.frame = dummyView.bounds // Initialize PiP Controller pipController = AVPictureInPictureController(playerLayer: playerLayer) pipController?.delegate = self // Start playback and PiP player.play() pipController?.startPictureInPicture() print("Picture-in-Picture started") result(nil) } private func stopPictureInPicture(result: @escaping FlutterResult) { guard let pipController = pipController, pipController.isPictureInPictureActive else { result(FlutterError(code: "NOT_ACTIVE", message: "PiP is not currently active.", details: nil)) return } pipController.stopPictureInPicture() playerLayer = nil self.pipController = nil result(nil) } } extension AppDelegate: AVPictureInPictureControllerDelegate { func pictureInPictureControllerDidStartPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) { print("PiP started") } func pictureInPictureControllerDidStopPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) { print("PiP stopped") } } Questions: How can I implement PiP mode on iOS without using a video URL (or AVPlayerLayer)? Is there a way to display a custom UIView (like a speaker’s initials or an avatar) in PiP mode instead of requiring a video? Why does PiP not display any view, even though the dummy video URL is playing in the background? I am new to iOS development and would greatly appreciate any guidance or alternative approaches to achieve this functionality. Thank you!

I am developing a macOS 15 MediaExtension plugin to enable additional codecs and container formats in AVFoundation My Plugin is sort of working, but i'd like to debug the XPC process that AVFoundation 'hoists' for me from the calling app (ie - the process hosting my plugin instance that is managing the MESampleBuffer protocol calls for example) Is there a method to configure XCode for interactive attaching to this background process for interactive debugging? Right now I have to use Console + Print which is not fun or productive. Does Apple have a working example of a MediaExtension anywhere? This is an exciting API that is very under-documented. I'm willing to spend a Code Review 'credit' for this, but my issues are not quite focused. Any assistance is highly appreciated!