AVPictureInPictureControllerContentSource *contentSource = [[AVPictureInPictureControllerContentSource alloc] initWithSampleBufferDisplayLayer:self.renderView.sampleBufferDisplayLayer playbackDelegate:self];
AVPictureInPictureController *pictureInPictureController = [[AVPictureInPictureController alloc] initWithContentSource:contentSource];
pictureInPictureController.delegate = self;
(void)pictureInPictureController:(AVPictureInPictureController *)pictureInPictureController failedToStartPictureInPictureWithError:(NSError *)error
{
//error NSError * domain: @"PGPegasusErrorDomain" - code: -1003 0x00000002819fe3a0
}
when first start the PiP play, I got the error "//error NSError * domain: @"PGPegasusErrorDomain" - code: -1003 0x00000002819fe3a0", why?
and second start is Ok.
AVKit
RSS for tagCreate view-level services for media playback, complete with user controls, chapter navigation, and support for subtitles and closed captioning using AVKit.
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Hi everyone,
I'm developing a visionOS app for Apple Vision Pro, and I've encountered an issue related to window resizing at runtime when using AVPlayer to play a live HLS stream.
✅ What I'm Trying to Do
Play a live HLS stream (from Wowza) inside my app using AVPlayer.
Support resizing the immersive window using Vision Pro’s built-in runtime scaling gesture.
Stream works fine at default window size when the app launches.
❌ Problem
If I resize the app’s window at runtime (using the Vision Pro pinch-drag gesture), then try to start the stream, it does not play.
Instead, it just shows the "Loading live stream..." state and never proceeds to playback.
This issue only occurs after resizing the window — if I don’t resize, the stream works perfectly every time.
🧪 What I’ve Tried
Verified the HLS URL — it’s working and plays fine in Safari and in the app before resizing.
Set .automaticallyWaitsToMinimizeStalling = false on AVPlayer.
Observed that .status on AVPlayerItem never reaches .readyToPlay after resizing.
Tried to force window size back using UIWindowScene.requestGeometryUpdate(...), but behavior persists.
PLATFORM AND VERSION :iOS 18.5
I wanted to bring to your attention a critical issue some of our production users are experiencing with the CoinOut app. Specifically, users are encountering a problem when attempting to capture photos of receipts using the app's customized camera feature. The camera, which utilizes AVCaptureVideoPreviewLayer and AVCaptureDevice, occasionally fails to load the preview, resulting in a black screen instead of the expected camera view.
This camera blackout issue is significantly impacting the user experience as it prevents them from snapping photos of their receipts, which is a core functionality of the CoinOut app.
Any help/suggestion to this issue would be greatly appreciated.
STEPS TO REPRODUCE
Open the app and click on camera icon.
It will display camera to capture photo.
Camera shows black for few production user's.
class ViewController: UIViewController {
@IBOutlet private weak var captureButton: UIButton!
private var fillLayer: CAShapeLayer!
private var previewLayer : AVCaptureVideoPreviewLayer!
private var output: AVCapturePhotoOutput!
private var device: AVCaptureDevice!
private var session : AVCaptureSession!
private var highResolutionEnabled: Bool = false
private let sessionQueue = DispatchQueue(label: "session queue")
override func viewDidLoad() {
super.viewDidLoad()
setupCamera()
customiseUI()
}
@IBAction func startCamera(sender: UIButton) {
didTapTakePhoto()
}
private func setupCamera() {
let session = AVCaptureSession()
session.sessionPreset = AVCaptureSession.Preset.high
previewLayer = AVCaptureVideoPreviewLayer(session: session)
output = AVCapturePhotoOutput()
device = AVCaptureDevice.default(.builtInWideAngleCamera, for: AVMediaType.video, position: .back)
if let device = self.device{
do{
let input = try AVCaptureDeviceInput(device: device)
if session.canAddInput(input){ session.addInput(input)}
else { print("\(#fileID):\(#function):\(#line) : Session Input addition failed") }
if session.canAddOutput(output){
output.isHighResolutionCaptureEnabled = self.highResolutionEnabled
session.addOutput(output)
} else { print("\(#fileID):\(#function):\(#line) : Session Input high resolution failed") }
previewLayer.videoGravity = .resizeAspectFill
previewLayer.session = session
sessionQueue.async { session.startRunning() }
self.session = session
self.session.accessibilityElementIsFocused()
try device.lockForConfiguration()
if device.isWhiteBalanceModeSupported(AVCaptureDevice.WhiteBalanceMode.autoWhiteBalance) {
device.whiteBalanceMode = .autoWhiteBalance
} else { print("\(#fileID):\(#function):\(#line) : isWhiteBalanceModeSupported no supported") }
if device.isWhiteBalanceModeSupported(AVCaptureDevice.WhiteBalanceMode.continuousAutoWhiteBalance) {
device.whiteBalanceMode = .continuousAutoWhiteBalance
} else { print("\(#fileID):\(#function):\(#line) : isWhiteBalanceModeSupported no supported") }
if device.isFocusModeSupported(.continuousAutoFocus) { device.focusMode = .continuousAutoFocus}
else if device.isFocusModeSupported(.autoFocus) { device.focusMode = .autoFocus }
device.unlockForConfiguration()
} catch { print("\(#fileID):\(#function):\(#line) : \(error.localizedDescription)") }
} else { print("\(#fileID):\(#function):\(#line) : Device found as nil") }
}
private func customiseUI() {
let path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height), cornerRadius: 0)
let rectangleWidth = view.frame.width - (view.frame.width * 0.16)
let x = (view.frame.width - rectangleWidth) / 2
let rectangleHeight = view.frame.height - (view.frame.height * 0.16)
let y = (view.frame.height - rectangleHeight) / 2
let roundRect = UIBezierPath(roundedRect: CGRect(x: x, y: y, width: rectangleWidth, height: rectangleHeight), byRoundingCorners:.allCorners, cornerRadii: CGSize(width: 0, height: 0))
roundRect.move(to: CGPoint(x: self.view.center.x , y: self.view.center.y))
path.append(roundRect)
path.usesEvenOddFillRule = true
fillLayer = CAShapeLayer()
fillLayer.path = path.cgPath
fillLayer.fillRule = .evenOdd
fillLayer.opacity = 0.4
previewLayer.addSublayer(fillLayer)
previewLayer.frame = view.bounds
view.layer.addSublayer(previewLayer)
view.bringSubviewToFront(captureButton)
}
private func didTapTakePhoto() {
let settings = self.getSettings(camera: self.device)
if device.isAdjustingFocus {
do {
try device.lockForConfiguration()
device.focusMode = .continuousAutoFocus
device.unlockForConfiguration()
device.addObserver(self, forKeyPath: "adjustingFocus", options: [.new], context: nil)
} catch { print(error) }
} else { output.capturePhoto(with: settings, delegate: self) }
}
func getSettings(camera: AVCaptureDevice) -> AVCapturePhotoSettings {
var settings = AVCapturePhotoSettings()
if let rawFormat = output.availableRawPhotoPixelFormatTypes.first {
settings = AVCapturePhotoSettings(rawPixelFormatType: OSType(rawFormat))
}
settings.isHighResolutionPhotoEnabled = self.highResolutionEnabled
let previewPixelType = settings.availablePreviewPhotoPixelFormatTypes.first!
let previewFormat = [kCVPixelBufferPixelFormatTypeKey as String: previewPixelType] as [String : Any]
settings.previewPhotoFormat = previewFormat
return settings
}
}
extension ViewController: AVCapturePhotoCaptureDelegate {
func photoOutput(_ output: AVCapturePhotoOutput, willCapturePhotoFor resolvedSettings: AVCaptureResolvedPhotoSettings) {
AudioServicesDisposeSystemSoundID(1108)
}
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
guard let data = photo.fileDataRepresentation() else { return }
let image = UIImage(data: data)!
showImage(cropped: image)
}
func showImage(cropped: UIImage) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "ImagePreviewViewController") as? ImagePreviewViewController
vc?.captured = cropped
self.present(vc!, animated: true)
}
}```
Hi everyone,
I’m trying to use AVAssetResourceLoaderDelegate to handle a live radio stream (e.g. Icecast/HTTP stream). My goal is to have access to the last 30 seconds of audio data during playback, so I can analyze it for specific audio patterns in near-real-time.
I’ve implemented a custom resource loader that works fine for podcasts and static files, where the file size and content length are known. However, for infinite live streams, my current implementation stops receiving new loading requests after the first one is served. As a result, the playback either stalls or fails to continue.
Has anyone successfully used AVAssetResourceLoaderDelegate with a continuous radio stream? Or maybe you can suggest betterapproach for buffering and analyzing live audio?
Any tips, examples, or advice would be appreciated. Thanks!
Hello, I'm trying to subscribe to AVPlayerItem status updates using Combine and it's bridge to Swift Concurrency – .values.
This is my sample code.
struct ContentView: View {
@State var player: AVPlayer?
@State var loaded = false
var body: some View {
VStack {
if let player {
Text("loading status: \(loaded)")
Spacer()
VideoPlayer(player: player)
Button("Load") {
Task {
let item = AVPlayerItem(
url: URL(string: "https://sample-videos.com/video321/mp4/360/big_buck_bunny_360p_5mb.mp4")!
)
player.replaceCurrentItem(with: item)
let publisher = player.publisher(for: \.status)
for await status in publisher.values {
print(status.rawValue)
if status == .readyToPlay {
loaded = true
break
}
}
print("we are out")
}
}
}
else {
Text("No video selected")
}
}
.task {
player = AVPlayer()
}
}
}
After I click on the "load" button it prints out 0 (as the initial status of .unknown) and nothing after – even when the video is fully loaded.
At the same time this works as expected (loading status is set to true):
struct ContentView: View {
@State var player: AVPlayer?
@State var loaded = false
@State var cancellable: AnyCancellable?
var body: some View {
VStack {
if let player {
Text("loading status: \(loaded)")
Spacer()
VideoPlayer(player: player)
Button("Load") {
Task {
let item = AVPlayerItem(
url: URL(string: "https://sample-videos.com/video321/mp4/360/big_buck_bunny_360p_5mb.mp4")!
)
player.replaceCurrentItem(with: item)
let stream = AsyncStream { continuation in
cancellable = item.publisher(for: \.status)
.sink {
if $0 == .readyToPlay {
continuation.yield($0)
continuation.finish()
}
}
}
for await _ in stream {
loaded = true
cancellable?.cancel()
cancellable = nil
break
}
}
}
}
else {
Text("No video selected")
}
}
.task {
player = AVPlayer()
}
}
}
Is this a bug or something?
Hello everyone,
I'm developing a SwiftUI app that includes a fullscreen video player (AVPlayerViewController or AVPlayerLayer). I'm currently testing the app on an iPhone 16 Pro running iOS 26 Beta, as well as on the corresponding simulator.
With iOS 26, during video playback, an unexpected black or white glow/halo appears around the video, depending on the system appearance (dark/light mode). However, this issue does not occur when testing on iOS 18 — neither on device nor simulator.
Has anyone encountered this issue?
Is there any known workaround or solution to remove this visual effect on iOS 26?
I've attached screenshot below to illustrate the problem.
Thank you in advance for your help!
Hi everyone,
I'm working with AVPlayerViewController in a tvOS/iOS app and ran into a limitation that I believe some developers face.
When using player.currentItem?.currentTime(), we only get the playback time—which is fine while the video is playing. But when the player is paused and the user drags the scrubber, there's no public API to get the time that is currently being previewed under the scrubber thumb (stick), but there's no way to read it programmatically.
This becomes a problem when trying to show thumbnail previews or display metadata tied to the scrubbed position.
Is there any way we can detect the status of the Show When Muted and Show on Skip Back device settings in code ?
I’m building a SwiftUI app whose primary job is to play audio. I manage all of the Now-Playing metadata and Command center manually via the available shared instances:
MPRemoteCommandCenter.shared()
MPNowPlayingInfoCenter.default().nowPlayingInfo
In certain parts of the app I also need to display videos, but as soon as I attach another AVPlayer, it automatically pushes its own metadata into the Control Center and overwrites my audio info.
What I need: a way to show video inline without ever having that video player update the system’s Now-Playing info (or Control Center).
In my app, I start by configuring the shared audio session
do {
try AVAudioSession.sharedInstance().setCategory(.playback,
mode: .default,
options: [
.allowAirPlay,
.allowBluetoothA2DP
])
try AVAudioSession.sharedInstance().setActive(true)
} catch {
NSLog("%@", "**** Failed to set up AVAudioSession \(error.localizedDescription)")
}
and then set the MPRemoteCommandCenter commands and MPNowPlayingInfoCenter nowPlayingInfo like mentioned above.
All this works without any issues as long as I only have one AVPlayer in my app. But when I add other AVPlayers to display some videos (and keep the main AVPlayer for the sound) they push undesired updates to MPNowPlayingInfoCenter:
struct VideoCardView: View {
@State private var player: AVPlayer
let videoName: String
init(player: AVPlayer = AVPlayer(), videoName: String) {
self.player = player
self.videoName = videoName
guard let path = Bundle.main.path(forResource: videoName, ofType: nil) else { return }
let url = URL(fileURLWithPath: path)
let item = AVPlayerItem(url: url)
self.player.replaceCurrentItem(with: item)
}
var body: some View {
VideoPlayer(player: player)
.aspectRatio(contentMode: .fill)
.onAppear {
player.isMuted = true
player.allowsExternalPlayback = false
player.actionAtItemEnd = .none
player.play()
MPNowPlayingInfoCenter.default().nowPlayingInfo = nil
MPNowPlayingInfoCenter.default().playbackState = .stopped
NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime,
object: player.currentItem,
queue: .main) { notification in
guard let finishedItem = notification.object as? AVPlayerItem,
finishedItem === player.currentItem else { return }
player.seek(to: .zero)
player.play()
}
}
.onDisappear {
player.pause()
}
}
}
Which is why I tried adding:
MPNowPlayingInfoCenter.default().nowPlayingInfo = nil
MPNowPlayingInfoCenter.default().playbackState = .stopped // or .interrupted, .unknown
But that didn't work.
I also tried making a wrapper around the AVPlayerViewController in order to set updatesNowPlayingInfoCenter to false, but that didn’t work either:
struct CustomAVPlayerView: UIViewControllerRepresentable {
let player: AVPlayer
func makeUIViewController(context: Context) -> AVPlayerViewController {
let vc = AVPlayerViewController()
vc.player = player
vc.updatesNowPlayingInfoCenter = false
vc.showsPlaybackControls = false
return vc
}
func updateUIViewController(_ controller: AVPlayerViewController, context: Context) {
controller.player = player
}
}
Hence any help on how to embed video in SwiftUI without its AVPlayer touching MPNowPlayingInfoCenter would be greatly appreciated.
All this was tested on an actual device with iOS 18.4.1, and built with Xcode 16.2 on macOS 15.5
I have a crash related to playing video in AVPlayerViewController and AVQueuePlayer. I download the video locally from the network and then initialize it using AVAsset and AVPlayerItem. Can't reproduce locally, but crashes occur from firebase crashlytics only for users starting with iOS 18.4.0 with this trace:
Crashed: com.apple.avkit.playerControllerBackgroundQueue
0 libobjc.A.dylib 0x1458 objc_retain + 16
1 libobjc.A.dylib 0x1458 objc_retain_x0 + 16
2 AVKit 0x12afdc __77-[AVPlayerController currentEnabledAssetTrackForMediaType:completionHandler:]_block_invoke + 108
3 libdispatch.dylib 0x1aac _dispatch_call_block_and_release + 32
4 libdispatch.dylib 0x1b584 _dispatch_client_callout + 16
5 libdispatch.dylib 0x6560 _dispatch_continuation_pop + 596
6 libdispatch.dylib 0x5bd4 _dispatch_async_redirect_invoke + 580
7 libdispatch.dylib 0x13db0 _dispatch_root_queue_drain + 364
8 libdispatch.dylib 0x1454c _dispatch_worker_thread2 + 156
9 libsystem_pthread.dylib 0x4624 _pthread_wqthread + 232
10 libsystem_pthread.dylib 0x19f8 start_wqthread + 8
How can I setup correctly AVSampleBufferDisplayLayer for video display when I have input picture format kCVPixelFormatType_32BGRA?
Currently video i visible in simulator, but not iPhone, miss I something?
Render code:
var pixelBuffer: CVPixelBuffer?
let attrs: [String: Any] = [
kCVPixelBufferPixelFormatTypeKey as String: kCVPixelFormatType_32BGRA,
kCVPixelBufferWidthKey as String: width,
kCVPixelBufferHeightKey as String: height,
kCVPixelBufferBytesPerRowAlignmentKey as String: width * 4,
kCVPixelBufferIOSurfacePropertiesKey as String: [:]
]
let status = CVPixelBufferCreateWithBytes(
nil,
width,
height,
kCVPixelFormatType_32BGRA,
img,
width * 4,
nil,
nil,
attrs as CFDictionary,
&pixelBuffer
)
guard status == kCVReturnSuccess, let pb = pixelBuffer else { return }
var formatDesc: CMVideoFormatDescription?
CMVideoFormatDescriptionCreateForImageBuffer(
allocator: nil,
imageBuffer: pb,
formatDescriptionOut: &formatDesc
)
guard let format = formatDesc else { return }
var timingInfo = CMSampleTimingInfo(
duration: .invalid,
presentationTimeStamp: currentTime,
decodeTimeStamp: .invalid
)
var sampleBuffer: CMSampleBuffer?
CMSampleBufferCreateForImageBuffer(
allocator: kCFAllocatorDefault,
imageBuffer: pb,
dataReady: true,
makeDataReadyCallback: nil,
refcon: nil,
formatDescription: format,
sampleTiming: &timingInfo,
sampleBufferOut: &sampleBuffer
)
if let sb = sampleBuffer {
if CMSampleBufferGetPresentationTimeStamp(sb) == .invalid {
print("Invalid video timestamp")
}
if (displayLayer.status == .failed) {
displayLayer.flush()
}
DispatchQueue.main.async { [weak self] in
guard let self = self else {
print("Lost reference to self drawing")
return
}
displayLayer.enqueue(sb)
}
frameIndex += 1
}
I have a simple AVAudioEngine graph as follows:
AVAudioPlayerNode -> AVAudioUnitEQ -> AVAudioUnitTimePitch -> AVAudioUnitReverb -> Main mixer node of AVAudioEngine.
I noticed that whenever I have AVAudioUnitTimePitch or AVAudioUnitVarispeed in the graph, I noticed a very distinct crackling/popping sound in my Airpods Pro 2 when starting up the engine and playing the AVAudioPlayerNode and unable to find the reason why this is happening. When I remove the node, the crackling completely goes away. How do I fix this problem since i need the user to be able to control the pitch and rate of the audio during playback.
import AVKit
@Observable @MainActor
class AudioEngineManager {
nonisolated private let engine = AVAudioEngine()
private let playerNode = AVAudioPlayerNode()
private let reverb = AVAudioUnitReverb()
private let pitch = AVAudioUnitTimePitch()
private let eq = AVAudioUnitEQ(numberOfBands: 10)
private var audioFile: AVAudioFile?
private var fadePlayPauseTask: Task<Void, Error>?
private var playPauseCurrentFadeTime: Double = 0
init() {
setupAudioEngine()
}
private func setupAudioEngine() {
guard let url = Bundle.main.url(forResource: "Song name goes here", withExtension: "mp3") else {
print("Audio file not found")
return
}
do {
audioFile = try AVAudioFile(forReading: url)
} catch {
print("Failed to load audio file: \(error)")
return
}
reverb.loadFactoryPreset(.mediumHall)
reverb.wetDryMix = 50
pitch.pitch = 0 // Increase pitch by 500 cents (5 semitones)
engine.attach(playerNode)
engine.attach(pitch)
engine.attach(reverb)
engine.attach(eq)
// Connect: player -> pitch -> reverb -> output
engine.connect(playerNode, to: eq, format: audioFile?.processingFormat)
engine.connect(eq, to: pitch, format: audioFile?.processingFormat)
engine.connect(pitch, to: reverb, format: audioFile?.processingFormat)
engine.connect(reverb, to: engine.mainMixerNode, format: audioFile?.processingFormat)
}
func prepare() {
guard let audioFile else { return }
playerNode.scheduleFile(audioFile, at: nil)
}
func play() {
DispatchQueue.global().async { [weak self] in
guard let self else { return }
engine.prepare()
try? engine.start()
DispatchQueue.main.async { [weak self] in
guard let self else { return }
playerNode.play()
fadePlayPauseTask?.cancel()
playPauseCurrentFadeTime = 0
fadePlayPauseTask = Task { [weak self] in
guard let self else { return }
while true {
let volume = updateVolume(for: playPauseCurrentFadeTime / 0.1, rising: true)
// Ramp up volume until 1 is reached
if volume >= 1 { break }
engine.mainMixerNode.outputVolume = volume
try await Task.sleep(for: .milliseconds(10))
playPauseCurrentFadeTime += 0.01
}
engine.mainMixerNode.outputVolume = 1
}
}
}
}
func pause() {
fadePlayPauseTask?.cancel()
playPauseCurrentFadeTime = 0
fadePlayPauseTask = Task { [weak self] in
guard let self else { return }
while true {
let volume = updateVolume(for: playPauseCurrentFadeTime / 0.1, rising: false)
// Ramp down volume until 0 is reached
if volume <= 0 { break }
engine.mainMixerNode.outputVolume = volume
try await Task.sleep(for: .milliseconds(10))
playPauseCurrentFadeTime += 0.01
}
engine.mainMixerNode.outputVolume = 0
playerNode.pause()
// Shut down engine once ramp down completes
DispatchQueue.global().async { [weak self] in
guard let self else { return }
engine.pause()
}
}
}
private func updateVolume(for x: Double, rising: Bool) -> Float {
if rising {
// Fade in
return Float(pow(x, 2) * (3.0 - 2.0 * (x)))
} else {
// Fade out
return Float(1 - (pow(x, 2) * (3.0 - 2.0 * (x))))
}
}
func setPitch(_ value: Float) {
pitch.pitch = value
}
func setReverbMix(_ value: Float) {
reverb.wetDryMix = value
}
}
struct ContentView: View {
@State private var audioManager = AudioEngineManager()
@State private var pitch: Float = 0
@State private var reverb: Float = 0
var body: some View {
VStack(spacing: 20) {
Text("🎵 Audio Player with Reverb & Pitch")
.font(.title2)
HStack {
Button("Prepare") {
audioManager.prepare()
}
Button("Play") {
audioManager.play()
}
.padding()
.background(Color.green)
.foregroundColor(.white)
.cornerRadius(10)
Button("Pause") {
audioManager.pause()
}
.padding()
.background(Color.red)
.foregroundColor(.white)
.cornerRadius(10)
}
VStack {
Text("Pitch: \(Int(pitch)) cents")
Slider(value: $pitch, in: -2400...2400, step: 100) { _ in
audioManager.setPitch(pitch)
}
}
VStack {
Text("Reverb Mix: \(Int(reverb))%")
Slider(value: $reverb, in: 0...100, step: 1) { _ in
audioManager.setReverbMix(reverb)
}
}
}
.padding()
}
}
Hello Apple Developer Community,
I am trying to play an HLS stream using the React Native Video player (underneath it's using AvPlayer). I am able to play the stream smoothly, but in some cases the player can not play the stream properly.
Behaviour:
react-native-video: I am getting the below error.
Error details from react-native-video player:
Error Code: -12971
Domain: CoreMediaErrorDomain
Localised Description: The operation couldn’t be completed. (CoreMediaErrorDomain error -12971.)
Target: 2457
The error does not provide a specific failure reason or recovery suggestion, which makes troubleshooting challenging.
AvPlayer on native iOS project: Video playback stopped after playing a few seconds.
AVPlayer configuration:
player.currentItem?.preferredForwardBufferDuration = 1
player.automaticallyWaitsToMinimizeStalling = true
N.B.: The same buffer duration is working perfectly for others.
Stream properties:
video resolution: 1280 x 720
I have attached an overview report generated from MediaStreamValidator.
I would appreciate any insights or suggestions on how to address this error. Has anyone in the community experienced a similar issue or have any advice on potential solutions?
Thank you for your help!
Dear Developers and DTS team,
This is writing to seek your expert guidance on a persistent memory leak issue I've discovered while implementing video playback in a SwiftUI application.
Environment Details:
iOS 17+, Swift (SwiftUI, AVKit), Xcode 16.2
Target Devices:
iPhone 15 Pro (iOS 18.3.2)
iPhone 16 Plus (iOS 18.3.2)
Detailed Issue Description:
I am experiencing consistent memory leaks when using UIViewControllerRepresentable with AVPlayerViewController for FullscreenVideoPlayer and native VideoPlayer during video playback termination.
Code Context:
I have implemented the following approaches:
Added static func dismantleUIViewController(: coordinator:)
Included deinit in Coordinator
Utilized both UIViewControllerRepresentable and native VideoPlayer
/// A custom AVPlayer integrated with AVPlayerViewController for fullscreen video playback.
///
/// - Parameters:
/// - videoURL: The URL of the video to be played.
struct FullscreenVideoPlayer: UIViewControllerRepresentable {
// @Binding something for controlling fullscreen
let videoURL: URL?
func makeUIViewController(context: Context) -> AVPlayerViewController {
let controller = AVPlayerViewController()
controller.delegate = context.coordinator
print("AVPlayerViewController created: \(String(describing: controller))")
return controller
}
/// Updates the `AVPlayerViewController` with the provided video URL and playback state.
///
/// - Parameters:
/// - uiViewController: The `AVPlayerViewController` instance to update.
/// - context: The SwiftUI context for updates.
func updateUIViewController(_ uiViewController: AVPlayerViewController, context: Context) {
guard let videoURL else {
print("Invalid videoURL")
return
}
// Initialize AVPlayer if it's not already set
if uiViewController.player == nil || uiViewController.player?.currentItem == nil {
uiViewController.player = AVPlayer(url: videoURL)
print("AVPlayer updated: \(String(describing: uiViewController.player))")
}
// Handle playback state
}
func makeCoordinator() -> Coordinator {
Coordinator(parent: self)
}
static func dismantleUIViewController(_ uiViewController: AVPlayerViewController, coordinator: Coordinator) {
uiViewController.player?.pause()
uiViewController.player?.replaceCurrentItem(with: nil)
uiViewController.player = nil
print("dismantleUIViewController called for \(String(describing: uiViewController))")
}
}
extension FullscreenVideoPlayer {
class Coordinator: NSObject, AVPlayerViewControllerDelegate {
var parent: FullscreenVideoPlayer
init(parent: FullscreenVideoPlayer) {
self.parent = parent
}
deinit {
print("Coordinator deinitialized")
}
}
}
struct ContentView: View {
private let videoURL: URL? = URL(string: "https://interactive-examples.mdn.mozilla.net/media/cc0-videos/flower.mp4")
var body: some View {
NavigationStack {
Text("My Userful View")
List {
Section("VideoPlayer") {
NavigationLink("FullscreenVideoPlayer") {
FullscreenVideoPlayer(videoURL: videoURL)
.frame(height: 500)
}
NavigationLink("Native VideoPlayer") {
VideoPlayer(player: .init(url: videoURL!))
.frame(height: 500)
}
}
}
}
}
}
Reproducibility Steps:
Run application on target devices
Scenario A - FullscreenVideoPlayer:
Tap FullscreenVideoPlayer
Play video to completion
Repeat process 5 times
Scenario B - VideoPlayer:
Navigate back to main screen
Tap Video Player
Play video to completion
Repeat process 5 times
Observed Memory Leak Characteristics:
Per Iteration (Debug Memory Graph):
4 instances of NSMutableDictionary (Storage) leaked
4 instances of __NSDictionaryM leaked
4 × 112-byte malloc blocks leaked
Cumulative Effects:
Debug console prints: "dismantleUIViewController called for <AVPlayerViewController: 0x{String}> Coordinator deinitialized" when navigate back to main screen
After multiple iterations, leak instances double
Specific Questions:
What underlying mechanisms are causing these memory leaks in UIViewControllerRepresentable and VideoPlayer?
What are the recommended strategies to comprehensively prevent and resolve these memory management issues?
I am trying to stream audio from local filesystem.
For that, I am trying to use an AVAssetResourceLoaderDelegate for an AVURLAsset. However, Content-Length is not known at the start. To overcome this, I tried several methods:
Set content length as nil, in the AVAssetResourceLoadingContentInformationRequest
Set content length to -1, in the ContentInformationRequest
Both of these cause the AVPlayerItem to fail with an error.
I also tried setting Content-Length as INT_MAX, and setting a renewalDate = Date(timeIntervalSinceNow: 5). However, that seems to be buggy. Even after updating the Content-Length to the correct value (e.g. X bytes) and finishing that loading request, the resource loader keeps getting requests with requestedOffset = X with dataRequest.requestsAllDataToEndOfResource = true. These requests keep coming indefinitely, and as a result it seems that the next item in the queue does not get played. Also, .AVPlayerItemDidPlayToEndTime notification does not get called.
I wanted to check if this is an expected behavior or is there a bug in this implementation. Also, what is the recommended way to stream audio of unknown initial length from local file system?
Thanks!
We have the necessary background recording entitlements, and for many users... do not run into any issues.
However, there is a subset of users that routinely get recordings ending.. we have narrowed this down and believe it to be the work of the watch dog.
First we removed the entire view hierarchy when app is backgrounded. There is just 'Text("Recording")'
This got the CPU usage in profiler down to 0%. We saw massive improvements to recording success rate.
We walked away assuming that was enough. However we are still seeing the same sort of crashes. All in the background. We're using Observation to drive audio state changes to a Live Activity.
Are those Observations causing the problem? Why doesn't apple provide a better API to background audio? The internet is full of weird issues
https://stackoverflow.com/questions/76010213/why-is-my-react-native-app-sometimes-terminated-in-the-background-while-tracking
https://stackoverflow.com/questions/71656047/why-is-my-react-native-app-terminating-in-the-background-while-recording-ios-r
https://github.com/expo/expo/issues/16807
This is such a terrible user experience. And we have very little visibility into what is happening and why.
No where in apple documentation states that in order for background recording to work, the app can only be 'Text("Recording")'
It does not outline a CPU or memory threshold. It just kills us.
We're experiencing significant issues with AVPlayer when attempting to play partially downloaded HLS content in offline mode. Our app downloads HLS video content for offline viewing, but users encounter the following problems:
Excessive Loading Delay: When offline, AVPlayer attempts to load resources for up to 60 seconds before playing the locally available segments
Asset Loss: Sometimes AVPlayer completely loses the asset reference and fails to play the video on subsequent attempts
Inconsistent Behavior: The same partially downloaded asset might play immediately in one session but take 30+ seconds in another
Network Activity Despite Offline Settings: Despite configuring options to prevent network usage, AVPlayer still appears to be attempting network connections
These issues severely impact our offline user experience, especially for users with intermittent connectivity.
Technical Details
Implementation Context
Our app downloads HLS videos for offline viewing using AVAssetDownloadTask. We store the downloaded content locally and maintain a dictionary mapping of file identifiers to local paths. When attempting to play these videos offline, we experience the described issues.
Current Implementation
Here's our current implementation for playing the videos:
- (void)presentNativeAvplayerForVideo:(Video *)video navContext:(NavContext *)context {
NSString *localPath = video.localHlsPath;
if (localPath) {
NSURL *videoURL = [NSURL URLWithString:localPath];
NSDictionary *options = @{
AVURLAssetPreferPreciseDurationAndTimingKey: @YES,
AVURLAssetAllowsCellularAccessKey: @NO,
AVURLAssetAllowsExpensiveNetworkAccessKey: @NO,
AVURLAssetAllowsConstrainedNetworkAccessKey: @NO
};
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:options];
AVPlayerViewController *playerViewController = [[AVPlayerViewController alloc] init];
NSArray *keys = @[@"duration", @"tracks"];
[asset loadValuesAsynchronouslyForKeys:keys completionHandler:^{
dispatch_async(dispatch_get_main_queue(), ^{
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:asset];
AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];
playerViewController.player = player;
[player play];
});
}];
playerViewController.modalPresentationStyle = UIModalPresentationFullScreen;
[context presentViewController:playerViewController animated:YES completion:nil];
}
}
Attempted Solutions
We've tried several approaches to mitigate these issues:
Modified Asset Options:
NSDictionary *options = @{
AVURLAssetPreferPreciseDurationAndTimingKey: @NO, // Changed to NO
AVURLAssetAllowsCellularAccessKey: @NO,
AVURLAssetAllowsExpensiveNetworkAccessKey: @NO,
AVURLAssetAllowsConstrainedNetworkAccessKey: @NO,
AVAssetReferenceRestrictionsKey: @(AVAssetReferenceRestrictionForbidRemoteReferenceToLocal)
};
Skipped Asynchronous Key Loading:
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:asset automaticallyLoadedAssetKeys:nil];
Modified Player Settings:
player.automaticallyWaitsToMinimizeStalling = NO;
[playerItem setPreferredForwardBufferDuration:2.0];
Added Network Resource Restrictions:
playerItem.canUseNetworkResourcesForLiveStreamingWhilePaused = NO;
Used File URLs Instead of HTTP URLs where possible
Despite these attempts, the issues persist.
Expected vs. Actual Behavior
Expected Behavior:
AVPlayer should immediately begin playback of locally available HLS segments
When offline, it should not attempt to load from network for more than a few seconds
Once an asset is successfully played, it should be reliably available for future playback
Actual Behavior:
AVPlayer waits 10-60 seconds before playing locally available segments
Network activity is observed despite all network-restricting options
Sometimes the player fails completely to play a previously available asset
Behavior is inconsistent between playback attempts with the same asset
Questions:
What is the recommended approach for playing partially downloaded HLS content offline with minimal delay?
Is there a way to force AVPlayer to immediately use available local segments without attempting to load from the network?
Are there any known issues with AVPlayer losing references to locally stored HLS assets?
What diagnostic steps would you recommend to track down the specific cause of these delays?
Does AVFoundation have specific timeouts for offline HLS playback that could be configured?
Any guidance would be greatly appreciated as this issue is significantly impacting our user experience.
Device Information
iOS Versions Tested: 14.5 - 18.1
Device Models: iPhone 12, iPhone 13, iPhone 14, iPhone 15
Xcode Version: 15.3-16.2.1
I am playing the protected HLS streams and the authorization token expires in 3 minutes. I am trying to achieve this with 'AVAssetResourceLoaderDelegate'. I can refresh the token and play it, but the problem is in between the session, the player stalls for a small time, LIKE 1 SECOND.
Here's my code :
class APLCustomAVARLDelegate: NSObject, AVAssetResourceLoaderDelegate {
static let httpsScheme = "https"
static let redirectErrorCode = 302
static let badRequestErrorCode = 400
private var token: String?
private var retryDictionary = [String: Int]()
private let maxRetries = 3
private func schemeSupported(_ scheme: String) -> Bool {
let supported = ishttpSchemeValid(scheme)
print("Scheme '\(scheme)' supported: \(supported)")
return supported
}
private func reportError(loadingRequest: AVAssetResourceLoadingRequest, error: Int) {
let nsError = NSError(domain: NSURLErrorDomain, code: error, userInfo: nil)
print("Reporting error: \(nsError)")
loadingRequest.finishLoading(with: nsError)
}
// Handle token renewal requests to prevent playback stalls
func resourceLoader(_ resourceLoader: AVAssetResourceLoader, shouldWaitForRenewalOfRequestedResource renewalRequest: AVAssetResourceRenewalRequest) -> Bool {
print("Resource renewal requested for URL: \(renewalRequest.request.url?.absoluteString ?? "unknown URL")")
// Handle renewal the same way we handle initial requests
guard let scheme = renewalRequest.request.url?.scheme else {
print("No scheme found in the renewal URL.")
return false
}
if isHttpsSchemeValid(scheme) {
return handleHttpsRequest(renewalRequest)
}
print("Scheme not supported for renewal.")
return false
}
private func isHttpsSchemeValid(_ scheme: String) -> Bool {
let isValid = scheme == APLCustomAVARLDelegate.httpsScheme
print("httpsScheme scheme '\(scheme)' valid: \(isValid)")
return isValid
}
private func generateHttpsURL(sourceURL: URL) -> URL? {
// If you need to modify the URL, do it here
// Currently this just returns the same URL
let urlString = sourceURL.absoluteString
print("Generated HTTPS URL: \(urlString)")
return URL(string: urlString)
}
private func handleHttpsRequest(_ loadingRequest: AVAssetResourceLoadingRequest) -> Bool {
print("Handling HTTPS request.")
guard let sourceURL = loadingRequest.request.url,
var redirectURL = generateHttpsURL(sourceURL: sourceURL) else {
print("Failed to generate HTTPS URL.")
reportError(loadingRequest: loadingRequest, error: APLCustomAVARLDelegate.badRequestErrorCode)
return true
}
// Track retry attempts with a dictionary keyed by request URL
let urlString = sourceURL.absoluteString
let currentRetries = retryDictionary[urlString] ?? 0
if currentRetries < maxRetries {
retryDictionary[urlString] = currentRetries + 1
} else {
// Too many retries, report a more specific error
reportError(loadingRequest: loadingRequest, error: NSURLErrorTimedOut)
retryDictionary.removeValue(forKey: urlString)
return true
}
if var urlComponents = URLComponents(url: redirectURL, resolvingAgainstBaseURL: false) {
var queryItems = urlComponents.queryItems ?? []
// Generate a fresh token each time
let freshToken = AESTimeBaseEncription.secureEncryptSecretText()
// Check if the token already exists
if let existingTokenIndex = queryItems.firstIndex(where: { $0.name == "token" }) {
// Update the existing token
queryItems[existingTokenIndex].value = freshToken
} else {
// Add the token if it doesn't exist
queryItems.append(URLQueryItem(name: "token", value: freshToken))
}
urlComponents.queryItems = queryItems
redirectURL = urlComponents.url!
}
let redirectRequest = URLRequest(url: redirectURL)
let response = HTTPURLResponse(url: redirectURL, statusCode: APLCustomAVARLDelegate.redirectErrorCode, httpVersion: nil, headerFields: nil)
print("Redirecting HTTPS to URL: \(redirectURL)")
loadingRequest.redirect = redirectRequest
loadingRequest.response = response
loadingRequest.finishLoading()
// If successful, reset the retry counter
if retryDictionary[urlString] == maxRetries {
retryDictionary.removeValue(forKey: urlString)
}
return true
}
}
We are using AVAssetDownloadURLSession to download content with multiple audio tracks. Still, we are facing an issue where only one audio language is being downloaded, despite explicitly requesting multiple audio languages. However, all subtitle variants are being downloaded successfully.
Issue Details:
Observed Behaviour: When initiating a download using AVAssetDownloadURLSession, only one audio track (Hindi, in this case) is downloaded, even though the content contains multiple audio tracks.
Expected Behaviour: All requested audio tracks should be downloaded, similar to how subtitle variants are successfully downloaded.
Please find sample app implementation details: https://drive.google.com/file/d/1DLcBGNnuWFYsY0cipzxpIHqZYUDJujmN/view?usp=sharing
Manifest file for the asset looks something like below
#EXTM3U
#EXT-X-VERSION:6
#EXT-X-INDEPENDENT-SEGMENTS
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1",NAME="Hindi",LANGUAGE="hi",URI="indexHindi/Hindi.m3u8",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A2",NAME="Bengali",LANGUAGE="bn",URI="indexBengali/Bengali.m3u8",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A3",NAME="Kannada",LANGUAGE="kn",URI="indexKannada/Kannada.m3u8",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A4",NAME="Malayalam",LANGUAGE="ml",URI="indexMalayalam/Malayalam.m3u8",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A5",NAME="Tamil",LANGUAGE="ta",URI="indexTamil/Tamil.m3u8",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A6",NAME="Telugu",LANGUAGE="te",URI="indexTelugu/Telugu.m3u8",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-STREAM-INF:BANDWIDTH=832196,AVERAGE-BANDWIDTH=432950,RESOLUTION=640x360,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A1",SUBTITLES="subs"
index-4k360p/360p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=832196,AVERAGE-BANDWIDTH=432950,RESOLUTION=640x360,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A2",SUBTITLES="subs"
index-4k360p/360p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=832196,AVERAGE-BANDWIDTH=432950,RESOLUTION=640x360,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A3",SUBTITLES="subs"
index-4k360p/360p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=832196,AVERAGE-BANDWIDTH=432950,RESOLUTION=640x360,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A4",SUBTITLES="subs"
index-4k360p/360p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=832196,AVERAGE-BANDWIDTH=432950,RESOLUTION=640x360,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A5",SUBTITLES="subs"
index-4k360p/360p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=832196,AVERAGE-BANDWIDTH=432950,RESOLUTION=640x360,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A6",SUBTITLES="subs"
index-4k360p/360p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1317051,AVERAGE-BANDWIDTH=607343,RESOLUTION=854x480,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A1",SUBTITLES="subs"
index-4k480p/480p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1317051,AVERAGE-BANDWIDTH=607343,RESOLUTION=854x480,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A2",SUBTITLES="subs"
index-4k480p/480p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1317051,AVERAGE-BANDWIDTH=607343,RESOLUTION=854x480,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A3",SUBTITLES="subs"
index-4k480p/480p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1317051,AVERAGE-BANDWIDTH=607343,RESOLUTION=854x480,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A4",SUBTITLES="subs"
index-4k480p/480p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1317051,AVERAGE-BANDWIDTH=607343,RESOLUTION=854x480,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A5",SUBTITLES="subs"
index-4k480p/480p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1317051,AVERAGE-BANDWIDTH=607343,RESOLUTION=854x480,FRAME-RATE=25.0,CODECS="hvc1.2.4.L93.b0,mp4a.40.2",AUDIO="A6",SUBTITLES="subs"
index-4k480p/480p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1715498,AVERAGE-BANDWIDTH=717018,RESOLUTION=1024x576,FRAME-RATE=25.0,CODECS="hvc1.2.4.L123.b0,mp4a.40.2",AUDIO="A1",SUBTITLES="subs"
index-4k576p/576p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1715498,AVERAGE-BANDWIDTH=717018,RESOLUTION=1024x576,FRAME-RATE=25.0,CODECS="hvc1.2.4.L123.b0,mp4a.40.2",AUDIO="A2",SUBTITLES="subs"
index-4k576p/576p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1715498,AVERAGE-BANDWIDTH=717018,RESOLUTION=1024x576,FRAME-RATE=25.0,CODECS="hvc1.2.4.L123.b0,mp4a.40.2",AUDIO="A3",SUBTITLES="subs"
index-4k576p/576p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1715498,AVERAGE-BANDWIDTH=717018,RESOLUTION=1024x576,FRAME-RATE=25.0,CODECS="hvc1.2.4.L123.b0,mp4a.40.2",AUDIO="A4",SUBTITLES="subs"
index-4k576p/576p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1715498,AVERAGE-BANDWIDTH=717018,RESOLUTION=1024x576,FRAME-RATE=25.0,CODECS="hvc1.2.4.L123.b0,mp4a.40.2",AUDIO="A5",SUBTITLES="subs"
index-4k576p/576p.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1715498,AVERAGE-BANDWIDTH=717018,RESOLUTION=1024x576,FRAME-RATE=25.0,CODECS="hvc1.2.4.L123.b0,mp4a.40.2",AUDIO="A6",SUBTITLES="subs"
index-4k576p/576p.m3u8
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="English",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE="en",URI="subtitle_en/sub_en_vtt.m3u8"
Hi,
I am recording video using my app. And setting up fps also using below code. But sometime video is being recorded using 20 FPS. Can someone please let me know what I am doing wrong?
private func eightBitVariantOfFormat() -> AVCaptureDevice.Format? {
let activeFormat = self.videoDeviceInput.device.activeFormat
let fpsToBeSupported: Int = 60
debugPrint("fpsToBeSupported - \(fpsToBeSupported)" as AnyObject)
let allSupportedFormats = self.videoDeviceInput.device.formats
debugPrint("all formats - \(allSupportedFormats)" as AnyObject)
let activeDimensions = CMVideoFormatDescriptionGetDimensions(activeFormat.formatDescription)
debugPrint("activeDimensions - \(activeDimensions)" as AnyObject)
let filterBasedOnDimensions = allSupportedFormats.filter({ (CMVideoFormatDescriptionGetDimensions($0.formatDescription).width == activeDimensions.width) && (CMVideoFormatDescriptionGetDimensions($0.formatDescription).height == activeDimensions.height) })
if filterBasedOnDimensions.isEmpty {
// Dimension not found. Required format not found to handle.
debugPrint("Dimension not found" as AnyObject)
return activeFormat
}
debugPrint("filterBasedOnDimensions - \(filterBasedOnDimensions)" as AnyObject)
let filterBasedOnMaxFrameRate = filterBasedOnDimensions.compactMap({ format in
let videoSupportedFrameRateRanges = format.videoSupportedFrameRateRanges
if !videoSupportedFrameRateRanges.isEmpty {
let contains = videoSupportedFrameRateRanges.contains(where: { Int($0.maxFrameRate) >= fpsToBeSupported })
if contains {
return format
} else {
return nil
}
} else {
return nil
}
})
debugPrint("allFormatsToBeSupported - \(filterBasedOnMaxFrameRate)" as AnyObject)
guard !filterBasedOnMaxFrameRate.isEmpty else {
debugPrint("Taking default active format as nothing found when filtered using desired FPS" as AnyObject)
return activeFormat
}
var formatToBeUsed: AVCaptureDevice.Format!
if let four_two_zero_v = filterBasedOnMaxFrameRate.first(where: { CMFormatDescriptionGetMediaSubType($0.formatDescription) == kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange}) {
// 'vide'/'420v'
formatToBeUsed = four_two_zero_v
} else {
// Take the first one from above array.
formatToBeUsed = filterBasedOnMaxFrameRate.first
}
do {
try self.videoDeviceInput.device.lockForConfiguration()
self.videoDeviceInput.device.activeFormat = formatToBeUsed
self.videoDeviceInput.device.activeVideoMinFrameDuration = CMTimeMake(value: 1, timescale: Int32(fpsToBeSupported))
self.videoDeviceInput.device.activeVideoMaxFrameDuration = CMTimeMake(value: 1, timescale: Int32(fpsToBeSupported))
if videoDeviceInput.device.isFocusModeSupported(.continuousAutoFocus) {
self.videoDeviceInput.device.focusMode = AVCaptureDevice.FocusMode.continuousAutoFocus
}
self.videoDeviceInput.device.unlockForConfiguration()
} catch let error {
debugPrint("\(error)" as AnyObject)
}
return formatToBeUsed
}