I'm trying to create code to generate an fcpxml file so I can automate Final Cut Pro timeline (project) creation. Here's an xml element that FCP successfully imports (and successfully creates a project/timeline). <project name="2013-08-09 19_23_07 (id).mov"> <sequence format="r1"> <spine> <asset-clip ref="r2" offset="0s" name="2013-08-09 19_23_07 (id).mov" start="146173027/60000s" duration="871871/60000s" tcFormat="DF" audioRole="dialogue"></asset-clip> </spine> </sequence> </project> The xml element example above was generated by exporting a simple timeline with a single clip. The problem I'm having is the media asset has timecode that gives a start time in relation to the timecode. When I try to remove timecode attributes and change the start time to "0s" <asset-clip ref="r2" offset="0s" name="2013-08-09 19_23_07 (id).mov" start="0s" duration="871871/60000s" audioRole="dialogue"></asset-clip> FCP complains with the import error: 2013-08-09 19_23_07 (id).fcpxml Invalid edit with no respective media. (/fcpxml[1]/project[1]/sequence[1]/spine[1]/asset-clip[1]) I guess the question is, does AVAsset provide a way to get the timecode information and the timecode based start offset, or is there a way to tell FCP to use a default start time independent of timecode?

xcode 16: VT_EXPORT void VT_EXPORT OSStatus VTPixelTransferSessionCreate( CM_NULLABLE CFAllocatorRef allocator, CM_RETURNS_RETAINED_PARAMETER CM_NULLABLE VTPixelTransferSessionRef * CM_NONNULL pixelTransferSessionOut) API_AVAILABLE(macos(10.8), ios(16.0), tvos(16.0), visionos(1.0)) API_UNAVAILABLE(watchos); xcode 15: VT_EXPORT OSStatus VTPixelTransferSessionCreate( CM_NULLABLE CFAllocatorRef allocator, CM_RETURNS_RETAINED_PARAMETER CM_NULLABLE VTPixelTransferSessionRef * CM_NONNULL pixelTransferSessionOut) VT_AVAILABLE_STARTING(10_8);

I’m currently working on an iOS project that involves loading and playing stereoscopic/spatial videos. I’m using the AVFoundation framework, specifically AVURLAsset, but I’m having trouble determining how to correctly load and handle stereoscopic videos. I would like to know: Any guidance or code snippets would be greatly appreciated, I´m not understanding pretty well the apple developer videos... Thank you in advance for your help! Best, Lau

My App is live on app store , user are using it with iPhone 16 pro max and they are getting Operation Stopped while combining videos and audios only specifically on iPhone 16 pro max , on every other device its working fine. And When i adding AVAssetExportPresetPassthrough it able to combine videos and audios but not respecting the encoding and without audio. NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:composition]; if ([compatiblePresets containsObject:AVAssetExportPresetHighestQuality]) { presetName = AVAssetExportPresetHighestQuality; } else if ([compatiblePresets containsObject:AVAssetExportPreset1920x1080]) { presetName = AVAssetExportPreset1920x1080; } else if ([compatiblePresets containsObject:AVAssetExportPreset1280x720]) { presetName = AVAssetExportPreset1280x720; } else { presetName = AVAssetExportPresetPassthrough; } } else { presetName = AVAssetExportPreset1280x720; }

Hi everyone, I’ve encountered an issue with the showsPlaybackControls property in AVPlayerViewController after updating to iOS 18. Even though it’s set to true, the native playback controls (play, pause, etc.) are no longer appearing as they used to in previous iOS versions. This behavior was consistent and worked perfectly prior to iOS 18. Additionally, I’m seeing the same problem when using the VideoPlayer in SwiftUI. The native controls that should appear by default seem to have vanished after the update. Has anyone else experienced this? Is there any workaround or additional configuration required to restore the native controls? Any help or insights would be appreciated. Thanks! struct CustomPlayerView: UIViewControllerRepresentable { let player: AVPlayer func updateUIViewController(_ playerController: AVPlayerViewController, context: Context) { playerController.player = player playerController.showsPlaybackControls = true player.play() } func makeUIViewController(context: Context) -> AVPlayerViewController { return AVPlayerViewController() } }

I am developing an iOS app that uses YOLOv8 for object detection and aims to detect objects at 60 FPS using the UltraWide camera. My goal is to process every frame within captureOutput and utilize the detected data (such as coordinates) for each one. I have a question regarding how background thread processing behaves in this scenario. Does the size of the YOLO model (n, s, m, etc.) or the weight of the operations inside captureOutput affect the number of frames that can be successfully processed? Specifically, I would like to know if all frames will be processed sequentially with a delay due to heavy processing in the background, or if some frames will be dropped and not processed at all. Any insights on how to handle this would be greatly appreciated. Thank you!

I have an intra-**** video device that's supported by Apple's AVCaptureDevice. I can use the AV classes to connect to the device and get video. However, this device has a button that's used to acquire still images from the video stream. I can't use the IOUSBDeviceInterface to do an asynchronous read, because the Apple driver has the device opened exclusively. How do I go about receiving the button event in this scenario? I know which pipe to read, based on a bus analyzer when I run this on Windows, I just need to know how to access that pipe when the device is opened by another process.

I have using the Destination Video sample project as a template to recreate a similar project. I have been able to update all text and images but when I go to change out the videos, it still plays the old videos. If I rename the new video to the old video name, the new video appears. Problem is, there are only two videos that repeat on different links. But changing the URLs in SampleData.swift to the new file path does not work. Any suggestions on how to replace a video with a newly imported asset? Here is an example of the code. Video( id: 1, name: "Landing", synopsis: """ After a long journey through the stars, the robot botanist and its trusty spaceship finally arrive at Wolf 1069 B, ready to explore the mysteries that lie on the planet’s surface. New plants to catalog, new animals to discover, and cool rocks to unearth. Follow along as the botanist’s mission begins! """, categoryIDs: [ 1004, 1005 ], url: URL(string: "file://BOT-anist_video.mov")!, imageName: "landing", yearOfRelease: 2024, duration: 66, contentRating: "NR", isFeatured: true ),

I am trying to play HLS videos on my iPhone app and I see frequent glitch on the video, it is not happening with MP4. https://drive.google.com/file/d/1lhdpHTyjPYCYLHjzvb6ZF6P6jehIuwY0/view?usp=sharing.

We have observed consistent glitches in video playback when using AVPlayer to stream HLS (HTTP Live Streaming) videos on iOS. The issue manifests as intermittent frame drops, stuttering, and playback instability during HLS streams. However, the same behavior is not present when playing MP4 videos using the same AVPlayer instance. The HLS streams being used follow standard encoding practices, and network conditions have been ruled out as a cause for this problem. https://drive.google.com/file/d/1lhdpHTyjPYCYLHjzvb6ZF6P6jehIuwY0/view?usp=sharing Steps to Reproduce: 1. Load an HLS video into AVPlayer and initiate playback. 2. Observe intermittent glitches and stuttering during video playback. 3. Load and play an MP4 video in the same AVPlayer instance. 4. Notice that MP4 playback is smooth without any glitches.

The app needs to play remote videos. Sometimes it takes very long time (~10 seconds) to load the media and play with AVPlayer. So I use a timer to check and try to play next video if it is over 5 seconds: AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoUrl options:nil];// line 1 NSArray *keys = @[@"playable"]; mediaLoaded = NO; [asset loadValuesAsynchronouslyForKeys:keys completionHandler:^() { // line 2 mediaLoaded = YES; // line 4 dispatch_async(dispatch_get_main_queue(), ^{ [self.player replaceCurrentItemWithPlayerItem:[AVPlayerItem playerItemWithAsset:asset]]; [self.player playImmediatelyAtRate:playSpeed]; }); }]; dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ if (!mediaLoaded) { [self playNextVideo]; // line 3 } }); So the flow is: line 1 (of video 1)- line 2 (of video 1)- line 3 (if over 5 seconds and video 1 is not playing)- line 1 (of video 2)-... Now the problem is that seems line 2 is blocking line 1: only line 4 (for video 1 after ~10 seconds) or the completionHandler is executed will line 2 (for video 2) will be executed. Anybody can give any insight? Thx!

Hi, I'm recording videos frame by frame and occasionally a sound plays (from an MP3 asset). I want to composite these sounds into the video at the correct timings. But this doesn't work. Really pulling my hair out here. I've tried everything, including adding one after another and then inserting silence in between (allegedly this pushes subsequent clips back) but nothing works. Here, _currentTime is the current time according to the video frames added, which are added at 20Hz. You can see I am adding silence long enough to cover the time from the end of the last audio clip to now, plus extra padding to contain the audio we are about to add. Doesn't matter if I remove this, it just doesn't work. Sometimes I can get two pieces of audio to play but never a third and usually, only the first audio plays, and then nothing after. I'm completely stumped. func addFrame(_ pixelBuffer: CVPixelBuffer) { guard CGSize(width: pixelBuffer.width, height: pixelBuffer.height) == _outputSize else { return } let frameTime = CMTimeMake(value: Int64(_frameCount), timescale: _frameRate) if _videoInput?.isReadyForMoreMediaData == true { _pixelBufferAdaptor?.append(pixelBuffer, withPresentationTime: frameTime) _frameCount += 1 _currentTime = frameTime } } func addMP3AudioClip(_ audioData: Data) async throws { let tempURL = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString + ".mp3") try audioData.write(to: tempURL) let asset = AVAsset(url: tempURL) let duration = try await asset.load(.duration) let audioTrack = try await asset.loadTracks(withMediaType: .audio).first! let currentAudioTime = _currentTime.convertScale(duration.timescale, method: .default) _audioTrack?.insertEmptyTimeRange(CMTimeRangeFromTimeToTime(start: _lastAudioClipEndTime, end: currentAudioTime)) _audioTrack?.insertEmptyTimeRange(CMTimeRangeFromTimeToTime(start: currentAudioTime, end: CMTimeAdd(currentAudioTime, duration))) let timeRange = CMTimeRangeMake(start: .zero, duration: duration) try _audioTrack?.insertTimeRange(timeRange, of: audioTrack, at: currentAudioTime) _lastAudioClipEndTime = CMTimeAdd(currentAudioTime, duration) try FileManager.default.removeItem(at: tempURL) _audioClipTimeRanges.append(CMTimeRangeMake(start: _currentTime, duration: duration)) } Thank you, -- B.

When update as IOS18 , Display automatically dims while the iPhone is video calling with LINE and it is stabilizing.

Hello, I used following technical note to develop app that record mov file with SMPTE timecode. https://developer.apple.com/library/archive/technotes/tn2310/_index.html As result, a timecode track is present within .mov file (other tracks are audio and video) Unfortunately, QuickTime Player doesn't display timecode information. Analyser tools like mediainfo or online service as https://media-analyzer.pro/app show that timecode track has null duration (and so no "time code of last frame" example n° of TC track : Other ID : 3 Type : Time code Format : QuickTime TC Frame rate : 60.000 FPS Time code of first frame : 17:39:59:00 Time code, stripped : Yes Title : Core Media Time Code Encoded date : 2024-09-10 15:39:46 UTC Tagged date : 2024-09-10 15:39:59 UTC example 2 of Timecode track : 0000569562Quicktime Timecode #0 00007f6b8a'trak' Track atom #1 00007f6b92'tkhd' Track header atom #2 size 92 (0x5C) type 'tkhd' (hex 74 6B 68 64) version 0 flags 15 (0xF) creation_time 0xE30618C2, '2024-09-10 15:39:46' modification_time 0xE30618CF, '2024-09-10 15:39:59' track_ID 3 reserved 0 duration 0 reserved [0, 0] In each case, duration is considered as null even if the record's duration is more than 20s. STEPS TO REPRODUCE Use AVAssetWriter for video and audio. Create AVAssetWrite for timecode and associate it with video track. Just before stopping record, a sample buffer containing SMPTE is generated and added. All track are marked as finished before stopping the record with finishWritingWithCompletionHandler.

I have an app that lets the user draw a circle or line over a live video feed. There’s a view for circles and a view for lines. These are displayed in ContentView and their position in the ZStack is altered based on the toolbar section by the user. Whichever view is on top of the stack is active and usable. That all works fine but I want the user to be able to select any shape on screen whether it is a circle or line. My question is what is best practice to manage tool selection and drawing the shapes? I’m guessing I should draw all shapes onto one view but I would like to avoid this as I have all my logic in each shapes respective view.

I have a Mac Catalyst video conferencing app that streams video using AVCaptureMultiCamSession. Everything has been working well for me in a variety of scenarios and hardware, but recently I got a report that virtual cameras / camera extensions do not seem to work - which I can reproduce 100% of the time by using something like OBS's virtual camera. FaceTime and Photo Booth work okay with these virtual cameras. Although my app can see and add the external AVCaptureDevice, I get an AVCaptureSessionRuntimeError posted when I start the session with a connection between the virtual camera and a AVCaptureVideoDataOutput (I don't get the error if I don't connect or add an output). The posted error is AVUnknown: AVCaptureSessionRuntimeErrorNotification with Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-12780), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x600001dcd680 {Error Domain=NSOSStatusErrorDomain Code=-12780 "(null)"}} Which doesn't tell me too much. I do see some fig assertions just above in Console though: <<<< BWMultiStreamCameraSourceNode >>>> Fig assert: "err == 0 " at bail (BWMultiStreamCameraSourceNode.m:3964) - (err=-12780) <<<< BWMultiStreamCameraSourceNode >>>> Fig assert: "err == 0 " at bail (BWMultiStreamCameraSourceNode.m:1591) - (err=-12780) <<<< BWMultiStreamCameraSourceNode >>>> Fig assert: "err == 0 " at bail (BWMultiStreamCameraSourceNode.m:1418) - (err=-12780) <<<< FigCaptureCameraSourcePipeline >>>> Fig assert: "err == 0 " at bail (FigCaptureCameraSourcePipeline.m:3572) - (err=-12780) <<<< FigCaptureCameraSourcePipeline >>>> Fig assert: "err == 0 " at bail (FigCaptureCameraSourcePipeline.m:4518) - (err=-12780) <<<< FigCaptureCameraSourcePipeline >>>> Fig assert: "err == 0 " at bail (FigCaptureCameraSourcePipeline.m:483) - (err=-12780) I've verified formats are sane (the usual 420v 1080p 30fps I have everywhere else) and data output functions and such, but I'm a bit stuck as to where to go from here. One thing that did stand out is that in the AVCamBarcode example I can see the virtual camera in that app's preview layer, but if I create an AVCaptureVideoDataOutput and add it to the session in that example, it fails in what looks like exactly the same way that my app does, with the same assertions. Does anyone have any advice? Thanks!

Hi Team, When we select the screen Timing option and if the screen limit is exists for the day limit we have an option to click Ignore Limit—-> Ignore limit for today. After we select this option, suppose if we are watching any videos via Third party apps (YouTube) at that moment it got hang after we clicked multiple times the play button the video started to play but the volume is not working, again if we click previous or forward button then only the sounds are coming. Kindly look into this issue and address it. Thanks, Pemkumar S

I am working on a macOS app that uses AVFoundation to record the screen. During a recording if I make a window full screen, AVFoundation stops capturing screen frames (or does it at a very slow rate). In my logs I get the following error: Error Domain=AVFoundationErrorDomain Code=-11844 note that I have had instances where I could not reproduce the error but they were rare. The screen recording sometimes resumes normally if I switch desktops or minimize the full screen window. Did anyone ever run across a similar issue or knows how to fix it ?

When in Final Cut Pro/Logic/Compressor/Motion, the command set is set to German, there is no way to set it to English.

Hello all, This is my first post on the developer forums. I am developing an app that records the screen of my app, using AVAssetWriter and RPScreenRecorder startCapture. Everything is working as it should on most cases. There are some seemingly random times where the file generated is of some kb and it is corrupted. There seems to be no pattern on what the device is or the iOS version is. It can happen on various phones and iOS versions. The steps I have followed in order to create the file are: configuring the AssetWritter videoAssetWriter = try? AVAssetWriter(outputURL: url!, fileType: AVFileType.mp4) let size = UIScreen.main.bounds.size let width = (Int(size.width / 4)) * 4 let height = (Int(size.height / 4)) * 4 let videoOutputSettings: Dictionary<String, Any> = [ AVVideoCodecKey : AVVideoCodecType.h264, AVVideoWidthKey : width, AVVideoHeightKey : height ] videoInput = AVAssetWriterInput(mediaType: AVMediaType.video, outputSettings: videoOutputSettings) videoInput?.expectsMediaDataInRealTime = true guard let videoInput = videoInput else { return } if videoAssetWriter?.canAdd(videoInput) ?? false { videoAssetWriter?.add(videoInput) } let audioInputsettings = [ AVFormatIDKey: Int(kAudioFormatMPEG4AAC), AVSampleRateKey: 12000, AVNumberOfChannelsKey: 1, AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue ] audioInput = AVAssetWriterInput(mediaType: .audio, outputSettings: audioInputsettings) audioInput?.expectsMediaDataInRealTime = true guard let audioInput = audioInput else { return } if videoAssetWriter?.canAdd(audioInput) ?? false { videoAssetWriter?.add(audioInput) } The urlForVideo returns the URL to the documentDirectory, after appending and creating the folders needed. This part seems to be working as it should as the directories are created and the video file exists on them. Start the recording if RPScreenRecorder.shared().isRecording { return } RPScreenRecorder.shared().startCapture(handler: { [weak self] sample, bufferType, error in if let error = error { onError?(error.localizedDescription) } else { if (!RPScreenRecorder.shared().isMicrophoneEnabled) { RPScreenRecorder.shared().stopCapture { error in if let error = error { return } } onError?("Microphone was not enabled") } else { succesCompletion?() succesCompletion = nil self?.processSampleBuffer(sample, with: bufferType) } } }) { error in if let error = error { onError?(error.localizedDescription) } } Process the sampleBuffers guard CMSampleBufferDataIsReady(sampleBuffer) else { return } DispatchQueue.main.async { [weak self] in switch sampleBufferType { case .video: self?.handleVideoBaffer(sampleBuffer) case .audioMic: self?.add(sample: sampleBuffer, to: self?.audioInput) self?.audioInput) default: break } } // The add function from above fileprivate func add(sample: CMSampleBuffer, to writerInput: AVAssetWriterInput?) { if writerInput?.isReadyForMoreMediaData ?? false { writerInput?.append(sample) } // The handleVideoBaffer function from above fileprivate func handleVideoBaffer(_ sampleBuffer: CMSampleBuffer) { if self.videoAssetWriter?.status == AVAssetWriter.Status.unknown { self.videoAssetWriter?.startWriting() self.videoAssetWriter?.startSession(atSourceTime: CMSampleBufferGetPresentationTimeStamp(sampleBuffer)) } else { if (self.videoInput?.isReadyForMoreMediaData) ?? false { if self.videoAssetWriter?.status == AVAssetWriter.Status.writing { self.videoInput?.append(sampleBuffer) } } } } } Finally the stop recording func stopRecording(completion: @escaping (URL?, URL?, Error?) -> Void) { RPScreenRecorder.shared().stopCapture { error in if let error = error { completion(nil, nil, error) return } self.finish { videoURL, _ in completion(videoURL, nil, nil) } } } // The finish function mentioned above fileprivate func finish(completion: @escaping (URL?, URL?) -> Void) { let dispatchGroup = DispatchGroup() dispatchGroup.enter() finishRecordVideo { dispatchGroup.leave() } dispatchGroup.notify(queue: .main) { print("Finish with url:\(String(describing: self.urlForVideo()))") completion(self.urlForVideo(), nil) } } // The finishRecordVideo mentioned above fileprivate func finishRecordVideo(completion: @escaping ()-> Void) { videoInput?.markAsFinished() audioInput?.markAsFinished() videoAssetWriter?.finishWriting { if let writer = self.videoAssetWriter { if writer.status == .completed { completion() } else if writer.status == .failed { // Print the error to find out what went wrong if let error = writer.error { print("Video asset writing failed with error: \(error.localizedDescription). Url: \(writer.outputURL.path)") } else { print("Video asset writing failed, but no error description available.") } completion() }else { completion() } } } } What could it be the reason of the corrupted files generated? This issue has never happened to my devices so there is no way to debug using xcode. Also there are no errors popping out on the logs. Can you spot any issues on the code that can create this kind of issue? Do you have any suggestions on the problem at hand? Thanks