Hey. I am trying to create a present view with a bunch of media (images/videos). Right now I am using a ZStack to render each media and change opacity based on the index selected using a scrollView. The issue seems to be that sometimes, videos don't seem to load in the main slide. There is a slide created as the video exists, the Player shows controls too but doesn't play anything. Present View Z-Stack ZStack { ForEach(presentation.slides.indices, id: .self) { index in if let media = mediaCacheManager.mediaCache[index] { if let player = media as? AVPlayer { PlayerView(player: player) .aspectRatio(16/10, contentMode: .fit ) .frame(width: UIScreen.main.bounds.width * 0.8) .background(Color.gray.opacity(0.2)) .clipShape(RoundedRectangle(cornerRadius: 40)) .overlay( RoundedRectangle(cornerRadius: 40) .stroke(Color.gray.opacity(0.5), lineWidth: 1) ) .onDisappear { player.pause() } .opacity(appModel.currentSlide == index ? 1 : 0) } else if let image = media as? Image { image .resizable() .scaledToFit() .frame(width: UIScreen.main.bounds.width * 0.8) .background(Color.gray.opacity(0.2)) .clipShape(RoundedRectangle(cornerRadius: 40)) .overlay( RoundedRectangle(cornerRadius: 40) .stroke(Color.gray.opacity(0.5), lineWidth: 1) ) .padding(.vertical, 10) .opacity(appModel.currentSlide == index ? 1 : 0) } } } } The PlayerView public class PlayerUIView: UIView { let playerVC = AVPlayerViewController() let gravity: AVLayerVideoGravity let manageAudio: Bool override init(frame: CGRect) { self.gravity = .resizeAspectFill self.manageAudio = true super.init(frame: frame) } deinit { if manageAudio { try? AVAudioSession.sharedInstance().setActive(false) } } init(player: AVPlayer?, gravity: AVLayerVideoGravity, manageAudio: Bool = true) { self.gravity = gravity self.manageAudio = manageAudio super.init(frame: .zero) guard let player = player else { return } self.playerSetup(player: player) } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } public override func layoutSubviews() { super.layoutSubviews() playerVC.view.frame = bounds playerVC.view.backgroundColor = .clear playerVC.allowsVideoFrameAnalysis = false } private func playerSetup(player: AVPlayer) { playerVC.updatesNowPlayingInfoCenter = true playerVC.player = player playerVC.showsPlaybackControls = true playerVC.view.backgroundColor = .clear playerVC.exitsFullScreenWhenPlaybackEnds = true playerVC.videoGravity = gravity self.addSubview(playerVC.view) } }

We have a universal iOS/tvOS app that also supports iOS App on Mac. In our AVPlayer-based video player we support AirPlay with AVRouteDetector and AVRoutePickerView. We play HLS streams. When we try to AirPlay from an iOS device to an Apple TV or a Mac that has our app installed, it doesn't work. The receiver is marked as active in the route picker UI but the video doesn't show up on the receiver and playback stops. When our app isn't installed on the receiver device, everything works as expected. Has anyone encountered the same issue? Any solutions available for this?

The media services used for HLS streaming in an AVPlayer seem to crash if your segments are too large. Anything over 20Mbps seems to cause a crash. I have tried adjusting the segment length to 1 second also and it didn't help. I am remuxing Dolby Vision and HDR video and want to avoid transcoding and losing any metadata. However the segments are too large. Is there a workaround for this? Otherwise it seems AVFoundation is not suited to high bitrate HLS and I should be using MPV or similar.

I am recording video on iOS using ReplayKit and found that after copying data in the processSampleBuffer:withType: callback using memcpy, the data changes. This occurs particularly frequently when the screen content changes rapidly, making it look like the frames are overlapping. I found that the values starting from byte 672 in the video data on my device often change. Here is the test demo: - (void)processSampleBuffer:(CMSampleBufferRef)sampleBuffer withType:(RPSampleBufferType)sampleBufferType { switch (sampleBufferType) { case RPSampleBufferTypeVideo: { CVPixelBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); CVPixelBufferLockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly); int ret = 0; uint8_t *oYData = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0); size_t oYSize = CVPixelBufferGetHeightOfPlane(pixelBuffer, 0) * CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0); uint8_t *oUVData = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1); size_t oUVSize = CVPixelBufferGetHeightOfPlane(pixelBuffer, 1) * CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 1); if (oYSize <= 672) { return; } uint8_t tempValue = oYData[672]; uint8_t *tYData = malloc(oYSize); memcpy(tYData, oYData, oYSize); if (tYData[672] != oYData[672]) { NSLog(@"$$$$$$$$$$$$$$$$------ t:%d o:%d temp:%d", tYData[672], oYData[672], tempValue); } free(tYData); CVPixelBufferUnlockBaseAddress(pixelBuffer, kCVPixelBufferLock_ReadOnly); break; } default: { break; } } } Output: $$$$$$$$$$$$$$$$------ t:110 o:124 temp:110 $$$$$$$$$$$$$$$$------ t:111 o:133 temp:111 $$$$$$$$$$$$$$$$------ t:124 o:138 temp:124 $$$$$$$$$$$$$$$$------ t:133 o:144 temp:133 $$$$$$$$$$$$$$$$------ t:138 o:151 temp:138 $$$$$$$$$$$$$$$$------ t:144 o:156 temp:144 $$$$$$$$$$$$$$$$------ t:151 o:135 temp:151 $$$$$$$$$$$$$$$$------ t:156 o:78 temp:156 $$$$$$$$$$$$$$$$------ t:135 o:76 temp:135 $$$$$$$$$$$$$$$$------ t:78 o:77 temp:78 $$$$$$$$$$$$$$$$------ t:76 o:80 temp:76 $$$$$$$$$$$$$$$$------ t:77 o:80 temp:77 $$$$$$$$$$$$$$$$------ t:80 o:79 temp:80 $$$$$$$$$$$$$$$$------ t:79 o:80 temp:79

I’m using AVFoundation in my iPhone application to encode a video in MP4 format with H.264, which can then be shared or exported. Do I need to pay a license for using the H.264 format to MPEG LA? Or are these fees already covered by Apple? I’ve read articles suggesting that Apple covers these fees when encoding is done through its native APIs (or via its dedicated encoding hardware components), but I haven’t found any explicit confirmation of this point in the various documentation or contracts... Did I miss something?

When is playbackBufferEmpty triggered? Why is this property YES observed from the observer method when returning to the foreground from the background even if the buffer is not empty?

Hello, I will use AVFoundation's AVAssetWriter and AVPlayer for H.264 and H.265 encoding and decoding in my app. It will be used commercially, so I would like to know if I need to pay any licensing fees for H.264 and H.265 encoding and decoding.

I am making an app that can two two videos, and then stitch them together on the screen (one video on top half and the other on bottom half). This is achieved with AVMutableComposition, and then I am using AVAssetExportSession to export a mp4 file out: guard let export = AVAssetExportSession(asset: composition, presetName: AVAssetExportPreset1920x1080) else { return } export.exportAsynchronously { .... When the two input videos are around 1GB each, starting the export session immediately increases memory usage by ~2GB, as if it moves the input files into memory immediately (my guess), and at some point my app is killed for using too much memory. Is there a way to avoid this upfront memory usage and/or avoid getting killed?

I observe significant performance differences when encoding a video in mp4 format (H264). The code I use is standard (using AVAssetWriter, AVAssetWriterInput...). Here is what I notice when I run the same code on different platforms: On an iPhone, the video is encoded in 3 seconds (iPhone 13, 14, 15, 16, Pro...). On a Mac equipped with an M2 Pro, the video is encoded in 50 seconds. On a Mac equipped with an Intel processor (2,3 GHz Intel Xeon W 18 cœurs), the video is encoded in 2 minutes. The encoding on an iPhone is very fast due to hardware acceleration. However, I don’t understand why I don’t get similar performance with a Mac M2 Pro, which is equipped with a dedicated component for hardware acceleration (H264 media engine)? Is hardware acceleration disabled on a Mac?

I had no luck to compile a sample code provided by apple with Xcode 16.0 beta 5. ScreenCaptureKit demo (https://developer.apple.com/documentation/screencapturekit/capturing_screen_content_in_macos) The part it is failling is, streamOutput.capturedFrameHandler = { continuation.yield($0) } And the error message is Sending '$0' risks causing data races Task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses Please enlighten me why this is an issue and how to avoid? Thanks in advance!

We captured a spatial video with iPhone 15 pro. When we try to export the video with AVAssetExportSession and AVAssetExportPresetMVHEVC960x960 it always go failed state and exportSession.error?.localizedDescription yield "Operation Stopped" error. Code implementation is straight forward .. other HEVC file works well.This problem occurred with only mv-hevc file. func exportSpatialVideo(videoFilePath: String, outputUrl: URL){ let url:URL? = URL(fileURLWithPath: videoFilePath) let asset: AVAsset = AVAsset(url:url!) print(asset.description) print(asset.tracks.first?.mediaType.rawValue) let preset = "AVAssetExportPresetMVHEVC960x960" let exportSession:AVAssetExportSession = AVAssetExportSession(asset: asset, presetName: preset)! exportSession.outputURL = outputUrl exportSession.shouldOptimizeForNetworkUse = true exportSession.outputFileType = AVFileType.mov exportSession.exportAsynchronously(completionHandler: { switch exportSession.status { case .unknown: print("Unknown Error") case .waiting: print( "waiting ... ") case .exporting: print( "exporting ...") case .completed: print( "completed.") case .failed: print("failed.\(String(describing: exportSession.error?.localizedDescription))") case .cancelled: } }) } is there any solution for it ?

In iOS, when I use AVPlayerViewController to play back a slow motion video, it has a "ramp-up" stage at the start and a "ramp-down" stage at the end, and the video plays at the normal speed (i.e. not slow motion) during these stages. My question is: are these non-slow-motion stages defined in the video file itself? (e.g. some kind of meta data?) Or, is it just a playback approach used by AVPlayerViewController ? Thanks!

Hi all, I'm working on a particle system. Got it to work using drawn circles. Now I want to replace the circle with an image. Trying to do so in Draw section, but not sure if that's the right place. Any suggestions for coding to: connect the image from BIN to Xcode to replace particles with the image(s). Kindly ty

I think I have the simplest possible Mac app trying to see if I can have VideoPlayer work in an Xcode Preview. It works in an iOS app project. In a Mac app project it builds and runs. But if I preview in Xcode it crashes. The diagnostic says: | [Remote] Unknown Error: The operation couldn’t be completed. XPC error received on message reply handler | | BSServiceConnectionErrorDomain (3): | ==NSLocalizedFailureReason: XPC error received on message reply handler | ==BSErrorCodeDescription: OperationFailed The code I'm using is the exact code from the VideoPlayer documentation page. See this link. Any ideas about this XPC error, and how to work around? I'm using Xcode 16.0 on macOS 14.6.1

Hi, trying to wrap my head around Xcode's FXPlug. I already sell Final Cut Pro titles for a company. These titles were built in motion. However, they want me to move them to an app and I'm looking for any help on how to accomplish this *What the app should do is: Allow users with an active subscription to our website the ability to access titles within FCPX and if they are not an active subscriber, for access to be denied.

Hi, Could you please explain how to use SF Symbols animations in Final Cut? I would greatly appreciate your help. Thank you!

I have generated FCPXML, but i can't figure out issue: <?xml version="1.0"?> <fcpxml version="1.11"> <resources> <format id="r1" name="FFVideoFormat3840x2160p2997" frameDuration="1001/30000s" width="3840" height="2160" colorSpace="1-1-1 (Rec. 709)"/> <asset id="video0" name="11a(1-5).mp4" start="0s" hasVideo="1" videoSources="1" duration="6.81s"> <media-rep kind="original-media" src="file:///Volumes/Dropbox/RealMedia Dropbox/Real Media/Media/Test/Test AE videos, City, testOLOLO/video/11a(1-5).mp4"/> </asset> <asset id="video1" name="12(4)r8 mute.mp4" start="0s" hasVideo="1" videoSources="1" duration="9.94s"> <media-rep kind="original-media" src="file:///Volumes/Dropbox/RealMedia Dropbox/Real Media/Media/Test/Test AE videos, City, testOLOLO/video/12(4)r8 mute.mp4"/> </asset> <asset id="video2" name="13 mute.mp4" start="0s" hasVideo="1" videoSources="1" duration="6.51s"> <media-rep kind="original-media" src="file:///Volumes/Dropbox/RealMedia Dropbox/Real Media/Media/Test/Test AE videos, City, testOLOLO/video/13 mute.mp4"/> </asset> <asset id="video3" name="13x (8,14,24,29,38).mp4" start="0s" hasVideo="1" videoSources="1" duration="45.55s"> <media-rep kind="original-media" src="file:///Volumes/Dropbox/RealMedia Dropbox/Real Media/Media/Test/Test AE videos, City, testOLOLO/video/13x (8,14,24,29,38).mp4"/> </asset> </resources> <library> <event name="Untitled"> <project name="Untitled Project" uid="28B2D4F3-05C4-44E7-8D0B-70A326135EDD" modDate="2024-04-17 15:44:26 -0400"> <sequence format="r1" duration="4802798/30000s" tcStart="0s" tcFormat="NDF" audioLayout="stereo" audioRate="48k"> <spine> <asset-clip ref="video0" offset="0/10000s" name="11a(1-5).mp4" duration="0/10000s" format="r1" tcFormat="NDF"/> <asset-clip ref="video1" offset="12119/10000s" name="12(4)r8 mute.mp4" duration="0/10000s" format="r1" tcFormat="NDF"/> <asset-clip ref="video2" offset="22784/10000s" name="13 mute.mp4" duration="0/10000s" format="r1" tcFormat="NDF"/> <asset-clip ref="video3" offset="34544/10000s" name="13x (8,14,24,29,38).mp4" duration="0/10000s" format="r1" tcFormat="NDF"/> </spine> </sequence> </project> </event> </library> </fcpxml> Any ideas?

Hello everyone, I have been receiving this same crash report for the past month whenever I try and export a Final Cut Pro project. The FCP video will get to about 88% completion of export, then the application crashes and I get the attached report. Any leads on how to fix this would be greatly appreciated! Thank you. -Lauren

1.在Fxplug4.3的 FxRemoteWindowAPI 的协议中，没有提供window.frame.origin的设置。 2.如果我自定义NSWindow时，在FxPlug中 [Window setLevel:NSFloatingWindowLevel];也没有执行。 3.请问我应该如何把窗口保留在Final cut pro的前面，并且不影响Final cut pro 的操作呢？

NSPanel *panel = [[myPanel alloc] initWithContentRect:NSMakeRect(100, 100, 400, 300) styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable backing:NSBackingStoreBuffered defer:NO]; [panel setLevel:NSFloatingWindowLevel];//无效？？？？ [panel makeKeyAndOrderFront:self]; 问题：在FxPlug4.3中使用setLevel不能将panel放在Final cut pro和Mition的前面？ 救命～～～全世界都没找到答案！