Here is the process in My application.Mic -> AVCaptureOutput -> Audio(PCM) -> Audio Encoder -> AAC Packet (Encoded)Camera -> AVCaptureOutput -> Image -> Video Encoder -> H.264 Video Packet.(Encoded)So, My App is Movie Encoder.Crash is happened when camera is switched. (Front Camera <-> Back Camera)Crash line is AudioConverterFillComplexBuffer.maybe NativeInt16ToFloat32Scaled_ARM..what does that mean??? why???0 AudioCodecs 0x0000000183fbe2bc NativeInt16ToFloat32Scaled_ARM + 1321 AudioCodecs 0x0000000183f63708 AppendInputData(void*, void const*, unsigned int*, unsigned int*, AudioStreamPacketDescription const*) + 562 AudioToolbox 0x000000018411aaac CodecConverter::AppendExcessInput(unsigned int&) + 1963 AudioToolbox 0x000000018411a59c CodecConverter::EncoderFillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*) + 6604 AudioToolbox 0x0000000184124ec0 AudioConverterChain::RenderOutput(CABufferList*, unsigned int, unsigned int&, AudioStreamPacketDescription*) + 1165 AudioToolbox 0x0000000184100d98 BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*) + 4446 AudioToolbox 0x00000001840d8c9c AudioConverterFillComplexBuffer + 3407 MovieEncoder 0x0000000100341fd4 __49-[AACEncoder encodeSampleBuffer:completionBlock:]_block_invoke (AACEncoder.m:247)

I have a UICollectionView to display photos from a device's album with the Photos framework. The photos are correctly displayed, but if I scroll fast (like when you tape at the top of the screen to go to the top of the collectionView), I have some photos which are not at the good indexPath. I just need to scroll a bit to put the bad photo out of the screen, and everything go back in place.I clean the cell during prepareForReuse by canceling the current request.I presume it's a problem with the asynchronous request of PHImageManager, but I don't know how to avoid this problem. And I want to keet the asynchronous request to keep the collectionView smooth.Here some code :View Controller extension AlbumDetailViewController : UICollectionViewDataSource { func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int { return 1 } func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return photoList.count } func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCellWithReuseIdentifier("PhotoCell", forIndexPath: indexPath) as! PhotoCollectionCell cell.setImage(photoList.objectAtIndex(indexPath.row) as! PHAsset) return cell } }Custom CollectionViewCell class PhotoCollectionCell: UICollectionViewCell { @IBOutlet weak var imageView: UIImageView! var requestId: PHImageRequestID! let manager = PHImageManager.defaultManager() override func awakeFromNib() { super.awakeFromNib() // Initialization code } override func prepareForReuse() { self.imageView.image = nil manager.cancelImageRequest(self.requestId) } func setImage(asset: PHAsset) { let option = PHImageRequestOptions() option.resizeMode = .Fast option.deliveryMode = .HighQualityFormat self.requestId = manager.requestImageForAsset(asset, targetSize: CGSize(width: self.frame.size.width * UIScreen.mainScreen().scale, height: self.frame.size.height * UIScreen.mainScreen().scale), contentMode: PHImageContentMode.Default, options: option, resultHandler: {(result, info)->Void in self.imageView.image = result }) } }Thank you

So, I've never faced a problem like this for so long. I have basically scrutinized every possible website on the internet looking for a solution but have found nothing so far.I have a custom picker controller in which I can select videos and play them. Beforehand, I was struggling to play slow motion videos (only no-slow-motion videos were playing) but after searching I found the solution here.http://stackoverflow.com/questions/26152396/how-to-access-nsdata-nsurl-of-slow-motion-videos-using-photokitSo, my code to get videos became this:let videoOptions = PHVideoRequestOptions() videoOptions.version = PHVideoRequestOptionsVersion.Original PHImageManager.defaultManager().requestAVAssetForVideo(asset!, options: videoOptions , resultHandler: { (asset, audioMix, info) -> Void in if let asset = asset as? AVURLAsset { let videoData = NSData(contentsOfURL: asset.URL) let videoPath = NSTemporaryDirectory() + "tmpMovie.MOV" let videoURL = NSURL(fileURLWithPath: videoPath) let writeResult = videoData?.writeToURL(videoURL, atomically: true) if let writeResult = writeResult where writeResult { print("success") let videoVC = VideoViewController(videoUrl: videoURL) imagePicker.presentViewController(videoVC, animated: false, completion: nil) } else { print("failure") } } }) Now, slow motion videos are playing but in a normal way instead of in a slow-motion way. This questions relates to the problem.https://devforums.apple.com/message/903937#903937I've seen a lot of comments saying they solved the problem by using Photos framework, but I have no idea how to achieve this and they didn't explain either. It might be something to do PHAssetMediaSubtypeVideoHighFrameRate. So, how would be possible to play slow motion videos? Do I need to change the fps somehow?Please help, I am quite desperate :/ Objective-C code is welcome as well.

I'm trying to do some realtime audio processing on audio served from an HLS stream (i.e. an AVPlayer created using an M3U HTTP URL). It doesn't seem like attaching an AVAudioMix configured with with an `audioTapProcessor` has any effect; none of the callbacks except `init` are being invoked. Is this a known limitation? If so, is this documented somewhere?If the above is a limitation, what are my options using some of the other audio APIs? I looked into `AVAudioEngine` as well but it doesn't seem like there's any way I can configure any of the input node types to use an HLS stream. Am I wrong? Are there lower level APIs available to play HLS streams that provide the necessary hooks?Alternatively, is there some generic way to tap into all audio being output by my app regardless of its source?Thanks a lot!

I am currently working with AVAssetWriterInput with interlaced source.I want to know the proper procedure to preserve 'fiel' format description extension through AVAssetWriterInput compression operation.Do you anyone have an answer on this?>>Technical Note TN2162>>Uncompressed Y´CbCr Video in QuickTime Files>>The 'fiel' ImageDescription Extension: Field/Frame Information//What I have tried is following:First decode into sample buffer with Field/Frame information- Decode DV-NTSC source and get current FieldCount/Detail of source data- Create a kCVPixelFormatType_422YpCbCr8 CVImageBuffer from source- CMSetAttachments() kCVImageBufferFieldCountKey/kCVImageBufferFieldDetailKey with FieldCount=2/FieldDetail=14 to imageBuffer, same as DV-NTSC source- CMVideoFormatDescriptionCreateForImageBuffer()- CMSampleBufferCreateForImageBuffer()- Now decompressed samplebuffer has kCMFormatDescriptionExtension_FieldXXX same as sourceSecond encode using ProRes422- Next I create AVAssetWriterInput to transcode from _422YpCbCr8 into AVVideoCodecAppleProRes422- Now AVAssetWriter can produce ProRes422 mov file, but it does not contain the format description extension 'fiel'.- ProRes422 Encoder does preserve 'colr', 'pasp', 'clap' same as source, but no 'fiel' is there.I have also tried to serve format description with kCMFormatDescriptionExtension_FieldXXX with initWithMediaType:outputSettings:sourceFormatHint:but no success.//

Hi,I'm having two problems using the scheduleBuffer function of AVAudioPlayerNode.Background: my app generates audio programatically, which is why I am using this function. I also need low latency. Therefore, I'm using a strategy of scheduling a small number of buffers, and using the completion handler to keep the process moving forward by scheduling one more buffer for each one that completes.I'm seeing two problems with this approach:One, the total memory consumed by my app grows steadily while the audio is playing, which suggests that the audio buffers are never being deallocated or some other runaway process is underway. (The Leaks tool doesn't detect any leaks, however).Two, audio playback sometimes stops, particularly on slower devices. By "stops", what I mean is that at some point I schedule a buffer and the completion block for that buffer is never called. When this happens, I can't even clear the problem by stopping the player.Now, regarding the first issue, I suspected that if my completion block recursively scheduled another buffer with another completion block, I would probably end up blowing out the stack with an infinite recursion. To get around this, instead of directly scheduling the buffer in the completion block, I set it up to enqueue the schedule in a dispatch queue. However, this doesn't seem to solve the problem.Any advice would be appreciated. Thanks.

Hi,When I run mediastreamvalidator on HLS streams (produced by mediafilesegmenter), with SAMPLE-AES applied, the latest version always signals :Unsupported audio track codec: Unknown - As a 'MUST FIX' issue.This result occurs even when I run the validator against the FairPlayStreaming example content supplied with the developer SDK package.This seems to have been introduced in HTTPLiveStreamingTools version:Version 1.2(170524)It does not happen with tools version:Version 1.2(160525)Is this a bug in the tool? or a new requirement perhaps?Hopefully someone can help me out with this...

Howdy,I'm hoping to start a conversation about getting access to live audio data for items playing from Apple Music.As background, we've been authoring and selling music visuals on OS X and other platforms for over 13 years. We are behind some of the visualizers that reside in iTunes to this day. Our latest product is an iOS app called Tunr, and it features a unique UI for audio/streaming services and protocols, unifying the user music experience in the way iTunes 1.0 set out to do -- most importantly, we seek to pull multiple music sources under a single roof and do it in the context of mobile and streaming. For easier reference, grab Tunr from the app store and play with it.As we rollout Tunr, we're getting requests to add support for Apple Music. MusicKit, like other ReST interfaces that we support (SoundCloud, Spotify, iHeartRadio, etc), fits into our model by design. However, because MusicKit requires playback through MPMusicPlayerController, there isn't a way to tap into the live audio/PCM samples (so that the user sees Tunr's realtime visuals react to the currently playing audio). In contrast, for example, the Spotify SDK has its own player API but exposes an AUGraph, allowing Tunr to call AudioUnitAddRenderNotify() where we can read the PCM data for visualization.In general, not offering access to raw PCM data traces back to DRM policies originating in the 2000s. I also submit that the way apps like Tunr use live audio data is disjoint from the DRM politics and debate. However, in practice, we all know it's hard to disentangle the two, and that’s likely why AVPlayer also never had a live audio tap. For this reason, we had to develop our own player for Tunr.As a proposed solution, I’d like to suggest that MPMediaPlayback be extended such that a callback gets downsampled audio PCM data to, say, 5k-11k samples/sec. This sample rate is too low for it to be "ripped" but would be sufficient for rendering visualizations.In any case, I at least wanted to stimulate conversation on this topic. Alternatively, it would be to get access to the audio stream to decode and play for a given Apple music item, but I'm pretty sure that's a non-starter.Suggestions? Thoughts? Other ideas?Andy O'MearaSoundSpectrum CTO

Hi all this is my first post on the Dev community.I'm just been approved by Apple News and I have my news channel. My problems is that I can't access on my iPad as I don't have a Mac.Can anyone tell me if is a known problem? or if there is any way to use it on iPad?I know with the plug-in you can write your article on CMS but I don't have any of them and I'm writing through iCloud.Is Apple making the New Publisher accessible to iPad too?M

I get a few seconds delay intermittently when playing or skipping a song (even ones downloaded). This functionality works perfectly in the native music app or the control centre widget. Even the "Adding Content To Apple Music" sample code app is very laggy. This bug needs to fixed because it makes users think the app is frozen, thus ruining the app user experience.Please submit your own bug reports to apple if you are having this problem so we can get this issue resolved faster!

I'm using a VoiceProcessingIO audio unit in my VoIP application on Mac. The problem is, at least since Mojave, AudioComponentInstanceNew blocks for at least 2 seconds. Profiling shows that internally it's waiting on some mutex and then on some message queue. My code to initialize the audio unit is as follows: OSStatus status; AudioComponentDescription desc; AudioComponent inputComponent; desc.componentType = kAudioUnitType_Output; desc.componentSubType = kAudioUnitSubType_VoiceProcessingIO; desc.componentFlags = 0; desc.componentFlagsMask = 0; desc.componentManufacturer = kAudioUnitManufacturer_Apple; inputComponent = AudioComponentFindNext(NULL, &desc); status = AudioComponentInstanceNew(inputComponent, &unit);Here's a profiler screenshot showing the two system calls in question.So, is this a bug or an intended behavior?

I tried to use smart playlist to get all liked songs. But Smart playlists are not returned from Library Playlists endpoint https://api.music.apple.com/v1/me/library/playlists — only the regular playlists are returned.Is there a way to fetch user's smart playlists?If not is there a way to fetch liked songs? Currently I have to load ALL songs and the ratings for all of them, then manually filter. It takes ridiculous amount of time, especially because page size is limited to 100. Btw, is there a way to increase it?

That is, will my render callback ever be called after AudioOutputUnitStop() returns?In other words will it be safe to free resources used by the render callback or do I need to add realtime safe communication between the stopping thread and the callback thread?This question is intended for both macOS HAL Output and iOS Remote IO output units.

I'm using AVAssetReaders with AVSampleBufferDisplayLayers to display multiple videos at once. I'm seeing this issue on iOS 13.1.3, 13.2b2, on various hardware like iPad 10.5 and iPad 12.9.It works well for a while, then a random call to copyNextSampleBuffer never returns, blocking that thread indefinitely and eating up resources.I have tried different threading approaches with no avail:If copyNextSampleBuffer() and reader.cancelReading() are done on the same queue, then copyNextSampleBuffer() gets stuck and the cancelReading() never gets processed because the queue is blocked. If I manually (with the debugger) jump in on that blocked queue and execute cancelReading(), immediately an EXC_BREAKPOINT crashes the appIf copyNextSampleBuffer() and reader.cancelReading() are done on different queues, then copyNextSampleBuffer() crashes with EXC_BAD_ACCESSHere's the stacktrace (same queue approach). I don't understand why it's stuck, my expectation is that copyNextSampleBuffer should always return (ie. with nil in error case).VideoPlayerView: UIView with AVSampleBufferDisplayLayerAVAssetFactory: Singleton with the queue that creates & manages all AVAssetReader / AVAsset* objects* thread #22, queue = 'AVAssetFactory' frame #0: 0x00000001852355f4 libsystem_kernel.dylib`mach_msg_trap + 8 frame #1: 0x0000000185234a60 libsystem_kernel.dylib`mach_msg + 72 frame #2: 0x00000001853dc068 CoreFoundation`__CFRunLoopServiceMachPort + 216 frame #3: 0x00000001853d7188 CoreFoundation`__CFRunLoopRun + 1444 frame #4: 0x00000001853d68bc CoreFoundation`CFRunLoopRunSpecific + 464 frame #5: 0x000000018f42b6ac AVFoundation`-[AVRunLoopCondition _waitInMode:untilDate:] + 400 frame #6: 0x000000018f38f1dc AVFoundation`-[AVAssetReaderOutput copyNextSampleBuffer] + 148 frame #7: 0x000000018f3900f0 AVFoundation`-[AVAssetReaderTrackOutput copyNextSampleBuffer] + 72 * frame #8: 0x0000000103309d98 Photobooth`closure #1 in AVAssetFactory.nextSampleBuffer(reader=0x00000002814016f0, retval=(Swift.Optional<CoreMedia.CMSampleBuffer>, Swift.Optional<AVFoundation.AVAssetReader.Status>) @ 0x000000016dbd1cb8) at AVAssetFactory.swift:108:34 frame #9: 0x0000000102f4f480 Photobooth`thunk for @callee_guaranteed () -> () at <compiler-generated>:0 frame #10: 0x0000000102f4f4a4 Photobooth`thunk for @escaping @callee_guaranteed () -> () at <compiler-generated>:0 frame #11: 0x000000010bfe6c04 libdispatch.dylib`_dispatch_client_callout + 16 frame #12: 0x000000010bff5888 libdispatch.dylib`_dispatch_lane_barrier_sync_invoke_and_complete + 124 frame #13: 0x0000000103309a5c Photobooth`AVAssetFactory.nextSampleBuffer(reader=0x00000002814016f0, self=0x0000000281984f60) at AVAssetFactory.swift:101:20 frame #14: 0x00000001032ab690 Photobooth`closure #1 in VideoPlayerView.setRequestMediaLoop(self=0x000000014b8da1d0, handledCompletion=false) at VideoPlayerView.swift:254:70 frame #15: 0x0000000102dce978 Photobooth`thunk for @escaping @callee_guaranteed () -> () at <compiler-generated>:0 frame #16: 0x000000018f416848 AVFoundation`-[AVMediaDataRequester _requestMediaDataIfReady] + 80 frame #17: 0x000000010bfe5828 libdispatch.dylib`_dispatch_call_block_and_release + 24 frame #18: 0x000000010bfe6c04 libdispatch.dylib`_dispatch_client_callout + 16 frame #19: 0x000000010bfedb74 libdispatch.dylib`_dispatch_lane_serial_drain + 744 frame #20: 0x000000010bfee744 libdispatch.dylib`_dispatch_lane_invoke + 500 frame #21: 0x000000010bff9ae4 libdispatch.dylib`_dispatch_workloop_worker_thread + 1324 frame #22: 0x000000018517bfa4 libsystem_pthread.dylib`_pthread_wqthread + 276I've tried all kinds of other things like making sure the AVAssets and all objects are made on one queue, and stopping the AVAssetReaders from ever deallocing to see if that helps. Nothing works. Any ideas?

When describing closed captions renditions through HLS master playlists, should a properly formed playlist with closed captions contain one closed caption rendition with the DEFAULT=YES attribute? I searched the HLS RFC and section 4.3.4.1 on EXT-X-MEDIA mentions that no more than one should contain the DEFAULT=YES attribute. I was hoping to find recommendations around whether with one or more EXT-X-MEDIA renditions in the same group, if it is required that one of them contain DEFAULT=YES.The media player I am using does not display closed captions if one of the closed captions renditions does not contain the DEFAULT=YES attribute and I am wondering if that is an issue with the player or an issue with a malformed HLS playlist. Note the lack of a DEFAULT=YES attribute in the example playlist below. Should this still be considered a valid playlist?#EXTM3U #EXT-X-VERSION:3 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-MEDIA:TYPE=CLOSED-CAPTIONS,GROUP-ID="CC",LANGUAGE="eng",NAME="English",INSTREAM-ID="CC1" #EXT-X-STREAM-INF:BANDWIDTH=2103200,AVERAGE-BANDWIDTH=2305600,CODECS="avc1.640029,mp4a.40.2",RESOLUTION=960x540,FRAME-RATE=30.000,CLOSED-CAPTIONS="CC" https://the.link.to.my.stream #EXT-X-STREAM-INF:BANDWIDTH=804760,AVERAGE-BANDWIDTH=875600,CODECS="avc1.640029,mp4a.40.2",RESOLUTION=640x360,FRAME-RATE=30.000,CLOSED-CAPTIONS="CC" https://the.link.to.my.stream #EXT-X-STREAM-INF:BANDWIDTH=1304160,AVERAGE-BANDWIDTH=1425600,CODECS="avc1.640029,mp4a.40.2",RESOLUTION=768x432,FRAME-RATE=30.000,CLOSED-CAPTIONS="CC" https://the.link.to.my.stream #EXT-X-STREAM-INF:BANDWIDTH=505120,AVERAGE-BANDWIDTH=545600,CODECS="avc1.640029,mp4a.40.2",RESOLUTION=480x270,FRAME-RATE=30.000,CLOSED-CAPTIONS="CC" https://the.link.to.my.stream #EXT-X-STREAM-INF:BANDWIDTH=3102000,AVERAGE-BANDWIDTH=3405600,CODECS="avc1.640029,mp4a.40.2",RESOLUTION=1280x720,FRAME-RATE=30.000,CLOSED-CAPTIONS="CC" https://the.link.to.my.stream

We have an iOS app in the App Store. Recently, we see in Organizer / Crashes for that app a new type of crash that seems bound to iOS 13 devices (21 devices affected in the last few weeks, all with iOS 13.1, .2, or .3). Xcode reports that the crashes occurred in QuartzCore, on CA::Render::Encoder::grow(unsigned long).Any idea what can it be and how it could be fixed? It doesn't look related to our code. Can it be a recent Apple bug? (We didn't have these crash reports before iOS 13.) Thank you in advance.Here is an extract from the crash log:OS Version: iPhone OS 13.3 (17C54) Release Type: User Baseband Version: n/a Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Triggered by Thread: 0 Thread 0 name: Thread 0 Crashed: 0 libsystem_kernel.dylib 0x0000000191d27ec4 __pthread_kill + 8 1 libsystem_pthread.dylib 0x0000000191c431d8 pthread_kill$VARIANT$mp + 136 (pthread.c:1458) 2 libsystem_c.dylib 0x0000000191b97844 abort + 100 (abort.c:110) 3 QuartzCore 0x00000001989af340 CA::Render::Encoder::grow(unsigned long) + 304 (render-coding.cpp:562) 4 QuartzCore 0x00000001989afa80 CA::Render::Encoder::encode_data_async(void const*, unsigned long, void (*)(void const*, void*), ... + 172 (render-coding.h:272) 5 QuartzCore 0x000000019886c358 CA::Render::Image::encode(CA::Render::Encoder*) const + 748 (render-image.cpp:401) 6 QuartzCore 0x000000019888510c CA::Render::Layer::encode(CA::Render::Encoder*) const + 112 (render-coding.h:388) 7 QuartzCore 0x00000001989b3c2c CA::Render::encode_set_object(CA::Render::Encoder*, unsigned long, unsigned int, CA::Render::Obje... + 192 (render-coding.cpp:2151) 8 QuartzCore 0x00000001988f78a4 invocation function for block in CA::Context::commit_transaction(CA::Transaction*, double) + 1568 (CAContextInternal.mm:1632) 9 QuartzCore 0x00000001989add88 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 364 (CALayer.mm:2647) 10 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 11 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 12 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 13 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 14 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 15 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 16 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 17 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 18 QuartzCore 0x00000001989add00 CA::Layer::commit_if_needed(CA::Transaction*, void (CA::Layer*, unsigned int, unsigned int) block... + 228 (CALayer.mm:2633) 19 QuartzCore 0x00000001988f6924 CA::Context::commit_transaction(CA::Transaction*, double) + 2872 (CAContextInternal.mm:2288) 20 QuartzCore 0x000000019891fc08 CA::Transaction::commit() + 676 (CATransactionInternal.mm:438) 21 UIKitCore 0x0000000195769698 -[_UIContextBinder updateBindableOrderWithTest:force:] + 704 (_UIContextBinder.m:280) 22 UIKitCore 0x0000000195769214 -[_UIContextBinder createContextsWithTest:creationAction:] + 100 (_UIContextBinder.m:233) 23 UIKitCore 0x00000001961d2510 -[UIWindowScene _prepareForResume] + 84 (UIWindowScene.m:712) 24 UIKitCore 0x00000001955e364c -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 860 (UIScene.m:1055) 25 UIKitCore 0x00000001955e45b8 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] + 220 (UIScene.m:1315) 26 UIKitCore 0x0000000195b57248 -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 464 (UIApplicationSceneClientAgent.m:80) 27 FrontBoardServices 0x0000000197051248 -[FBSSceneImpl updater:didUpdateSettings:withDiff:transitionContext:completion:] + 544 (FBSSceneImpl.m:551) 28 FrontBoardServices 0x0000000197075d28 __88-[FBSWorkspaceScenesClient sceneID:updateWithSettingsDiff:transitionContext:completion:]_bloc... + 120 (FBSWorkspaceScenesClient.m:356) 29 FrontBoardServices 0x000000019705af04 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 232 (FBSWorkspace.m:357) 30 FrontBoardServices 0x0000000197075c5c __88-[FBSWorkspaceScenesClient sceneID:updateWithSettingsDiff:transitionContext:completion:]_bloc... + 184 (FBSWorkspaceScenesClient.m:355) 31 libdispatch.dylib 0x0000000191bfd184 _dispatch_client_callout + 16 (object.m:495) 32 libdispatch.dylib 0x0000000191ba5fd8 _dispatch_block_invoke_direct$VARIANT$mp + 224 (queue.c:466) 33 FrontBoardServices 0x000000019709a418 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 40 (FBSSerialQueue.m:173) 34 FrontBoardServices 0x000000019709a0e4 -[FBSSerialQueue _queue_performNextIfPossible] + 404 (FBSSerialQueue.m:216) 35 FrontBoardServices 0x000000019709a60c -[FBSSerialQueue _performNextFromRunLoopSource] + 28 (FBSSerialQueue.m:247) 36 CoreFoundation 0x0000000191eaea00 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 (CFRunLoop.c:1922) 37 CoreFoundation 0x0000000191eae958 __CFRunLoopDoSource0 + 80 (CFRunLoop.c:1956) 38 CoreFoundation 0x0000000191eae0f0 __CFRunLoopDoSources0 + 180 (CFRunLoop.c:1992) 39 CoreFoundation 0x0000000191ea923c __CFRunLoopRun + 1080 (CFRunLoop.c:2882) 40 CoreFoundation 0x0000000191ea8adc CFRunLoopRunSpecific + 464 (CFRunLoop.c:3192) 41 GraphicsServices 0x000000019be2e328 GSEventRunModal + 104 (GSEvent.c:2246) 42 UIKitCore 0x0000000195fa3ae0 UIApplicationMain + 1936 (UIApplication.m:4773) 43 <Our app name> 0x0000000100d9d32c main + 88 (main.m:14) 44 libdyld.dylib 0x0000000191d32360 start + 4

Hello Guys,Recently, I'm getting this kind of issue on the HLS live streaming content,The error detail is like belowerror -16832/CoreMediaErrorDomain Warning: restarting 12.494080s from end of live playlist; target duration 9s - stall danger for https://C4--147-21-8-0-24-8395.dfwlive-v1-c4p1-sponsored.dfw.vcdn.att-idns.net/Content/HLS.abre/Live/channel(CMTHD-8395.dfw.1080)/uc9zjusg758wyw3zmumhqyck92mpguti-ks7qcjbcm2aaaaaa-20191125T201851-197474271-114.vttAnyone know what this is? It seems make the picture frozen, or degrade the streaming quality. Sometimes end up restarting the playback.Thanks & regards.

by defect auv3 extensions use objective-c for the dsp part can i use swift instead?

I notice that precious few HTTP Live Streaming questions have gotten responses, let alone answers. But I'll be optimistic!I'd like to try streaming my own live video through the LL-HLS tools (currently prerelease 73), in multiple bitrates.I succeeded in following directions: I use tsrecompressor to generate "bip-bop" video and pass three compressed variations of that into three instances of mediastreamsegmenter, then out through three instances of ll-hls-origin-example.go. It works as promised, end-to-end. (Brief aside, for any who may stumble after me: it took me too long to realize that I should improve my knowledge of IP Multicasting and use the prescribed 224.0.0.50 address. I got nowhere trying to simply route familiar UDP unicast between my processes.)So far, so good. Now I want to supply my own video from an external feed. Not the generated "bip-bop" or any local capture devices.% tsrecompressor --help tsrecompressor: unrecognized option `--help' Read input MPEG-2 TS, recompress and write to output. Usage: tsrecompressor [options] where options are: -i | --input-file= : input file path (default is stdin) ... etc.That sounds fantastic — I'd love to feed tsrecompressor through stdin! But in what format? It doesn't say, and my first few dozen guesses came up cold.The man page for mediastreamsegmenter appears to point the way: The mediastreamsegmenter only accepts MPEG-2 Transport Streams as defined in ISO/IEC 14496-1 as input. The transport stream must contain H.264 (MPEG-4, part 10) video and AAC or MPEG audio. If AAC audio is used, it must have ADTS headers. H.264 video access units must use Access Unit Delimiter NALs, and must be in unique PES packets.Of course, that's mediastreamsegmenter and not tsrecompressor. But it's a start. So this is my best guess at the appropriate ffmpeg output. (Recall that I want to eventually pass a live stream into ffmpeg; for now I'm starting with an m4v file.)% ffmpeg -re -i infile.m4v \ -c:v h264_************ \ -c:a aac_at \ -f mpegts \ - | tsrecompressor -h -a \ -O 224.0.0.50:9121 \ -L 224.0.0.50:9123 \ -P 224.0.0.50:9125This ends abruptly after 9 frames.av_interleaved_write_frame(): Broken pipe Error writing trailer of pipe:: Broken pipe//My best results are when I change from H.264 to H.265:% ffmpeg -re -i infile.m4v \ -c:v hevc_************ \ -c:a aac_at \ -f mpegts \ - | tsrecompressor -h -a \ -O 224.0.0.50:9121 \ -L 224.0.0.50:9123 \ -P 224.0.0.50:9125Now it doesn't break the pipe. It keeps counting along, frame after frame. The VTEncoderXPCService starts up, and sampling of the tsrecompressor process shows both producer and consumer threads for audio recompression.But there's no output. There was output for the generated "bip-bop" video. Not for HEVC-TS via stdin. I'm not 100% certain yet but I see no indication of any UDP output from tsrecompressor. The three mediastreamsegmenter processes sit idle.Am I missing some tag, or something, in the input stream? Do I need to pay more attention to chunk sizes and frame offsets?Thanks, all, for any insight or experience.

I'm trying to make an app that plays audio when push is received, even while the ringer is silent.I have the audio background mode enabled and the app works (usually) fine, but sometimes i get a mysterious 561015905 error.The error isAVAudioSession.ErrorCode.cannotStartPlayingAnd docs indicate:This error type can occur if the app’s Information property list doesn’t permit audio use. It can also occur if the app is in the background and using a category that doesn’t allow background audio.https://developer.apple.com/documentation/avfoundation/avaudiosession/errorcode/cannotstartplayingHowever, the audio mode is definitely enabled and the category is always playback that should allow background playing.(this works 95-99% of times)So, with intesnse testing i have found that once every 20-100 incoming pushes i get this error:Error: Error Domain=NSOSStatusErrorDomain Code=561015905 "(null)"Why?