IOS 18 below FFmpeg subtitle synthesis log [Parsed_subtitles_0 @ 0x301b37650] Using font provider fontconfig [Parsed_subtitles_0 @ 0x301b37650] fontselect: (PingFangSC-Semibold, 400, 0) -> /System/Library/Fonts/LanguageSupport/PingFang.ttc, 8, PingFangSC-Semibold IOS 18 FFmpeg subtitle synthesis log [Parsed_subtitles_0 @ 0x303e825d0] Using font provider fontconfig [Parsed_subtitles_0 @ 0x303e825d0] fontselect: (PingFangSC-Regular, 400, 0) -> /System/Library/Fonts/Core/HiraginoKakuGothic.ttc, 10, . HiraKakuInterface-W4 [Parsed_subtitles_0 @ 0x303e825d0] Glyph 0x8FD9 not found, selecting one more font for (PingFangSC-Regular, 400, 0) [Parsed_subtitles_0 @ 0x303e825d0] fontselect: (PingFangSC-Regular, 400, 0) -> /System/Library/Fonts/Core/LastResort.otf, 0, LastResort In normal characters, there may be some garbled characters, such as 0x8FD9 mentioned in the log, corresponding to "这" Traditional Chinese and Simplified Chinese Normal font: Russian, Korean, Japanese, French, English, German IOS 18 below FFmpeg subtitle synthesis log fontselect: (PingFangSC-Semibold, 400, 0) -> /System/Library/Fonts/LanguageSupport/PingFang.ttc, 8, PingFangSC-Semibold IOS 18 FFmpeg subtitle synthesis log fontselect: (PingFangSC-Regular, 400, 0) -> /System/Library/Fonts/Core/HiraginoKakuGothic.ttc, 10, . HiraKakuInterface-W4 In iOS 18, the selected font has changed and instead of continuing to use PingFang.ttc, HiraginoKakuGothic. Has iOS changed the PingFang font directory, causing ffmpeg to be unable to use system fonts for subtitle synthesis

We have developed a custom player tvOS application using AVPlayer Foundation. When we hit the Siri command "What did they say?" Playback will go backwards but subtitles will not work temporarily. Anyone please suggest a solution for this issue :)

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？

I want my app to allow the user to search for certain words in a video file and the transcript of that video. I found a Transcript class. I don't remember which Framework it is in. Would someone point me in the right direction? What Framework and Classes should I use.

Hello I am testing the new Media Extension API in macOS 15 Beta 4. Firstly, THANK YOU FOR THIS API!!!!!! This is going to be huge for the video ecosystem on the platform. Seriously! My understanding is that to support custom container formats you make a MEFormatReader extension, and to support a specific custom codec, you create a MEVideoDecoder for that codec. Ok - I have followed the docs - esp the inline header info and have gotten quite far A Host App which hosts my Media Extenion (MKV files) A Extension Bundle which exposes the UTTYpes it supports to the system and plugin class ID as per the docs Entitlements as per docs I'm building debug - but I have a valid Developer ID / Account associated in Teams in Xcode My Plugin is visible to the Media Extension System preference My Plugin is properly initialized, I get the MEByteReader and can read container level metadata in callbacks I can instantiate my tracks readers, and validate the tracks level information and provide the callbacks I can instantiate my sample cursors, and respond to seek requests for samples for the track in question Now, here is where I get hit some issues. My format reader is leveraging FFMPEGs libavformat library, and I am testing with MKV files which host AVC1 h264 samples, which should be decodable as I understand it out of the box from VideoToolbox (ie, I do not need a separate MEVideoDecoder plugin to handle this format). Here is my CMFormatDescription which I vend from my MKV parser to AVFoundation via the track reader Made Format Description: <CMVideoFormatDescription 0x11f005680 [0x1f7d62220]> { mediaType:'vide' mediaSubType:'avc1' mediaSpecific: { codecType: 'avc1' dimensions: 1920 x 1080 } extensions: {(null)} } My MESampleCursor implementation implements all of the callbacks - and some of the 'optional' sample cursor location methods: (im only sharing the optional ones here) - (MESampleLocation * _Nullable) sampleLocationReturningError:(NSError *__autoreleasing _Nullable * _Nullable) error - (MESampleCursorChunk * _Nullable) chunkDetailsReturningError:(NSError *__autoreleasing _Nullable * _Nullable) error I also populate the AVSampleCursorSyncInfo and AVSampleCursorDependencyInfo structs per each AVPacket* I decode from libavformat Now my issue: I get these log files in my host app: <<<< VRP >>>> figVideoRenderPipelineSetProperty signalled err=-12852 (kFigRenderPipelineError_InvalidParameter) (sample attachment collector not enabled) at FigStandardVideoRenderPipeline.c:2231 <<<< VideoMentor >>>> videoMentorDependencyStateCopyCursorForDecodeWalk signalled err=-12836 (kVideoMentorUnexpectedSituationErr) (Node not found for target cursor -- it should have been created during videoMentorDependencyStateAddSamplesToGraph) at VideoMentor.c:4982 <<<< VideoMentor >>>> videoMentorThreadCreateSampleBuffer signalled err=-12841 (err) (FigSampleGeneratorCreateSampleBufferAtCursor failed) at VideoMentor.c:3960 <<<< VideoMentor >>>> videoMentorThreadCreateSampleBuffer signalled err=-12841 (err) (FigSampleGeneratorCreateSampleBufferAtCursor failed) at VideoMentor.c:3960 Which I presume is telling me I am not providing the GOP or dependency metadata correctly to the plugin. I've included console logs from my extension and host app: LibAVExtension system logs And my SampleCursor implementation is here https://github.com/vade/FFMPEGMediaExtension/blob/main/LibAVExtension/LibAVSampleCursor.m Any guidance is very helpful. Thank you!

When I use ReplayKit's exportClipToURL function on iOS to capture a 15-second replay, the resulting video quality is poor, with snowy artifacts on the damaged visuals and audio distortion.

Is it possible to put an video on loop and autoplaying for visionOS? We used AVPlayerViewController

Hi, I'm developing a simple app to visualize embedded VR180 3D video. I used a semisphere and projected the video as its material. The semisphere is in the ambient at a fixed y value of 1.35, which is good for a seated person, but not ideal for a standing person because the stereoscopic vision is not correct. In the AppleTV+ and Kandao applications, I noticed that the translation of the video is anchored to the Apple Vision Pro. I tried using AnchorEntity to the head with trackingMode .once, but there is the problem of rotation; the semisphere starts with the rotation of the head. Is there a solution, for example, to anchor the semisphere only to the translation and not to the rotation of the head?

Hi! I am getting AVErrorMediaServicesWereReset (-11819) thrown as an error by AVMutableCompositionTrack.insertTimeRange(_:of:at:) when trying to insert part of an AVAssetTrack into my video track (an AVMutableCompositionTrack) in my AVMutableComposition. This is not happening every time I'm making an AVMutableComposition, but it is happening frequently. I am also getting this error thrown when trying to export using an AVAssetExportSession. Is there any insight into what can cause this error in these scenarios? Thanks!

I'm trying to download M3U8 media on watchOS by this code: let configuration = URLSessionConfiguration.background(withIdentifier: "com.id") let session = AVAssetDownloadURLSession( configuration: configuration, assetDownloadDelegate: M3U8DownloadDelegate.shared, delegateQueue: .main ) let asset = AVURLAsset(url: URL(string: mediaLink)!) let downloadTask = session.makeAssetDownloadTask(downloadConfiguration: .init(asset: asset, title: "")) downloadTask.resume() m3u8DownloadObservation = downloadTask.progress.observe(\.fractionCompleted) { progress, _ in print(progress) } But downloadTask.progress is always zero, and the observation is never called. How to get the progress correctly?

When I try to run mediafilesegmenter with the following mediafilesegmenter -iso-fragmented -z frame_index.m3u8 \ -f 720p -i index_720p \ -k key.bin -stream_encrypt -P -K <url> \ -B seg_720p -t 6 source.mp4 I get the following output ISO fragmented mode, forcing segments to start with I-Frame Processing file source.mp4 track 2 of source.mp4 contains more than one valid time mapping Unable to find any valid tracks to segment. Segmenting failed (-15650). What specifically should I be looking for in my MP4 that would be causing this?

When I use the exportPresetsCompatibleWithAsset interface in iOS 17, everything works fine. However, when I upgraded my iPhone XR to iOS 18, calling the exportPresetsCompatibleWithAsset interface to transcode 4K assets returned success, but when I tried to save to the album, it returned error 3302. Is it because this interface has already been deprecated in iOS 16?

I am using Metal for rendering, and when calling the newCommandQueue interface of Metal, there is a certain probability that I will get a nil return value. However, when I call the MTLCreateSystemDefaultDevice interface, I can get a non-empty return value, which means my device supports Metal. I would like to ask what causes the newCommandQueue to return nil? Is there any way to avoid this situation? Thank you.

What framework to use to capture screen of a device connected to the Mac in the way OBS or QuickTime Player does when an iOS device is connected to Mac via USB. I tried to list devices with AVFoundation and ScreenCaptureKit but only Mac camera, mic and displays are listed. When you select New Movie Recording in the QuickTime Player you can choose an Connected iPad or iPhone to record it's screan. Same with OBS. What is the way to do it in my own MacOS app?

I recently bought an insta360 flow gimbal. when recording video with the instaflow app, I cannot see the location in apple photos app and all other apple apps. However I can see the location in windows photos app once I downloaded the videos into my windows PC. The location is also visible in android app once I share it through google account. With an exif app, I can see the location meta data in exif table as well, but again not shown as location. exiftool in my pc can also see the meta data including location as in attached screenshot. Compared to video shot with built-in camera app, I cannot find any difference in terms of location meta data. What could be wrong? I contacted insta360 app support, they do not seem to understand what's going on, just asking for very simple questions again and again like do you enable GPS location access, are you shooting video? I also contacted apple support, they are just saying it's thirdparty issue and refusing to help further. If it's really thirdparty issue how come the location data is actually embeded as meta data, and windows pc and android device can see the location? BTW, I air drop this video to all my apple devices like iPhone 15 ultra and ipad air, and very old iPhone, all of them cannot see the location.

I have an mp4 file (which is around 25min) which i need to play but if i open it in quick time player or AVplayer, it shows as around 55min in those two platfroms. I don't understand why this happens. It correctly shows the time when opening with a browser or VSCode built in video playback. Here is the link to the file: https://www.dropbox.com/scl/fi/hbg59uqx8xdpiqbnx5wz8/videoplayback-1.mp4?rlkey=7o8l8m7j8dhq0o6f3zssgv9bd&st=5lt6apug&dl=0

My app need a specific scene that play a video when my iPhone close to NFC Tags. and my app can read the data from NFC Tags, the data will tell us which kind of video can be play. I tried to write URLScheme or Universal Link in NFC Tags, but all this ways will pop up notifications. not launch my app and play a video, how can I design my app. please give me some advice, thanks!

I'm working on streaming tvOS app and as you know there are mostly two type of video streams - live and vod. AVPlayerViewController handles these types of streams by showing respective playback controls. Recently I got a task to implement synchronous vod playback(syncVod), it's when we need to simulate live playback while actual vod stream playback. In order to simulate live playback below things needs to be handled: Disabling scrubbing via remote. (Done. playerVc.requiresLinearPlayback = true) Disabling info panel view w/play "From beginning" button. (Done, playerVc.playbackControlsIncludeInfoViews = false) Disabling play/pause button.(Done, not ideally though. On rate change observer - if player.rate == 0 && playbackMode == .syncVod { player.play() return }). Why not ideal solution - tapping on remote causes quite short hiccup in playback - but playback resumes, no actual pause happens. Hiding progress bar and time labels. :( Point #4 is the main problem, we can't hide progress bar and it's related UI elements(time labels) particularly, but only hide all playback controls - playerVc.showsPlaybackControls = false. The thing is I have custom buttons in transportBarCustomMenuItems and hiding all playback controls is not the right option for me. Implementing custom playback controls panel is kind of heavy lift, but as of now it seems the only proper way of implementing syncVod playback ideally. Did anyone face similar issue and could resolve it w/out implementing custom playback controls panel ? Is there way to hide progress bar only in tvOS AVPlayerViewController?

HELP! How could I play a spatial video in my own vision pro app like the official app Photos? I've used API of AVKit to play a spatial video in XCode vision pro simulator with the guild of the official developer document, this video could be played but it seems different with what is played through app Photos. In Photos the edge of the video seems fuzzy but in my own app it has a clear edge. How could I play the spatial video in my own app with the effect like what is in Photos?

A small number of crashes are being reported on Firebase. When attempting to use the insertTimeRange:ofAsset:atTime:error: method of AVMutableComposition, a crash occurred with the error message -[__NSArrayM insertObject:atIndex:]: object cannot be nil. Most of them appear in versions of ios 17.0 and above. Here's my code： - (AVMutableComposition *)createtrimAsset:(AVAsset *)asset andStartTime:(CGFloat)startTime endTime:(CGFloat)endTime{ NSError *error = nil; CGFloat timescale = 1000000; AVMutableComposition *mutableComposition = [AVMutableComposition composition]; CMTime sStartTime = CMTimeMakeWithSeconds(CMTimeGetSeconds(asset.duration)*startTime, timescale); CMTime eEndTime = CMTimeMakeWithSeconds(CMTimeGetSeconds(asset.duration)*endTime, timescale); [mutableComposition insertTimeRange:CMTimeRangeMake(sStartTime, CMTimeSubtract(eEndTime, sStartTime)) ofAsset:asset atTime:kCMTimeZero error:&error]; return mutableComposition; } I attempted to reproduce this crash by deliberately setting the timeRange or asset to unusual values, such as asset=nil, or asset.duration=0, or asset.duration=NAN, but all attempts failed. What could be causing this exception? Any advice would be of great help to me.