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AVAssetWriter not working with videoChat mode of AVAudioSession (iPhone 14 Pro only)
I have a video conferencing app and we are setting up AVAudioSession to videoChat so that we can get echo cancellation. let options: AVAudioSession.CategoryOptions = [.mixWithOthers , .defaultToSpeaker, .allowBluetooth] try session.setCategory(.playAndRecord, mode: .videoChat, options: options) I also want to do local recording of audio samples using AVAssetWriter API. Setup of AssertWriter is as follows: let audioAssetWriter = try AVAssetWriter(outputURL: fileURL, fileType: .m4a) let settings: [String: Any] = [ AVFormatIDKey: Int(kAudioFormatMPEG4AAC), AVSampleRateKey: Int(audioParameters.samplingRate), AVEncoderBitRateKey: Int(audioParameters.bitrate), AVNumberOfChannelsKey: Int(audioParameters.channels), AVEncoderAudioQualityKey: AVAudioQuality.max.rawValue ] let assetWriterAudioInput = AVAssetWriterInput(mediaType: .audio, outputSettings: settings) assetWriterAudioInput.expectsMediaDataInRealTime = true audioAssetWriter.add(assetWriterAudioInput) I am seeing that on the iPhone 14 Pro, assetWriterAudioInput.append() is failing. Everything works fine on iPhone 13 and older devices. Is anyone else seeing this issue on the iPhone 14 Pro.
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748
Dec ’22
CIContext::heifRepresentation randomly crashing in iOS 16
The following call to heifRepresentation is causing occasional crashes in iOS 16. context.heifRepresentation(of: image, format: CIFormat.RGBA8, colorSpace: perceptualColorSpace!, options: [kCGImageDestinationLossyCompressionQuality as CIImageRepresentationOption : 0.6] ) When we switch to context.jpegRepresentation: return context.jpegRepresentation(of: image, colorSpace: perceptualColorSpace!, options: [kCGImageDestinationLossyCompressionQuality as CIImageRepresentationOption : compressionFactor]) The app runs fine. Also, the context.heifRepresentation runs fine on iOS 15. Can someone please help?
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726
Oct ’22
Using Voice Isolation with back camera placed at 4ft distance
Voice isolation does a great job with noise suppression when the user is holding the phone in hand (facetime use case). But when the phone is about 4-feet away from the user, voice isolation quality substantially drops and we are seeing that it is better to not use it. Our use case demands that user mounts phone on tripod and sites approximately 4 feet away from camera. In this case we are seeing worst performance from voice isolation, presumably because of heavy signal processing and lower original signal to begin with.
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746
Jun ’22
Continuity Camera - Streaming Use Case
Continuity Camera is a way to stream raw video and metadata from iPhone to mac. Is it possible for an iPhone local recording app to use camera continuity to stream a preview from iPhone to mac? Can camera continuity be made available on iPad, so that one can stream video/metadata to iPad screen (use case being a need to use better camera and user does not have a mac-book)
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1.4k
Jun ’22