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iphone - Reading audio samples via AVAssetReader - …
https://stackoverflow.com/questions/4972677/reading-audio-samples-via-avassetreader
How do you read audio samples via AVAssetReader? I've found examples of duplicating or mixing using AVAssetReader, but those loops are always controlled by the AVAssetWriter loop. Is it possible just to create an AVAssetReader and read through it, getting each sample and throwing the int32 of each audio sample into an array? Thanks.
Apple Developer Documentation
https://developer.apple.com/documentation/avfoundation/avassetreaderoutput
An object that reads audio samples that result from mixing audio from one or more tracks. class AVAsset Reader Video Composition Output. An object that reads composited video frames from one or more tracks of an asset. class AVAsset Reader Sample Reference Output.
Apple Developer Documentation
https://developer.apple.com/documentation/avfoundation/avassetreader
Overview. Use an asset reader to read media data from instances of AVAsset. The assets you read may represent file-based media like QuickTime movies or MPEG-4 files, or media that you compose from multiple sources using AVComposition.
iOS Stream Audio from one iOS Device to Another
https://www.py4u.net/discuss/1339664
The two main lower level APIs in iOS are Audio Unit and Audio Queue. By lower level, I mean an API that is a bit more nitty gritty than saying "just play back this mp3" or whatever. My experience has been that Audio Unit is lower latency, but that Audio Queue is more suited to streaming audio. So, I think for you the latter is a better option.
Playing audio · Issue #458 · BradLarson/GPUImage · GitHub
https://github.com/BradLarson/GPUImage/issues/458
The second problem I see is the synchronization between reader (the callback required by remoteIO audio unit) ad the writer of the audio samples. I'm working assuming that this is the problem building a buffer queue. Some help from someone with some experience with playing the audio from an AVAssetReader could be very useful.
iPodライブラリアセットをAudioQueue Serviceに接続し、Audio …
https://stackfinder.jp.net/questions/6268317/how-would-you-connect-an-ipod-library-asset-to-an-audio-queue-service-and-proces
Audio Unitでオーディオを処理するには、ステレオ形式である必要があるため、左右のチャンネルの値があります。 しかし、AVAssetReaderを使用してiPodライブラリからアセットを読み取ると、ステレオ形式でアセットを取得できません。
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