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Is HE-AAC (v1 and v2) _encoding_ possible on iOS? Judging from this link https://developer.apple.com/library/content/documentation/AudioVideo/Conceptual/MultimediaPG/UsingAudio/UsingAudio.html where HE-AAC is mentioned only in the decoding table it would seem that encoding isn't supported. OTOH, judging from the comment at this link https://developer.apple.com/reference/audiotoolbox/1559928-audio_converter_properties/kaudioconverterpropertyformatlist?language=objc even v2 should be supported... Finally, modifying the ExtendedAudioFileConvertTest example/demo source code to produce HE-AAC v1 files _works_ but _does not work_ if I try v2 (with "Couldn't set the client format on the destination file!")... |
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