iphoneiosipadcore-audio

What does kExtAudioFileError_AsyncWriteTooLarge(-66569) returned by ExtAudioFileWriteAsync mean?

I can't find any info about OSStatus = -66569 returned by ExtAudioFileWriteAsync, except its enum tag: kExtAudioFileError_AsyncWriteTooLarge.

Right now I'm asking not why I get this error, but what does it really mean? Because I get this status, even if I try to pass any packets quantity more than zero...

For example: ExtAudioFileWriteAsync(MyExtAudioFileRef, 1, &MyAudioBufferList);

Thanks a lot in advance! =)

Solution

  • For me kExtAudioFileError_AsyncWriteTooLarge means that you forgot to set the audio client format (kExtAudioFileProperty_ClientDataFormat) before calling the traditional setup call to ExtAudioFileWriteAsync(file, 0, NULL); and then you wrote some real data.

    I guess under the hood there's a default client format, which when different to the one implied by the AudioBufferLists you write, could somehow be smaller, giving you this error.

    Hope this answer found you in time!