How to find an audio file's length (in seconds)

Posted by mIL3S on Stack Overflow See other posts from Stack Overflow or by mIL3S
Published on 2011-01-07T20:51:37Z Indexed on 2011/01/07 20:53 UTC
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Filed under:

iphone

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objective-c

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audio

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core-audio

Hi all!

(Objective C) Just using simple AudioServicesPlaySystemSoundID and its counterparts, but I can't find in the documentation if there is already a way to find the length of an audio file.

I know there is AudioServicesGetPropertyInfo, but that seems to return a byte-buffer - do audio files embed their length in themselves and I can just extract it with this?

Or is there perhaps a formula based on bit-rate * fileSize to convert to length-of-time?

mIL3S

www.milkdrinkingcow.com

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