Re: how to estimate file size when writing audio files on IOS?
Re: how to estimate file size when writing audio files on IOS?
- Subject: Re: how to estimate file size when writing audio files on IOS?
- From: "T.J. Usiyan" <email@hidden>
- Date: Thu, 20 Dec 2012 09:58:31 -0500
Backline calc is a good example of figuring this out.
On Sun, Dec 16, 2012 at 1:35 PM, Andy Davidson <
email@hidden> wrote:
> Hi
>
> I have an IOS app built using core audio and audio units. I am thinking
> about add the ability to create audio files. I want to make sure these audio
> files can be played on as many different systems as possible.
>
> Does CoreAudio provided a "write" codex anything other than
> kAudioFileWAVEType and kAudioFileM4AType ?
>
> I realize I could probably cut the HZ in 1/2 to reduce audio file size if I
> was willing to accept lower quality.
>
> How can I estimate how big the output audio file will be in advance?
>
> Can I add arbitrary key/value data to the header of a m4a? I looked through
> AudioToolbox/ExtendedAudioFile.h but did not find much.
>
> Thanks in advance
>
> Andy
>
>
>
>
>
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