AAC is not an Apple-specific format -- it's part of the MPEG-4 spec.
There are open source decoders available (FAAD is one example). Why
would licensing issues prevent MPEG-4 support but allow MPEG-1 support
(MP3 is part of the MPEG-1 spec)?

On Nov 13, 11:50 am, "Tristam MacDonald" <[EMAIL PROTECTED]> wrote:
> On Thu, Nov 13, 2008 at 12:18 PM, Andre Maximo <[EMAIL PROTECTED]> wrote:
>
> > Hi,
>
> >  I'm trying to write a media player with PyGLET and it can play mp3
> > files fine. The problem is when I tryed to play a .m4a file, also
> > called AAC file, which generally comes imported from audio CD musics.
> > How can I play it?
>
> AAC files are an Apple-specific format, and tend to be generated by iTunes
> when it imports CDs. You can change iTunes' preferences to import as MP3
> instead, and the same setting enables you to convert existing AAC tracks to
> MP3 (try the 'Advanced' menu -> 'Create MP3 Version'). Quicktime Player Pro
> can also be used to perform the conversion.
>
> As for playing them directly in Pyglet, I am afraid that AVBin doesn't
> support an AAC codec - nor is it likely too in the immediate future, due to
> licensing issues.
>
> - Tristam
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