[Matroska-devel] Re: AAC and SBR

Zen aaa at aaaa.com
Wed Apr 26 09:52:56 CEST 2006

Alexander Noe' a écrit :
> HE-AAC has 5 bytes of private data in WAVEFORMATEX when muxed into AVI 
> (and I guess also 5 bytes of private data in MP4). Thus, when using such 
> a source, you can tell whether or not its SBR from looking at the 
> private data size.

If I understand well, private data for AVI (and MP4) of a HE-AAC are 
different from other AAC (for me, the ADTS header is 8 byte long)
Now I have to handle this in my software ;-)

But my major problem is for raw AAC (ADTS header), and for them I have 
not the size...

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