[M4IF Technotes] Number of Channels

[Dave Singer]

At 11:22 +0100 12/5/02, AVARO Olivier FTRD/DIH/REN wrote:
>  > You can get it from Decoder_specific_info presented in
>>  ES_Descriptor
>>  of partricular audio track.
>I don't think this is mandatorily present in 3GPP branded files.
>Maybe another good reason to multi-brand your files and have MP4
>branding as the common denominator so that we avoid YAMM (yet another
>multimedia mess).

Ah, the only codecs that 3G uses are (a) AMR-NB and -WB, which I 
believe are definitively mono and (b) AAC, for which you get the DSI. 
So I think we're still safely in UMM (usual multimedia mess)!
-- 
David Singer
Apple Computer/QuickTime