[Mp4-tech] another audio codec inside MP4 File

[Dave Singer]

At 12:45 AM -0800 2/1/05, Ravi wrote:
>Hi ALL,
>    Thanks for ur initial reply.
>
>   I can use the ObjectTypeIndication for the corresponding audio format
>   as specified but the ObjectTypeIndication is related to mpeg only.
>   What if i want to use AC-3 audio inside the MP4 File format.
>
>   I am not finding any details how i can specify the
>   DecoderConfigDescriptor in ES_Descriptor for such audio format (AC-3)
>   inside the esds atom in mp4 file format.
>
>   Please guide me to embedd AC-3 inside MP4 File Format.

I am not aware of any such definition.  You might want to work with 
Dolby on getting one published.  I suspect it is not hard.
An alternative to the OTI is to define a new SampleEntry 
four-character code.  See www.mp4ra.org for examples.
>
>   Regards,
>   Ravindra Dolas
>   
>
>
>
>
>
>
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-- 
David Singer
Apple Computer/QuickTime