[Live-devel] AAC streaming

[Ross Finlayson]

>Can you explain more in detail what parameters clients need to know in
>order to decode the RTP stream which contains ADTS audio data.

I don't have time to do this, but if you really care, you can read 
RFC 3640.  However, one important such parameter is sampling 
frequency.

>  It means
>that RTP protocol fully supports MP3 but not AAC?

No, it doesn't mean that at all.  All it means is that AAC RTP 
packets - unlike MP3 RTP packets - are not completely 'self 
describing'.  I.e., a receiver cannot decode the incoming stream just 
by looking at the contents of the packet.  Instead, it will need 
additional parameters that are included in the SDP description, which 
clients retrieve using the RTSP protocol.

Many other codecs are like this - e.g., PCM audio, MPEG-4 video and 
H.264 video.
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/