[Live-devel] AAC streaming

[Tran Minh Son]

Dear Ross Finlayson
Thank you very much for your explaination. Up to now I thought that RTSP 
at most adds the control layer (DESC, SETUP,PLAY,PAUSE..) to the 
underlying media layer  (RTP) to enable the interactivity between 
server-client, and the RTP stream itself can be treated (decoded) by 
client without  any additional  information. 
Can you explain more in detail what parameters clients need to know in 
order to decode the RTP stream which contains ADTS audio data. It means 
that RTP protocol fully supports MP3 but not AAC? I means  using  single 
RTP we can stream out for instance MP3, but for AAC we have to couple 
RTP with some additional protocol like RTSP?. I am terribly sorry if my 
questions are maybe so naive. This is the first time I have to look 
deeper inside in the streaming protocol
Thank you again for your help and time
Best regards
Son
   
Ross Finlayson a écrit :
>> I know that with Media Server I can stream out the AAC content but in
>> the RTSP manner. Upon the request from client, the media (of type AAC)
>> will be streamed out in the encapsulation of RTP/RTCP.  I would like to
>> have something more simpler: the second action only. That is without any
>> control level from RTSP
>>     
>
> No, if you want to stream an AAC audio (ADTS format) file, then you 
> will need to use RTSP, because the stream will have some 
> (file-specific) parameters that can only be communicated in the SDP 
> description (which is delivered to the client using RTSP).
>
> If you wish, you can write an application that streams via multicast 
> (rather than unicast), but you will still need to have a built-in 
> RTSP server, and have the clients play the stream using RTSP.
>
> In either case, you will be able to play the stream using either VLC 
> or QuickTime Player - using a "rtsp://" URL.
>