[Live-devel] Couple of questions

[Chris Wein]

Note that ADTS is not quite an elementary AAC stream so if you demux the AAC you might just get a stream of raw data blocks with no headers at all which cannot be decoded unless the decoder knows the sampling frequency and channel config.Date: Wed, 8 Aug 2007 15:52:05 -0700To: live-devel at ns.live555.comFrom: finlayson at live555.comSubject: Re: [Live-devel] Couple of questions


Re: [Live-devel] Couple of
questions
 a) So I was looking for
something which demultiplexes this TS into audio and video
streams.
Currently when I look at the code, we do
have modules to demultiplex program streams, multiplex into transport
stream and also modules to convert from program stream to
transport stream.
But what I would really need is to
either have a demultiplexer for the transport stream, or rather
converter from transport to program stream. DO we have either support
which I might have missed out?

No, our library currently has no support for *demultiplexing*
Transport Streams.  Sorry.


 
b) Another observation I made is
that even if I got the above support to demultiplex into 2 elementary
streams( one would be MP4-V-ES ) and other would be AAC supported
audio stream(elementary).
If my understanding is correct we dont
have support for AAC ES right? How hard would it be for me to
incorporate this support.
 Alternatively the SimpleRTPSink
might be useful for any type of information, but we have no support
for a framer class for the AAC audio type right?

AAC audio should be streamed using the "MPEG4GenericRTPSink"
class.  (See the "ADTSAudioFileServerMediaSubsession"
for an example.)

Note also that we have a perfectly good RTSP server
implementation.  You don't need to use a separate 'Darwin
Streaming Server'.
-- 


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

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