[Speex-dev] Speex and RTP

[Jean-Marc Valin]

> I believe there is new resampling functionality in the speex svn head,
> although I haven't tested it yet. You might also want to check out
> 'Secret Rabbit Code' for your resampling.

Yes, I've just been working on a resampler recently. Its changing a lot,
but it's now usable. I'd actually be quite happy to have some feedback
on it.

	Jean-Marc


> Hope this helps.
> Dave
> 
> 
> ________________________________
> 
> 	From: speex-dev-bounces at xiph.org
> [mailto:speex-dev-bounces at xiph.org] On Behalf Of Randy Schefiele
> 	Sent: Saturday, 3 February 2007 7:12 AM
> 	To: speex-dev at xiph.org
> 	Subject: [Speex-dev] Speex and RTP
> 	
> 	
> 	Hi -
> 	
> 	I am currently developing a RTSP/RTP/SDP solution to stream
> Speex encoded data.  Using my current source, I have successfully
> streamed u-law and PCM encoded audio but have been unsuccessful thus far
> with Speex.
> 	
> 	Because of some constraints of my system, I am encoding audio at
> 11.025kHz.  I am still using the 160 samples per frame which makes my
> frame size 28 bytes.  I have successfully written the SDP needed to
> describe the Speex stream but I haven't found a player that will play
> the stream.  I could be doing something wrong, but does anyone know of
> any players that can play RTP Speex streams so I can be sure that my
> solution is incorrect?
> 	
> 	Also, I have looked over the draft RFC of the Speex RTP payload
> and I was curious to know if, because I am not using a standard sample
> rate, my solution will work.  In the draft RFC (and the Speex manual for
> that matter) it always refers to Speex frames containing 20ms of audio.
> In my case, a Speex frame actually contains roughly 14.5 seconds of
> audio.  Am I going to need to hack the Speex encoder to make my frames
> be 20ms in order for the RTP to successfully play?
> 	
> 	Any advice/help anyone can give would be greatly appreciated.
> 	
> 	Thanks!
> 	Randy
> 	
> 
> 	
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