[bump] rygel streaming live audio: low latency?

[Leonardo Gabrielli <l gabrielli univpm it>]

Sorry, for bumping...

Dear rygel-list members,
I'm a phd student in Italy and I'm currently trying to stream live audio 
with rygel to other devices. I succeded in doing this by following a 
method using gstreamer input to rygel, here: 
http://chemicaloliver.net/linux/streaming-audio-from-ubuntu-linux-to-a-dlna-player-blu-ray-or-ps3/
However my goal is to obtain a low latency stream. So far I get 10 
seconds delay from the live input (e.g. my voice speaking numbers to the 
microphone on the rygel machine) to the renderer machine (another linux 
machine with VLC). This is not related with network problems or other 
software layers (sending audio with other systems I get milliseconds 
latency). My opinion is that such a big delay is due to the connection 
mechanism which takes approx 10 seconds: my idea:
- the media renderer connects to rygel
- rygel starts buffering the live audio at once
- in the meanwhile all the handshaking between rygel and the renderer 
begins and takes some time
- when everything is ready rygel starts sending the audio to the 
renderer, beginning from the start of the buffer, which is many seconds 
long now
- from the media renderer you can listen to an audio signal that is 
several seconds old

This could be fixed if rygel starts buffering when the connection is 
ready. THe only latency then would be the one from the network and the 
one from the *short* (128 to 1024 samples) buffer.

I'm not very good in reading or writing code, and I'd like to ask you 
developers if this makes sense to you or this is not the cause of the delay.

Thanks & cheers

--

Leonardo Gabrielli, PhD student
A3Lab - Dept. Information Engineering
Università Politecnica delle Marche
via Brecce Bianche 31, 60131, Ancona, Italy



--

Dr. Leonardo Gabrielli, PhD student
A3Lab - Dept. Information Engineering
Università Politecnica delle Marche
via Brecce Bianche 31, 60131, Ancona, Italy
Skype: leonardo.gabrielli