Live microphone stream between 2 points
Tim Müller
tim at centricular.com
Thu Mar 23 18:39:29 UTC 2017
On Thu, 2017-03-23 at 15:20 -0300, David Ventura wrote:
Hi,
> I've been trying to listen to a microphone that's on the network but
> the latency is too great for it to be acceptable. We are talking
> ethernet, ping <1ms but actual audio latency is (guessed) ~800ms
>
> My pipeline
>
> gst-launch-1.0 alsasrc device=hw:CARD=CODEC,DEV=0 slave-
> method=resample provide-clock=true do-timestamp=true buffer-
> time=20000 ! queue ! audioconvert ! audioresample ! audio/x-
> raw,format=S16LE,channels=2,rate=48000,layout=interleaved !
> multiudpsink clients=192.168.2.208:5003,192.168.2.21:5003
>
> And the receiving end
>
> gst-launch-1.0 udpsrc port=5003 ! audio/x-
> raw,format=S16LE,channels=2,layout=interleaved,rate=$AUDIORATE !
> autoaudiosink
>
> Is there any way to have very fast LAN audio streaming?
Yes. You need to measure where that latency is introduced. Both alsasrc
and alsasink will add a non-trivial amount of latency by default. You
should be able to configure both of these elements for much lower
latency.
Check out gst-inspect-1.0 alsasrc and gst-inspect-1.0 alsasink and play
with the properties.
Cheers
-Tim
--
Tim Müller, Centricular Ltd - http://www.centricular.com
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