Mixing two sources with Adder

Frédéric Praca frederic.praca at free.fr
Mon Jun 2 00:57:55 PDT 2014

Le Fri, 30 May 2014 09:55:41 +0200,
Sebastian Dröge <sebastian at centricular.com> a écrit :

> On Mi, 2014-05-28 at 09:09 +0200, Frédéric Praca wrote:
> > Hello guys,
> > I would like to use two PulseAudio sources, one from the microphone
> > and one from a pipe using PulseAudio module-pipe-source.
> > In my Gstreamer pipeline, I use adder to "mix" the two sources.
> > The problem is that as long as the pipe source has not provided
> > data, the pipeline is blocked.
> > I was expecting the pipeline to deal with the microphone meanwhile,
> > even if I didn't write any data in the pipe.
> > Is there a way to mix two sources without blocking on one ?
> Currently it's not possible easily as adder (and everything
> collectpads based) will wait until data is available on all pads.
> There are some plans to improve this, especially for live streams, but
> no timeline for that yet.
Ok, thanks for this explanation.
> For now you could only link the sources to the adder (also better use
> audiomixer) when they actually produce data, and remove them when they
> don't again.
I will try this and try also to find a solution on PulseAudio side



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