[pulseaudio-discuss] Desperation with idling

Lennart Poettering lennart at poettering.net
Thu Oct 15 19:57:29 PDT 2009

On Tue, 13.10.09 10:58, Alvaro Alonso Jiménez (alvaroalo at gmail.com) wrote:

> Ok, I will try to be more explicit.
> I am trying to grab the sound of some applications using the parec tool. I
> want to have independent audio sinks, one for each application, task that I
> have accomplished creating different null-sinks, redirecting the audio
> streams of that applications to that sinks, and finally, specifying the
> corresponding monitors when using parec.
> The problem comes from the fact that when the application I want to grab the
> sound from has no sound - I am testing it with firefox and a website with no
> sound -, and the sink is one of those I have just created. In these
> conditions, when executing parec, the program states blocked waiting for an
> audio stream - and despite having the module suspend-on-idle disabled -. If
> the application has sound - firefox with a website with sound -, everything
> works fine!!!!

Hmm, a sink to which monitor source you connect will hand you audio as
long as it is not suspended. module-suspend-on-idle will autosuspend
things for you after 2s. So, consider disabling that.

You can use "pacmd ls" to verify the current state of a sink. As long
as it is not marked as "SUSPENDED" you should get audio, and if there
is nothing playing you should get silence, but you really should get it.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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