Fwd: Fwd: JACK and gstreamer

Mac <ussndmac@xxxxxxxxxxx> · Tue, 23 Aug 2016 11:52:26 -0400

---------- Forwarded message ----------
From: Mac <ussndmac@xxxxxxxxxxx>
Date: Tue, Aug 23, 2016 at 11:51 AM
Subject: Re:  Fwd: JACK and gstreamer
To: Neil C Smith <neil@xxxxxxxxxxxxxx>

On Tue, Aug 23, 2016 at 11:04 AM, Neil C Smith <neil@xxxxxxxxxxxxxx> wrote:
On 23 August 2016 at 15:52, Mac <ussndmac@xxxxxxxxxxx> wrote:

> I think, in the past (ubuntu pre-16.04) there were settings musicaudiosink

> and audiosink that could specify which JACK sink was to be used by

> gstreamer.

>

> This changed the default behavior of gstreamer which was to connect to the

> first 2 sinks in JACK.

>

> I think, this was the way it was in 0.1 gstreamer.

>

> I've been able to find nothing discussing this for gstreamer 1 or for ubuntu

> 16.04.

Are you sure that wasn't using JACK via PulseAudio?  What are you

using GStreamer from?

AFAIK, settings in GStreamer for defining the ports that the

JackAudioSink connects to are new - you can set the port-pattern

property.

https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-jackaudiosink.html

Best wishes,

Neil

From the JACK audio web page ( www.jackaudio.org/faq/gstreamer_via_jack.html ) :

_______________________________________________________________________________________________________________

    You need the GStreamer JACK audio plugin, which is currently (Fall 2009)
  part of the “bad” plugins collection. Most Linux distributions
  make this available through their normal software install/update systems.
  The name of the package containing this plugin will vary
  from distribution to distribution:
  on Fedora its called “gstreamer-plugins-bad-free-extra”,
  on Ubuntu its called “gst-plugins-bad”, etc. etc.

Next, you need to configure GStreamer to tell it to use this plugin
  for audio output. There are 3 methods available:
    Through the command line using gconf2 (you may need to install this
 first)
Install/run gconf-editor, which is a general purpose utility
 for configuring many GNOME-centric applications.
Some systems may have the gstreamer-properties command available,
 which offers a graphical tool for configuring gstreamer.

Your goal is set the value of:
    /system/gstreamer/0.10/audio/default/musicaudiosink
/system/gstreamer/0.10/audio/default/audiosink

to this value: jackaudiosink buffer-time=2000000. The exact value of
buffer-time doesn’t matter too much, but higher values reduce
the chance of glitches/drop-outs in the audio stream. You might also
choose to set /system/gstreamer/0.10/audio/default/chataudiosink to
the same value, but its less likely to be useful to you.
_______________________________________________________________________________________________________________

It appears neither gconf nor /system/gstreamer/0.10/audio/default/ are resident in 16.04. (I'd guess the later path .../0.10/... would not be there since 16.04 is using gstreamer 1 not 0.10, correct?

Mac

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