[LAU] Fwd: Fwd: JACK and gstreamer

[Mac]

---------- Forwarded message ----------
From: Mac <ussndmac at charter.net>
Date: Tue, Aug 23, 2016 at 11:51 AM
Subject: Re: [LAU] Fwd: JACK and gstreamer
To: Neil C Smith <neil at neilcsmith.net>




On Tue, Aug 23, 2016 at 11:04 AM, Neil C Smith <neil at neilcsmith.net> wrote:

> On 23 August 2016 at 15:52, Mac <ussndmac at charter.net> 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/gs
> t-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 ) :

____________________________________________________________
___________________________________________________

   1.

   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.
   2. 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.
   3. 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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