23 Aug
2016
23 Aug
'16
5:53 p.m.
---------- Forwarded message ----------
From: Mac <ussndmac(a)charter.net>
Date: Tue, Aug 23, 2016 at 11:51 AM
Subject: Re: [LAU] Fwd: JACK and gstreamer
To: Neil C Smith <neil(a)neilcsmith.net>
On Tue, Aug 23, 2016 at 11:04 AM, Neil C Smith <neil(a)neilcsmith.net> wrote:
On 23 August 2016 at 15:52, Mac
<ussndmac(a)charter.net> wrote:
gstreamer_via_jack.html ) :
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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.
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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
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/