14 Jun
2015
14 Jun
'15
3:03 p.m.
Peter P:
Hi list,
I am wondering how I could make a VU meter automatically receive all
audio that is sent to specific jack output ports by various
applications, also from those that I will start later on a given day.
thank you for all ideas!
Hi,
jack_capture is able to do exactly what you ask for.
jack_capture is mainly made for recording audio,
but to avoid recording anything, just run it in "timemachine"
mode:
$ jack_capture --meterbridge --timemachine --port system:playback_1 --port
system:playback_2
(make sure "meterbridge" is installed)
14 Jun
14 Jun
7 p.m.
New subject: make a VU meter listen to jack output ports
* Kjetil Matheussen <k.s.matheussen(a)gmail.com> [2015-06-14 09:03]:
Peter P:
Thanks Kjetil,
I found out that meterbridge can connect to the system:playback_N ports
itself, but running it via jack_capture gives me persistent connections.
Thanks, this is great and works fine for me as
jack_capture --meterbridge --meterbridge-type dpm --timemachine --port system:playback_1
--port system:playback_2 /dev/null
Hi list,
I am wondering how I could make a VU meter automatically receive all
audio that is sent to specific jack output ports by various
applications, also from those that I will start later on a given day.
thank you for all ideas!
Hi,
jack_capture is able to do exactly what you ask for.
jack_capture is mainly made for recording audio,
but to avoid recording anything, just run it in "timemachine"
mode:
$ jack_capture --meterbridge --timemachine --port system:playback_1 --port
system:playback_2
(make sure "meterbridge" is installed)
7:16 p.m.
New subject: make a VU meter listen to jack output ports
* Peter P. <peterparker(a)fastmail.com> [2015-06-14 13:00]:
* Kjetil Matheussen <k.s.matheussen(a)gmail.com>
[2015-06-14 09:03]:
Strangely this does not work when I start it from fluxbox' menu, ie.
without a visible (x)terminal. The application (and hence the
meterbridge) close immediately. Do you have an idea why this could
happen?
Thanks Kjetil,
P
Peter P:
Thanks Kjetil,
I found out that meterbridge can connect to the system:playback_N ports
itself, but running it via jack_capture gives me persistent connections.
Thanks, this is great and works fine for me as
jack_capture --meterbridge --meterbridge-type dpm --timemachine --port system:playback_1
--port system:playback_2 /dev/null Hi list,
I am wondering how I could make a VU meter automatically receive all
audio that is sent to specific jack output ports by various
applications, also from those that I will start later on a given day.
thank you for all ideas!
Hi,
jack_capture is able to do exactly what you ask for.
jack_capture is mainly made for recording audio,
but to avoid recording anything, just run it in "timemachine"
mode:
$ jack_capture --meterbridge --timemachine --port system:playback_1 --port
system:playback_2
(make sure "meterbridge" is installed)
7:22 p.m.
New subject: make a VU meter listen to jack output ports
* Peter P. <peterparker(a)fastmail.com> [2015-06-14 13:16]:
* Peter P. <peterparker(a)fastmail.com>
[2015-06-14 13:00]:
Sorry, I posted before doing my homework
The --disable-console option helped here.
Thanks again,
P
* Kjetil Matheussen
<k.s.matheussen(a)gmail.com> [2015-06-14 09:03]:
Strangely this does not work when I start it from fluxbox' menu, ie.
without a visible (x)terminal. The application (and hence the
meterbridge) close immediately. Do you have an idea why this could
happen? Peter P:
Thanks Kjetil,
I found out that meterbridge can connect to the system:playback_N ports
itself, but running it via jack_capture gives me persistent connections.
Thanks, this is great and works fine for me as
jack_capture --meterbridge --meterbridge-type dpm --timemachine --port system:playback_1
--port system:playback_2 /dev/null Hi list,
I am wondering how I could make a VU meter automatically receive all
audio that is sent to specific jack output ports by various
applications, also from those that I will start later on a given day.
thank you for all ideas!
Hi,
jack_capture is able to do exactly what you ask for.
jack_capture is mainly made for recording audio,
but to avoid recording anything, just run it in "timemachine"
mode:
$ jack_capture --meterbridge --timemachine --port system:playback_1 --port
system:playback_2
(make sure "meterbridge" is installed)
7:49 p.m.
New subject: make a VU meter listen to jack output ports
* Peter P. <peterparker(a)fastmail.com> [2015-06-14 13:22]:
[...]
But I am afraid the the meters still don't come up every time.
The --no-stdin does not help as well, but has other unpleasant results.
It seems that jack_capture needs to have a console it can output things
to.
Strangely this
does not work when I start it from fluxbox' menu, ie.
without a visible (x)terminal. The application (and hence the
meterbridge) close immediately. Do you have an idea why this could
happen?
Sorry, I posted before doing my homework
The --disable-console option helped here. From ~/.fluxbox/menu I am starting it as
jack_capture -dc --meterbridge --meterbridge-type dpm --timemachine --port
system:playback_1 --port system:playback_2 /dev/null
and in .xsession-errors I get
>> Warning. Could not set higher priority for a
SCHED_FIFO process
>> using setpriority().
>> Waiting to start recording of "/dev/null"
>> Press <Ctrl-C> to stop recording and quit.
>> Recording. Press <Return> to stop.
Finished.
>> Error: exec returned.
>> jack_capture encountered 1 jack x-runs.
Furthermore, automatically reconnecting to jack applications which play
back audio, does only happen if jack_capture/meterbridge have been
started when that application (mplayer in my case) was already playing
back.
Thank you for any hints,
P
8:31 p.m.
New subject: make a VU meter listen to jack output ports
On Sun, Jun 14, 2015 at 7:49 PM, Peter P. <peterparker(a)fastmail.com> wrote:
* Peter P. <peterparker(a)fastmail.com>
[2015-06-14 13:22]:
[...]
But I am afraid the the meters still don't come up every time.
The --no-stdin does not help as well, but has other unpleasant results.
It seems that jack_capture needs to have a console it can output things
to.
Maybe it's possible to start an invisible terminal thats jack_capture.
I don't know how to do that though. Maybe there's a general X option
for starting a program minimized? (I tried googling it, but didn't find any)
Strangely
this does not work when I start it from fluxbox' menu, ie.
without a visible (x)terminal. The application (and hence the
meterbridge) close immediately. Do you have an idea why this could
happen?
Sorry, I posted before doing my homework
The --disable-console option helped here. Furthermore, automatically reconnecting to jack
applications which play
back audio, does only happen if jack_capture/meterbridge have been
started when that application (mplayer in my case) was already playing
back.
But this is only a problem if you don't run it from a terminal?
8:34 p.m.
New subject: make a VU meter listen to jack output ports
On Sun, Jun 14, 2015 at 8:31 PM, Kjetil Matheussen <k.s.matheussen(a)gmail.com
wrote:
>
>
> On Sun, Jun 14, 2015 at 7:49 PM, Peter P. <peterparker(a)fastmail.com>
wrote:
>
>> * Peter P. <peterparker(a)fastmail.com> [2015-06-14 13:22]:
>> [...]
>> > > Strangely this does not work when I start it from fluxbox' menu,
ie.
>> > > without a visible (x)terminal. The application (and hence the
>> > > meterbridge) close immediately. Do you have an idea why this could
>> > > happen?
>> >
>> > Sorry, I posted before doing my homework
>> > The --disable-console option helped here.
>>
>> But I am afraid the the meters still don't come up every time.
>> The --no-stdin does not help as well, but has other unpleasant results.
>> It seems that jack_capture needs to have a console it can output things
>> to.
>>
>>
> Maybe it's possible to start an invisible terminal thats jack_capture.
> I don't know how to do that though. Maybe there's a general X option
> for starting a program minimized? (I tried googling it, but didn't find
> any)
>
>
Found a solution:
xterm -e 'xwit -iconify ; jack_capture --meterbridge --timemachine --port
system:playback_1 --port system:playback_2'
(BTW, you don't need to add the "--port system:playback_1 --port
system:playback_2" options, since those are the default values)
15 Jun
15 Jun
4:39 p.m.
New subject: make a VU meter listen to jack output ports
* Kjetil Matheussen <k.s.matheussen(a)gmail.com> [2015-06-14 14:31]:
Yes,
when I run from a terminal it reconnects every time indeed.
Thank you so much!
P
On Sun, Jun 14, 2015 at 7:49 PM, Peter P.
<peterparker(a)fastmail.com> wrote:
I
managed to do something like this with GNU screen:
screen -dm jack_capture -dc --meterbridge --timemachine --port system:playback_1
/dev/null
which fires up the meters, and auto-(re)connects nicely. Now the problem
remains, once I close the meters by closing their window (clicking the X
in my windown manager's window decoration) jack_capture itself will
continue to run, as it is waiting for user input.
* Peter P. <peterparker(a)fastmail.com>
[2015-06-14 13:22]:
[...]
But I am afraid the the meters still don't come up every time.
The --no-stdin does not help as well, but has other unpleasant results.
It seems that jack_capture needs to have a console it can output things
to.
Maybe it's possible to start an invisible terminal thats jack_capture.
I don't know how to do that though. Maybe there's a general X option
for starting a program minimized? (I tried googling it, but didn't find any) Strangely
this does not work when I start it from fluxbox' menu, ie.
without a visible (x)terminal. The application (and hence the
meterbridge) close immediately. Do you have an idea why this could
happen?
Sorry, I posted before doing my homework
The --disable-console option helped here. Furthermore,
automatically reconnecting to jack applications which play
back audio, does only happen if jack_capture/meterbridge have been
started when that application (mplayer in my case) was already playing
back.
But this is only a problem if you don't run it from a terminal?
3247
days inactive
3248
days old
linux-audio-user@lists.linuxaudio.org
7 comments
2 participants
participants (2)
-
Kjetil Matheussen -
Peter P.