10 Feb
2013
10 Feb
'13
8:38 a.m.
I'm looking for a simple tool where I can point it at an http audio stream, define a
number of seconds to detect silence and exit with a non-zero status if silence is
detected. It seems like this should be easy but I've been search high and low for
such a utility and nothing simple exists. Unfortunately I'm not much of a developer,
but this doesn't seem like it would be that difficult. Maybe it's harder than I
think, hence no tool that I can find.
Thanks
-jeremy
10 Feb
10 Feb
12:39 p.m.
On 02/10/2013 08:38 AM, Jeremy Hansen wrote:
I'm looking for a simple tool where I can point it
at an http audio stream, define a number of seconds to detect silence and exit with a
non-zero status if silence is detected. It seems like this should be easy but I've
been search high and low for such a utility and nothing simple exists. Unfortunately
I'm not much of a developer, but this doesn't seem like it would be that
difficult. Maybe it's harder than I think, hence no tool that I can find.
Probably noone needed this precice functionality yet. I would look for
options to assemble this from lower level components:
1] A tool that can read from an http stream and write it into a pipe
(maybe mplayer/mencoder)
2] A tool to convert the stream from the compressed format into a very
low samplerate simple to parse format that reads from that pipe and
writes to another.. (mencoder)
3] A small bash script or python or whatever floats your boat program
that takes the low samplerate, simple to parse output and detects
silences in it. If the silence is "true" silence, something as simple as
searching for a long enough string of 0-bytes is enough..
Flo
--
Florian Paul Schmidt
http://fps.io
1:11 p.m.
On Sun, Feb 10, 2013 at 12:39:17PM +0100, Florian Paul Schmidt wrote:
>I'm looking for a simple tool where I can
point it at an http audio
>stream, define a number of seconds to detect silence and exit with a
>non-zero status if silence is detected. It seems like this should be
>easy but I've been search high and low for such a utility and nothing
>simple exists. Unfortunately I'm not much of a developer, but this
>doesn't seem like it would be that difficult. Maybe it's harder than
>I think, hence no tool that I can find.
Probably noone needed this precice functionality yet.
The radio guys have this stuff to see if their streams are still alive.
Ah, here it is:
http://www.aelius.com/njh/silentjack/
Use any player (mplayer, cvlc, gstreamer) with jackd support to decode
your stream or use the usual anything-to-jackd magic to make your
consumer applications work with jackd.
Something like this:
$ jackd -d dummy (won't terminate and will not output anything)
$ gst-launch uridecodebin uri=http://some.stream/ ! \
audioconvert ! audioresample ! jackaudiosink connect=none
$ mplayer -ao jack,port=SilentJack http://some.stream/
1] A tool that can read from an http stream and write
it into a pipe
(maybe mplayer/mencoder)
mencoder is dead. mplayer, vlc, gstreamer and co are alive.
Cheers
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
2:36 p.m.
On Feb 10, 2013, at 4:11 AM, Adrian Knoth <adi(a)drcomp.erfurt.thur.de> wrote:
On Sun, Feb 10, 2013 at 12:39:17PM +0100, Florian Paul
Schmidt wrote:
I saw this but I was missing all the jack info. I rebuilt mplayer with jack support. I
started jackd per your example:
JACK tmpdir identified as [/dev/shm]
[JACK] cannot open server
Failed to initialize audio driver 'jack'
Could not open/initialize audio device -> no sound.
Perhaps I'm missing a step?
Thanks
> I'm looking for a simple tool where I can
point it at an http audio
> stream, define a number of seconds to detect silence and exit with a
> non-zero status if silence is detected. It seems like this should be
> easy but I've been search high and low for such a utility and nothing
> simple exists. Unfortunately I'm not much of a developer, but this
> doesn't seem like it would be that difficult. Maybe it's harder than
> I think, hence no tool that I can find.
Probably noone needed this precice functionality
yet.
The radio guys have this stuff to see if their streams are still alive.
Ah, here it is:
http://www.aelius.com/njh/silentjack/
Use any player (mplayer, cvlc, gstreamer) with jackd support to decode
your stream or use the usual anything-to-jackd magic to make your
consumer applications work with jackd.
Something like this:
$ jackd -d dummy (won't terminate and will not output anything)
$ gst-launch uridecodebin uri=http://some.stream/ ! \
audioconvert ! audioresample ! jackaudiosink connect=none
$ mplayer -ao jack,port=SilentJack http://some.stream/
1] A tool that can read from an http stream and
write it into a pipe
(maybe mplayer/mencoder)
mencoder is dead. mplayer, vlc, gstreamer and co are alive.
Cheers
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-dev
3:10 p.m.
On Sun, Feb 10, 2013 at 05:36:16AM -0800, Jeremy Hansen wrote:
I saw this but I was missing all the jack info. I
rebuilt mplayer with
jack support. I started jackd per your example:
JACK tmpdir identified as [/dev/shm]
[JACK] cannot open server
Failed to initialize audio driver 'jack'
Could not open/initialize audio device -> no sound.
Perhaps I'm missing a step?
Wild guess: You've started jackd as root or under a different userid
than mplayer. You must not.
You can run jack_lsp to verify your jackd is up and running.
If it shows you some ports, mplayer should work, too.
You may also find the "patchage" tool useful, run it after starting
jackd, and you can see and manage all your jackd clients.
HTH
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
4:43 p.m.
On Feb 10, 2013, at 6:09 AM, Adrian Knoth <adi(a)drcomp.erfurt.thur.de> wrote:
On Sun, Feb 10, 2013 at 05:36:16AM -0800, Jeremy
Hansen wrote:
Thanks. This got further.
I saw this but I was missing all the jack info. I
rebuilt mplayer with
jack support. I started jackd per your example:
JACK tmpdir identified as [/dev/shm]
[JACK] cannot open server
Failed to initialize audio driver 'jack'
Could not open/initialize audio device -> no sound.
Perhaps I'm missing a step?
Wild guess: You've started jackd as root or under a different userid
than mplayer. You must not.
You can run jack_lsp to verify your jackd is up and
running.
I don't see this utility at all.
If it shows you some ports, mplayer should work, too.
You may also find the "patchage" tool useful, run it after starting
jackd, and you can see and manage all your jackd clients.
I don't see patchage either. Using RPMS from the EPEL.
Here's what I see:
[jeremy@serv ~]$ jackd -d dummy
jackd 0.103.0
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK compiled with System V SHM support.
loading driver ..
creating dummy driver ... dummy_pcm|48000|1024|21333|2|2
unknown source port in attempted connection [SilentJack]
unknown source port in attempted connection [SilentJack]
[jeremy@serv ~]$ mplayer -ao jack,port=SilentJack
http://live.skidrowstudios.com:8000/live
MPlayer dev-SVN-r27514-4.1.2 (C) 2000-2008 MPlayer Team
CPU: Intel(R) Xeon(R) CPU X3220 @ 2.40GHz (Family: 6, Model: 15, Stepping: 11)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
Playing http://live.skidrowstudios.com:8000/live.
Resolving live.skidrowstudios.com for AF_INET6...
Couldn't resolve name for AF_INET6: live.skidrowstudios.com
Resolving live.skidrowstudios.com for AF_INET...
Connecting to server live.skidrowstudios.com[54.235.147.151]: 8000...
Name : Skidrow Studios LIVE!
Genre : News/Talk/Music
Website: http://www.skidrowstudios.com
Public : yes
Bitrate: 64kbit/s
Cache size set to 320 KBytes
Cache fill: 2.50% (8192 bytes)
ICY Info: StreamTitle='The Weekly Wrap Up - The Weekly Wrap Up – 02/09/2013 – episode
50/Drew Marks, Rich Slaton';
Cache fill: 10.00% (32768 bytes)
Audio only file format detected.
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
mpg123: Can't rewind stream by 216 bits!
AUDIO: 22050 Hz, 2 ch, s16le, 64.0 kbit/9.07% (ratio: 8000->88200)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
JACK tmpdir identified as [/dev/shm]
AO: [jack] 48000Hz 2ch floatle (4 bytes per sample)
Video: no video
Starting playback...
A: 246.0 (04:05.9) of -0.0 (unknown) 0.6% 18%
[jeremy@serv ~]$ silentjack -v -n SilentJack
JACK tmpdir identified as [/dev/shm]
JACK client registered as 'SilentJack'.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
I tried doing silentjack -c SilentJack, but this didn't work.
[jeremy@serv ~]$ silentjack -c SilentJack
JACK tmpdir identified as [/dev/shm]
JACK client registered as 'silentjack'.
Connecting SilentJack to silentjack:in
connect_jack_port(): failed to jack_connect() ports: -1
Thanks
HTH
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
5:15 p.m.
On 02/10/2013 04:43 PM, Jeremy Hansen wrote:
It should be part of your jackd installation. Since you seem to be on
RHEL, the package is called j-a-c-k-example-clients or something like
this.
This is ancient.
Linux audio is bleeding edge, RHEL is the exact opposite. You may want
to include the CCRMA repository.
Note that you don't necessarily have to update, you're just using it
wrong atm.
You can run
jack_lsp to verify your jackd is up and running.
I don't see this utility at
all. You may also
find the "patchage" tool useful, run it after starting
jackd, and you can see and manage all your jackd clients.
I don't see patchage
either. Using RPMS from the EPEL.
Here's what I see:
[jeremy@serv ~]$ jackd -d dummy
jackd 0.103.0 [jeremy@serv ~]$ mplayer -ao jack,port=SilentJack
http://live.skidrowstudios.com:8000/live
The port= needs further tweaks. That's up to you to figure out what
to put there.
A proper port name looks like "clientname:portname".
[jeremy@serv ~]$ silentjack -v -n SilentJack
JACK tmpdir identified as [/dev/shm]
JACK client registered as 'SilentJack'.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
I tried doing silentjack -c SilentJack, but this didn't work.
See, that's why I recommended to use patchage, where you can simply wire
it up graphically.
Alternatives to patchage: qjackctl, shell
Shell: Once you have your example-clients installed, you can use
$ jack_lsp
to figure out the exact portnames and
$ jack_connect mplayer:foo silentjack:input
or however the ports are called.
I guess you want to add "name=mplayer" to mplayer's jack output module
to prevent it from creating a name that changes every time you restart
mplayer.
Cheers
5:17 p.m.
I actually got it to work! Thanks for your help. I installed the jack example clients
package, which is where the jack_lsp utility is. When I started silentjack like this:
silentjack -c "MPlayer [24538]:out_0" echo "Shit"
as soon as I turned down the levels on the audio source, silentjack did the right thing:
[jeremy@serv ~]$ silentjack -c "MPlayer [24538]:out_0" echo "Shit"
JACK tmpdir identified as [/dev/shm]
JACK client registered as 'silentjack'.
Connecting MPlayer [24538]:out_0 to silentjack:in
**SILENCE**
Shit
**SILENCE**
Shit
**SILENCE**
Shit
When I turned it back up, the echo stopped.
I think all I need for a nagios check is for the command to just exit a non-zero status to
trip nagios.
This is great! Just saved me $400 on a hardware based silence monitor. What's cool
is that since I'm using icecast, I could even have it react to take over the icecast
mount with alternative audio stream.
-jeremy
On Feb 10, 2013, at 7:43 AM, Jeremy Hansen <jeremy(a)skidrow.la> wrote:
On Feb 10, 2013, at 6:09 AM, Adrian Knoth <adi(a)drcomp.erfurt.thur.de> wrote:
On Sun, Feb 10, 2013 at 05:36:16AM -0800, Jeremy
Hansen wrote:
Thanks. This got further.
I saw this but I was missing all the jack info. I
rebuilt mplayer with
jack support. I started jackd per your example:
JACK tmpdir identified as [/dev/shm]
[JACK] cannot open server
Failed to initialize audio driver 'jack'
Could not open/initialize audio device -> no sound.
Perhaps I'm missing a step?
Wild guess: You've started jackd as root or under a different userid
than mplayer. You must not.
You can run jack_lsp to verify your jackd is up
and running.
I don't see this utility at all.
If it shows you some ports, mplayer should work, too.
You may also find the "patchage" tool useful, run it after starting
jackd, and you can see and manage all your jackd clients.
I don't see patchage either. Using RPMS from the EPEL.
Here's what I see:
[jeremy@serv ~]$ jackd -d dummy
jackd 0.103.0
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK compiled with System V SHM support.
loading driver ..
creating dummy driver ... dummy_pcm|48000|1024|21333|2|2
unknown source port in attempted connection [SilentJack]
unknown source port in attempted connection [SilentJack]
[jeremy@serv ~]$ mplayer -ao jack,port=SilentJack
http://live.skidrowstudios.com:8000/live
MPlayer dev-SVN-r27514-4.1.2 (C) 2000-2008 MPlayer Team
CPU: Intel(R) Xeon(R) CPU X3220 @ 2.40GHz (Family: 6, Model: 15, Stepping:
11)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
Playing http://live.skidrowstudios.com:8000/live.
Resolving live.skidrowstudios.com for AF_INET6...
Couldn't resolve name for AF_INET6: live.skidrowstudios.com
Resolving live.skidrowstudios.com for AF_INET...
Connecting to server live.skidrowstudios.com[54.235.147.151]: 8000...
Name : Skidrow Studios LIVE!
Genre : News/Talk/Music
Website: http://www.skidrowstudios.com
Public : yes
Bitrate: 64kbit/s
Cache size set to 320 KBytes
Cache fill: 2.50% (8192 bytes)
ICY Info: StreamTitle='The Weekly Wrap Up - The Weekly Wrap Up – 02/09/2013 – episode
50/Drew Marks, Rich Slaton';
Cache fill: 10.00% (32768 bytes)
Audio only file format detected.
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
mpg123: Can't rewind stream by 216 bits!
AUDIO: 22050 Hz, 2 ch, s16le, 64.0 kbit/9.07% (ratio: 8000->88200)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
JACK tmpdir identified as [/dev/shm]
AO: [jack] 48000Hz 2ch floatle (4 bytes per sample)
Video: no video
Starting playback...
A: 246.0 (04:05.9) of -0.0 (unknown) 0.6% 18%
[jeremy@serv ~]$ silentjack -v -n SilentJack
JACK tmpdir identified as [/dev/shm]
JACK client registered as 'SilentJack'.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
Input port isn't connected to anything.
I tried doing silentjack -c SilentJack, but this didn't work.
[jeremy@serv ~]$ silentjack -c SilentJack
JACK tmpdir identified as [/dev/shm]
JACK client registered as 'silentjack'.
Connecting SilentJack to silentjack:in
connect_jack_port(): failed to jack_connect() ports: -1
Thanks
HTH
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-dev 
5:16 p.m.
On 02/10/2013 08:38 AM, Jeremy Hansen wrote:
I'm looking for a simple tool where I can point it at an http audio
stream, define a number of seconds to detect silence and exit with a
non-zero status if silence is detected. It seems like this should be
easy but I've been search high and low for such a utility and nothing
simple exists. Unfortunately I'm not much of a developer, but this
doesn't seem like it would be that difficult. Maybe it's harder than
I think, hence no tool that I can find.
https://github.com/x42/silan may do the job. It prints ranges or silence
in a file or stream (incl. mp3,aac,wma,ogg,m4a,.. decoding and http,
rtmp stream support thanks to libav/ffmpeg). It is used by airtime
(sourcefabric's radio) to highlight silent ranges.
silan -t 0.1 -s -60d "http://mp2.somafm.com:9016" \
| grep -quiet "Sound Off" \
&& echo " do something"
5:37 p.m.
Thanks. This looks good too!!
-jeremy
On Feb 10, 2013, at 8:16 AM, Robin Gareus <robin(a)gareus.org> wrote:
On 02/10/2013 08:38 AM, Jeremy Hansen wrote:
I'm looking for a simple tool where I can point it at an http audio
stream, define a number of seconds to detect silence and exit with a
non-zero status if silence is detected. It seems like this should be
easy but I've been search high and low for such a utility and nothing
simple exists. Unfortunately I'm not much of a developer, but this
doesn't seem like it would be that difficult. Maybe it's harder than
I think, hence no tool that I can find.
https://github.com/x42/silan may do the job. It prints ranges or silence
in a file or stream (incl. mp3,aac,wma,ogg,m4a,.. decoding and http,
rtmp stream support thanks to libav/ffmpeg). It is used by airtime
(sourcefabric's radio) to highlight silent ranges.
silan -t 0.1 -s -60d "http://mp2.somafm.com:9016" \
| grep -quiet "Sound Off" \
&& echo " do something"
6:57 p.m.
On Feb 10, 2013, at 8:16 AM, Robin Gareus <robin(a)gareus.org> wrote:
On 02/10/2013 08:38 AM, Jeremy Hansen wrote:
This is strange. This works, but I'm unable to grep the output and I'm not sure
why. If I pipe to grep, I get nothing. I tried redirecting stderr to stdout and
doesn't seem to work.
[jeremy@serv src]$ ./silan -t 2.0 -s -40d
"http://live.skidrowstudios.com:8000/live"
Info: signal threshold: 0.010000 ^= -40.000dBFS
0.069569 Sound On
15.814150 Sound Off
Doing the same test:
[jeremy@serv src]$ ./silan -t 2.0 -s -40d
"http://live.skidrowstudios.com:8000/live" | grep "Sound Off"
Info: signal threshold: 0.010000 ^= -40.000dBFS
I get nothing.
Thanks
-jeremy
I'm looking for a simple tool where I can point it at an http audio
stream, define a number of seconds to detect silence and exit with a
non-zero status if silence is detected. It seems like this should be
easy but I've been search high and low for such a utility and nothing
simple exists. Unfortunately I'm not much of a developer, but this
doesn't seem like it would be that difficult. Maybe it's harder than
I think, hence no tool that I can find.
https://github.com/x42/silan may do the job. It prints ranges or silence
in a file or stream (incl. mp3,aac,wma,ogg,m4a,.. decoding and http,
rtmp stream support thanks to libav/ffmpeg). It is used by airtime
(sourcefabric's radio) to highlight silent ranges.
silan -t 0.1 -s -60d "http://mp2.somafm.com:9016" \
| grep -quiet "Sound Off" \
&& echo " do something"
9 Mar
9 Mar
2:49 a.m.
On 02/10/2013 06:57 PM, Jeremy Hansen wrote:
On Feb 10, 2013, at 8:16 AM, Robin Gareus <robin(a)gareus.org> wrote:
long lost reply.
I cannot reproduce this.
It may have be related to (A) using an endless live-stream + (B) stdout
pipe caching. I've just added a flush() command.
HTH,
robin
On 02/10/2013 08:38 AM, Jeremy Hansen wrote:
This is strange. This works, but I'm unable to grep the output and I'm not sure
why. If I pipe to grep, I get nothing. I tried redirecting stderr to stdout and
doesn't seem to work.
[jeremy@serv src]$ ./silan -t 2.0 -s -40d
"http://live.skidrowstudios.com:8000/live"
Info: signal threshold: 0.010000 ^= -40.000dBFS
0.069569 Sound On
15.814150 Sound Off
Doing the same test:
[jeremy@serv src]$ ./silan -t 2.0 -s -40d
"http://live.skidrowstudios.com:8000/live" | grep "Sound Off"
Info: signal threshold: 0.010000 ^= -40.000dBFS
I get nothing.
Thanks
-jeremy
I'm looking for a simple tool where I can point it at an http audio
stream, define a number of seconds to detect silence and exit with a
non-zero status if silence is detected. It seems like this should be
easy but I've been search high and low for such a utility and nothing
simple exists. Unfortunately I'm not much of a developer, but this
doesn't seem like it would be that difficult. Maybe it's harder than
I think, hence no tool that I can find.
https://github.com/x42/silan may do the job. It prints ranges or silence
in a file or stream (incl. mp3,aac,wma,ogg,m4a,.. decoding and http,
rtmp stream support thanks to libav/ffmpeg). It is used by airtime
(sourcefabric's radio) to highlight silent ranges.
silan -t 0.1 -s -60d "http://mp2.somafm.com:9016" \
| grep -quiet "Sound Off" \
&& echo " do something"
4078
days inactive
4105
days old
linux-audio-dev@lists.linuxaudio.org
11 comments
4 participants
participants (4)
-
Adrian Knoth -
Florian Paul Schmidt -
Jeremy Hansen -
Robin Gareus