[LAD] simple silence detection tool

Adrian Knoth adi at drcomp.erfurt.thur.de
Sun Feb 10 12:11:32 UTC 2013

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:


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.


mail: adi at thur.de  	http://adi.thur.de	PGP/GPG: key via keyserver

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