[LAD] simple silence detection tool

Jeremy Hansen jeremy at skidrow.la
Sun Feb 10 16:37:48 UTC 2013

Thanks. This looks good too!!


On Feb 10, 2013, at 8:16 AM, Robin Gareus <robin at 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"

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