On Feb 10, 2013, at 8:16 AM, Robin Gareus <ro...@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"
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 _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
