On 02/10/2013 06:57 PM, Jeremy Hansen wrote: > > 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
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 _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
