silence-detector.js

const Ffmpeg = require(‘fluent-ffmpeg’);
const STREAM_URL = ‘http://icecast.radio24.ch/radio24-rc-96-aac';
const VOLUME_THRESHOLD = -50; // volume threshold

getMeanVolume(STREAM_URL, function(meanVolume){
  if(meanVolume <= VOLUME_THRESHOLD){
    console.log(“WE HAVE A PROBLEM! VOLUME IS TOO LOW!”);
  }else{
    console.log(‘ALL GOOD!’);
  }
});

function getMeanVolume(streamUrl, callback){
 new Ffmpeg({ source: streamUrl })
  .withAudioFilter(‘volumedetect’)
  .addOption(‘-f’, ‘null’)
  .addOption(‘-t’, ‘10’) // duration
  .noVideo()
  .on(‘start’, function(ffmpegCommand){
    console.log(‘Output the ffmpeg command’, ffmpegCommand);
  })
  .on(‘end’, function(stdout, stderr){
   
   // find the mean_volume in the output
    let meanVolumeRegex = stderr.match(/mean_volume:\s(-?[0–9]\d*(\.\d+)?)/);
   
    // return the mean volume
    if(meanVolumeRegex){
      let meanVolume = parseFloat(meanVolumeRegex[1]);
      return callback(meanVolume);
    }
   
    // if the stream is not available
    if(stderr.match(/Server returned 404 Not Found/)){
      return callback(false);
    }
 })
 .saveToFile(‘/dev/null’);
}

Help!!!
SyntaxError: Unexpected token ILLEGAL
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:374:25)
at Object.Module._extensions..js (module.js:417:10)
at Module.load (module.js:344:32)
at Function.Module._load (module.js:301:12)
at Function.Module.runMain (module.js:442:10)
at startup (node.js:136:18)
at node.js:966:3

@etimoteo It should be :

const Ffmpeg = require('fluent-ffmpeg');

const STREAM_URL = 'http://icecast.radio24.ch/radio24-rc-96-aac';
const VOLUME_THRESHOLD = -50; // volume threshold

function getMeanVolume(streamUrl, callback) {
  new Ffmpeg({ source: streamUrl })
    .withAudioFilter('volumedetect')
    .addOption('-f', 'null')
    .addOption('-t', '10') // duration
    .noVideo()
    .on('start', (ffmpegCommand) => {
      console.log('Output the ffmpeg command', ffmpegCommand);
    })
    .on('end', (stdout, stderr) => {
      // find the mean_volume in the output
      const meanVolumeRegex = stderr.match(/mean_volume:\s(-?[0–9]\d*(\.\d+)?)/);

      // return the mean volume
      if (meanVolumeRegex) {
        const meanVolume = parseFloat(meanVolumeRegex[1]);
        return callback(meanVolume);
      }

      // if the stream is not available
      if (stderr.match(/Server returned 404 Not Found/)) {
        return callback(false);
      }
    })
    .saveToFile('/dev/null');
}
getMeanVolume(STREAM_URL, (meanVolume) => {
  if (meanVolume <= VOLUME_THRESHOLD) {
    console.log('WE HAVE A PROBLEM! VOLUME IS TOO LOW!');
  } else {
    console.log('ALL GOOD!');
  }
});

Help!
I don't received an output. Just the first information:

node silent.js
Output the ffmpeg command ffmpeg -i http://192.168.188.59:8443/rapi.mp3 -y -filter:a volumedetect -vn -f null -t 2 /dev/null