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!
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