npm install --save ffmpeg.structure.io

var iofs = require('ffmpeg.structure.io')

 var formats = [{
      input: 'test.mp4',
      format: '640x360',
      quality: '360p',
      bandwith: ''
    },{
      input: 'test.mp4',
      format: '848x480',
      quality: '480p',
      bandwith: ''
    }];

iofs.createFileHlsForQuality(formats, function(data){
  //data is true or false
  console.log(data);
});