socket.on('pose_detection', (msg) => {
    try {
      console.log('ho ricevuto il comando pose_detection '+msg.mode)
      if(msg.mode=="frontal"){
        Jimp.read('./img/foto.png').then(image => {
          image.crop(426, 0, 426, 720);
            image.write('./img/foto.png');
            }).catch(err => {
              console.log(err)
            });
          calcolaDistanza()

      }
      else{
        imageStream.write(msg.bytes)
        exec('ffmpeg -y -i ./imageStream ./img/foto.png', (error, stdout, stderr) => {
          imageStream = fs.createWriteStream('./imageStream', {flags: 'w'})
          if(msg.mode=="section"){
            Jimp.read('./img/foto.png').then(image => {
            image.crop(426, 0, 426, 720);
              image.write('./img/foto.png');
              }).catch(err => {
                console.log(err)
              });
          }
          calcolaDistanza()
          //findUser()
        })
      }

    } catch (error) {
      console.log("Error: write after end")
    }
  })