Interactive video from mic. POSSIBLE?

** Hi! :) I am trying to come up with some interactive video stuff, so I decided to try smth with Processing. So to see if interactivity is even working smooth I tried to make controllable video. The question- Whats wrong with the code if I want to control the speed of the video with sound intensity (video should go faster if the participant actively speaks/sings/make noises etc., but if it's quite it should get slower, maybe even go reverse)? And should I dig deeper to trying make some interactive video with Processing or should I better find other software, that could be more suitable for that kind of thing...? **

import processing.video.*;
import processing.sound.*;

AudioIn input;
Amplitude rms;
int speed=3;

Movie video;

void setup(){
  size(640,360);
  frameRate(25);
  video=new Movie(this, "gliemezis.mov");
  video.loop();
  video.speed(speed);

  input = new AudioIn(this, 0);
  input.start();
  rms = new Amplitude(this);
  rms.input(input);

}

void movieEvent (Movie video) {
  video.read();
}

void draw(){
 image(video,0,0, width,height);
 speed=int(map(rms.analyze(), 0, 0.5,0, 5));
 video.speed(speed);
}