Still getting lag when sending midi from Processing to Ableton.

Eone

Hello all.

So my code is now advancing but it's still laggy. It receives the data in Ableton but it's very temperamental. I've avoided using delay functions as it delays the entire thing. If anyone has any suggestions or can see any anomalies it would be much appreciated! Thank you :)

import gab.opencv.*;
import processing.video.*;
import ipcapture.*;
import org.opencv.core.Rect;
import themidibus.*; //Import the library


OpenCV opencv;
IPCapture cam;
MidiBus midi; 
int lastMillis;
int [] timestamps = new int [128];

void setup() {
  size(640, 480);
  //video = new Movie(this, "street.mov"); MUTED
  cam = new IPCapture(this, "http://153.201.66.43:60001/mjpg/video.mjpg?resolution=640x480", "", "");
  cam.start();
  opencv = new OpenCV(this, 640, 480);

  opencv.startBackgroundSubtraction(5, 3, 0.5);
  MidiBus.list();
  midi = new MidiBus(this, -1, "Bus 1");

  //video.loop();
  //video.play();
}

void draw() {
  if (cam.isAvailable()) {
    cam.read();
    image(cam, 0, 0);  
    opencv.loadImage(cam);
    opencv.updateBackground();

    opencv.dilate();
    opencv.erode();

    noFill();
    stroke(255);
    strokeWeight(1);

    int rx = 300; 
    int ry = 150;
    int rw = 30;
    int rh = 15;
    rect(rx, ry, rx+rw, ry+rh);

    int rx2 = 10; 
    int ry2 = 10;
    int rw2 = 15;
    int rh2 = 15;
    rect(rx2, ry2, rx2+rw2, ry2+rh2);


    stroke(255, 0, 0);
    strokeWeight(10);
    for (Contour contour : opencv.findContours()) {


      println(contour.getBoundingBox().x);
      println(contour.getBoundingBox().y);
      int x = contour.getBoundingBox().x;
      int y = contour.getBoundingBox().y;

      contour.draw(); 
      {

        int [] numbers = new int [128];

        if (( x > rx && x < rx + rw) && (y > ry && y < ry + rh))

          for (int i = -1; i < timestamps.length; i++)


            midi.sendNoteOn(0, 62, 127);

        timestamps[62] = millis();


        if (millis()>lastMillis+40)
          midi.sendNoteOff(0, 62, 127);

        println(timestamps);
      }
    }
  }
}

nabr

Tip: Also check your latency setting on your Computer.

https://help.ableton.com/hc/en-us/articles/209072249-Understanding-Reduced-Latency-when-Monitoring

https://www.soundonsound.com/techniques/optimising-latency-pc-audio-interface

All drivers up-to-date ?
https://sound.stackexchange.com/questions/22397/asio4all-couldnt-get-beneath-24-ms-latency

Might help
http://www.asio4all.com/

Eone

So you don't think this has anything to do with the code? Does it all look a-okay?

Eone

Also, I don't think it's a problem with Ableton, I think it's a problem with the code. I'm not sure if it stops sending midi from Processing or if Ableton stops receiving midi but in normal circumstances, Ableton runs perfect for me. My mac is pretty well spec'd up and is only a month old.