Object Detection on live Video Stream using Node-RED

This repository contains Node-RED flow examples that demonstrate how to detect objects using video stream from either DJI Tello Drone or a Raspberry Pi using the Node-RED visual editor.

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Introduction

Have you ever wanted to detect objects using live video stream ? Well if so this repo will show you how to get started.

This example will be using the node-red-contrib-ffmpeg node. This node allows users to stream video from either a tello drone or a raspberry pi. See this repo on instructions on how to video stream

Steps to get started with Tello Drone

1. Install Node-RED

2. Install node-red-contrib-ffmpeg : npm install node-red-contrib-ffmpeg

3. Install ffmpeg brew install ffmpeg once installed run : ffmpeg

4. Train an object detection model - you can follow these instructions on how to do so. You should end up with a model_web folder.

5. Copy your mode_web folder in the directory you installed node red

6. In the node-red directory make the following changes to the settings.js folder Search and un-comment out the following

    httpAdminRoot: '/editor',
    httpStatic: '/<homefolder>/.node-red',
    
   

7. Run Node-Red by running this command : node-red

8. Go to http://127.0.0.1:1880/editor/ in your browser

9. Import Tello-Drone flow

10. Turn Tello Wifi on

11. Inject Command and then streamon in the flow

Flow should look like :

12. In another tab , go to : http://127.0.0.1:1880/api/dashboard

Output should look like :

You should see live streaming with tello drone

Steps To get started with Raspberry Pi

1 . Confirm you have Node-RED and ffmpeg installed on Raspberry Pi

2. If you don’t have ffmpeg installed follow these instructions to install ffmpeg on pi

3. Train an object detection model - you can follow these instructions on how to do so. You should end up with a model_web folder.

4. Copy your mode_web folder in the directory you installed node red

5. In the node-red directory make the following changes to the settings.js folder

Search and un-comment out the following

 httpAdminRoot: '/editor',
 httpStatic: '/<homefolder>/.node-red',

6. Run Node-Red by running this command : node-red

7. Import the Raspberry Pi flow

Flow should look like this :

8. Deploy and in a different tab go to http://127.0.0.1:1880/api/dashboard

You should see video stream from Raspberry Pi along with object detection 🎉