PyEncoder plugin expects /usr/bin/kms-py-encoder to be the encoder script. Which basically get frames via stdin and return processed frames back via stdout.

This repository has example encoder script named kms-py-encoder. Only thing you need to do is to implement function process_frame that looks like:

def process_frame(frame):
    # processing code
    frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    frame = cv2.cvtColor(frame, cv2.COLOR_GRAY2BGR)

    return frame

and move script to /usr/bin/.

Overview

This project has such parts:

• Kurento Media Server
• PyEncoder plugin for KMS
• PyEncoder nodejs bindings
• Python encoder script
• Nodejs backend app
• Mobile app
• TURN server (optional)

Test setup

Replace WS_DATA_ENDPOINT to your nodejs backend app url

docker build -t kms-server .
docker run -d --name kms-server -p 8888:8888 -e WS_DATA_ENDPOINT='wss://172.17.0.1:8443/magicmirror' kms-server
cd kurento-magic-mirror/
npm install
npm start