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README.md

echotest demo

A minimal example demonstrating how you can use minnie-janus with the echotest plugin shipped with janus-gateway.

It will show two video elements on an otherwise empty page. On the left: the local raw audio/video directly coming from the web cam; and on the right: the audio/video echoed back by the server.

To keep things simple, the JavaScript pendant echotest-plugin.js of the server-side C plugin (janus_echotest.c) only supports the following:

  • Turn on/off video
  • Turn on/off audio
  • Limit the overall bitrate

However, it is trivial to add the rest of the server-side plugin features.

This demo application (see index.js) will create one Session instance (from ../src/session.js) and one EchotestPlugin instance (see echotest-plugin.js) inheriting from BasePlugin (from ../src/base-plugin.js). Both instances are attached to window so you can directly access them in the development console as global variables session and echotestPlugin, for example:

echotestPlugin.enableVideo(false);
echotestPlugin.enableVideo(true);
echotestPlugin.enableAudio(false);
echotestPlugin.enableAudio(true);
echotestPlugin.setBitrate(100000); // bits/second

echotestPlugin.detach();
session.destroy();

How to run this demo

Preconditions:

  1. The echotest demo (browser app), as shipped with Janus, works. This is to exclude potential problems with janus-gateway itself.
  2. There should be no NAT or firewall between your host and Janus so that there is no need for STUN/TURN servers.
  3. The Websocket server of Janus listens at ws://localhost:8188 . If the URL is different, change it in index.js.
  4. Use a fairly recent web browser.

Then install dependencies and start the web server:

npm ci
npm run dev

Open the URL displayed in the terminal.