Stream to a Jitsi room using an RPi and a webcam

stream.js

// Based on https://code.saghul.net/2017/09/streaming-a-webcam-to-a-jitsi-meet-room/
// extended to work on ARM (RPi)

const puppeteer = require('puppeteer');

// Streams the first webcam in the system to the specified Jitsi Meet room. Audio is currently
// not sent, but it can be easily enabled by disabling the corresponding setting in `meetArgs`.
//
// TODO
//   - Detect if we are kicked from the room
//   - Support authenticated deployments
//
// NOTE: only tested on GNU/Linux.

async function main(room, baseUrl='https://meet.jit.si')
{
  const chromeArgs =
  [
    // Disable sandboxing, gives an error on Linux
    '--no-sandbox',
    '--disable-setuid-sandbox',
    // Automatically give permission to use media devices
    '--use-fake-ui-for-media-stream',
    // Silence all output, just in case
    '--alsa-output-device=plug:null',
    // additional args from https://github.com/puppeteer/puppeteer/issues/550
    '--display=:1',
    '--disable-extensions'
  ];

  const meetArgs =
  [
    // Disable receiving of video
    'config.channelLastN=0',
    // Mute our audio
    'config.startWithAudioMuted=true',
    // Don't use simulcast to save resources on the sender (our) side
    'config.disableSimulcast=true',
    // No need to process audio levels
    'config.disableAudioLevels=true',
    // Disable P2P mode due to a bug in Jitsi Meet
    'config.p2p.enabled=false'
  ];

  const url = `${baseUrl}/${room}#${meetArgs.join('&')}`;
  console.log(`Loading ${url}`);

  const browser = await puppeteer.launch
  ({
    args: chromeArgs,
    handleSIGINT: false,
    defaultViewport: {width: 1920, height: 1080},
    headless: false,
    // make sure it's there
    executablePath: '/usr/bin/chromium-browser'
  });
  const page = await browser.newPage();

  // Manual handling on SIGINT to gracefully hangup and exit
  process.on('SIGINT', async () =>
  {
    console.log('Exiting...');
    await page.evaluate('APP.conference.hangup();');
    await page.close();
    browser.close();
    console.log('Done!');
    process.exit();
  });

  await page.goto(url);

  try
  {
    const watchDog = page.waitForFunction('window.APP.conference._room !== undefined');
    await watchDog
    await page.evaluate('APP.conference._room.setDisplayName("Streamer");');
  }
  catch(e) { console.error(e) }

  console.log('Running...');
}

main(process.argv[2] || 'test123');