index.js

const {writeFile} = require('fs');
const CDP = require('chrome-remote-interface');

const WIDTH = 892;
const HEIGHT = 689;
const URL = 'https://google.com';

let client;
async function getClient() {
  if (!client) {
    client = await CDP();
  }
  return client;
}

async function getPageDomain() {
  const client = await getClient();
  const {Page} = client;
  await Page.enable();
  return Page;
}

async function startScreencast(url) {
  const Page = await getPageDomain();

  await Page.navigate({url});
  await Page.loadEventFired();

  await Page.setDeviceMetricsOverride({width: WIDTH, height: HEIGHT, deviceScaleFactor: 1, mobile: false});

  client.on('Page.screencastFrame', frame => {
    console.log(frame.metadata);

    writeFile(`images\\frame.png`, frame.data, {encoding: 'base64'}, err => {});

    setTimeout(() => {
      Page.screencastFrameAck({sessionId: frame.sessionId});
    }, 500);
  });

  await Page.startScreencast({quality: 100, maxWidth: WIDTH, maxHeight: HEIGHT});
}

startScreencast(URL);

package.json

{
  "name": "screencast",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "chrome-remote-interface": "^0.28.2"
  }
}