Intro

This Project is about to grab Screenshots as PNG in a regular timebase of a webpage. It uses Puppeteer for rendering the webpage. It saves the Screenshot as PNG Images.

Setup

You should have nodejs and npm already installed. Run npm i to install the required dependencies.

How to start

Just execute npm start -- -i <seconds> -u <url>

or

node app/cli.js -i <seconds> -u <url>

with the mandatory attributes -i, --interval and -u, --url

Parameters

• -i, --interval: give the interval between Screenshots in Seconds
• -u, --url: the URL to screenshot
• -o, --outdir (optional): the directory where the Screenshots should be stored. Default is path in the same location of this project
• -f, --filename (optional): the prefix of the Screenshot's Filename. The Script will automatically add a Timestamp in the format YYYYMMDDHHmmss so the target filename would be <filename>-<YYYYMMDDHHmmss>.png

Raspberry Pi Setup on Raspbian

You can not use the Chromium comes with Puppeteer on Raspbian. So install Chromium on your own and refer to it while launching pupeteer Browser.

• Install Chromium e.g. sudo apt-get install chromium
• Reference to the Chromium Installation e.g. /usr/bin/chromium-browser as executablePath Option like pupeteer.launch({executablePath: 'path to chromium'}). See also Puppeteer Launch Options