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FFmpeg Cheatsheet

Option	Description	Example
`-i`	Input file	`ffmpeg -i input.mp4`
`-vf`	Video filters (apply effects to video)	`ffmpeg -i input.mp4 -vf "scale=1280:720" output.mp4`
`-c:v`	Video codec (specify video compression method)	`ffmpeg -i input.mp4 -c:v libx264 output.mp4`
`-c:a`	Audio codec (specify audio compression method)	`ffmpeg -i input.mp4 -c:a aac output.mp4`

	// getDescription - given a url, this Eleventy filter extracts the meta
	// description from within the <head> element of a web page using the cheerio
	// library.
	//
	// The full html content of the page is fetched using the eleventy-fetch plugin.
	// If you have a lot of links from which you want to extract descriptions, the
	// initial build time will be slow. However, the plugin will cache the content
	// for a duration of your choosing (in this example, it's set to 1 day).
	//
	// The description is extracted from the <meta> element with the name attribute

	// Read from an OPML file and write to a JSON file, processing the OPML file
	// and producing the following for each of the feed items in the file:
	// name: title of the feed (from the title attribute)
	// url: URL of the feed (from the htmlUrl attribute)
	// feed: URL of the feed (from the xmlUrl attribute)
	// feedtype: type of feed (from the type attribute)
	//
	// NOTE: This only extracts feeds from the "CSS" and "Eleventy" outlines.
	// Remove that test if you wish to extract all of the feeds.
	//

	// Types for the result object with discriminated union
	type Success<T> = {
	data: T;
	error: null;
	};

	type Failure<E> = {
	data: null;
	error: E;
	};