David Whitely davydka

for i in *.mov; do ffmpeg -i "$i" -vf scale=1080:1920 -pix_fmt yuv420p -y `basename "$i" .mp4`x.mp4; done

ffmpeg -y -i assets/%02d.png -c:v libx264 -vf "fps=30,format=yuv420p,pad=ceil(iw/2)*2:ceil(ih/2)*2" -b 1600k mov.mp4

Introduction

This document contains some of the ffmpeg snippets I use most commonly, and typically in the context of converting research-related image data to video. It is not meant to be exhaustive.

	const scrollMania = () => {
	const currentScroll = window.pageYOffset \|\| document.documentElement.scrollTop
	// a 100vh element minus the actual height of the window(aka viewport)
	const testThreshold = heightRef.current.offsetHeight - window.innerHeight

	const end = () => {
	if(currentScroll !== scrollDelta) {
	setScrollDelta(currentScroll)
	}
	return true

	/**
	* useScroll React custom hook
	* Usage:
	* const { scrollX, scrollY, scrollDirection } = useScroll();
	*/

	import { useState, useEffect } from "react";

	export function useScroll() {
	const [lastScrollTop, setLastScrollTop] = useState(0);

	import React from 'react';
	import styled from '@emotion/styled';
	import { css } from '@emotion/core';
	import { CSSTransition } from 'react-transition-group';

	const has = (key, obj) => Object.prototype.hasOwnProperty.call(obj, key);

	const keyframes = [
	'appear',
	'enter',

	import React from "react";

	interface IProps {
	className?: string;
	}

	const Logo: React.FC<IProps> = ({ className }) => {
	return (
	<svg
	xmlns="http://www.w3.org/2000/svg"

	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/id_rsa
	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/github_rsa
	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/mozilla_rsa

	const random = (min: number, max: number) => {
	return Math.floor(Math.random() * (max - min + 1)) + min
	}

	path.join( process.cwd(), 'dist', 'json');
	// etc etc etc

David Whitely davydka

Introduction

Further reading