sjwilliams

 for filename in *.mp4; do base=${filename#mp4} echo "https://youdomain.com/${filename%.mp4}-900w.mp4";     done

sjwilliams

#!/bin/bash

# https://stackoverflow.com/questions/46145576/stack-multiple-images-in-semitransparent-layers-with-imagemagick

FRAMESDIR=frames
INPUTVIDEO=input.mp4

curl https://cdn.joshwilliams.com/projects/2019/videostack/input.mp4 -o $INPUTVIDEO

mkdir -p $FRAMESDIR

sjwilliams

var shuffleAndValidateFiles = function(files) {
	var F = new Array();
	while (files.length > 0) {
		var N = Math.floor(Math.random()*files.length);

		if ((files[N] instanceof File) && !files[N].hidden) {
			F.push(files[N]);
		}

		files.splice(N,1);

sjwilliams

[].slice.call(document.querySelectorAll('#panel_content_4932_template li')).map(function(el){ return el.textContent.trim();}).filter(function(str){ return /^\S+x\S+$/.test(str) }).forEach(function(str){ var wh = str.split('x'); console.log(str, wh[1]/wh[0]) })

sjwilliams

const isAutoplaySupported = function (callback) {
  var timeout;
  var waitTime = 200;
  var retries = 5;
  var currentTry = 0;
  var elem = document.createElement('video');
  var elemStyle = elem.style;

  function testAutoplay(arg) {
    currentTry++;

sjwilliams

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

sjwilliams

Observables

You don't really need a framework or fancy cutting-edge JavaScript features to do two-way data binding. Let's start basic - first and foremost, you need a way to tell when data changes. Traditionally, this is done via an Observer pattern, but a full-blown implementation of that is a little clunky for nice, lightweight JavaScript. So, if native getters/setters are out, the only mechanism we have are accessors:

var n = 5;
function getN() { return n; }
function setN(newN) { n = newN; }

console.log(getN()); // 5

setN(10);

sjwilliams

#!/bin/bash

# Bash script to install latest version of ffmpeg and its dependencies on Ubuntu 12.04 or 14.04
# Inspired from https://gist.github.com/faleev/3435377

# Remove any existing packages:
sudo apt-get -y remove ffmpeg x264 libav-tools libvpx-dev libx264-dev

# Get the dependencies (Ubuntu Server or headless users):
sudo apt-get update

sjwilliams

Array.prototype.slice.call(document.querySelectorAll('.a-span2 .value')).map(function(value){return Number(value.textContent.replace('$', '').trim())}).reduce(function(a,b){return a + b}, 0);

sjwilliams

#!/bin/sh

# A simple script for remotely rebooting a Ubiquiti UniFi access point
# Version 1.0 (Dec 15, 2015)
# by Steve Jenkins (http://www.stevejenkins.com/)

# Requires sshpass (https://sourceforge.net/projects/sshpass/) which
# is probably available via dnf, yum, or apt on your *nix distro.

# USAGE