Brian Mavity bmavity

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:

Stream tweaks proposal

The stream is a powerful tool, not just for IO, -- but, in the best Unix tradition -- for composition of modules. I've been connecting streams into quite long chains.

Some streams I have written do not alter the data in the stream, but affect it is some way, such as buffering when the stream is paused. pause-stream

Also, I've been writing high level abstractions that communicate via streams, and do some interesting high level stuff, Such as by replicating data, snob and crdt, or multiplexing mux-demux. Another good example is dnode.

These abstractions expose a stream on their interface, and so can be used over any io channel which supports pipe.

The Problem

Standard practices say no non-root process gets to talk to the Internet on a port less than 1024. How, then, could I get Node talking on port 80 on EC2? (I wanted it to go as fast as possible and use the smallest possible share of my teeny tiny little micro-instance's resources, so proxying through nginx or Apache seemed suboptimal.)

The temptingly easy but ultimately wrong solution:

Alter the port the script talks to from 8000 to 80:

}).listen(80);

	using System;
	using System.Collections.Generic;
	using System.Diagnostics;
	using System.IO;
	using System.Net;

	namespace EventStoreService
	{
	public class EventStoreService
	{

	define(function(require) {
	var system = require('../system');

	var animationTypes = [
	'bounce',
	'bounceIn',
	'bounceInDown',
	'bounceInLeft',
	'bounceInRight',
	'bounceInUp',

	public class GetEventStoreEventDispatcher
	{
	private const int RECONNECT_TIMEOUT_MILLISEC = 5000;
	private const int THREAD_KILL_TIMEOUT_MILLISEC = 5000;
	private const int READ_PAGE_SIZE = 500;
	private const int LIVE_QUEUE_SIZE_LIMIT = 10000;

	private readonly IEventBus _eventBus;

	private readonly EventStoreConnection _store;

	// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
	// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

	// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

	// MIT license

	(function() {
	var lastTime = 0;
	var vendors = ['ms', 'moz', 'webkit', 'o'];

	<!DOCTYPE html>
	<head>
	<title>Stay Standalone</title>
	<meta name="apple-mobile-web-app-capable" content="yes">
	<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
	<script src="stay_standalone.js" type="text/javascript"></script>
	</head>
	<body>
	<ul>
	<li><a href="http://google.com/">Remote Link (Google)</a></li>