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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:

Building Blink on OS X

Blink is a SIP client for various platforms. On OS X they only officially distribute the app in the Mac App Store. However the project is GPLed, so you can build it yourself. Here is how:

Download the source

Blink uses the darcs version control system. Download link.

Open the terminal, and clone the source:

Two way iframe communication

The main difference between the two pages is the method of sending messages. Recieving messages is the same in both.

Parent

Send messages to iframe using iframeEl.contentWindow.postMessage Recieve messages using window.addEventListener('message')

iframe

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Installing Cassandra on Mac OS X

Install Homebrew

Homebrew is a great little package manager for OS X. If you haven't already, installing it is pretty easy:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

	# Installation
	brew install ffmpeg --with-vpx --with-vorbis --with-libvorbis --with-vpx --with-vorbis --with-theora --with-libogg --with-libvorbis --with-gpl --with-version3 --with-nonfree --with-postproc --with-libaacplus --with-libass --with-libcelt --with-libfaac --with-libfdk-aac --with-libfreetype --with-libmp3lame --with-libopencore-amrnb --with-libopencore-amrwb --with-libopenjpeg --with-openssl --with-libopus --with-libschroedinger --with-libspeex --with-libtheora --with-libvo-aacenc --with-libvorbis --with-libvpx --with-libx264 --with-libxvid

	# Easy Peasy
	ffmpeg -i video.mp4 video.webm

	IMPORTANT: this is outdated, go to https://github.com/netroy/Lockets


	"npm install socket-io" & you are ready to go

	NEXTUID=$(dscl . -list /Users UniqueID \| awk 'BEGIN{i=0}{if($2>i)i=$2}END{print i+1}')

	NEXTGID=$(dscl . -list /Groups PrimaryGroupID \| awk 'BEGIN{i=0}{if($2>i)i=$2}END{print i+1}')

	# Run this once
	openssl genrsa -des3 -out ca.key 4096
	openssl req -new -x509 -days 365 -key ca.key -out ca.crt