Mike Swierenga Mierenga

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

Editors

resources

Convert MOV to GIF using FFmpeg and ImageMagick

I tried a few different techniques to make a GIF via command-line and the following gives me the best control of quality and size. Once you're all setup, you'll be pumping out GIFs in no time!

Preparation

Install FFmpeg

$ brew install ffmpeg [all your options]
- Example: $ brew install ffmpeg --with-fdk-aac --with-ffplay --with-freetype --with-frei0r --with-libass --with-libvo-aacenc --with-libvorbis --with-libvpx --with-opencore-amr --with-openjpeg --with-opus --with-rtmpdump --with-schroedinger --with-speex --with-theora --with-tools

Install ImageMagick

	/*
	* I've used blessed to create a textbox at the bottom line in the screen.
	* The rest of the screen is the 'body' where your code output will be added.
	* This way, when you type input, your program won't muddle it with output.
	*
	* To try this code:
	* - $ npm install blessed --save
	* - $ node screen.js
	*
	* Key points here are:

	import matplotlib.pyplot as plt
	import numpy as np
	import wave
	import sys
	import math
	import contextlib

	fname = 'test.wav'
	outname = 'filtered.wav'

	function encrypt(text){
	var cipher = crypto.createCipher('aes-256-cbc','d6F3Efeq')
	var crypted = cipher.update(text,'utf8','hex')
	crypted += cipher.final('hex');
	return crypted;
	}

	function decrypt(text){
	var decipher = crypto.createDecipher('aes-256-cbc','d6F3Efeq')
	var dec = decipher.update(text,'hex','utf8')