Pavol Travnik pavoltravnik

tmux Cheat Sheet

Table of Contents

General Usage
Shortcuts
Commands
Scripting tmux
Configuring tmux

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

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:

	// Requires https://plugins.jenkins.io/mask-passwords to run

	/**
	* Runs code with secret environment variables and hides the values.
	*
	* @param varAndPasswordList - A list of Maps with a 'var' and 'password' key. Example: `[[var: 'TOKEN', password: 'sekret']]`
	* @param Closure - The code to run in
	* @return {void}
	*/
	def withSecretEnv(List<Map> varAndPasswordList, Closure closure) {

	// define the bitbucket project + repos we want to build
	def bitbucket_project = 'myproj'
	def bitbucket_repos = ['myrepo1', 'myrepo2']

	// create a pipeline job for each of the repos and for each feature branch.
	for (bitbucket_repo in bitbucket_repos)
	{
	multibranchPipelineJob("${bitbucket_repo}-ci") {
	// configure the branch / PR sources
	branchSources {

 def manager = org.jenkins.plugins.lockableresources.LockableResourcesManager.get()
 def resources = manager.getResources().findAll{
   !it.locked
 }
 resources.each{
 	manager.getResources().remove(it)
 }
 manager.save()

	<!-- MIT License -->
	<html>
	<head>
	<script>
	function generateKey(alg, scope) {
	return new Promise(function(resolve) {
	var genkey = crypto.subtle.generateKey(alg, true, scope)
	genkey.then(function (pair) {
	resolve(pair)
	})

	var crypto = require('crypto')
	, fs = require('fs')

	// Algorithm depends on availability of OpenSSL on platform
	// Another algorithms: 'sha1', 'md5', 'sha256', 'sha512' ...
	var algorithm = 'sha1'
	, shasum = crypto.createHash(algorithm)

	// Updating shasum with file content
	var filename = __dirname + "/anything.txt"

	# use ImageMagick convert
	# the order is important. the density argument applies to input.pdf and resize and rotate to output.pdf
	convert -density 90 input.pdf -rotate 0.5 -attenuate 0.2 +noise Multiplicative -colorspace Gray output.pdf

	$(function () {
	"use strict";

	// for better performance - to avoid searching in DOM
	var content = $('#content');
	var input = $('#input');
	var status = $('#status');

	// my color assigned by the server
	var myColor = false;