Fabio Neves fzero

Converting mkv to mp4 with `ffmpeg`

Essentially just copy the existing video and audio stream as is into a new container, no funny business!

The easiest way to "convert" MKV to MP4, is to copy the existing video and audio streams and place them into a new container. This avoids any encoding task and hence no quality will be lost, it is also a fairly quick process and requires very little CPU power. The main factor is disk read/write speed.

With ffmpeg this can be achieved with -c copy. Older examples may use -vcodec copy -acodec copy which does the same thing.

These examples assume ffmpeg is in your PATH. If not just substitute with the full path to your ffmpeg binary.

Single file conversion example

Data Structures

Arrays

A way of storing lists in Ruby

names = ["Faisal", "Sara", "Jane"]

Javascript Closures, IIFE

Today we are going to look at some interesting features of the javascript language. Javascript is a prototype-based language with 1st class functions derived from scheme (and self) languages with a C like syntax.

What is a prototype-based language? It is a language of object-oriented programming in which behaviour (think inheritance) is performed by cloning existing objects (i.e. prototypes). It is also an

Hello, visitors! If you want an updated version of this styleguide in repo form with tons of real-life examples… check out Trellisheets! https://github.com/trello/trellisheets

Trello CSS Guide

“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”

You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?

#Simple Authentication with Bcrypt

This tutorial is for adding authentication to a vanilla Ruby on Rails app using Bcrypt and has_secure_password.

The steps below are based on Ryan Bates's approach from Railscast #250 Authentication from Scratch (revised).

You can see the final source code here: repo. I began with a stock rails app using rails new gif_vault

##Steps

	// path: qmk_firmware/keyboards/gmmk/pro/ansi/keymaps/viapro/config.h
	#pragma once

	#ifdef RGB_MATRIX_ENABLE
	#define RGB_DISABLE_WHEN_USB_SUSPENDED true
	#endif // RGB_MATRIX_ENABLE

	###
	###
	### UPDATE: For Win 11, I recommend using this tool in place of this script:
	### https://christitus.com/windows-tool/
	### https://github.com/ChrisTitusTech/winutil
	### https://www.youtube.com/watch?v=6UQZ5oQg8XA
	### iwr -useb https://christitus.com/win \| iex
	###
	### OR take a look at
	### https://github.com/HotCakeX/Harden-Windows-Security

	# based on https://gist.github.com/twtw/5494223
	# create systemd service file for rails/puma startup
	# 0. [if required: rvm use ruby@default]
	# 1. rvm wrapper default systemd rails
	# 2. put this file in /etc/systemd/system/rails-puma.service
	# 3. systemctl enable rails-puma
	# 4. systemctl start rails-puma
	[Unit]
	Description=Rails-Puma Webserver

	/* bling.js */
	window.$ = document.querySelector.bind(document);
	window.$$ = document.querySelectorAll.bind(document);
	Node.prototype.on = window.on = function(name, fn) { this.addEventListener(name, fn); };
	NodeList.prototype.__proto__ = Array.prototype;
	NodeList.prototype.on = function(name, fn) { this.forEach((elem) => elem.on(name, fn)); };

	Download the certificate with:
	`wget -O config/rds-combined-ca-bundle.pem http://s3.amazonaws.com/rds-downloads/rds-combined-ca-bundle.pem`
	Then connect with:
	`postgres://user:password@amazon-host/db_name?sslmode=require&sslrootcert=config/rds-combined-ca-bundle.pem`

	References:
	http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_PostgreSQL.html#PostgreSQL.Concepts.General.SSL
	https://github.com/jeremyevans/sequel/issues/897
	http://www.postgresql.org/docs/9.3/static/libpq-connect.html#LIBPQ-CONNECT-SSLROOTCERT
	http://dba.stackexchange.com/questions/77811/how-to-connect-to-an-amazon-postgresql-database-using-ssl