Vittorio Palmisano vpalmisano

Setting up a SSL Cert from Comodo

I use Namecheap.com as a registrar, and they resale SSL Certs from a number of other companies, including Comodo.

These are the steps I went through to set up an SSL cert.

Streaming your Linux desktop to Youtube and Twitch via Nvidia's NVENC and VAAPI:

Considerations to take when live streaming:

The following best practice observations apply when using a hardware-based encoder for live streaming to any platform:

Set the buffer size (-bufsize:v) equal to the target bitrate (-b:v). You want to ensure that you're encoding in CBR mode.
Set up the encoders as shown:

	Frame-type options:
	• --keyint <integer> (x264)
	• -g <integer> (FFmpeg)
	• Keyframe interval, also known as GOP length. This determines the maximum distance between I-frames. Very high GOP lengths will result in slightly more efficient compression, but will make seeking in the video somewhat more difficult. Recommended default: 250

	• --min-keyint <integer> (x264)
	• -keyint_min <integer> (FFmpeg)
	• Minimum GOP length, the minimum distance between I-frames. Recommended default: 25

	• --scenecut <integer> (x264)

	var BASE64_MARKER = ';base64,';

	function convertDataURIToBinary(dataURI) {
	var base64Index = dataURI.indexOf(BASE64_MARKER) + BASE64_MARKER.length;
	var base64 = dataURI.substring(base64Index);
	var raw = window.atob(base64);
	var rawLength = raw.length;
	var array = new Uint8Array(new ArrayBuffer(rawLength));

	for(i = 0; i < rawLength; i++) {

	#! /usr/bin/python2
	import gtk.gdk
	w = gtk.gdk.window_foreign_new( gtk.gdk.get_default_root_window().property_get("_NET_ACTIVE_WINDOW")[2][0] )
	w.set_decorations( (w.get_decorations()+1)%2 ) # toggle between 0 and 1
	gtk.gdk.window_process_all_updates()
	gtk.gdk.flush()

	# now bind this to super-r or something

	#!/bin/bash

	ADB="/home/mrenouf/bin/adb"

	# We need root on the host to mess with networking
	if [[ $(whoami) != "root" ]]; then
	echo "You must be root to run this script!"
	exit 1
	fi;

	See my DASH-IF presentation from October, 2014:
	https://s3.amazonaws.com/misc.meltymedia/dash-if-reveal/index.html#/

	1. encode multiple bitrates with keyframe alignment:
	ffmpeg -i ~/Movies/5D2_Portrait.MOV -s 1280x720 -c:v libx264 -b:v 1450k -bf 2 \
	-g 90 -sc_threshold 0 -c:a aac -strict experimental -b:a 96k -ar 32000 out.mp4

	My input was 30 fps = 3000 ms. If it were 29.97, then a GOP size of 90 frames will yield a base segment
	size of 3003 milliseconds. You can make the segment size some multiple of this, e.g.: 6006, 9009, 12012.

	user web;

	# One worker process per CPU core.
	worker_processes 8;

	# Also set
	# /etc/security/limits.conf
	# web soft nofile 65535
	# web hard nofile 65535
	# /etc/default/nginx

	# Vncserver service file for Debian or Ubuntu with systemd
	#
	# Install vncserver and tools
	# e.g. apt-get install tightvncserver autocutsel gksu
	#
	# 1. Copy this file to /etc/systemd/system/vncserver@:1.service
	# 2. Edit User=
	# e.g "User=paul"
	# 3. Edit the vncserver parameters appropriately in the ExecStart= line!
	# e.g. the -localhost option only allows connections from localhost (or via ssh tunnels)

	var ctx = null, usingWebAudio = true;

	try {
	if (typeof AudioContext !== 'undefined') {
	ctx = new AudioContext();
	} else if (typeof webkitAudioContext !== 'undefined') {
	ctx = new webkitAudioContext();
	} else {
	usingWebAudio = false;
	}