Lloyd Henning eldog

Creating a 300dpi CMYK PDF from an SVG (on Linux)

SVGs generated from the web, and any SVGs from Inkscape, will be in the RGB colorspace. To convert it to CMYK for printing, there are basically two major steps: Converting the SVG to a PDF, and then converting the PDF from RGB to CMYK.

Note that CMYK and RGB are literally different types of color; there is not and cannot be a 1:1 correspondence between their colors, so if you need to regularly design for print you should be using CMYK from the beginning (not tacking it on at the end) -- and for that, unfortunately, the only option is Adobe Illustrator.

Anyway, this is what worked for me to convert an RGB SVG to a CMYK PDF with a specific DPI.

Untested options

compile ffmpeg for arm https://github.com/fiorix/ffmpeg-arm
create youtube 'live event'. get rtmp url + session id
run this:

raspivid -o - -t 0 -vf -hf -fps 30 -b 6000000 | ffmpeg -re -ar 44100 -ac 2 -acodec pcm_s16le -f s16le -ac 2 -i /dev/zero -f h264 -i - -vcodec copy -acodec aac -ab 128k -g 50 -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/<SESSION>

you can tweak -b and -fps to your liking. the settings above work well for 1080p. by not specifying width or height we get the full 1920x1080 resolution from the raspi camera

How to patch Ubuntu for Heartbleed

sudo apt-get update
sudo apt-get install -y libssl1.0.0 openssl
openssl version -a and confirm the "built on" date is >= 2014-04-07
sudo lsof -n | grep ssl | grep DEL and restart all listed services.

Repeat #4 until no results are returned.

Update: 2023/11/30 Bruce Momjian's take on things: https://momjian.us/main/blogs/pgblog/2023.html#November_22_2023

Given a table...

CREATE TABLE foo (
  id SERIAL PRIMARY KEY,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
  ...
);

	<html>
	<head>
	<script src="qrc:///qtwebchannel/qwebchannel.js"></script>
	<style>
	::selection {
	background:transparent;
	}
	</style>
	</head>

	class LowPassFilter {
	constructor(alpha) {
	this.setAlpha(alpha);
	this.y = null;
	this.s = null;
	}

	setAlpha(alpha) {
	if (alpha <= 0 \|\| alpha > 1.0) {
	throw new Error();

	Node* planeNode = scene_->CreateChild("Plane");
	planeNode->SetScale(Vector3(100.0f, 1.0f, 100.0f));
	StaticModel* planeObject = planeNode->CreateComponent<StaticModel>();
	planeObject->SetModel(cache->GetResource<Model>("Models/Plane.mdl"));

	auto mat = cache->GetResource<Material>("Materials/StoneTiled.xml")->Clone();
	mat->SetRenderOrder(100); // Lower render order to render first
	auto tecs = mat->GetTechniques();
	for (size_t i = 0; i < tecs.Size(); ++i)
	{

	# Example of a script that can be run from the command line and parses out options. This is adapted
	# from the Gut command line interface. The first 2 classes are not to be used directly, they are used
	# by the Options class and can be ignored. Start reading after the Options class to get a feel for
	# how it is used, then work backwards.
	#
	# This could be easily extracted out into a class itself, but in the interest of how it is being used
	# I wanted it all in one file. It is yours to do with what you please, but if you make something out
	# of it, I'd love to hear about it. I'm bitwes on godot forums, github, and bitbucket.
	extends SceneTree

	#!/usr/bin/env python
	import gi
	import sys
	gi.require_version('Gst', '1.0')
	from gi.repository import GObject, Gst
	import cairo


	class Renderer():
	OVERLAY_FRAME_WIDTH = 320

	// memdjpeg - A super simple example of how to decode a jpeg in memory
	// Kenneth Finnegan, 2012
	// blog.thelifeofkenneth.com
	//
	// After installing jpeglib, compile with:
	// cc memdjpeg.c -ljpeg -o memdjpeg
	//
	// Run with:
	// ./memdjpeg filename.jpg
	//