Derk-Jan Karrenbeld SleeplessByte

Video and audio encoding for playback in Android and iOS devices

This document aims to provide an easy way encode video optimized for playback in mobile devices that use the Android or the iOS operating systems.

libx264 is used for (single or two-pass) video encoding and libfdk_aac for audio encoding.

ffmpeg, libx264 and libfdk_aac settings are optimized for playback quality and compatibility on Android and iOS. There is extensive documentation and references for each of the settings used and contributions are very welcome :)

Docx (and other Office doc) previewer support for ActiveStorage

Converts all document formats using LibreOffice first to PDF and then to an image, using build-in pdf previwer of ActiveStorage

needs: unoconv, a command line tool which uses libreoffice, e.g. apt install unoconv
needs a PDF converter, because libreoffice will make a pdf from the office document, Mupdf oder Poppler are already integrated into ActiveStorage, and poppler is free to use, e.g. apt install poppler-utils

How to fix the multiple-instances of React error when using linked NPM modules that import React as a peer dependency

Back-link your linked module's React dependency back to your application's React

In your app that you are receiving the multiple-version error:

Go to node_modules/react
Run yarn link

In your linked module that also uses React:

Run yarn link react

Orange You Wondering About Contrast?

What is contrast anyway? In this context, we are talking about the contrast of text on a background, and more directly, how well you can read that text. While this may seem simple in concept, the reality is not only challenging but increasingly important. The internet destroyed the printing industry nearly overnight. Where there were once magaine and newsstands, there are now empty spaces. And reading in general had dropped 40% in the last two decades.

And the internet is hard to read. Too hard, and it shouldn't be. There are some old existing standards on contrast and readability, some dating back to the last century, that are part of the problem. When WCAG 2 was being worked on nearly two decades ago, computers used bulky CRT monitors, and the iPhone was still on the drawing board.

Back then, cell phones were nothing but a phone, websites were only on your desktop/laptop, and those sites invariably used the same core websafe fonts & basic HTML colors. Served over

	#!/bin/bash
	# Script to install PostgreSQL and PostGIS on a fresh Amazon Linux instance

	# Installing from source:
	# - GEOS
	# GEOS 3.10+ requires CMake 3+, not readily available on Amazon Linux 2.
	GEOSVER=3.9.2
	GEOSURL=http://download.osgeo.org/geos/geos-${GEOSVER}.tar.bz2

	# - PROJ (GDAL requires 6+; 6.2.1 is the last to use SQLite 3.7; 6.2 had build issues, so 6.1.1)

	import android.content.Context
	import android.graphics.Canvas
	import android.graphics.Color
	import android.graphics.Paint
	import android.util.AttributeSet
	import android.view.View

	private const val N = 16
	private const val PERIOD1 = -10000.0
	private const val PERIOD2 = -500.0

	// ==UserScript==
	// @name dev.to spam filter
	// @version 1
	// @include http*
	// @match ://dev.to/
	// @grant none
	// @run-at document-end
	// ==/UserScript==

	const dev_posts = document.body;

	import type { LoaderFunction, ActionFunction } from "remix";
	import { useLoaderData, useFetcher } from "remix";
	import invariant from "tiny-invariant";
	import cuid from "cuid";
	import React from "react";
	import type { Task, User } from "@prisma/client";
	import { requireAuthSession } from "~/util/magic-auth";
	import { ensureUserAccount } from "~/util/account";
	import { placeCaretAtEnd } from "~/components/range";
	import { getBacklog } from "~/models/backlog";

	import { createHash } from "crypto";
	import fs from "fs";
	import fsp from "fs/promises";
	import path from "path";
	import https from "https";
	import { PassThrough } from "stream";
	import type { Readable } from "stream";
	import type { LoaderFunction } from "remix";
	import sharp from "sharp";
	import type { Request as NodeRequest } from "@remix-run/node";

	/**
	* General-purpose NodeJS CLI/API wrapping the Stable-Diffusion python scripts.
	*
	* Note that this uses an older fork of stable-diffusion
	* with the 'txt2img.py' script, and that script was modified to
	* support the --outfile command.
	*/

	var { spawn, exec } = require("child_process");
	var path = require("path");