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Installing the NVIDIA driver, CUDA and cuDNN on Linux (Ubuntu 20.04)

This is a companion piece to my instructions on building TensorFlow from source. In particular, the aim is to install the following pieces of software

NVIDIA graphics card driver (v450.57)
CUDA (v11.0.2)
cuDNN (v8.0.2.39)

on an Ubuntu Linux system, in particular Ubuntu 20.04.

Fractional Indexing (David Greenspan)

Source references:

https://observablehq.com/@dgreensp/implementing-fractional-indexing

Rust

https://github.com/sh-tiye/lexicon-fractional-index
- License: Listed as MIT on crates.io, but readme says "License: TODO".

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

Building ffmpeg with x265 NEON arm64 cpu acceleration support

Current static binaries do not target https://bitbucket.org/multicoreware/x265_git/issues/563/patch-neon-arm64-improvements which can be identified

Before

x265 [info]: using cpu capabilities: none!

[libx264 @ 0xaaab0a5fc000] using cpu capabilities: ARMv8 NEON

	;;; nano-org-wip.el --- N Λ N O org mode -- lexical-binding: t --

	;; Copyright (C) 2024 Nicolas P. Rougier
	;; Maintainer: Nicolas P. Rougier <Nicolas.Rougier@inria.fr>

	;; This file is not part of GNU Emacs.

	;; This file is free software; you can redistribute it and/or modify
	;; it under the terms of the GNU General Public License as published by
	;; the Free Software Foundation; either version 3, or (at your option)

	'''
	https://arxiv.org/abs/2312.00858
	1. put this file in ComfyUI/custom_nodes
	2. load node from <loaders>

	start_step, end_step: apply this method when the timestep is between start_step and end_step
	cache_interval: interval of caching (1 means no caching)
	cache_depth: depth of caching
	'''

	Available stats:
	Ai - Carving.ApplyResults - TimeNanoseconds
	Ai - Carving.BuildBVTree - TimeNanoseconds
	Ai - Carving.Clipping - TimeNanoseconds
	Ai - Carving.ConvexHulls - TimeNanoseconds
	Ai - Carving.Prepare - TimeNanoseconds
	Ai - Carving.ProjectVertices - TimeNanoseconds
	Ai - CollectSources - TimeNanoseconds
	Ai - Colliders - TimeNanoseconds
	Ai - Components.NavMeshAgent.SendMessage - TimeNanoseconds

	// ==UserScript==
	// @name YouTube Shorts Auto Next
	// @description Automatically plays the next YouTube short.
	// @version 2024-03-02
	// @author Santeri Hetekivi
	// @match https://www.youtube.com/shorts/*
	// @icon https://www.google.com/s2/favicons?sz=64&domain=youtube.com
	// @grant none
	// @license Apache-2.0
	// ==/UserScript==

	var mediaJSON = { "categories" : [ { "name" : "Movies",
	"videos" : [
	{ "description" : "Big Buck Bunny tells the story of a giant rabbit with a heart bigger than himself. When one sunny day three rodents rudely harass him, something snaps... and the rabbit ain't no bunny anymore! In the typical cartoon tradition he prepares the nasty rodents a comical revenge.\n\nLicensed under the Creative Commons Attribution license\nhttp://www.bigbuckbunny.org",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" ],
	"subtitle" : "By Blender Foundation",
	"thumb" : "images/BigBuckBunny.jpg",
	"title" : "Big Buck Bunny"
	},
	{ "description" : "The first Blender Open Movie from 2006",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4" ],