H.F. JiangXL

(from https://www.scivision.co/numpy-image-bgr-to-rgb/)

Numpy / OpenCV image BGR to RGB

Conversion between any/all of BGR, RGB, and GBR may be necessary when working with Matplotlib expects M x N x 3 image, where last dimension is RGB.

OpenCV expects M x N x 3 image, where last dimension is BGR.

Scientific Cameras, some of which output an M X N x 3 image, where last dimension is GBR

https://github.com/aancel/admin/wiki/VirtualGL-on-Ubuntu

https://virtualgl.org/About/Introduction

https://www.turbovnc.org

VirtualGL

When you use ssh with X forwarding, you might have noticed that you cannot execute programs that require 3D acceleration. That's where VirtualGL comes into play.

X11vnc Systemd Unit File

This Systemd unit file starts X11VNC on boot

Set VNC password: sudo x11vnc -storepasswd [YOUR VNC PASSWORD] /etc/x11vnc.passwd
Install Systemd Unit File

sudo cp [path to]/vnc.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable vnc.service

Installing NFS inside LXC Container on Proxmox 5.1

Host Setup:

Create LXC Container as usual, but do not start it yet.

# Install NFS-Kernel on Host
apt install nfs-kernel-server

Pixelbook or Pixel Slate Setup

Partly updated June 2023

General caution: Chrome OS is a secure OS by design, but this has at least one key consequence. If you change your Google account password, you will still be required to enter the old password the next time you access each Chrome OS device. Devices are encrypted with that password, so the OS needs to decrypt using the old password then re-encrypt using the new one. If you forget your old password you will lose access to your Chrome OS device data. As always, make sure you keep backups up to date.

Fast User Switching

If you have multiple Chrome OS accounts (Say, work and play), you can quickly sitch between them without logging out:

iPhone Tethering to Raspberry Pi

Instruction

On RPi

sudo apt-get install usbmuxd
connect iPhone

On iPhone

Trust

	# -- coding: utf-8 --
	"""
	Animated 3D sinc function
	"""

	from pyqtgraph.Qt import QtCore, QtGui
	import pyqtgraph.opengl as gl
	import pyqtgraph as pg
	import numpy as np
	import sys

	#EXTINF:-1,CCTV-1
	rtp://239.3.1.1:8000

	#EXTINF:-1,CCTV-2
	rtp://239.3.1.2:8004

	#EXTINF:-1,CCTV-4
	rtp://239.3.1.4:8216

	#EXTINF:-1,CCTV-7

	#!/bin/sh

	# Author : Wang Poh Peng
	# Description : Use FFMPEG to download videos into mkv or mp4 format

	RED='\033[1;31m'
	NC='\033[0m' # No Color
	GREEN='\033[0;32m'
	CYAN='\033[0;36m'