crowjdh

List available programs

$ ffmpeg -i <URL.m3u8>

Specifying program

$ ffmpeg -i URL.m3u8 -map <SOURCE_IDX>:p:<PROGRAM_NUMBER> -c copy output.ext

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Terminal Tips & Tricks

• Pretty prompt

  # Start colored text with:
  #   %F{red}
  # End colored text with:
  #   %F{red}
  # %n    : user name
  # %m    : computer name
  # %/    : current dir

crowjdh

This process needs CentOS7 host that has internet connection for creating offline repo.

This particular example illustrates installing nginx specifically, but I think this should work for any other packages.

From CentOS with network connection

host-with-net:/# yum install yum-plugin-downloadonly yum-utils createrepo

host-with-net:/# mkdir -p /root/playground/nginx
host-with-net:/# mkdir -p /root/playground/nginx-installroot

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#!/bin/sh

# We don't need extra husky dependency for a simple task

COMMIT_LINT_HOOK_PATH="$PWD/.custom_git_hooks"
COMMIT_LINT_CMT_MSG_HOOK_PATH="$COMMIT_LINT_HOOK_PATH/commit-msg"

ensure_hook_dir() {
  if [ ! -d "$COMMIT_LINT_HOOK_PATH" ]; then
    mkdir "$COMMIT_LINT_HOOK_PATH"

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#!/bin/zsh

line_lengths=($(git log --pretty=format:%s | awk '{ print length($0) - 9 }'))

sum=0
line_count=${#line_lengths}

for line_length in ${line_lengths[@]}; do
  sum=$((sum + line_length))
done

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Unity as a Library(UaaL)

• Official forum post: https://forum.unity.com/threads/using-unity-as-a-library-in-native-ios-android-apps.685195/
• Sample code: https://github.com/Unity-Technologies/uaal-example

UaaL for iOS

• Instruction: https://forum.unity.com/threads/integration-unity-as-a-library-in-native-ios-app.685219/
• Config Vuforia framework: https://library.vuforia.com/content/vuforia-library/en/articles/Solution/using-vuforia-engine-with-unity-as-a-library.html
  • NativeiOS -> Build Settings -> Framework Search Paths: Add unity project path
• Other approaches to UaaL with Swift:

crowjdh

const fs = require('fs');
const path = require('path');

const target_dir = process.argv[2];

fs.readdir(target_dir, function(err, items) {
  for(var i = 0; i < items.length; i++) {
    nfd_name = items[i];
    nfc_name = items[i].normalize('NFC');
    console.log(`nfd_name: ${nfd_name}\nnfc_name: ${nfc_name}`);

crowjdh

Volume

OVPN_DATA="openvpn-data"
docker volume create --name $OVPN_DATA

Server

docker run -v $OVPN_DATA:/etc/openvpn --log-driver=none --rm mjenz/rpi-openvpn ovpn_genconfig -u udp://your.vpnhost.com

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Build

user@host $ mkdir node-arch && cd node-arch
user@host $ vim Dockerfile

Dockerfile

FROM ubuntu:20.04

RUN apt update && apt install -y vim git libaio1 curl build-essential gettext-base

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Resources

Hardware

• MBP Retina mid 2012

OS

• Main: MacOS Catalina
• Second: Windows 10 Home Edition
• Third: Kali Linux 2020.4

Install Windows via BootCampAssistant