Bohdan Shtepan virtyaluk

WebM to MP4 using FFmpeg

This FFmpeg command converts a .webm video file to a standard .mp4 file using the libx264 codec for video, aac codec for audio, and a CRF value of 22. The preset is set to 'slow' for higher quality encoding, and the audio bitrate is set to 128 kbps.

If the input and output filenames don't contain spaces, quotation marks or other special characters:

ffmpeg -i input.webm -c:v libx264 -preset slow -crf 22 -c:a aac -b:a 128k output.mp4

Archive.org Scanned Book Downloader Bookmarklet

A simple "1-click" javascript approach to downloading a scanned book from archive.org to read at your leisure on the device of your choosing w/out having to manually screenshot every pages of the book by hand. In short it's a glorified "Save Image As..." approach but consolidated down to "1 click". BTW there may be a much better option than this out there - I just built this as an autistic project to see if it would work.

Demo Video

Obligatory Legal/Disclaimer:

By using this script you agree to delete all book files/images after your 1 hour or 14 days is up! I don't support using this script for any other use cases. After all, none of us have ever kept a library book past it's return date, right?

Oh my zsh.

Install ZSH.

sudo apt install zsh-autosuggestions zsh-syntax-highlighting zsh

Install Oh my ZSH.

Warning - use at your own risk

Remove SentinelOne agent from Mac

Boot into Recovery Mode by holding Cmd+R during reboot
Open Terminal from top menubar
Run /Applications/Utilities/Disk\ Utility.app/Contents/MacOS/Disk\ Utility to open Disk Utility
If your startup disk is encrypted, use Disk Utility to mount it
In Terminal, run chroot /Volumes/Macintosh\ HD
Execute the deletion commands or script

SSH into AWS ec2/ Digitalocean droplet/ or else other PAAS, linux machine

Install Docker

$sudo apt install docker.io
$sudo usermod -aG docker $USER

I already installed docker

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

Default

Powerlevel10k

ACL / Roles + Permissions

https://github.com/djvirgen/virgen-acl Simple and elegant, create your own checks. No middleware?

https://github.com/OptimalBits/node_acl Use as middleware, create your own roles and access. Great choice.

https://github.com/tschaub/authorized Similar to connect roles... but a bit more robust? you can create roles and action, and associate many roles with that action

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	Single User License
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	#
	# Himawari-8 Downloader
	#
	#
	#
	# This script will scrape the latest image from the Himawari-8 satellite, recombining the tiled image,
	# converting it to a JPG which is saved in My Pictures\Himawari\ and then set as the desktop background.
	#
	# http://himawari8.nict.go.jp/himawari8-image.htm
	#