jbaranski

ffmpeg record screen on Mac M1 chip via command line

Install ffmpeg.

brew install ffmpeg

Figure out which device to use.

ffmpeg -f avfoundation -list_devices true -i ""

Ouput will look like:

Open Port 80 Oracle Cloud Compute Instance (CentOS)

FYI This was harder than it needed to be:

Looking at your instance info, find VNIC section, click "Public Subnet".
Click on your security list.
Add a new entry with the following options:

"Stateless" = No, "Source" = 0.0.0.0/0, "IP Protocol" = TCP, "Source Port Range" = All, "Destination Port Range" = 80

SSH to your instance.
While SSH'ed in your instance, run command firewall-cmd --permanent --add-service=http.
While SSH'ed in your instance, run command firewall-cmd --reload.
Now start Apache, NGINX, or whatever server you need to on port 80. You can now access from the internet.

Here are the steps needed to convert an image (like JPG or TIF) to MBTiles using GDAL:

Download and install GDAL (https://gdal.org/, https://anaconda.org/conda-forge/gdal):
```
   conda install -c conda-forge gdal
```
Installing GDAL is kind of a pain in the ass, especially on Windows. I'm assuming you'll be able to work out whatever issues you run into here.
Download example jpg and tif map images we can work with:
- http://www.radcyberzine.com/xglobe/index.html#maps - See Super-hi-res maps section, download one of the jpg files.

Here are the steps needed to run a self hosted Open Street Map server (using Docker):

Download desired pbf files (like south-carolina-latest.osm.pbf) from https://download.geofabrik.de or just use the following empty planet below:


  <?xml version='1.0' encoding='UTF-8'?>
  <osm version="0.6" generator="osmconvert 0.8.8" timestamp="2019-10-23T20:18:02Z">
    <bounds minlat="42.4276" minlon="1.412368" maxlat="42.65717" maxlon="1.787481"/>
  </osm>

	[
	{
	"type": "multiple",
	"difficulty": "medium",
	"category": "Entertainment: Video Games",
	"question": "What is the world's first video game console?",
	"correct_answer": "Magnavox Odyssey",
	"incorrect_answers": [
	"Coleco Telstar",

	# Increase display brightness command
	osascript -e 'tell application "System Events"' -e 'key code 144' -e ' end tell'
	# Decrease display brightness command
	osascript -e 'tell application "System Events"' -e 'key code 145' -e ' end tell'

	# zsh solution to turn it all the way up on one command, just run `b` on the cmd line
	alias bright="osascript -e 'tell application \"System Events\"' -e 'key code 144' -e ' end tell'"
	alias b="repeat 10 { bright }"

	import requests
	import json
	import time

	if __name__ == '__main__':
	db = {}
	token = requests.get('https://opentdb.com/api_token.php?command=request').json()['token']
	while True:
	r = requests.get(f'https://opentdb.com/api.php?amount=50&token={token}')
	r_json = r.json()

	{
	"1": "2021-06-20",
	"2": "2021-06-21",
	"3": "2021-06-22",
	"4": "2021-06-23",
	"5": "2021-06-24",
	"6": "2021-06-25",
	"7": "2021-06-26",
	"8": "2021-06-27",
	"9": "2021-06-28",

	# How to fix: "chromedriver" can’t be opened because Apple cannot check it for malicious software.
	xattr -d com.apple.quarantine /opt/homebrew/bin/chromedriver