Greenshot: Decode QR code from the screenshot

README.md

How?

1. Install Python 3 (I use 3.10)
2. Run the following command (to install dependencies)

python3 -m pip install --upgrade pyzbar Pillow pyperclip

3. Copy main.py to C:\qrcode-decode (Or whereever, just being able to run from command line)
4. On Greenshot's icon located in the taskbar, right click and click "Configure external commands"
5. On "External command settings" window, click "New" button.

6. On "Configure command" window, fill up the following values:

• Name: Decode QR
• Command: C:\Python310\python.exe (Or anywhere that Python executable file locaated)
• Argument: C:\qrcode-decode\main.py "{0}"

then click "Ok"

When you take a screenshot and choose "Decode QR", if the script can detect QR code, it'll copy the value (URL, number, text, etc.) from the first QR code to your clipboard.

main.py

#!/usr/bin/env python

"""main.py: Decode QR code and copy its result to user's clipboard. Derived from https://stackoverflow.com/a/49609996 and https://stackoverflow.com/a/11063483"""

__author__      = "ITPCC <dev@rachasak.org>"
__copyright__   = "MIT"

import sys

from pyzbar.pyzbar import decode
from PIL import Image
import pyperclip

decRes = decode(Image.open(sys.argv[1]))

if decRes:
    pyperclip.copy(decRes[0].data.decode("utf-8"))