gpg - c creates, gpg - d decodes
this uses python qrcode (pip install it if you dont have it)
read -p "Input GPG file: " infile; read -p "Output PNG file: " outfile; python3 -c "import qrcode, base64; f=open('$infile','rb'); data=base64.b64encode(f.read()).decode(); f.close(); qrcode.make(data).save('$outfile')"
this passes the input of the qr as input and decodes the gpg (requires pyzbar. opencv is good to have also
read -p "QR PNG file: " qrfile; read -p "Output file: " outfile; python3 -c "import cv2, pyzbar.pyzbar as pyzbar, base64, sys; img=cv2.imread('$qrfile'); data=pyzbar.decode(img)[0].data; sys.stdout.buffer.write(base64.b64decode(data))" | gpg -d > "$outfile"
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