add_exif_from_filename.py

#!/usr/bin/python3
"""
Add exif data using the exiftool CLI tool based on datetime in the filename
Expected format: YYYYMMDD_hhmmss e.g. 20230521_222735
"""

from pathlib import Path
import os
import re
import subprocess
import sys

pattern = re.compile(r'\d{8}_\d{6}')

rootdir = Path(sys.argv[1])
for file in rootdir.iterdir():
    if file.is_file():
        date_match = re.search(pattern, str(file))
        dt = date_match.group(0)
        dt = f'{dt[:4]}:{dt[4:6]}:{dt[6:8]} {dt[9:11]}:{dt[11:13]}:{dt[13:15]}'
        command = f'exiftool -modifydate="{dt}" -createdate="{dt}" {file}'
        print(command)
        subprocess.run(command, shell=True, stdout=subprocess.PIPE)