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#!/usr/bin/env python3
# vim:tabstop=4 softtabstop=4 shiftwidth=4 textwidth=160 smarttab expandtab colorcolumn=160
#
# Copyright (C) 2025 Birte Kristina Friesel
#
# SPDX-License-Identifier: BSD-2-Clause
from datetime import datetime, timedelta
import argparse
import json
import subprocess
import sys
if __name__ == "__main__":
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter, description=__doc__
)
parser.add_argument("delta", type=int, help="Time delta [minutes]")
parser.add_argument("images", type=str, nargs="+")
args = parser.parse_args()
delta = timedelta(minutes=args.delta)
for filename in args.images:
data = dict()
try:
exiftool = subprocess.run(
[
"exiftool",
"-json",
"-d",
"%s",
"-escapeHTML",
"-groupNames",
filename,
],
stdout=subprocess.PIPE,
text=True,
)
if exiftool.returncode == 0:
data = json.loads(exiftool.stdout)[0]
except FileNotFoundError:
pass
old_timestamp = datetime.fromtimestamp(int(data["EXIF:DateTimeOriginal"]))
new_timestamp = old_timestamp + delta
print(f"{filename} : {old_timestamp} → {new_timestamp}")
exiftool_cmd = [
"exiftool",
"-P",
"-EXIF:DateTimeOriginal=" + str(new_timestamp),
filename,
]
try:
subprocess.run(
exiftool_cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True,
)
except subprocess.CalledProcessError as e:
print(
f"Cannot to write exif tags for {filename}: {exiftool_cmd} returned {e.returncode}"
)
print(f"exiftool stdout:\n{e.stdout}\n")
print(f"exiftool stderr:\n{e.stdout}\n")
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