Parses the datetime from exported Telegram photos and reinserts them as EXIF recording date.

tg2exif.sh

#!/bin/bash

folder=$(realpath $1)

if [[ ! -d $folder ]]; then
  echo "No valid folder."
  exit 1
fi

# Delete Thumbnails
find $folder -name "*_thumb*" -delete

for filepath in $folder/*.jpg; do
  filename=$(basename $filepath)
  time=$(echo $filename | sed -E 's/photo_[0-9]+@([0-9]+)-([0-9]+)-([0-9]+)_([0-9]+)-([0-9]+)-([0-9]+).jpg/\3:\2:\1 \4:\5:\6/')
  echo $filename = $time
  exiftool -overwrite_original "-DateTimeOriginal=$time" $filepath
done