This script renames ( << suggests new filenames) Nikon NEF (RAW) files based on shutter count and date & time information the photos were taken

rename-basedOn-ShutterCount-DateTimeOriginal.sh

#!/bin/bash

# This script renames Nikon NEF (RAW) files based on shutter count (EXIF "Shutter Count")
# and date & time information the photos were taken (EXIF "DateTimeOriginal")
# Dependency: exiftool must be installed
# by Andras Kora, ak@akora.info, 2018-09-30 Sun 18:21:19 CEST @723

for file in *.nef ; do
  echo -n "Processing $file >> "
  exif_shutter_count_info=$(exiftool -ShutterCount -s -s -s "$file")
  formatted_shutter_count=$(printf "%08d" $exif_shutter_count_info)
  
  exif_date_time_original_info=$(exiftool -DateTimeOriginal -s -s -s "$file")
  date_time_array_split=($exif_date_time_original_info)
  formatted_date_original=${date_time_array_split[0]//:/}
  formatted_time_original=${date_time_array_split[1]//:/}
  formatted_target_filename="$formatted_shutter_count-$formatted_date_original-$formatted_time_original.nef"
  
  echo "Suggested new filename: $formatted_target_filename"
done