Renames photo files that have the wrong extension

rename.sh

#!/bin/bash

# credit to u/nkings10's post on Reddit which was the template for this: https://www.reddit.com/r/photoprism/comments/1ev7zxm/import_errors/

# Directory containing images
IMAGE_DIR="/path/to/your/images"


# Find all files recursively and process each one
find "$IMAGE_DIR" -type f | while read -r file; do
    # Detect the MIME type using `file`
    mime_type=$(file --mime-type -b "$file")
    
    # Determine the correct extension based on MIME type
    case "$mime_type" in
        image/jpeg)
            new_ext="jpg"
            ;;
        image/png)
            new_ext="png"
            ;;
        image/gif)
            new_ext="gif"
            ;;
        image/bmp)
            new_ext="bmp"
            ;;
        image/tiff)
            new_ext="tiff"
            ;;
        image/heic)
            new_ext="heic"
            ;;
        *)
            echo "Skipping $file, unrecognized MIME type: $mime_type"
            continue
            ;;
    esac
    if [ "${file##*.}" = $new_ext ]; then
        echo "Skipping $file, already has correct extension: $new_ext"
        continue
    fi
    # Extract the filename without the extension
    base_name=$(basename "$file" | sed -e 's/\.[a-zA-Z0-9]*$//')


    # Get the directory of the file
    dir_name=$(dirname "$file")


    # Rename the file
    mv "$file" "$dir_name/$base_name.$new_ext"


    echo "Renamed $file to $dir_name/$base_name.$new_ext"
done