batch-cjxl

#!/bin/bash

# Define the file extensions to search for
EXTENSIONS=(jpg jpeg JPG JPEG)

# Set the options for cjxl (e.g., -d 0 for lossless)
# Check 'cjxl --help' for other options
CJXL_OPTIONS="-d 0" 

echo "Starting JPEG to JXL conversion..."

# Loop through all defined extensions
for ext in "${EXTENSIONS[@]}"; do
    # Find files with the current extension
    for file in *."${ext}"; do
        # Check if the file exists (handles the case where no files match the glob)
        if [[ -f "${file}" ]]; then
            
            # Construct the output filename (.jxl)
            output_file="${file%.*}.jxl"
            
            echo "Converting ${file} to ${output_file}..."
            
            # Run the cjxl command
            # The '$CJXL_OPTIONS' variable is used for any desired settings
            if cjxl --lossless_jpeg=1 "${file}" "${output_file}" $CJXL_OPTIONS; then
                # If conversion is successful, remove the original file
                echo "Conversion successful. Removing original ${file}."
                rm "${file}"
            else
                echo "ERROR: cjxl failed for ${file}. Keeping original file."
            fi
        fi
    done
done

echo "Conversion complete."