Canon CR2 RAW File to HEIC Conversion

cr2toheic.sh

#!/bin/bash

: '
Description: Canon CR2 to HEIC Converter

This Bash script automates the process of converting Canon CR2 raw image files to High-Efficiency Image Format (HEIC) files with a 16-bit color depth. The conversion is achieved using `dcraw` for raw file processing, preserving the intricate details captured by Canon cameras. Additionally, `exiftool` is employed to extract and retain Exif metadata, ensuring valuable information about the images is maintained.

Features:
- Converts Canon CR2 raw files to HEIC format.
- Utilizes `dcraw` for high-quality raw file conversion.
- Preserves 16-bit color depth for enhanced image fidelity.
- Extracts and retains Exif metadata with the use of `exiftool`.
- Streamlines the process for batch conversion.

Usage:
1. Place your Canon CR2 raw files in the designated input directory (\$1).
2. Run the script, providing the input directory as the first argument:
'

# check if argument 1 is a folder
if [ ! -d "$1" ]; then
    echo "Folder does not exist: $folder"
    exit 1
fi

# Create output directory if not exists
output_dir="$1/output_heic"
mkdir -p "$output_dir"

time {
    # Convert raw files to jpeg using dcraw and ImageMagick
    for raw_file in $1/*.CR2; do
        base_name=$(basename "$raw_file" .CR2)
        heic_file="$output_dir/${base_name}.heic"

        if [ -e "$heic_file" ]; then
            echo "Skipping conversion of $heic_file, file already exists."
            continue
        fi
        
        # create 16bit heic image from raw file
        dcraw -6 -m 2 -q 3 -o 1 -c -w "$raw_file" | convert -quiet -depth 16 -quality 60 - "$heic_file"
        exiftool -q -overwrite_original -tagsfromfile "$1"/"$raw_file" -all:all "$heic_file"

        echo "Converted: $raw_file to $heic_file"
    done
}