convert-to-jpg

#!/bin/bash
# =============================================================================
# Linux Bash script: Convert all image files (including DNG and other RAWs)
# in a directory to 100% quality JPGs with the SAME base filename.
#
# Examples:
#   photo.dng   → photo.jpg
#   image.png   → image.jpg
#   picture.JPG → picture.jpg (re-encoded at 100% quality)
#
# Usage:
#   ./convert-to-jpg.sh              # current directory
#   ./convert-to-jpg.sh /path/to/dir # specific directory
#
# Requirements:
#   ImageMagick (convert or magick command)
#   sudo apt install imagemagick      # Debian/Ubuntu
#   sudo dnf install ImageMagick      # Fedora
#   For DNG/RAW support: most distros include libraw automatically.
# =============================================================================

set -euo pipefail

# Directory to process (default = current directory)
DIR="${1:-.}"

if [ ! -d "$DIR" ]; then
  echo "❌ Error: Directory '$DIR' does not exist." >&2
  exit 1
fi

echo "🔄 Converting images to 100% quality JPGs in: $DIR"
echo "   (original files are kept, new .jpg files are created/overwritten)"

# Use 'magick' if available (ImageMagick 7+), otherwise fall back to 'convert'
if command -v magick >/dev/null 2>&1; then
  CONVERT_CMD="magick"
else
  CONVERT_CMD="convert"
fi

# Process all common image files (case-insensitive)
# Add more extensions if you need them (e.g. *.heif *.avif)
find "$DIR" -maxdepth 1 -type f \( \
  -iname "*.jpg" -o -iname "*.jpeg" -o \
  -iname "*.png" -o \
  -iname "*.tif" -o -iname "*.tiff" -o \
  -iname "*.gif" -o \
  -iname "*.bmp" -o \
  -iname "*.webp" -o \
  -iname "*.heic" -o \
  -iname "*.dng" -o \
  -iname "*.cr2" -o -iname "*.cr3" -o \
  -iname "*.nef" -o -iname "*.arw" -o \
  -iname "*.rw2" -o -iname "*.orf" -o -iname "*.raf" \
\) | while read -r file; do
  # Extract base name without extension
  base="${file%.*}"
  output="${base}.jpg"

  echo "   📸 Converting: $(basename "$file") → $(basename "$output")"

  # Convert with 100% quality (JPEG quality scale)
  "$CONVERT_CMD" "$file" -quality 100 "$output"

  if [ $? -eq 0 ]; then
    echo "   ✅ Done: $(basename "$output")"
  else
    echo "   ❌ Failed: $(basename "$file")" >&2
  fi
done

echo "🎉 Conversion complete! All images are now high-quality JPGs."
echo "   Tip: Run 'ls *.jpg' to see the results."