batch_recompress.sh

#!/bin/bash

# Define source and output directories
SOURCE_DIR="$(pwd)"
OUTPUT_DIR="$SOURCE_DIR/recompressed"

# Create the output directory if it doesn't exist
mkdir -p "$OUTPUT_DIR"

echo "Starting batch processing..."

# Determine the ImageMagick command (newer versions use 'magick', older use 'convert')
IMAGEMAGICK_CMD=""
if command -v magick >/dev/null 2>&1; then
    IMAGEMAGICK_CMD="magick"
elif command -v convert >/dev/null 2>&1; then
    IMAGEMAGICK_CMD="convert"
else
    echo "❌ Error: ImageMagick is not installed. Please install it (e.g., sudo dnf install ImageMagick)."
    exit 1
fi

# Loop through all files in the source directory
for file in "$SOURCE_DIR"/*; do
  # Skip directories and the script itself
  if [ -d "$file" ]; then
    continue
  fi

  # Extract filename and lowercase extension for matching
  filename=$(basename "$file")

  # Skip if the file has already been successfully processed
  if [ -s "$OUTPUT_DIR/$filename" ]; then
    echo "⏭️  Skipping already processed file: $filename"
    continue
  fi
  extension="${filename##*.}"
  extension_lower=$(echo "$extension" | tr '[:upper:]' '[:lower:]')

  # Check if the file is a video
  if [[ "$extension_lower" =~ ^(mp4|mov|mkv|avi|webm)$ ]]; then
    echo "🎬 Re-encoding video: $filename"
    ffmpeg -hide_banner -loglevel error -y -hwaccel vaapi -hwaccel_output_format vaapi -i "$file" -vf "hwupload,format=vaapi" -c:v hevc_vaapi -global_quality 40 -c:a copy "$OUTPUT_DIR/$filename"
      
  # Check if the file is an image (excluding GIF as it can break animations)
  elif [[ "$extension_lower" =~ ^(jpg|jpeg|png|webp)$ ]]; then
    echo "🖼️  Compressing photo: $filename"
    # '-quality 82' offers excellent visual quality with much smaller file sizes
    "$IMAGEMAGICK_CMD" "$file" -quality 82 "$OUTPUT_DIR/$filename"

  # Keep GIFs intact
  elif [[ "$extension_lower" == "gif" ]]; then
    echo "🖼️  Copying animated GIF (uncompressed): $filename"
    cp "$file" "$OUTPUT_DIR/$filename"
  
  else
    echo "⚠️  Skipping unknown file type or script: $filename"
  fi
done

echo "✅ Batch processing complete! Your files are in the 'recompressed' folder."