mirror of
https://github.com/Theodor-Springmann-Stiftung/kgpz_web.git
synced 2025-10-29 09:05:30 +00:00
+Compressed IMG files
This commit is contained in:
Simon Martens
147
scripts/generate_webp_originals.sh
Executable file
147
scripts/generate_webp_originals.sh
Executable file
@@ -0,0 +1,147 @@
|
||||
#!/bin/bash
|
||||
|
||||
# Script to generate high-quality WebP versions of original JPEG files
|
||||
# These will be used for the single page viewer (enlarged view)
|
||||
# Usage: ./scripts/generate_webp_originals.sh
|
||||
|
||||
# Colors for output
|
||||
RED='\033[0;31m'
|
||||
GREEN='\033[0;32m'
|
||||
YELLOW='\033[1;33m'
|
||||
BLUE='\033[0;34m'
|
||||
NC='\033[0m' # No Color
|
||||
|
||||
# Configuration
|
||||
QUALITY=95 # WebP quality (0-100) - very high for single page viewer
|
||||
COMPRESSION=1 # WebP compression level (0-6, lower = less compression, higher quality)
|
||||
PICTURES_DIR="pictures"
|
||||
|
||||
# Check if cwebp is installed
|
||||
if ! command -v cwebp &> /dev/null; then
|
||||
echo -e "${RED}Error: cwebp is not installed. Please install WebP tools:${NC}"
|
||||
echo " Ubuntu/Debian: sudo apt-get install webp"
|
||||
echo " macOS: brew install webp"
|
||||
echo " CentOS/RHEL: sudo yum install libwebp-tools"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Check if pictures directory exists
|
||||
if [ ! -d "$PICTURES_DIR" ]; then
|
||||
echo -e "${RED}Error: Pictures directory '$PICTURES_DIR' not found${NC}"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
echo -e "${BLUE}Generating high-quality WebP originals for single page viewer...${NC}"
|
||||
echo "Quality: $QUALITY% (near-lossless)"
|
||||
echo "Compression: $COMPRESSION (minimal compression for maximum quality)"
|
||||
echo ""
|
||||
|
||||
# Counters
|
||||
processed=0
|
||||
skipped=0
|
||||
errors=0
|
||||
|
||||
# Function to process a single file
|
||||
process_file() {
|
||||
local jpg_file="$1"
|
||||
|
||||
# Skip if already a preview file
|
||||
if [[ "$jpg_file" =~ -preview\.(jpg|jpeg)$ ]]; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
# Generate output filename
|
||||
dir=$(dirname "$jpg_file")
|
||||
filename=$(basename "$jpg_file")
|
||||
name_no_ext="${filename%.*}"
|
||||
webp_file="$dir/${name_no_ext}.webp"
|
||||
|
||||
# Skip if WebP original already exists and is newer than source
|
||||
if [ -f "$webp_file" ] && [ "$webp_file" -nt "$jpg_file" ]; then
|
||||
echo -e "${YELLOW}Skipping $jpg_file (WebP exists and is newer)${NC}"
|
||||
return 0
|
||||
fi
|
||||
|
||||
# Convert to high-quality WebP
|
||||
echo "Processing: $jpg_file -> $webp_file"
|
||||
|
||||
if cwebp -q "$QUALITY" -m "$COMPRESSION" -alpha_cleanup "$jpg_file" -o "$webp_file" 2>/dev/null; then
|
||||
# Check file sizes
|
||||
jpg_size=$(stat -f%z "$jpg_file" 2>/dev/null || stat -c%s "$jpg_file" 2>/dev/null)
|
||||
webp_size=$(stat -f%z "$webp_file" 2>/dev/null || stat -c%s "$webp_file" 2>/dev/null)
|
||||
|
||||
if [ -n "$jpg_size" ] && [ -n "$webp_size" ]; then
|
||||
if [ "$webp_size" -lt "$jpg_size" ]; then
|
||||
reduction=$(( (jpg_size - webp_size) * 100 / jpg_size ))
|
||||
echo -e "${GREEN} ✓ Success! Size reduction: ${reduction}%${NC}"
|
||||
else
|
||||
increase=$(( (webp_size - jpg_size) * 100 / jpg_size ))
|
||||
echo -e "${GREEN} ✓ Success! Size increase: ${increase}% (expected for high quality)${NC}"
|
||||
fi
|
||||
else
|
||||
echo -e "${GREEN} ✓ Success!${NC}"
|
||||
fi
|
||||
return 0
|
||||
else
|
||||
echo -e "${RED} ✗ Failed to convert $jpg_file${NC}"
|
||||
return 1
|
||||
fi
|
||||
}
|
||||
|
||||
# Export the function and variables for parallel execution
|
||||
export -f process_file
|
||||
export QUALITY COMPRESSION GREEN RED YELLOW BLUE NC
|
||||
|
||||
# Detect number of CPU cores for parallel processing
|
||||
CPU_CORES=$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)
|
||||
PARALLEL_JOBS=$((CPU_CORES))
|
||||
|
||||
echo "Using $PARALLEL_JOBS parallel jobs (detected $CPU_CORES CPU cores)"
|
||||
echo ""
|
||||
|
||||
# Find all JPG files and process them in parallel
|
||||
find "$PICTURES_DIR" -type f \( -name "*.jpg" -o -name "*.jpeg" \) | \
|
||||
grep -v -E '\-preview\.(jpg|jpeg)$' | \
|
||||
xargs -n 1 -P "$PARALLEL_JOBS" -I {} bash -c 'process_file "$@"' _ {}
|
||||
|
||||
# Wait for all background processes to complete
|
||||
wait
|
||||
|
||||
# Count actual results
|
||||
total_files=$(find "$PICTURES_DIR" -type f \( -name "*.jpg" -o -name "*.jpeg" \) | grep -v -E '\-preview\.(jpg|jpeg)$' | wc -l)
|
||||
webp_files=$(find "$PICTURES_DIR" -type f -name "*.webp" ! -name "*-preview.webp" | wc -l)
|
||||
processed=$webp_files
|
||||
skipped=0
|
||||
errors=$((total_files - processed))
|
||||
|
||||
# Final summary
|
||||
echo ""
|
||||
echo -e "${BLUE}=== Summary ===${NC}"
|
||||
echo "Processed: $processed files"
|
||||
echo "Skipped: $skipped files"
|
||||
echo "Errors: $errors files"
|
||||
|
||||
if [ $errors -eq 0 ]; then
|
||||
echo -e "${GREEN}All conversions completed successfully!${NC}"
|
||||
else
|
||||
echo -e "${YELLOW}Completed with $errors errors${NC}"
|
||||
fi
|
||||
|
||||
# Information about file structure
|
||||
echo ""
|
||||
echo -e "${BLUE}=== File Structure ===${NC}"
|
||||
echo "After running this script, you'll have:"
|
||||
echo " original.jpg -> Original JPEG file (fallback)"
|
||||
echo " original.webp -> High-quality WebP (single page viewer)"
|
||||
echo " original-preview.webp -> Compressed WebP (layout views)"
|
||||
echo ""
|
||||
echo "The backend will prefer .webp files for the single page viewer,"
|
||||
echo "falling back to .jpg if WebP is not available."
|
||||
|
||||
# Calculate total space impact (optional)
|
||||
echo ""
|
||||
echo -e "${BLUE}=== Space Analysis ===${NC}"
|
||||
echo "To analyze space usage:"
|
||||
echo " Original JPEGs: find $PICTURES_DIR -name '*.jpg' -exec du -ch {} + | tail -1"
|
||||
echo " WebP originals: find $PICTURES_DIR -name '*.webp' ! -name '*-preview.webp' -exec du -ch {} + | tail -1"
|
||||
echo " WebP previews: find $PICTURES_DIR -name '*-preview.webp' -exec du -ch {} + | tail -1"
|
||||
Reference in New Issue
Block a user