split-pdf

#!/bin/bash

# Input PDF file path (first argument)
input_pdf="$1"

# Output directory for split PDFs (second argument)
output_dir="$2"

# Number of pages per output PDF (third argument)
pages_per_pdf="$3"

# Check if all arguments are provided
if [ $# -ne 3 ]; then
    echo "Usage: $0 <input_pdf> <output_dir> <pages_per_pdf>"
    exit 1
fi

# Ensure output directory exists, create it if not
mkdir -p "$output_dir"

# Count total pages in input PDF
total_pages=$(pdftk "$input_pdf" dump_data | grep NumberOfPages | awk '{print $2}')

# Calculate number of output PDFs needed
num_output_pdfs=$(( ($total_pages + $pages_per_pdf - 1) / $pages_per_pdf ))

# Split PDF into multiple PDFs
for (( i=1; i<=$num_output_pdfs; i++ )); do
    start_page=$(( ($i - 1) * $pages_per_pdf + 1 ))
    end_page=$(( $i * $pages_per_pdf ))
    if [ $end_page -gt $total_pages ]; then
        end_page=$total_pages
    fi
    output_pdf="${output_dir}/$(basename "$input_pdf" .pdf)-part${i}.pdf"
    pdftk "$input_pdf" cat $start_page-$end_page output "$output_pdf"
    echo "Created: $output_pdf"
done