Creates a single PDF booklet from multiple scanned images in a folder structure like this:
input_dir/
01 - Front cover/
01 - Front cover outside.png
02 - Front cover inside.png
02 - Booklet/
01 - Booklet front.png
02 - Booklet 1-2.png
03 - Booklet 3-4.png
04 - Booklet 5-6.png
05 - Booklet back.png
03 - CD/
01 - CD front.png
02 - CD back.png
04 - Back cover/
01 - Back cover inside.png
02 - Back cover outside.png
The resulting PDF will contain the folder- and filenames as bookmark titles (without the file extension and leading numerals).
makepdf input_dir