Commands to convert multi-page PDF to/from multiple PNG files with GhostScript & ImageMagick

pdf_conversions.md

• Convert multipage PDF into single page PNG files with GhostScript

http://superuser.com/questions/350201/convert-many-images-to-one-pdf-on-mac/854606?noredirect=1#comment1639104_854606

gs -o /path/to/output_page_%03d.png -sDEVICE=png16m -r150 /path/to/input.pdf

• Convert multiple single-page PDF files into one multi-page PDF file

FILES="$(find /path/to/dir/ -type f -name "*.pdf" | sort)"
gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=merged_output.pdf $FILES

• Convert multiple PNG files into single multi-page PDF with ImageMagick

http://stackoverflow.com/questions/11002982/converting-multi-page-pdfs-to-several-jpgs-using-imagemagick-and-or-ghostscript?rq=1

convert "*.png" output.pdf

Tested with OS X 10.11 El Capitan, commands should work on most any OS that can run these programs