# install globally to use on the command-line
npm install -g pptx2pdf

# install locally to use a library
npm install --save pptx2pdf

sudo apt install libreoffice
sudo apt install imagemagick
sudo apt install ghostscript # was NOT required

brew cask install libreoffice
brew install imagemagick
brew install ghostscript # WAS required

$ pptx2png --help

pptx2png [options] [input-file]

Options:
  --input, -i            input file
  --output-dir, -o       where your file will be placed           [default: "."]
  --filename, -f         override output filename
  --libreoffice-bin, -l  override the libreoffice path
  --png, -p              output png instead           [boolean] [default: false]
  --remove-pdf, -r       delete pdf file when outputting png
                                                      [boolean] [default: false]
  --help                 Show help                                     [boolean]
  --version              Show version number                           [boolean]
 
# convert to pdf 
pptx2pdf input.pptx

# convert to png 
pptx2pdf input.pptx --png

# convert pdf to png
pptx2pdf input.pdf

libreoffice --headless \
--invisible \
--convert-to pdf \
--outdir <outputDir> \
inputPath