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Convert a pdf in a 2x2 layout of PNGs
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| # Slides => PNGs | |
| pdftoppm -png -r 300 main.pdf slide | |
| # PNGs => slides | |
| img2pdf slide-*.png -o new.pdf | |
| # PDF => 2x2 PDF | |
| pdfjam new.pdf --nup 2x2 --landscape --outfile new-2x2.pdf | |
| # Compress if file too big | |
| gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=new-2x2-compressed.pdf new-2x2.pdf | |
| # Clean temp files | |
| rm slide-*.png | |
| rm new.pdf |
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