Sometimes pdf presentations rely on specific fonts, etc which may be unavailable on some computers.
Sometimes, a given pdf is very slow to show up on certain computers.
A solution can be to convert everything to bitmaps. This increases file size but makes rendering straightforward. With a trick that keeps the png format on the resulting pdf, the results are as crisp as in the original
#!/bin/bash
# Convert PDF file to individual pdf files with given resolution (96 DPI)
# without losing definition.
NPAGES=$(pdfinfo $1 | grep Pages | awk '{print $2}')
echo $NPAGES
for i in $(seq $NPAGES); do
echo Processing page $i
echo Generating "__FILE$i".pdf
pdftk A=$1 cat "A$i" output - | convert -density 96 - png:- | img2pdf -o "__FILE$i".pdf -
# ^ ^ ^ ^
# | | | lossless conversion to pdf
# | | specify PNG
# | convert to png
# extract page
done
# The last part comes from
# https://unix.stackexchange.com/questions/42856/how-can-i-convert-a-png-to-a-pdf-in-high-quality-so-its-not-blurry-or-fuzzy
