[poppler] A way to count the number of transparent objects

[Alex Korobkin]

Hi all,

I have a web page that generates tons of transparent objects in the print
preview PDF. pdftocairo would grab 400% of RAM when trying to convert it to
PostScript and die from the hands of OOM killer. Printer itself would just
choke on the PDF if I send it directly.

I wonder if there is a command-line way to count the number of transparent
objects? This will allow me to catch them in the pipeline and process them
differently.

Ideally, maybe there is also a way to flatten the PDF somehow, merging
those objects?

I couldn't find anything in the poppler utils docs, hoping someone has any
suggestions. Thanks.
-- 
Alex
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