PDF size increases with multiple orders of magnitute (ex from 182K to 20,7Mb)

buda-base / pecha-printer

Turn images and pdfs into ready to print pecha print-masters

https://buda-base.github.io/pecha-printer/

Apache License 2.0

4 stars 2 forks source link

PDF size increases with multiple orders of magnitute (ex from 182K to 20,7Mb) #9

Open peterolin opened 3 years ago

peterolin commented 3 years ago

I attach sample of original file and converted result. The size increase makes the result quite unwieldy, and it doesn't seem easy to compress it. (On local networks with attached printers etc, having some huge temporary files is probably no issue, but when mailing the result to print shops in Asia it becomes an issue. And this sample only has 72 original pages).

Whether this is unavoidable or not, I don't know.

Thanks for your work on this great and convenenient tool.

mkhas 'jug sa bcad pe cha PO.pdf mkhas 'jug sa bcad pe cha PO_A4.pdf

eroux commented 3 years ago

That's an interesting side effect:

your original file is typical of a PDF produced by a word processor: the text is encoded as text and the fonts are embedded
in the output PDF, each glyph is drawn (based on the text + font of the original, so nothing is lost), which makes it considerably larger (and also the text information is kind of lost, which is probably not a big deal)

I think the primary target was PDF with images, but this use case could probably be handled better... perhaps some options in the writing of the PDFs?

peterolin commented 3 years ago

Thanks! I was just writing a clarification of that, but you beat me to it. :D I can see that with the original intent being to print scanned files, it would be a non-issue. But it would be great with a switch/option for text encoded PDFs.