PYPDF2，如何压缩 output PDF

Question

i am highlighting text using this code: https://gist.github.com/agentcooper/4c55133f5d95866acdee5017cd318558

from PyPDF2 import PdfFileWriter, PdfFileReader

from PyPDF2Highlight import createHighlight, addHighlightToPage

pdfInput = PdfFileReader(open("input.pdf", "rb"))
pdfOutput = PdfFileWriter()

page1 = pdfInput.getPage(0)
page1.compressContentStreams() # ADDED BY MYSELF
highlight = createHighlight(100, 400, 400, 500, {
    "author": "",
    "contents": "Bla-bla-bla"
})

addHighlightToPage(highlight, page1, pdfOutput)

pdfOutput.addPage(page1)

outputStream = open("output.pdf", "wb")
pdfOutput.write(outputStream)

problem is connected with too large output PDF that i am receiving, I have added compressContentStreams() but still doesn't work, input file: 10MB, output 3 GB !

Answer 1

Not all PDF software is capable of compressing PDFs, when I search their documentation I find no other matches for what could optimize files besides compressContentStreams ().

You'll probably need to consider alternative PDF software if you need either better results initially or the ability to compress PDF files. My company offers PDF Optimizer to help in situations like this.