Compress PDF file

[Mano2731995]

Hai jorj

For example I am having more than 500MB pdf file. How to compress that file in fitz?

[JorjMcKie]

The standard approach is using garbage collection and deflation.
You can do this with MuPDF's CLI utility mutool clean -ggggz input.pdf output.pdf.
Option z means deflation, the multiple "g" option corresponds to maximum garbage collection, argument garbage=4 in PyMuPDF - fully specified doc.save("output.pdf", garbage=4, deflate=True).

This will not change the PDF's appearance in any way.

Depending on your willingness to bargain appearance for size, more things can be done with PyMuPDF - and some might have a very significant effect:

• removal of embedded files
• subsetting of fonts if applicable
• replacing images by a smaller (and maybe lower quality) version, including color to grayscale, PNG to JPG, ...
• removal of images
• removal of page thumbnails if applicable
• ...

If any of the above finds your interest, we should discuss.

[Mano2731995]

Thanks for valuable reply jorj if required above query I will let u know.

I need one help jorj I have attached file by using page.addfileannot.Fyr I have attached image. In that attachment having small size yellow comment symbol(red color circle) I need to ignore that yellow color comment symbol

[JorjMcKie]

The attached link does not work.

[Mano2731995]

[JorjMcKie]

Hard to be sure what that is, because every viewer does these things differently.
But it looks like a PopUp annotation. They automatically get created if a "normal" annotation is clicked.
There exists method Annot.delete_responses() which removes PopUp annotations and other responses to the annotation.

[Mano2731995]

Hard to be sure what that is, because every viewer does these things differently.
But it looks like a PopUp annotation. They automatically get created if a "normal" annotation is clicked.
There exists method Annot.delete_responses() which removes PopUp annotations and other responses to the annotation.

Superb jorj it's working as expected thank you

[JorjMcKie]

Yes, you need the image xref. You also must provide the new image of course. If you want a JPG version of the existing image, you must make it: there is no automatism for this in PyMuPDF - and in fact, why should there be such a thing? You can extract the current image, make a pixmap from it, then use `pix.tobytes("jpg")` and reinsert this output to replace the current image.

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