Pymupdf: Inserted image flipped horizontally

[axlgit]

In a series of PDFs the code here below puts the inserted image in the expected position in many of them but in some the image is mirrored related to the horizontal ax of the page.

import fitz

in1_pdf="in1.pdf"
out1_pdf="out1.pdf"
in2_pdf="in2.pdf"
out2_pdf="out2.pdf"

image="arrow.png"
doc1=fitz.open(in1_pdf)
doc2=fitz.open(in2_pdf)
tlx_perc=0.5
tly_perc=0.9
brx_perc=0.85
bry_perc=0.95

for in_page in doc1:
    img_rectangle = fitz.Rect(
            in_page.rect.width * tlx_perc,
            in_page.rect.height * tly_perc,
            in_page.rect.width * brx_perc,
            in_page.rect.height * bry_perc,
            )

    in_page.insertImage(img_rectangle, filename=image)

for in_page in doc2:
    img_rectangle = fitz.Rect(
            in_page.rect.width * tlx_perc,
            in_page.rect.height * tly_perc,
            in_page.rect.width * brx_perc,
            in_page.rect.height * bry_perc,
            )

    in_page.insertImage(img_rectangle, filename=image)

doc1.save(out1_pdf, deflate=True)
doc2.save(out2_pdf, deflate=True)

out1.pdf is the expected result, out2.pdf is the output with the image flipped horizontally.

^^^^^ out1.pdf ^^^^^

^^^^^ out2.pdf ^^^^^

What can I check in terms of properties of PDF source to find maybe a difference that may explain the different output?

TIA,

Alex

[JorjMcKie]

This problem is explained in the documentation - including how to resolve it: https://pymupdf.readthedocs.io/en/latest/faq/#misplaced-item-insertions-on-pdf-pages.

You should take the time to read the docs - at least the tutorial and the recipes chapter.

[axlgit]

Thanks, when you are in a hurry you may be obliged to learn by trial and error.
Many thanks for your time in replying, I will definitely go through the docs :-)

Alex

[JorjMcKie]

I understand ... and I didn't mean to cut you off.
Please do continue asking stuff - PyMuPDF definitely has become a fairly large package.
I am probably beyond the point where I can imagine which aspects may be stumbling stones for new users.
Just ask and I will either provide a verbose answer or point you to a place where this is covered in the docs.
Let me also invite you to improve the documentation. For example there may be gaps for providing gentle starts to newcomers ... or maybe basic stuff about PDFs, or whatever.