Invalid rotation when converting jpg to pdf with python

Question

I'm trying to convert a jpg to pdf with img2pdf.

It works with most jpg's but not all.

Here is my script:

import img2pdf
import PIL.Image
import os
image = PIL.Image.open("Lidl.jpg")
pdf_bytes = img2pdf.convert(image.filename)
file = open(pdf_path, "wb")
file.write("file.pdf")
image.close()
file.close()

Here is the error I get:

Traceback (most recent call last):
  File "test.py", line 8, in <module>
    pdf_bytes = img2pdf.convert(image.filename)
  File "/home/ksb/Dropbox/Python/imap/venv/lib/python3.6/site-packages/img2pdf.py", line 1829, in convert
    ) in read_images(rawdata, kwargs["colorspace"], kwargs["first_frame_only"]):
  File "/home/ksb/Dropbox/Python/imap/venv/lib/python3.6/site-packages/img2pdf.py", line 1191, in read_images
    imgdata, imgformat, default_dpi, colorspace, rawdata
  File "/home/ksb/Dropbox/Python/imap/venv/lib/python3.6/site-packages/img2pdf.py", line 1030, in get_imgmetadata
    'Image "%s": invalid rotation (%d)' % (im.name, value)
NameError: name 'im' is not defined

If I look into the image meta data it says:

Unknown rotation value 0
ColorSpace=sRGB

Is is possible to set the rotation value?

Any hints are very much appreciated.

BR Kresten

Answer 1

I guess the problem is with below code line.

file.write("file.pdf")

Here try passing the bytes you got from convert function.

file.write(pdf_bytes)

For the error you are getting you may try as said below. Try using library imdirect

from PIL import Image
import imdirect
img = Image.open('Lidl.jpg')
img_rotated = imdirect.autorotate(img)

The above code snippet is copied from project description page of the library. Also read the quick description, to know why such problems occur.

https://pypi.org/project/imdirect/

If still not working, as a part of last try, rotate the image after opening and before converting into bytes, with the desired angle that satisfies your requirement.

image = PIL.Image.open("Lidl.jpg")
image.rotate(90) #90 is rough number, you calculate, what you need.
pdf_bytes = img2pdf.convert(image.filename)

Answer 2

from PIL import Image

image1 = Image.open(r'C:\Users\Ron\Desktop\Test\image1.png')
image2 = Image.open(r'C:\Users\Ron\Desktop\Test\image2.png')
image3 = Image.open(r'C:\Users\Ron\Desktop\Test\image3.png')
image4 = Image.open(r'C:\Users\Ron\Desktop\Test\image4.png')
 
im1 = image1.convert('RGB')
im2 = image2.convert('RGB')
im3 = image3.convert('RGB')
im4 = image4.convert('RGB')

imagelist = [im2,im3,im4]

im1.save(r'C:\Users\Ron\Desktop\Test\myImages.pdf',save_all=True, append_images=imagelist)

It is work for me

Answer 3

In documentation check bugs list https://github.com/josch/img2pdf#bugs and you have example from here https://github.com/josch/img2pdf#library how to fix that:

# ignore invalid rotation values in the input images
with open("name.pdf","wb") as f:
    f.write(img2pdf.convert('test.jpg'), rotation=img2pdf.Rotation.ifvalid)

therefore

import img2pdf
import PIL.Image
import os
image = PIL.Image.open("Lidl.jpg")
with open("file.pdf","wb") as f:
    f.write(img2pdf.convert(image.filename), rotation=img2pdf.Rotation.ifvalid)