TIFF files with “packbits compression” cannot be converted to PDF files

[leo20160311]

mydoc = fitz.open(stream=tiff_bytes, filetype=‘tif’)

mydoc = mydoc.convert_to_pdf()
mydoc = fitz.open('pdf', mydoc)

outdoc = fitz.open()
outdoc.insert_pdf(mydoc)
outdoc.save(outpdfpath)

Can someone help ？ generated file content is incorrect

[JorjMcKie]

Please provide a file to reproduce.

[JorjMcKie]

If you can open the TIFF as a Pixmap, you can still insert it as an image in a PDF page of suitable size:

tif = "file.tif"
pix = fitz.Pixmap(tif)
doc=fitz.open()
page=doc.new_page(width=pix.width, height=pix.height)
page.insert_image(page.rect, filename=tif)
doc.save("file.pdf",deflate=True)

[leo20160311]

@JorjMcKie Thank you！

I tested more than ten TIFF files, but none of them could be converted to the correct PDF. The content of the converted PDF file is black.

Additionally, I am unable to upload files on Github and have already uploaded them to Gitee:
https://gitee.com/liudg2012/tiff.git

[leo20160311]

@JorjMcKie Thank You！
Additionally, in practical use, my TIFF file is multi page and using pixmap is not very convenient

[JorjMcKie]

Additionally, I am unable to upload files on Github and have already uploaded them to Gitee

Sorry cannot find any graphic file there. Please use a conventional ZIP of at least one TIFF.
BTW: if the error can be confirmed, it will be a MUPDF problem ... but anyway, we need an example.

[JorjMcKie]

Reminder: this issue cannot be processed if you don't provide an example TIFF.

[leo20160311]

i found your email address：[jorj.x.mckie@outlook.de]，and I am now sending it to you via email. Thank you
Look forward to your reply

[JorjMcKie]

Thanks for submitting the image. It is a very small image. I was able to convert it to PDF. The result is not black but looks like so:

Don't know if this is correct or not ...

[leo20160311]

I'm very sorry, I provided you with an incorrect example
Yes, you are right. After zooming in on this TIFF file, I found that it matches the converted PDF file. I thought it was the same as what I tested on a virtual computer, but now it's not a pure black block.

I finally found the appropriate TIFF file and sent you a new email containing the TIFF file and my test results. Please help, thank you very much

[JorjMcKie]

Thanks for the new files. I tested them with the new PyMuPDF version coming out soon.
Good news: only one of the example files has problems (convered to black): gray.packbits.u2.tif, all the others work correctly.

[leo20160311]

Thanks for the new files. I tested them with the new PyMuPDF version coming out soon. Good news: only one of the example files has problems (convered to black): gray.packbits.u2.tif, all the others work correctly.

Thank you very much for your patient response. I am looking forward to the final result

[leo20160311]

@JorjMcKie @radarher
Wow, is Radarrhere and JorjMcKie on the same team? First of all, thank you to the two enthusiastic technical experts

python-pillow/Pillow#7084
This issue was also submitted by me. I tried some wrapping solutions, but I couldn't solve any problems, haha
My focus is: I have a bunch of images and documents in various formats, and I need to merge them into one PDF I haven't been able to achieve it yet, I need help, thank you very much

[leo20160311]

I just checked this file<gray.packbits.u2.tif> and realized that the content itself is black. Could it be that I misled you? However, it may be necessary to note that this file has two pages, both of which are black At 2023-04-12 20:56:45, "Jorj X. McKie" ***@***.***> wrote: Thanks for the new files. I tested them with the new PyMuPDF version coming out soon. Good news: only one of the example files has problems (convered to black): gray.packbits.u2.tif, all the others work correctly. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[leo20160311]

Thanks for the new files. I tested them with the new PyMuPDF version coming out soon. Good news: only one of the example files has problems (convered to black): gray.packbits.u2.tif, all the others work correctly.

I just checked this file<gray.packbits.u2.tif> and realized that the content itself is black. Could it be that I misled you? However, it may be necessary to note that this file has two pages, both of which are black

[JorjMcKie]

According to our e-mail conversation, this issue can be closed with the new version, right?

[leo20160311]

I would like to test it with the new version so that it can be confirmed, thanks

[JorjMcKie]

I would like to test it with the new version so that it can be confirmed, thanks

Ok, sure. Then please install the new version, test it and let us know your findings.
Thank you!

[leo20160311]

Thank you very much for your reply. You have completely resolved my issue through version 1.22.0. Thank you very much