Issue with Scrubing the previous history data from the specified PDF. about pdfresurrect HOT 24 CLOSED

Scrubbing is only likely to work if you have a valid PDF that pdfresurrect can operate on. How many versions of the PDF are listed, pdfresurrect -q can tell you that, or just running pdfresurrect without any flags.

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Ya i tried "pdfresurrect -q", I have two edited pdf's, One shows me 1 as output and another with 2. But both the pdf's Srubbing output has no effect, returning the same pdf.

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Scrubbing might be broken. I'll need to do some scrub testing with one of my local PDFs.

from pdfresurrect.

Yeah, sure let me know! if it is working from your side, let me know, happy to share the Pdf's i am using to test.

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Yeah, sure let me know! if it is working from your side, let me know, happy to share the Pdf's i am using to test.

Thanks, I'll let you know! I'll see if I can get to this over the weekend!

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Yeah, sure let me know! if it is working from your side, let me know, happy to share the Pdf's i am using to test.

Thanks, I'll let you know! I'll see if I can get to this over the weekend!

Sure @enferex

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@Hiteshsaai scrubbing is broken, I would only consider it as an experimental feature.

Edit: In some cases it does zero the PDF, but it will likely be unreadable by a viewer.

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is it possible for you to fix it, or is there any other way to retrieve the previous version of pdf from the incremental check ?

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You do not need the scrubbing feature if you just want to explore previous versions. That's what the '-w' option is for.

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but i want to retrieve the previous version of pdf, which is the unedited version

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i tried using the "-W" method, i am not able to open the generated pdf, it says the file has been damaged

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can i share a pdf, can you try it from your side ?

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but i want to retrieve the previous version of pdf, which is the unedited version

That's what the -w argument is for. If the PDF is corrupt, or pdfresurrect cannot read it, then pdfresurrect cannot handle it. Perhaps pdfresurrect can be extended to handle such a case.

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because, i took a amazon invoice, and edited some values using adobe editor and i used that pdf into the pdfresurrect using -W to produce different versioning, i got the pdf's generated but those where broken, then again i created my own pdf having
"hello world" text in it and i added "How are you" and saved it. Now i used the "-W" method, now the generated pdf Version 1 should have "hello world" and version 2 should have "hello world how are you" , i am able to open the version 2, but again here the version 1 was broken, and could not open it, do you have any idea why and is there any conditions only on which "Pdfresurrect" can work ?

Summary of helloword.pdf:
helloworld.pdf: This PDF contains potential cross reference streams.
helloworld.pdf: An object summary is not available.
---------- helloworld.pdf ----------
Versions: 1

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If you modify a PDF by hand, then it will likely not work, as that will generate a corrupted document. If you use a tool to modify a PDF, such as Adobe's editor, then the PDF should be legal. In the dump you reported, the PDF has cross-reference streams, so pdfresurrect is not able to support it completely. Additionally, that dump shows that only one version was identified so no historical information will be produced.

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No i am using Adobe Acrobat Pro DC pdf editor to edit the pdf, i am not doing any manual editing, but still facing that issue,and one more thing, but the Pdf RAW has two %EOF , so it means that the pdf has a updated version right ?

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Two EOF can either mean two versions, or one version where the first EOF is "linearized." A linearized PDF can have two EOF markers for the most recent version.

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is there a way to find if the pdf has a linerized EOF

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is there a way to find if the pdf has a linerized EOF

You should see the text "/Linearized" near the beginning of the pdf.

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so if a Pdf with Linearized means, it is not a edited or a update pdf right ?

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so if a Pdf with Linearized means, it is not a edited or a update pdf right ?

I do not know if that is true. I'm fairly certain there are modified linearized PDFs out there, but without looking and finding a sample, I cannot say this with 100% certainty.

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because i have some of the pdf which are e-mails downloaded as pdf by doing (Ctrl + P) and some pdfs are scanned pdf's, all these have linearized and 2 EOF, and the Creation Date and Modification Date has been changed, but these are real Pdf which has not been edited, but still are said to be modified or has 2 EOF, so i was thinking whether to avoid those linearized Pdf's as not edited to avoid false positive.

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i was thinking whether to avoid those linearized Pdf's as not edited to avoid false positive.

The number of different versions detected should be reported as 1, that should be what the '-q' flag will report.

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Ya exactly that is what i was thinking of, ya by doing that we can avoid the false positive.

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