Updating an older PDF version
Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=2542
Printed Date: 19 Feb 26 at 6:11AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com
Topic: Updating an older PDF version
Posted By: BobW
Subject: Updating an older PDF version
Date Posted: 27 Feb 13 at 5:22PM
I regularly receive Acrobat 3 PDF's (version 1.2). I need to convert these to a later version that can handle things like 128 bit encryption. Is there anyway I can read up these older PDF's and write them back as a later version?
Thanks,
Bob
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Replies:
Posted By: Ingo
Date Posted: 27 Feb 13 at 6:50PM
Hi Bob!
Curious problem ;-)
A pdf-document is only the product of a pdf-application.
Normally all pdf-applications are compatible with older
pdf-specs to handle older pdf-documents.
If you have an old pdf-application (perhaps which can only
work with 40-bit-documents) then you should update it to
a newer version.
If you have a very old pdf-document then it could be read,
maintained and modified by any pdf-application. A pdf-
application which supports (for example) pdf-specs 1.6
supports the older specs (like 1.2), too.
QuickPDF can change your old pdf-documents to 128-bit or
256-bit-encryption and many security-options (no print, no
comments, ...) can be set but why?
Cheers and welcome here,
Ingo
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Posted By: BobW
Date Posted: 27 Feb 13 at 7:10PM
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My example wasn't the best. Still, I want these older PDF's to be later versions. Can QuickPDF re-save documents as a different version?
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Posted By: BobW
Date Posted: 27 Feb 13 at 7:20PM
Ah, figured it out. If I use the Encrypt method, and set it to 128 bit encryption, but with no passwords, it converts the documents to 1.6. Setting it to 256 bumps it up to 1.7.
Perfect!
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Posted By: Ingo
Date Posted: 27 Feb 13 at 7:46PM
But this changes the document only less and gives you no advantage.
The only thing which will happen is that users with older pdf-readers
could have problems reading your pdf with the higher encryption ;-)
Cheers, Ingo
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