I need help - I can help - Acrobat Reduce File Size

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Acrobat Reduce File Size

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=2935
Printed Date: 29 Apr 24 at 10:36AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Acrobat Reduce File Size

Posted By: BobW
Subject: Acrobat Reduce File Size
Date Posted: 15 Jul 14 at 10:25PM

In Acrobat I can select the menu option Document->Reduce File Size and shrink a document I have from 46K to 16K. I've tried using CompressContent and CompressPage but the document remains the same size. The CompressContent and CompressPage functions return success (1) indicating success. Is there another function for reducing file size that I'm missing?

Thanks,

BobW

Replies:

Posted By: Wheeley
Date Posted: 16 Jul 14 at 12:05AM

This is a known limitation with the library. Many PDFs compress the stream within the PDF reducing the file size. Do a forum search and you will see this has been brought up numerous times.

For fun, export data from Excel to a PDF. Notice the file size. Next load the file into QuickPDF and then save the newly loaded file. You will notice the file's size is a lot larger than the original.

Wheeley

Posted By: AndrewC
Date Posted: 23 Jul 14 at 10:04AM

Bobw,

Document->Reduce File Size is a complex function that loads each image and re-compresses it into the smallest size possible by trying various algorithms such as JBIG2 and JPEG2000. These are complex algorithms to implement.

CompressContent and CompressPage basically turn on compression for the object streams to help reduce filesize. These days most PDF's have compression turned on by default.

Excel generates strange and overly complex PDF content streams.

Andrew.