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Old 09-13-2012, 01:53 AM   #1
Raja1205
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How to retain the PDF's compression when changing the PDF version?

Hi,

I need to change the PDF version from "1.5" to "1.6" without changing the original PDF compression (i.e compressed object streams) using "Acrobat X pro".

I had tried to change one sample PDF version from 1.5 to 1.6 using "PDF Optimizer" and found the following results.

================================

Input PDF contains the following properties:

Document Properties
--------------------
1. Total pages:256
2. PDF version: 1.5
3. Tagged PDF: No
4. Fast Web View: No

Available Compressions (Identified through "Preflight>Pages" profile)
----------------------
1. Page description is compressed for all the pages (256)
2. Pages has compressed object streams for "254" pages except "Front Cover" and "Back Cover"


Output PDF contains the following properties:

Document Properties
--------------------
1. Total pages:256
2. PDF version: 1.6
3. Tagged PDF: No
4. Fast Web View: No

Available Compressions (Identified through "Preflight>Pages" profile)
----------------------
1. Page description is compressed for all the pages (256)
2. Pages has compressed object streams for all the "256" pages including "Front Cover" and "Back Cover"

================================

In the output PDF, "Pages has compressed object streams" found for all the "256" pages (but input PDF has only 254 pages) including "Front Cover" and "Back Cover".

But I want to retain all the properties of input PDF with version change. This is my actual requirement.

Notes:

I had tried all the options of "Clean Up" (PDF optimizer>Clean Up) but "Pages has compressed object streams" applied automatically.

If I check the option "Optimize the PDF for fast web view" under Clean Up, then output retain the required source PDF compression. But I must not change the source PDF to "Fast web view".


I hope that Acrobat expert will offer some useful suggestions for the above. Thanks in advance.


Regards,
Raja. S
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