Debenu Quick PDF Library - PDF SDK Community Forum : ExtractPageRanges

ExtractPageRanges : I thinkthe problem come with an...

Sun, 03 Jan 2010 10:51:00 +0000

Author: DELBEKE
Subject: 1300
Posted: 03 Jan 10 at 10:51AM

I think the problem come with an unusual contruction of the Pages directory in the pdf

Usualy, a pages directoy look like this

1 0 obj
<<
/Type /Pages
/Count 2
/Kids [ 2 0 R 134 0 R ]
>>

The count entry say how much pages are defined in the pdf and the kids entry show where the pages begin

When a Kid entry points to another page directory, ExtrafilePage is lost

In the sample the page 1 entry look like this

2 0 obj
<<
/Type /Page
/Parent 1 0 R
/MediaBox [ 0 0 612 792 ]
/CropBox [ 0 0 612 792 ]
/Resources <<
/ProcSet [ /PDF /Text /ImageB /ImageC /ImageI ]
/XObject <<
/iSQPIm1fead741 133 0 R
>>
>>
/Contents [ 5 0 R ]
>>

And the second one

134 0 obj
<<
/Type /Pages
/Count 1
/Kids [ 135 0 R ]
/Parent 1 0 R
>>
endobj

This one is a sub-page directory and if this construction is not a bad one, it is also unusual.

The ExtratPageFile can't handle it.

Edited by DELBEKE - 03 Jan 10 at 10:55AM

ExtractPageRanges : Hello mhc, I confirmed what you...

Sun, 03 Jan 2010 01:01:00 +0000

Author: shimax
Subject: 1300
Posted: 03 Jan 10 at 1:01AM

Hello mhc,

I confirmed what you have described.
It can be confirmed by simply downloading A Customizable Demo For Quick PDF Library at:
http://www.quickpdflibrary.com/blog/2009/10/a-customizable-demo-for-quick-pdf-library/

and by editing the sample code of ExtractFilePages like below:

//QP.ExtractFilePages(GetInputFolder() + "sign_me.pdf", GetOutputFolder() + "extracted_page_range.pdf", "2-5, 8, 10, 13-19");
QP.ExtractFilePages(GetInputFolder() + "Moby_Dick_NT.pdf", GetOutputFolder() + "extracted_page_range.pdf", "2-5, 8, 10, 13-19");

sign_me.pdf works but Moby_Dick_NT.pdf does not work well and 13 pages of blank pages are produced.

And I tested with other PDF files which I have, and encountered the strange things.
Some files failed in being extracted ( error code is 409: Invalid file structure, file is damaged.) but if I copy them from C drive to F drive, they success in being extacted.
I wonder why the same files show different results.

Maybe this phenomena is because of my special environment. My OS is Japanese (But in my tests, no unicode paths are involved. ), and I develop with PHP and ActiveX.

Anyway, I think your description can be confirmed in my environment.

ExtractPageRanges : Ingo wrote:Hi mhc!Here you'll...

Thu, 31 Dec 2009 17:26:37 +0000

Author: mhc
Subject: 1300
Posted: 31 Dec 09 at 5:26PM

Ingo wrote:

Hi mhc!

Here you'll find all you need for your first steps:
http://www.quickpdf.org/forum/quickpdf-the-first-steps_topic1242.html

Cheers and welcome here!
Ingo

Thanks Ingo,
This function does not work for some of our PDF's. I tried another PDF it works but not others. Do you have any ideas why it would work for some PDF's but not others? I can email you the PDF it doesn't work for if you want.

ExtractPageRanges : Hi mhc!Here you'll find all...

Thu, 31 Dec 2009 17:20:38 +0000

Author: Ingo
Subject: 1300
Posted: 31 Dec 09 at 5:20PM

Hi mhc!

Here you'll find all you need for your first steps:
http://www.quickpdf.org/forum/quickpdf-the-first-steps_topic1242.html

Cheers and welcome here!
Ingo

ExtractPageRanges : Update:I got it to create the...

Tue, 29 Dec 2009 21:57:21 +0000

Author: mhc
Subject: 1300
Posted: 29 Dec 09 at 9:57PM

Update:
I got it to create the file now but it only creates 1 page correctly. Page 1 is correct and then Page 2 is blank.

ExtractPageRanges : I have a PDF that I need to extract...

Tue, 29 Dec 2009 21:41:10 +0000

Author: mhc
Subject: 1300
Posted: 29 Dec 09 at 9:41PM

I have a PDF that I need to extract certain pages out and create another pdf with just those pages. ISED seems to have the function:

QP.ExtractFilePages Input, Output, Pages

What I am passing is this:
QP.ExtractFilePages PDFName, NewPDF, "1-2"

When I do this the NewPDF does not get created.

Any help on why this does not work?