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https://issues.apache.org/jira/browse/PDFBOX-785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15276168#comment-15276168
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Bastian Preindl commented on PDFBOX-785:
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In Version 1.8.12, this issue still exists. If I split a PDF which contains
scanned images (one on each page) having 6MB in overall size, I get [number of
pages] PDF files having 6MB as well. So each single PDF page contains all
resources of all pages, obviously. When re-merging all pages to one PDF file,
the PDF file (and this is our main issue) becomes [number of pages] multiplied
by the original document size. So a 6MB PDF file with 10 pages becomes a 60MB
PDF file when being split and re-merged.
> Spliting a PDF creates unnecessarily large files
> ------------------------------------------------
>
> Key: PDFBOX-785
> URL: https://issues.apache.org/jira/browse/PDFBOX-785
> Project: PDFBox
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 1.8.8, 2.0.0
> Environment: Windows XP, openOffice3.0.0, pdfsam
> Reporter: mathieu radiguet
> Assignee: Andreas Lehmkühler
> Fix For: 1.8.9, 2.0.0
>
> Attachments: fileSizeIssue.zip
>
>
> Using PDFBox 0.8.0 (also tried on 1.1.0 and 1.2.1) to split files result in
> bigger parts than the original.
> Concerned files were made from openOffice .odt documents in version 3.0.0
> using openOffice pdf Export and then merging several copies with pdfsam
> (http://www.pdfsam.org/)
> In joined eclipse project the test file size is 10 712 749 bytes for 2812
> pages and the result file sizes after splitting in two at page 2300 are : 8
> 812 515 bytes and 10 701 142 bytes.
> Using pdfSplit in command line as result we have all single result files
> bigger than the original. An example is also attached. An error tells the
> original file is corrupted, but we tried it on a file (using pdfsam and
> without using it) with no error and with similar result, so I think it's not
> related.
> This issue seems similar to PDFBOX-28.
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