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https://issues.apache.org/jira/browse/PDFBOX-5522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17620014#comment-17620014
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Andreas Lehmkühler commented on PDFBOX-5522:
--------------------------------------------

I concur with [~tilman] and [~msahyoun]

1) Please create a ticket for those cases, ideally with a sample pdf. I'm 
pretty sure that others are interested in fixing such pdfs as well ;-)

2) Can you give us some details about those "best compressions" optimizations? 
OK, to add a missing compression is easy and 3.0.0 will add compressed object 
streams by default. But in what cases are you replacing an existing compression 
method with a better one?

> Add public void save(COSWriter writer) to PDDocument
> ----------------------------------------------------
>
>                 Key: PDFBOX-5522
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5522
>             Project: PDFBox
>          Issue Type: New Feature
>          Components: PDModel
>    Affects Versions: 2.0.28, 3.0.0 PDFBox
>            Reporter: Stefan Ziegler
>            Priority: Minor
>         Attachments: PDDocument.java.patch
>
>
> Please add the following method to PDDocument:
>  
> {code:java}
> public void save(COSWriter writer){code}
>  
> Why?
> This gives us the possibility to use a custom COSWriter when saving the PDF 
> file. Inside the custom COSWriter we can add some checks and convert some 
> data structures if required.
>  
> Patch is attached.
>  



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