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https://issues.apache.org/jira/browse/PDFBOX-5211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17361340#comment-17361340
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Tilman Hausherr commented on PDFBOX-5211:
-----------------------------------------
{code}
try (PDDocument doc = PDDocument.load(new File("original.pdf")))
{
for (PDPage page : doc.getPages())
{
// page.getCOSObject().removeItem(COSName.PIECE_INFO); // when
2.0.24 is released
page.getCOSObject().removeItem(COSName.getPDFName("PieceInfo"));
}
doc.save(new File("original_saved.pdf"));
}
{code}
According to the specification /PieceInfo may also be elsewhere, but here it
wasn't. This code saves a file with a similar size than yours.
> How can I clear unused data?
> -----------------------------
>
> Key: PDFBOX-5211
> URL: https://issues.apache.org/jira/browse/PDFBOX-5211
> Project: PDFBox
> Issue Type: Wish
> Environment: mac os
> Reporter: yoonho
> Priority: Major
> Attachments: 스크린샷 2021-06-10 오후 8.08.39.png
>
>
> How can I delete unused elements (for Photoshop, for InDesign, etc) within a
> PDF file?
> After applying Adobe DC's optimization options (I posted in the screenshot),
> I found that a pdf file of 380mb was reduced to around 48mb. This feature is
> very useful to me. How can I implement it with pdfbox?
> I tried several ways, but couldn't find a way. I need advice.
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