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https://issues.apache.org/jira/browse/PDFBOX-52?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13920123#comment-13920123
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John Hewson commented on PDFBOX-52:
-----------------------------------
Ah, I misunderstood what was going on, now I see it's an issue with inline
images making use of DCTFilter. Normally DCTFilter is never actually called by
PDFBox code, as DCT handling is done by PDJpeg. However, PDJpeg is an XObject
subclass so it isn't being instantiated for inline images. I was under the
impression that DCTFilter was never called, but obviously it is. As a quick
hack your fix seems perfectly reasonable, apologies for my misunderstanding :)
> DCTFilter is not implemented yet
> --------------------------------
>
> Key: PDFBOX-52
> URL: https://issues.apache.org/jira/browse/PDFBOX-52
> Project: PDFBox
> Issue Type: New Feature
> Components: Rendering
> Assignee: Tilman Hausherr
> Fix For: 1.8.5, 2.0.0
>
> Attachments: FilterManager.patch, JPXFilter.patch,
> amyuni2_05d__pdf1_3_acro4x.pdf-1.png, dctfilter.patch
>
>
> [imported from SourceForge]
> http://sourceforge.net/tracker/index.php?group_id=78314&atid=552835&aid=1181506
> Originally submitted by joswol on 2005-04-12 07:03.
> PDFBox-0.7.1: org.pdfbox.filter.DCTFilter - Warning:
> DCTFilter.decode is not implemented yet, skipping this
> stream.
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