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https://issues.apache.org/jira/browse/PDFBOX-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13454145#comment-13454145
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Sheila Morrissey commented on PDFBOX-944:
-----------------------------------------
See similar problem in 1.6, 1.7 -- though NonSequentialParser class seems to
handle same files correctly
> number of pages returns the incorrect number for some PDFs
> ----------------------------------------------------------
>
> Key: PDFBOX-944
> URL: https://issues.apache.org/jira/browse/PDFBOX-944
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.4.0
> Reporter: Adam Nichols
>
> This is a regression bug which appeared between 1.3.1 and 1.4.0, as the
> former returns the correct page count while the latter does not.
> Unfortunately, the PDF which demonstrates this problem is confidential, so I
> can not attach it here, however I will describe the things which may be
> causing this problem as best I can.
> The problem does not occur after using the "uncompress" feature of pdftk.
> The problem does not occur after using PdfDecompressor from PDFBox. The
> original file which was given to me is Linearized. In Adobe Acrobat Standard
> -> File -> Properties, it says the Application was "Adobe Photoshop CS4
> Windows", the PDF Producer was "Adobe Photoshop for Windows -- Image
> Conversion Plug-in" and the PDF Version is 1.7 (Acrobat 8.x). Fast Web View
> is set to "No". I suspect that the problem has to do with the fact that it's
> Lineraized or the fact that it uses ObjStm. I don't have enough time to
> trace through this, so I'm either going to revert back to PDFBox 1.3.1 or
> pre-process all the ObjStm objects, save the uncompressed file, and then
> process that. The latter is less efficient, but I think it'll handle more
> cases. I just wanted to make sure to open an issue here on JIRA so we can
> eventually get a proper solution to this problem.
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