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PDFTK also leaves the files unchanged, exactly as libreoffice does, another possibilty could be qpdf: > andrew@a68n:~/Documents/SCAN$ qpdf --help > > Usage: qpdf [ options ] { infilename | --empty } [ outfilename ] > > An option summary appears below. Please see the documentation for details. > > Note that when contradictory options are provided, whichever options are > provided last take precedence. > > > Basic Options > ------------- > > --password=password specify a password for accessing encrypted files > --linearize generated a linearized (web optimized) file > --copy-encryption=file copy encryption parameters from specified file > --encryption-file-password=password > password used to open the file from which encryption > parameters are being copied > --encrypt options -- generate an encrypted file > --decrypt remove any encryption on the file > --pages options -- select specific pages from one or more files > > If none of --copy-encryption, --encrypt or --decrypt are given, qpdf will > preserve any encryption data associated with a file. > > Note that when copying encryption parameters from another file, all > parameters will be copied, including both user and owner passwords, even > if the user password is used to open the other file. This works even if > the owner password is not known. > > > Encryption Options > ------------------ > > --encrypt user-password owner-password key-length flags -- > > Note that -- terminates parsing of encryption flags. > > Either or both of the user password and the owner password may be > empty strings. > > key-length may be 40, 128, or 256 > > Additional flags are dependent upon key length. > > If 40: > > --print=[yn] allow printing > --modify=[yn] allow document modification > --extract=[yn] allow text/graphic extraction > --annotate=[yn] allow comments and form fill-in and signing > > If 128: > > --accessibility=[yn] allow accessibility to visually impaired > --extract=[yn] allow other text/graphic extraction > --print=print-opt control printing access > --modify=modify-opt control modify access > --cleartext-metadata prevents encryption of metadata > --use-aes=[yn] indicates whether to use AES encryption > --force-V4 forces use of V=4 encryption handler > > If 256, options are the same as 128 with these exceptions: > --force-V4 this option is not available with 256-bit keys > --use-aes this option is always on with 256-bit keys > --force-R5 forces use of deprecated R=5 encryption > > print-opt may be: > > full allow full printing > low allow only low-resolution printing > none disallow printing > > modify-opt may be: > > all allow full document modification > annotate allow comment authoring and form operations > form allow form field fill-in and signing > assembly allow document assembly only > none allow no modifications > > The default for each permission option is to be fully permissive. > > Specifying cleartext-metadata forces the PDF version to at least 1.5. > Specifying use of AES forces the PDF version to at least 1.6. These > options are both off by default. > > The --force-V4 flag forces the V=4 encryption handler introduced in PDF 1.5 > to be used even if not otherwise needed. This option is primarily useful > for testing qpdf and has no other practical use. > > > Page Selection Options > ---------------------- > > These options allow pages to be selected from one or more PDF files. > Whatever file is given as the primary input file is used as the > starting point, but its pages are replaced with pages as specified. > > --pages file [ --password=password ] [ page-range ] ... -- > > For each file that pages should be taken from, specify the file, a > password needed to open the file (if any), and a page range. The > password needs to be given only once per file. If any of the input > files are the same as the primary input file or the file used to copy > encryption parameters (if specified), you do not need to repeat the > password here. The same file can be repeated multiple times. All > non-page data (info, outlines, page numbers, etc. are taken from the > primary input file. To discard this, use --empty as the primary > input. > > The page range is a set of numbers separated by commas, ranges of > numbers separated dashes, or combinations of those. The character > "z" represents the last page. Pages can appear in any order. Ranges > can appear with a high number followed by a low number, which causes the > pages to appear in reverse. Repeating a number will cause an error, but > the manual discusses a workaround should you really want to include the > same page twice. > > If the page range is omitted, the range of 1-z is assumed. qpdf decides > that the page range is omitted if the range argument is either -- or a > valid file name and not a valid range. > > See the manual for examples and a discussion of additional subtleties. > > > Advanced Transformation Options > ------------------------------- > > These transformation options control fine points of how qpdf creates > the output file. Mostly these are of use only to people who are very > familiar with the PDF file format or who are PDF developers. > > --stream-data=option controls transformation of stream data (below) > --normalize-content=[yn] enables or disables normalization of content streams > --suppress-recovery prevents qpdf from attempting to recover damaged > files > --object-streams=mode controls handing of object streams > --ignore-xref-streams tells qpdf to ignore any cross-reference streams > --qdf turns on "QDF mode" (below) > --min-version=version sets the minimum PDF version of the output file > --force-version=version forces this to be the PDF version of the output file > > Version numbers may be expressed as major.minor.extension-level, so 1.7.3 > means PDF version 1.7 at extension level 3. > > Values for stream data options: > > compress recompress stream data when possible (default) > preserve leave all stream data as is > uncompress uncompress stream data when possible > > Values for object stream mode: > > preserve preserve original object streams (default) > disable don't write any object streams > generate use object streams wherever possible > > In qdf mode, by default, content normalization is turned on, and the > stream data mode is set to uncompress. > > Setting the minimum PDF version of the output file may raise the version > but will never lower it. Forcing the PDF version of the output file may > set the PDF version to a lower value than actually allowed by the file's > contents. You should only do this if you have no other possible way to > open the file or if you know that the file definitely doesn't include > features not supported later versions. > > Testing, Inspection, and Debugging Options > ------------------------------------------ > > These options can be useful for digging into PDF files or for use in > automated test suites for software that uses the qpdf library. > > --static-id generate static /ID: FOR TESTING ONLY! > --static-aes-iv use a static initialization vector for AES-CBC > This is option is not secure! FOR TESTING ONLY! > --no-original-object-ids suppress original object ID comments in qdf mode > --show-encryption quickly show encryption parameters > --check-linearization check file integrity and linearization status > --show-linearization check and show all linearization data > --show-xref show the contents of the cross-reference table > --show-object=obj[,gen] show the contents of the given object > --raw-stream-data show raw stream data instead of object contents > --filtered-stream-data show filtered stream data instead of object contents > --show-npages print the number of pages in the file > --show-pages shows the object/generation number for each page > --with-images also shows the object IDs for images on each page > --check check file structure + encryption, linearization > > The --raw-stream-data and --filtered-stream-data options are ignored > unless --show-object is given. Either of these options will cause the > stream data to be written to standard output. > > If --filtered-stream-data is given and --normalize-content=y is also > given, qpdf will attempt to normalize the stream data as if it is a > page content stream. This attempt will be made even if it is not a > page content stream, in which case it will produce unusable results. > > Ordinarily, qpdf exits with a status of 0 on success or a status of 2 > if any errors occurred. In --check mode, if there were warnings but not > errors, qpdf exits with a status of 3. > Or possibly a combination of some of the following tools: > andrew@a68n:~/Documents/SCAN$ apropos pdf > dvipdf (1) - Convert TeX DVI file to PDF using ghostscript and dvips > evince-thumbnailer (1) - create png thumbnails from PostScript and PDF > documents > fig2mpdf (1) - creation of multilayer pdf or eps figures from fig > files using > latex for typesetting fix-qdf (1) - repair PDF files in QDF form > after editing > foomatic-ppdfile (1) - Generate a PPD file for a given printer/driver combo > ghostscript (1) - Ghostscript (PostScript and PDF language interpreter > and > previewer) gs (1) - Ghostscript (PostScript and PDF language > interpreter > and previewer) gsnd (1) - Run ghostscript (PostScript and PDF > engine) > without display htdig-pdfparser (1) - parse a PDF document (wrapper script > for htdig) > Image::ExifTool::PDF (3pm) - Read PDF meta information > Image::ExifTool::WritePDF (3pm) - Write PDF meta information > Mail::SpamAssassin::Plugin::PDFInfo (3pm) - PDFInfo Plugin for SpamAssassin > mupdf (1) - MuPDF is a lightweight PDF viewer written in portable C > mupdf-x11 (1) - MuPDF is a lightweight PDF viewer written in portable C > pdf-meta (1) - read and write metadata from a PDF file > pdf2dsc (1) - generate a PostScript page list of a PDF document > pdf2ps (1) - Ghostscript PDF to PostScript translator > pdfdetach (1) - Portable Document Format (PDF) document embedded file > extractor > (version 3.03) pdffonts (1) - Portable Document Format (PDF) font > analyzer > (version 3.03) pdfimages (1) - Portable Document Format (PDF) image > extractor > (version 3.03) pdfinfo (1) - Portable Document Format (PDF) document > information extractor (version 3.03) pdfopt (1) - Ghostscript PDF > Optimizer > pdfseparate (1) - Portable Document Format (PDF) page extractor > pdftexi2dvi (1) - convert Texinfo documents to DVI or PDF > pdftk (1) - A handy tool for manipulating PDF > pdftocairo (1) - Portable Document Format (PDF) to > PNG/JPEG/TIFF/PDF/PS/EPS/SVG > using cairo pdftohtml (1) - program to convert PDF files into HTML, > XML and PNG > images pdftoppm (1) - Portable Document Format (PDF) to Portable > Pixmap (PPM) > converter (version 3.03) pdftops (1) - Portable Document Format > (PDF) to > PostScript converter (version 3.03) pdftotext (1) - Portable Document > Format > (PDF) to text converter (version 3.03) pdfunite (1) - Portable > Document Format > (PDF) page merger ps2ascii (1) - Ghostscript translator from > PostScript or PDF > to ASCII ps2pdf (1) - Convert PostScript to PDF using ghostscript > ps2pdf12 (1) - Convert PostScript to PDF 1.2 (Acrobat 3-and-later > compatible) > using ghostscript ps2pdf13 (1) - Convert PostScript to PDF 1.3 > (Acrobat > 4-and-later compatible) using ghostscript ps2pdf14 (1) - Convert > PostScript to > PDF 1.4 (Acrobat 5-and-later compatible) using ghostscript ps2pdfwr (1) > - > Convert PostScript to PDF without specifying CompatibilityLevel, using > ghostscript > pstoedit (1) - a tool converting PostScript and PDF files into > various vector > graphic formats pstotext (1) - extract ASCII text from a PostScript > or PDF file > qpdf (1) - PDF transformation software texi2dvi (1) - > convert > Texinfo documents to DVI or PDF texi2pdf (1) - convert Texinfo > documents to DVI > or PDF Cannot go less mousey yet concerning this, it's kind of beyond my scope and too expensive right now, I mean time-consuming, so currently there is no alternative to the libreoffice-downgrade. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlgCYDUACgkQ5+rBHyUt5wt4owCeI2Ph/LaGdQUhHV6vyAHYZPW5 8RoAoL7fN9VJC6omeuLyJvhbui4iqvRD =QAoP -----END PGP SIGNATURE-----