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Is it possible to get the page size (from e.g. a PDF document page) using GhostScript? I have seen the "bbox" device, but it returns the bounding box (it differs per page), not the TrimBox (or CropBox) of the PDF pages. (See http://www.prepressure.com/pdf/basics/page_boxes for info about page boxes.) Any other possibility?
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Ghostscript can be used as a raster image processor (RIP) for raster computer printers—for instance, as an input filter of line printer daemon—or as the RIP engine behind PostScript and PDF viewers. It can also be used as a file format converter, such as PostScript to PDF converter.
To be completely safe from Ghostscript exploits, users need to disable support for other formats -- such as the popular PDF format --because those files can also embed malicious PostScript code, which Ghostscript would execute, as well. The use of ImageMagick with an enabled Ghostscript back end is widespread.
This paper intends to introduce some of the ways the Ghostscript tools can be used to manipulate a PDF file, including creation of bookmarks, annotations, and setting document properties.
Unfortunately it doesn't seem quite easy to get the (possibly different) page sizes (or *Boxes for that matter) inside a PDF with the help of Ghostscript.
But since you asked for other possibilities as well: a rather reliable way to determine the media sizes for each page (and even each one of the embedded {Trim,Media,Crop,Bleed}Boxes) is the commandline tool pdfinfo.exe. This utility is part of the XPDF tools from http://www.foolabs.com/xpdf/download.html . You can run the tool with the "-box" parameter and tell it with "-f 3" to start at page 3 and with "-l 8" to stop processing at page 8.
Example output:
C:\downloads>pdfinfo -box -f 1 -l 3 _IXUS_850IS_ADVCUG_EN.pdf Creator: FrameMaker 6.0 Producer: Acrobat Distiller 5.0.5 (Windows) CreationDate: 08/17/06 16:43:06 ModDate: 08/22/06 12:20:24 Tagged: no Pages: 146 Encrypted: no Page 1 size: 419.535 x 297.644 pts Page 2 size: 297.646 x 419.524 pts Page 3 size: 297.646 x 419.524 pts Page 1 MediaBox: 0.00 0.00 595.00 842.00 Page 1 CropBox: 87.25 430.36 506.79 728.00 Page 1 BleedBox: 87.25 430.36 506.79 728.00 Page 1 TrimBox: 87.25 430.36 506.79 728.00 Page 1 ArtBox: 87.25 430.36 506.79 728.00 Page 2 MediaBox: 0.00 0.00 595.00 842.00 Page 2 CropBox: 148.17 210.76 445.81 630.28 Page 2 BleedBox: 148.17 210.76 445.81 630.28 Page 2 TrimBox: 148.17 210.76 445.81 630.28 Page 2 ArtBox: 148.17 210.76 445.81 630.28 Page 3 MediaBox: 0.00 0.00 595.00 842.00 Page 3 CropBox: 148.17 210.76 445.81 630.28 Page 3 BleedBox: 148.17 210.76 445.81 630.28 Page 3 TrimBox: 148.17 210.76 445.81 630.28 Page 3 ArtBox: 148.17 210.76 445.81 630.28 File size: 6888764 bytes Optimized: yes PDF version: 1.4
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