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120114 Florian Philipp wrote: |
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> Am 14.01.2012 04:21, schrieb Philip Webb: |
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>> 120113 Florian Philipp wrote: |
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>>> Try the pdfdebugger provided by dev-java/pdfbox to inspect both files. |
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>> That needs Java, which I am definitely not going to re-install (smile). |
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> Well, I'll resist the temptation to start a flamewar over this ;) |
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Yes, definitely (grin). |
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>> I've now uploaded the files above & everyone can inspect their structure: |
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>> http://www.chass.utoronto.ca/~purslow/test/ |
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>> I've renamed the PDFs to show their origin, ie LibreOffice + Ghostscript. |
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> I can reproduce the behavior with my LO. |
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> I've inspected the files with pdfdebugger. The LO-version really |
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> contains more, but nothing which seems to justify the difference. |
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> the content streams of each page seem to be better compressed by LO. |
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> Cups-PDF creates a smaller PDF than ps2pdf, probably because it outputs |
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> PDF-1.5. Otherwise it is identical to the other ghostscript outputs. |
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> Out of curiosity, I removed all pictures from an old report (25 pages) |
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> and tested that. There, Cups-PDF creates larger files than LO |
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> although the internal structure is similar to what you've provided. |
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> So I guess, all we can say is that their performance is inconsistent. |
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I suspect the difference in font resources (see other msg) |
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causes the difference in file sizes. |
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|
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I discovered Pdf2ps among the Ghostscript binaries. |
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It allows a very simply means of reducing PDF size : |
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570: lit> pdf2ps boox.pdf boox-test.ps |
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572: lit> ps2pdf boox-test.ps boox-test.pdf |
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573: lit> ls -l |
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-rw-r--r-- 1 purslow purslow 67184 Jan 13 04:07 boox-gs.pdf |
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-rw-r--r-- 1 purslow users 366711 Jan 13 04:05 boox.pdf |
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-rw-r--r-- 1 purslow purslow 65695 Jan 14 06:52 boox-test.pdf |
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-rw-r--r-- 1 purslow purslow 407541 Jan 14 06:52 boox-test.ps |
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|
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Ie take the LO PDF, convert it to PS with Pdf2ps, |
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then again to PDF with Ps2pdf & you get a file similar to the version |
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produced by creating a PS in LO & then converting that to PDF. |
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Perhaps this is not surprising, but it may help with PDFs from elsewhere. |
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This doesn't work if the PDF contains images, but for purely text files |
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it makes sense when using LO to create a PDF via PS, not directly. |
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PS I'm also heartened to discover that Pdftk still works without Java. |
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-- |
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========================,,============================================ |
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SUPPORT ___________//___, Philip Webb |
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ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto |
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TRANSIT `-O----------O---' purslowatchassdotutorontodotca |
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