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[EP-tech] Re: Coversheets - file compression issues?



Hi,
This might be useful: http://stackoverflow.com/questions/8158584/ghostscript-to-merge-pdfs-compresses-the-result

In ~/archives/ARCHIVEID/cfg/cfg.d/z_coversheet.pl, the gs command is:
$c->{gs_pdf_stich_cmd} = "gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=";

**totally untested** Maybe try changing that to something like:
$c->{gs_pdf_stich_cmd} = "gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -sOutputFile=";

The code for the coversheets plugin is here:
https://github.com/eprintsug/coversheets
 - if you want to flag any issues or suggest improvements, go ahead!

Cheers,
John

-----Original Message-----
From: eprints-tech-bounces at ecs.soton.ac.uk [mailto:eprints-tech-bounces at ecs.soton.ac.uk] On Behalf Of George Macgregor
Sent: 09 November 2015 12:02
To: eprints-tech at ecs.soton.ac.uk
Subject: [EP-tech] Coversheets - file compression issues?

Hello colleagues,

A hawkeyed electrical engineering academic at our institution has noticed that our instance of ePrints is applying image compression to PDF files.  The issue appears to stem from the application of the Coversheet plugin.  As far as I can tell, the plugin does not apply any file compression but I suspect the very fact that conversion occurs at all results in some loss of fidelity.  My personal view is that the lossiness is tolerable. I, for example, have never noticed the issue until now; but it does become noticeable when PDF files contain detailed hi-res figures/diagrams, as in this particular instance. 

I am therefore just wondering whether other users have encountered this problem and what, if anything, you did about it?  I can't see it logged anywhere as a known issue, if indeed there is agreement that it is an issue.

Cheers

George

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George Macgregor | Information Services Directorate
Curran Building | University of Strathclyde
Tel: 0141 548 3496
Email: george.macgregor at strath.ac.uk
Web: http://personal.strath.ac.uk/george.macgregor/ 
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