Problem with blank thumbnails

[Baer,Helen]

Hi everyone,

 

One of our partner libraries has a recurring problem with blank thumbnails for pdf's. Their process is to create the original PDF from separate TIFFs in Adobe, then use Adobe Acrobat Pro 2017 to make a smaller sized file. Have any of you seen this before? We're thinking the problem is with the source content, not DSpace, but I thought I'd ask around and see if anyone has a solution.

 

Here's an example: https://mountainscholar.org/handle/10976/167263

 

Best,

 

Helen Baer

Colorado State University

[Alan Orth]

Dear Helen,

I downloaded one of the PDFs in the linked collection and was able to create a nice thumbnail using ImageMagick directly on the command line:

$ convert -flatten CUCSSN83100009.pdf\[0\] CUCSSN83100009.pdf.jpg
$ convert -thumbnail x600 CUCSSN83100009.pdf.jpg CUCSSN83100009-thumbnail.pdf.jpg

So the PDFs seem OK. It could be an issue with memory or ImageMagick version/configuration on your server. Try running the dspace filter-media command in verbose mode for one of the PDFs to see if there are any errors:

$ dspace filter-media -i 10976/167371 -f -v

Regards,

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Alan Orth
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[Alain Tschanz]

Install ImageMagick, add it to dspace.cfg and run these commands to generate thumbnails:

dspace filter-media -f -p "ImageMagick PDF Thumbnail" -v

dspace filter-media -f -p "ImageMagick Image Thumbnail" -v

[Baer,Helen]

Dear Alan and Alain,

We have had some memory issues lately, which we are working on. It hadn't occurred to me that they could be connected. Thanks very much for your responses!

Helen

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From: Alain Tschanz <atsc...@tesu.edu>
Sent: Monday, June 22, 2020 6:54 AM
To: Alan Orth <alan...@gmail.com>; Baer,Helen <Helen...@colostate.edu>
Cc: dspac...@googlegroups.com <dspac...@googlegroups.com>
Subject: RE: *External Email*Re: [dspace-tech] Problem with blank thumbnails

 

Install ImageMagick, add it to dspace.cfg and run these commands to generate thumbnails:

 

dspace filter-media -f -p "ImageMagick PDF Thumbnail" -v

dspace filter-media -f -p "ImageMagick Image Thumbnail" -v

 

From: dspac...@googlegroups.com <dspac...@googlegroups.com> On Behalf Of Alan Orth
Sent: Monday, June 22, 2020 3:47 AM
To: Baer,Helen <Helen...@colostate.edu>
Cc: dspac...@googlegroups.com
Subject: *External Email*Re: [dspace-tech] Problem with blank thumbnails

 

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