Thumbnails generation

[Leandro Pereira]

Hi everyone.

I'm using DSpace version 7.6.1

Is there any way to control or disable the automatic generation of thumbnails? I didn't find the configuration but I noticed that they are being done in the morning without tasks added to crontab.

[Victorhugo Bisangwa]

Hello,

These thumbnails are generated by the media filter (filter-media). Once it runs, the thumbnails are generated. Check if you added this task to crontab.

regards,

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04/12/24, 01:22:55 PM

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[Matthias Letsch]

Hi there,

just as Victorhugo said, the thumbnail generation is done by the command $DSPACE/bin/dspace filter-media (see https://wiki.lyrasis.org/display/DSDOC7x/Scheduled+Tasks+via+Cron)

In addition to thumbnail generation, filter-media is also responsible for text extraction for full-text indexing.

Which filters become active when filter-media is executed can be configured in dspace.cfg (currently from line 446):

#### Media Filter / Format Filter plugins (through PluginService) ####
# Media/Format Filters help to full-text index content or
# perform automated format conversions

#Names of the enabled MediaFilter or FormatFilter plugins
filter.plugins = Text Extractor
filter.plugins = JPEG Thumbnail
filter.plugins = PDFBox JPEG Thumbnail

(https://github.com/DSpace/DSpace/blob/main/dspace/config/dspace.cfg)

You could comment out the following lines here:

 
# filter.plugins = JPEG Thumbnail
# filter.plugins = PDFBox JPEG Thumbnail

This will allow the cronjob to remain active and continue to perform full-text indexing, but no more thumbnails should be generated.

Kind regards,

Matthias

[Leandro Pereira]

But in my case, this is being done automatically without scheduled tasks via cron. This part I didn't understand.

[Emilia Lobo]

How and where do you run the "crontab -e" command on a development machine to test automatically generating thumbnails of items loaded into the local database?
Thank you.

Emilia.-

[Leandro Pereira]

This is my crontab list jobs. No rotine to generate thumbnail. All thumbnails are genereted after hours without an explicit scheduled tasks.

DS_BACKEND = /dspace/backend
JAVA_OPTS="-Xms512m -Xmx512m -XX:+UseG1GC -Dfile.encoding=UTF-8"

5 0 * * *  $DS_BACKEND/bin/dspace subscription-send -f  D > /dev/null

5 0 * * 0  $DS_BACKEND/bin/dspace subscription-send -f W  > /dev/null

5 0 1 * *  $DS_BACKEND/bin/dspace subscription-send -f M  > /dev/null

0 0 * * *  $DS_BACKEND/bin/dspace oai import > /dev/null

0 0 * * *  $DS_BACKEND/bin/dspace index-discovery > /dev/null

30 0 * * * $DS_BACKEND/bin/dspace index-authority > /dev/null

0 1 * * *  $DS_BACKEND/bin/dspace stats-util -i  > /dev/null

30 1 * * * $DS_BACKEND/bin/dspace cleanup > /dev/null