Hi Alex,
do you mind sharing the problematic file with me? (I'm the one who
contributed the ImageMagickVideoThumbnailFilter).
Cheers,
Abel
El 17/09/2025 a las 6:20, alex buckley escribió:
Hi DSpace community,
We have a partner library running DSpace 7.6.3 on a RedHat server.
Now the backend DSpace server has ImageMagick installed, and we are
able to successfully manually test ImageMagick webp conversion.
However, when we manually run the filter-media script on an item the
video thumbnail generation fails with
/org.im4java.core.CommandException: Unknown encoder 'webp' - /see
below output:
/
/
/---/
[dspace]# bin/dspace filter-media -v -i '10292/19016'
The script has started
The following MediaFilters are enabled:
Full Filter Name:
org.dspace.app.mediafilter.ImageMagickVideoThumbnailFilter
org.dspace.app.mediafilter.ImageMagickVideoThumbnailFilter
PROCESSING: bitstream XXX (item: 10292/19016)
File: Black and Pink Minimalist Welcome To My Channel YouTube Video
(1).mp4.jpg
IM Thumbnail Param: -auto-orient
VIDEO:/tmp/imthumb8300761135230282362.tmp[100] -thumbnail 257x350
/tmp/imthumb8300761135230282362.tmp.jpg
ERROR filtering, skipping bitstream:
Item Handle: 10292/19016 Bundle Name: ORIGINAL File Size: 460491
Checksum: XXX (MD5) Asset Store: 0 Internal ID: XXX
org.im4java.core.CommandException: Unknown encoder 'webp'
Caused by: org.im4java.core.CommandException Unknown encoder 'webp'
The script has completed
[dspace]#
---
Has anyone else in the DSpace community encountered this error before
and if so how did you approach fixing it?
Thanks,
Alex
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Abel Gómez Llana, PhD
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