Unknown encoder 'webp' error from filter-media video thumbnail generation

[alex buckley]

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

[Abel Gómez]

Hi Alex,

do you mind sharing the problematic file with me? (I'm the one who contributed the ImageMagickVideoThumbnailFilter).

Cheers,

Abel

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[alex buckley]

Many thanks for your reply Abel!

I've got a different example we can use and the file itself can be fetched from https://openrepositorydev.aut.ac.nz/bitstreams/9f8c8a76-9675-4ca4-9f54-86043d021a27/download

bin/dspace filter-media -v -i '10292/18369'

The script has started
The following MediaFilters are enabled:

Full Filter Name: org.dspace.app.mediafilter.JPEGFilter
org.dspace.app.mediafilter.JPEGFilter
Full Filter Name: org.dspace.app.mediafilter.TikaTextExtractionFilter
org.dspace.app.mediafilter.TikaTextExtractionFilter

Full Filter Name: org.dspace.app.mediafilter.ImageMagickVideoThumbnailFilter
org.dspace.app.mediafilter.ImageMagickVideoThumbnailFilter

Full Filter Name: org.dspace.app.mediafilter.PDFBoxThumbnail
org.dspace.app.mediafilter.PDFBoxThumbnail
PROCESSING: bitstream XXX (item: 10292/18369)
File: TAKE THE TIME -  New Zealand Tourism For All.mp4.jpg
IM Thumbnail Param: -auto-orient VIDEO:/tmp/imthumb5373020262128477920.tmp[100] -thumbnail 275x350 /tmp/imthumb5373020262128477920.tmp.jpg
ERROR filtering, skipping bitstream:
Item Handle: 10292/18369 Bundle Name: ORIGINAL File Size: 54520644 Checksum: XXX (MD5) Asset Store: 0 Internal ID: XXXX

org.im4java.core.CommandException: Unknown encoder 'webp'
Caused by:  org.im4java.core.CommandException Unknown encoder 'webp'
The script has completed

But it is not just this video bitstream that the video thumbnail won't generate for, it is any mp4 bitstream.