Hi Carolyn,
we have the "ImageMagick Video Thumbnail" succesfully working on our
production server (https://hdl.handle.net/11705/SISTEDES/SEMINARIOS).
We're running Debian 12, and ImageMagick 6.9.11-60.
Regarding your problem with video Thumbnails, I think it's related to
this issue discussed long ago:
https://groups.google.com/g/dspace-tech/c/Pz5zGJjAS1w?pli=1
I think it's because you're using an old version of ImageMagick which
expects that MP4 files are specified as "MPEG" rather than as "VIDEO"
when explicitly setting the video file format (exactly, here:
https://github.com/DSpace/DSpace/blob/2205bb18b1786b71d6cef876e67566d35c04bb49/dspace-api/src/main/java/org/dspace/app/mediafilter/ImageMagickVideoThumbnailFilter.java#L66).
That's my guess from inspecting the code.
Here's the commit when the developers of ImageMagick introduced this
breaking change
(https://github.com/ImageMagick/ImageMagick6/commit/4872c693299802cfe6677742867098f64440d9aa).
It was around version 6.9.11-31.
I have planned to send a PR to make that part of the code configurable,
but didn't have the time.
Regarding your issue with PDF files, is a configuration issue of
ImageMagick. See
https://wiki.lyrasis.org/display/DSDOC7x/ImageMagick+Media+Filters#ImageMagickMediaFilters-%22convert.im6:notauthorized%22errors
Best regards,
Abel
El 28/10/2025 a las 21:39, Carolyn Sullivan escribió:
Hello all,
Wondering if anyone has managed to produce thumbnails of mp4 files
yet. If so, how did you do it? I have the most current versions of
ImageMagick, Ghostscript and ffmpeg on my server (6.9.10-23, 9.50, and
4.2.7-0ubuntu0.1, respectively). I'm running DSpace 7.6.2. I added
filter.plugins = ImageMagick Video Thumbnail to my local.cfg.dev
file. However, running sudo -u tomcat /var/dspace/bin/dspace
filter-media -i [collection handle] -v, it gives NO output for video
files, not even an error... and for pdfs, it's telling me:
org.im4java.core.CommandException: convert-im6.q16: attempt to
perform an operation not allowed by the security policy `PDF' @
error/constitute.c/IsCoderAuthorized/413
which seems to be possibly a separate problem.
Anyone see this before or have any idea as to the cause?
Thanks,
Carolyn.
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