Hi Steli, I'm writing this message again since it seems it got lost (apologies if, in the end, it's sent twice).
I'm happy to know it works in your production server, but to continue with the discussion (and for the records), I've been able to track down where the error comes from. It seems that the video format changed its name from "MPEG" to "VIDEO" in ImageMagick 6.9.11-31 (see commit https://github.com/ImageMagick/ImageMagick6/commit/4872c693299802cfe6677742867098f64440d9aa). Thus, I'm pretty confident that (assuming ImageMagick has enough resources) the following command will indeed work (notice the MPEG vs VIDEO format): convert -size 640x480 MPEG:./video.tmp[100] thumb.jpg Thus, I'm also pretty confident that changing "VIDEO" to "MPEG" in line 66 in file `dspace-api/src/main/java/org/dspace/app/mediafilter/ImageMagickVideoThumbnailFilter.java` (see https://github.com/DSpace/DSpace/blob/50b47b707ccc4f0d7ed3887f08f0a88a39686f29/dspace-api/src/main/java/org/dspace/app/mediafilter/ImageMagickVideoThumbnailFilter.java#L66) would also make this filter work in older ImageMagick/Linux distributions (such as ubuntu 20.04). Since DSpace has to be installed from sources anyway, I think that changing that line in old systems is not a big deal in specific cases. In any case, ImageMagick delegates are specified in file `/etc/ImageMagick-6/delegates.xml` (you can compare how these files differ between Ubuntu 20.04 and Ubuntu 22.04 and see the MPEG vs VIDEO issue). Thus, I'll try to see if ImageMagick can be configured in such a way that no modifications to DSpace are needed when running ImageMagick < 6.9.11-31. Cheers! Abel El viernes, 17 de noviembre de 2023 a las 14:26:25 UTC+1, Steli Vali escribió: > Hi Abel, > > thank you for helping. > I tried it on Ubuntu 22.04 and it works also there. > So it seems to be a problem that occurs on Ubuntu 20.04 (and maybe other > OSs), but unrelated to DSpace. > Thank you for help and I am happy to see this feature in DSpace, so that > we can provide thumbnails to videos. > (PS: I am lucky that my production system is running on Ubuntu 22.04) > > Abel Gómez schrieb am Freitag, 17. November 2023 um 13:46:10 UTC+1: > >> Hi Steli, >> >> I confirm that the following works in Debian 11: >> >> ``` >> root@debian11:~# wget >> https://biblioteca.sistedes.es/bitstreams/a81773f8-aa61-45b5-90f0-ba53a8cf8378/download >> >> -q -O video.tmp >> root@debian11:~# convert -size 640x480 VIDEO:./video.tmp[100] thumb.jpg >> root@debian11:~# ll -h thumb.jpg >> -rw-r--r-- 1 root root 183K Nov 17 13:36 thumb.jpg >> ``` >> >> But fails in Ubuntu 20.04 with an error similar to the one you reported: >> >> ``` >> root@UBUNTU20:~# wget >> https://biblioteca.sistedes.es/bitstreams/a81773f8-aa61-45b5-90f0-ba53a8cf8378/download >> >> -q -O video.tmp >> root@UBUNTU20:~# convert -size 640x480 VIDEO:./video.tmp[100] thumb.jpg >> convert-im6.q16: unable to open image `VIDEO:./video.tmp[100]': No such >> file or directory @ error/blob.c/OpenBlob/2874. >> convert-im6.q16: no decode delegate for this image format `TMP' @ >> error/constitute.c/ReadImage/572. >> convert-im6.q16: no images defined `thumb.jpg' @ >> error/convert.c/ConvertImageCommand/3258. >> root@UBUNTU20:~# >> ``` >> >> Thus, it seems is something related to the Ubuntu distribution rather >> than DSpace. >> >> In any case, I'll investigate the root cause to see if we can improve the >> documentation at >> https://wiki.lyrasis.org/display/DSDOC7x/ImageMagick+Media+Filters#ImageMagickMediaFilters-PossibleErrors/Issues >> >> I feel kind of responsible since I contributed this video filter :) >> >> Cheers, >> >> Abel >> >> El viernes, 17 de noviembre de 2023 a las 13:00:02 UTC+1, Steli Vali >> escribió: >> >>> Hi Abel, >>> >>> sorry for the late reply, I had some problems with the ORCID in DSpace >>> and prioritesed that. >>> I have tested with you file and the same error: convert-im6.q16: unable >>> to open image `VIDEO:/tmp/imthumb12321.tmp[100]': No such file or directory >>> @ error/blob.c/OpenBlob/2874 >>> >>> Also get the same error when I try to execute it directly in terminal: >>> convert -size 640x480 -depth 8 VIDEO:/home/dspace/FAUDSpace.mp4 vidthumb.png >>> Error: convert-im6.q16: unable to open image >>> `VIDEO:/home/dspace/FAUDSpace.mp4': No such file or directory @ >>> error/blob.c/OpenBlob/2874 >>> >>> What I noticed is that here >>> https://imagemagick.org/script/command-line-processing.php#input the >>> comand is not convert but magick. When I try this command I get "Command >>> 'magick' not found". >>> However convert -version shows: Version: ImageMagick 6.9.10-23 >>> >>> With ImageMagick 6.9.11 I get the same error when I try "convert >>> VIDEO:/FAUDSpace.mp4 vidthumb.png" or "convert -size 640x480 -depth 8 >>> VIDEO:/FAUDSpace.mp4 vidthumb.png". >>> The video has 30 Frames/sec and has 7 seconds, so it has 210 frames. >>> >>> Should I try other command? Or is something wrong with the command or >>> document? >>> >>> Thank you for helping >>> >>> >>> Abel Gómez schrieb am Mittwoch, 15. November 2023 um 21:12:22 UTC+1: >>> >>>> Hi Steli, >>>> >>>> I use: >>>> >>>> Debian 11.8 >>>> Dspace 7.6 >>>> FFMPEG 4.3.6-0+deb11u1 >>>> ImageMagick 6.9.11-60 >>>> >>>> The " VIDEO:/tmp/imthumb12321.tmp[100]" path refers to frame number >>>> 100. It's strange that a 20s. video is less than 20 frames... but, could >>>> it >>>> be the case? >>>> >>>> The "VIDEO:" prefix refers to the ImageMagick "explicit image format" >>>> option on input files (see >>>> https://imagemagick.org/script/command-line-processing.php#input), and >>>> the VIDEO type is specified in the supported file formats list (see >>>> https://imagemagick.org/script/formats.php#supported). >>>> >>>> Can you test with a different file, e.g., GMT20230623-074346-video.mp4 >>>> available at https://hdl.handle.net/11705/SEM/SEM024? >>>> >>>> That thumbnail has been generated using this filter. >>>> >>>> I can also test with your file directly if it's publicly available >>>> and/or if you feel comfortable with it. >>>> >>>> Abel >>>> >>>> El miércoles, 15 de noviembre de 2023 a las 20:56:55 UTC+1, Steli Vali >>>> escribió: >>>> >>>>> Hi Abel, >>>>> >>>>> the video is 20 seconds long and is .mp4 (I have recorded my screen on >>>>> a Windows Desktop) >>>>> Is the only video that I have tried. But it is strange that the error >>>>> tell that "No such file or directory". >>>>> For PDFs works fine, only for MP4 does throw this error. >>>>> The server on which DSpace is running is an Ubuntu 20.04. I can see >>>>> the /tmp/imthumb12321.tmp created, but I guess it breaks when it tries to >>>>> find "VIDEO:/tmp/imthumb12321.tmp[100]" - file. The code breaks exactly >>>>> when it tries to run the ops in the ImageMagickVideoThumbnail, when is >>>>> getting the thumbnail. >>>>> So my guess is that some op is breaking it. Maybe I am using a wrong >>>>> version of ImageMagick or other library and the >>>>> "VIDEO:/tmp/imthumb12321.tmp[100]" is not processed propery. Which >>>>> version >>>>> do you use on your system? >>>>> >>>>> Thank you >>>>> >>>>> Abel Gómez schrieb am Mittwoch, 15. November 2023 um 20:46:14 UTC+1: >>>>> >>>>>> Hi Steli, >>>>>> >>>>>> does it fail with any video? or only with a specific one? How long is >>>>>> that video? >>>>>> >>>>>> Did you try to use the ImageMagick PDF filter? Does it work? >>>>>> >>>>>> On a side note, can you provide info on the system you're using? >>>>>> >>>>>> Abel >>>>>> >>>>>> El miércoles, 15 de noviembre de 2023 a las 17:07:35 UTC+1, Steli >>>>>> Vali escribió: >>>>>> >>>>>>> Hi guys, >>>>>>> >>>>>>> after I followed the documentation on how to activate ImageMagick to >>>>>>> generate thumbnails for MP4-Videos, I get this error: >>>>>>> >>>>>>> org.im4java.core.CommandException: convert-im6.q16: unable to open >>>>>>> image `VIDEO:/tmp/imthumb1285171159781639618.tmp[100]': No such file or >>>>>>> directory @ error/blob.c/OpenBlob/2874 >>>>>>> >>>>>>> I am using: >>>>>>> DSpace 7.6 >>>>>>> ImageMagick 6.9.10-23 >>>>>>> MMPEG 4.2.7 >>>>>>> >>>>>>> Any help greatly appreciated. I already spent a day on this so I >>>>>>> hope that I will manage to solve it. Thank you. >>>>>>> >>>>>> -- All messages to this mailing list should adhere to the Code of Conduct: https://www.lyrasis.org/about/Pages/Code-of-Conduct.aspx --- You received this message because you are subscribed to the Google Groups "DSpace Technical Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to dspace-tech+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dspace-tech/5c137b84-e377-4027-bed9-03639708372dn%40googlegroups.com.
