I’m running the latest 43 plasma edition, for whatever reason I just can’t get the thumbnails to generate for mp4 and flac files. They did actually work like a week ago, but does not now. I have tried pretty much everything I could, like:
clearing the thumbnail cache
making sure I have the RPM fusion version of ffmpeg
reinstalling ffmpegthumbs and kio-extras
ensuring that preview are actually enabled in dolphin, especially checking about the F12 shortcut state.
running kbuildsycoca6 --noincremental
don’t know what has actually gone wrong here. the flac files do have embedded thumbnails, for the mp4 files a thumbnail should be getting generated, which isn’t in my case.
Before switching to plasma, I was running gnome and it was totem which was managing the thumbnail creation for both these file formats, installing that does not help either.
So, I created a new folder, moved the same mp4 files and that actually fixed the thumbnail creation issue. Weird that the same file in the previous folder still does not have a thumbnail, even after clearing the cache.
As for the flacs, I tried to manually test thumbnail generation for a file with:
Directly calling /usr/lib64/qt6/plugins/kf6/thumbcreator/audiothumbnail.so as it is also results in a segmentation fault, so I don’t know if the plugin is actually buggy.
For flac, turns out it was totem-video-thumbnailer from my previous gnome usage conflicting with kde’s thumbnailers. Uninstalling that fixed the issue for flac files, however it still remains the same for mp4 files.
thumbnails are actually getting generated for the folders, but not for the files inside them. If I move a single mp4 file to a new folder, this seems to be fixed but only for that specific file, adding any new mp4 files to the folder won’t work.
Is there any crucial package that I’m missing in my converted install?
mp4 thumbnails are showing up on thunar, so this definitely seems like a dolphin issue.
Can anybody who is running the KDE Plasma edition please verify if they are getting thumbnails generated for mp4 files? I just want to check, if this is a problem with my install or an actual bug.
Yes, I do get thumbnails for every file type I have, so I wonder if something is wrong in Dolphin.
I’m sure you have, but could you check one thing:
In Configure Dolphin, select on the left the top item Interface and then on the right the TAB Previews. The last item in the list Video files (ffmpegthumbs), is this item marked? When I untick it the thumbnails are gone and I see the default MPV4 icon.
It is indeed already marked, disabling and enabling it again doesn’t do much either. I’m thinking about doing a reinstall, but it seems a bit too much for just a simple thumbnails issue.
Yeah, I can’t find anything using Google. About the only thing to do would be to suggest deleting the thumbnail cache but my guess is that won’t do anything either.