Getting Thumbnailer to work in Linux Manjaro KDE

[deruji]

Hi, I'm trying to get TVPaint's thumbnailer to work in Linux Manjaro KDE so that thumbnails display in Dolphin.
If someone more knowledgeable could help if something's missing or say if it's impossible to implement, that would be great.
I tried looking at similar configuration files and adjusted paths where needed. Although I can get the entry to display as an option, no thumbnails are being generated or displayed in Dolphin.

I modified .thumbnailer file to be in line with others of the same type
"tvp-animation-11.5-pro.thumbnailer"

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[Thumbnailer Entry]
TryExec=/usr/bin/tvp-animation-11.5-pro-thumbnailer
Exec=/usr/bin/tvp-animation-11.5-pro-thumbnailer %s %i %o
MimeType=application/tvp-project;application/tvpaint-project;application/mirage-project;application/aura-project;application/dip-file;application/deep-file;

I created a .desktop file that goes in /kservices5
"tvpaintthumbnail.desktop"

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[Desktop Entry]
Type=Service
Name=TVPaint files
X-KDE-ServiceTypes=ThumbCreator
MimeType=application/tvp-project;application/tvpaint-project;application/mirage-project;application/aura-project;application/dip-file;application/deep-file;
X-KDE-Library=tvpaintthumbnail
CacheThumbnail=true

The .desktop file is recognized by Dolphin and I can select it for previews.

Screenshot_20220908_141114.png (57.35 KiB) Viewed 1908 times

It writes "tvpaintthumbnail" into the [PreviewSettings] section of Dolphin's config file "dolphinrc", but that's the only effect I've managed to get so far.

[Xavier]

First guess : I'd think that you need first to create a MIME type for the *.tvpp extension :

https://userbase.kde.org/System_Setting ... iations/en

[deruji]

Thank you for the suggestion. The MIME types are already made as far as I can tell and filled with a wide variety of associations.
Would any specific MIME types need to be included in the .thumbnailer and .desktop files?
I don't know what internal file types are used to store the frames, if that is what the thumbnailer is looking for.

Screenshot_20220909_172550.png (66.92 KiB) Viewed 1840 times

Screenshot_20220909_172618.png (81.37 KiB) Viewed 1840 times

[Xavier]

Ok, sorry it took me a little time to get into it: though I've been on Linux for ages, I'm not well aware of how thumbnails work !

There is an interesting discussion there : https://forum.kde.org/viewtopic.php?t=49010
So I think that if you have different versions installed you'd need first to query which version of TVPaint actually generates the preview of the *.tvp files. Try this in a command line:

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xdg-mime query default application/tvp-project

As for me, I use XFCE and the thumbnails do show in Thunar (the XFCE file explorer).

Capture d’écran_2022-09-12_13-29-25.png (73.26 KiB) Viewed 1795 times

On KDE it should possible too, without changing the TVPaint desktop files. Did you install the "kde-thumbnailer" package ?

[deruji]

Hi, using the command:

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xdg-mime query default application/tvp-project

gives me:

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tvp-animation-11.5-pro.desktop

I assume that should be the correct value.

The KDE-thumbnail packages are all installed, Dolphin generates thumbnails for all other image formats.

I tried installing a different file manager "PCmanFM" to see if the problem was also there. It directly accesses thumbnailers set in "/usr/share/thumbnailers".
It was able to generate thumbnails, so I can at least confirm that the thumbnailer itself is working in Manjaro. The problem seems to be in how Dolphin is accessing/not accessing TVPaint's thumbnailer.

Screenshot_20220913_155743.png (94.96 KiB) Viewed 1767 times

[deruji]

I also found someone with a similar problem. It looks like Dolphin or KDE require a specific plugin.
https://forum.freecadweb.org/viewtopic. ... 5&p=589564