[SOLVED] No thumbnails for mp3

[dentex]

Hello,
I noticed that since some time no mp3 thumbnails (usually based on the album cover) are being generated in nemo.

System details:

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  Kernel: 5.15.0-69-generic x86_64 bits: 64 compiler: gcc v: 11.3.0
    Desktop: Cinnamon 5.6.8 tk: GTK 3.24.33 wm: muffin vt: 7 dm: LightDM 1.30.0
    Distro: Linux Mint 21.1 Vera base: Ubuntu 22.04 jammy

In `~/.cache/thumbnails` I have a bunch of single pixel images, probably all failed generation from folders containing MP3s:

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 ~ $ tree -lh ~/.cache/thumbnails
[4.0K]  /home/USER/.cache/thumbnails
├── [4.0K]  fail
│   └── [4.0K]  gnome-thumbnail-factory
│       ├── [ 287]  0b7a16448865d14a7587de893155194b.png
│       ├── [ 315]  1d7f3060278ef573ee24cd08247edaa9.png
│       ├── [ 271]  37a9b7306c920fa6c1b313add1be3a45.png
│       ├── [ 284]  3eb31dacb724b4e795fb2e7a4e3709a1.png

[...]

There is no `gnome-thumbnail-factory` binary on this machine, neither I see anything in the official repos.

How to debug this issue?

Thanks

[Jymm]

I don't know if this will help you but I have the same problem on many of my installation of Mate caja (but not on Mint).
I then install Thunar, which always shows the thumbmails, and after thunar shows them they show in Mate's caja.
This has worked on every Mate installation except Parrot, and I believe it didn't work there because Parrot sandboxes applications.
So you could give installing Thunar a try.

my installed thumbnail software from Synapitc:

[dentex]

So the missing piece might be a thunar's dependency... Let me take a look.
Thanks for the input.

EDIT: no luck... thunar depends on "tumbler", and it seemed a good candidate to try (I also installed "tumbler-plugins-extra") ... but still no thumbnails for mp3s.

EDIT2: installed thunar... Nemo now displays thumbs BUT only for folders already visited by thunar... not optimal

[dentex]

This issue might be partially solved adding audio/mpeg to /usr/share/thumbnailers/ffmpegthumbnailer.thumbnailer...
but then mp3 thumbs have the "film" effect at the sides of the preview... again, not optimal.

EDIT: finally SOLVED by doing:

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cp /usr/share/thumbnailers/xapp-mp3-thumbnailer.thumbnailer ~/.local/share/thumbnailers/

Not sure why. Permissions seemed to be OK.