this post was submitted on 14 Mar 2025
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Often videos I took from my phone don't have a thumbnail on my computer. How to track that down? (lemmy.world)
submitted 1 month ago* (last edited 4 weeks ago) by a_new_sad_me@lemmy.world to c/linux@lemmy.ml
11 comments fedilink hide all child comments
 

I have a Samsung phone and I use the default camera to take videos. Then, in my home wifi, I transfer the files to my server using syncthing. The folders where these files are stored is then mounted on a different computer via lan (my main machine). The videos on that machine don't always have thumbnails and I'm not sure why. How can I track that down? At what stage should the thumbnail be generated?

Technical information (based on questions that I am asked):

  • The files are mp4
  • I'm using kubuntu 24.10
  • I'm using Dolphine file browser

Solution
On dolphin go to settings -> preview -> file size for remote storage.

all 12 comments
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[–] mactan@lemmy.ml 10 points 1 month ago (1 children)

dumb dolphin thing I forget every couple years, F12 toggles thumbnails on and off

[–] meekah@lemmy.world 3 points 1 month ago

omg thanks for this

[–] schnurrito@discuss.tchncs.de 5 points 1 month ago

These settings don't do what you want?

[–] liliumstar@lemmy.dbzer0.com 5 points 1 month ago (1 children)

In this scenario, the thumbnails are going to be generated when you browse the directory. Probably what network filesystem you're using. Alternately, maybe there is a maximum file size on previews? I know dolphin has that option.

[–] 0x0f@lemmy.blahaj.zone 1 points 1 month ago* (last edited 1 month ago) (1 children)

Alternately, maybe there is a maximum file size on previews?

it's likely this, the mp4s don't have thumbnail embedded and dolphin is skipping the big ones

[–] a_new_sad_me@lemmy.world 3 points 4 weeks ago

Yes! This is it. Thank you!

[–] catloaf@lemm.ee 1 points 1 month ago (1 children)

What format are the files? What are you using to view the thumbnails?

[–] a_new_sad_me@lemmy.world 3 points 1 month ago

Important questions, I've added this to my original post:

  • The files are mp4
  • I’m using kubuntu 24.10
  • I’m using Dolphine file browser
[–] marl_karx@lemmygrad.ml 1 points 1 month ago (1 children)

try installing ffmpegthumbnailer and see if that works after reboot / relogin, if not uninstall and try another method

[–] marl_karx@lemmygrad.ml 1 points 1 month ago

i only ever used arch linux idk how other distributions handle it

[–] just_another_person@lemmy.world 1 points 1 month ago

Do a test: copy a bunch of videos directly from your phone to a test folder separate from the current one you use. See if all of the files get thumbnails.