Resolume Forum

Hi!
I'm new to resolume development, I wonder if I'm missing something.
I some cases, I drop a clip into a cell, and reso doesn't seem to generate a thumbnail for it, is there a way to force resolume to regenerate thumbnails or is there any rules re thumbnails?

EDIT: I found with trail and error, if i swithc decks for like 300ms and back it regrenrates thumbnails, but there must be a more graceful way to do this..

Thanks.

Thumbnail generation can take a bit if you load a bunch of files at once.

Do you see this happening with one file dropped at a time too?

Yes, i dont see thumb. generation even with one file.

Zoltán wrote: Thu Jan 22, 2026 12:48 Thumbnail generation can take a bit if you load a bunch of files at once.

Do you see this happening with one file dropped at a time too?

can you share such a file with us on mail@resolume.com?

Speaking of thumbnails... is there a specific (correct) size to use for effects/sources/clips?

I like to customize them, but I can never get the size right.

Hi!
I'll try to explain it better. resolume itself shows thumbnails fine. its the webserver which doesnt.
ie. when i drop a clip on a resolume cell, reso shows the thumb instantly, but when i switch to the webserver example (see attached ss, top: resolume, btm: webserver) it doesnt show the thumbnails. to fix this i need to swithc to another deck and back to the deck i was in and sometimes this will show the thumbnails. its a webserver bug or glitch and i'm looking for a way to solve this..

Zoltán wrote: Thu Jan 22, 2026 20:11 can you share such a file with us on mail@resolume.com?

API thumbnails will be fixed in the next release.

samirbridi wrote: Fri Jan 23, 2026 03:47 Speaking of thumbnails... is there a specific (correct) size to use for effects/sources/clips?
I like to customize them, but I can never get the size right.

Try hitting command (control) + Shift + T with the clips selected to update the thumbnails, the generated image should look like how the clip will play in the composition.

Oh! thank you! so its not me whos crazy
Any clue re the release date?

Zoltán wrote: Fri Jan 23, 2026 13:08 API thumbnails will be fixed in the next release.