Some (but not all) JPGs not displaying in Files/Gallery

[0nionboi]

Expected behaviour

Should be able to view preview of image in owncloud web.

Actual behaviour

Getting the default thumbnail, and image is unable to be previewed.
Page says “Error! Could not generate a preview of this image.”
Console in web browser reports 500 error

Server configuration

Operating system: Ubuntu 22.04

Web server: Apache/2.4.52

Database: 10.6.16-MariaDB-0ubuntu0.22.04.1

PHP version: PHP 7.4.33

ownCloud version: 10.14.0 (stable)

Updated from an older ownCloud or fresh install: Fresh Install

Where did you install ownCloud from: ownCloud site, following ownCloud docs

Signing status (ownCloud 9.0 and above):

Login as admin user into your ownCloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results into https://gist.github.com/ and puth the link here.

I did this - “No errors have been found.”

The content of config/config.php: I can post parts of this if necessary

**List of activated apps:**
Admin Config Report
Deleted Files
Share Files
Update Notification
Versions
Activity
Collaborative Tags & Management
Diagnostics
Gallery
Market
Notifications
PDF Viewer
Text Editor

Are you using external storage, if yes which one: local

Are you using encryption: no

Are you using an external user-backend, if yes which one: no

Client configuration

Browser: firefox/edge

Operating system: win 11

Logs

Web server error log

I coudn’t find relevant logs in the log file, maybe i’m not looking for the right thing

[alfredb]

Not sure, but if I’m looking at your file list, I’d say it’s your file naming.

[0nionboi]

I thought so too, so I played around with the names a bit. Even when I take one of the broken files, and upload it with a very normal name like testfile.jpg, it still doesn’t work.

I’ve been examining the metadata of the files to see if it has something to do with a particular attribute but haven’t found anything that’s the same across all the non-functioning images.

[Bezaliel]

I have the same problem. I can’t find important diffrence between “broken jpeg” and this which show on Media Viewer(exported jpeg from Lightroom application on the same settings). App Gallery can’t load this file either( i know is depricated but still…).

[tom42]

Hey,

could this be related to this?

Not showing pictures with > 4K pixel vertical resolution

After uploading portrait oriented pictures from my smartphone with 4032 pixel vertical resolution, neither thumbnails are shown in the file explorer, nor these images can be viewed in gallery or image viewer. Scaling the image down to 4000 pixel or less vertical resolution, ownCloud works as expected. Since I could not see anything suspicious in owncloud.log, is this a known bug or can maximum vertical resolution somehow be configured? Thx Andreas

[PiotrSchmidt]

The indicated help does not provide a solution.
Photos larger than 4000 pixels vertically do not show thumbnails.
But maybe this only applies to .jpg files? Because RAW “.cr2” photos with a size of over 4000 pixels vertically display correctly!