Hello,
please help me, recently I got pretty big pictures and the OC server is not generating thumbnails and previews. In case of smaller pictures, there is no problem.
Image info (one of many):
root@webhost1:/tmp# identify 20250713-081717-ZD.JPG
20250713-081717-ZD.JPG JPEG 7008x4672 7008x4672+0+0 8-bit sRGB 23.8924MiB 0.030u 0:00.166
I tried to increase config parameters, but still no success:
“enable_previews”: true,
“previewJPEGImageDisplayQuality”: “25”,
“preview_max_x”: “10000”,
“preview_max_y”: “10000”,
“preview_max_filesize_image”: “-1”,
“preview_max_scale_factor”: “10”,
“preview_max_dimensions”: “10000x10000”
Tried to increase the IM policy: /etc/ImageMagick-6/policy.xml
From:
policy domain=“resource” name=“memory” value=“256MiB”
policy domain=“resource” name=“map” value=“512MiB”
policy domain=“resource” name=“area” value=“128MP”
To:
policy domain=“resource” name=“memory” value=“1024MiB”
policy domain=“resource” name=“map” value=“2048MiB”
policy domain=“resource” name=“area” value=“256MP”
Interestingly, the IM CLI convert the image without problem:
convert 20250713-081717-ZD.JPG -quality 60 output2.jpg -verbose
PHP Memory limit is increased also from 256MB to 512MB (its a ~small picture archive server):
memory_limit = 512M
Steps to reproduce
- Upload any picture taken by my friend with his Sony camera.
Expected behaviour
After upload Thumbnails/previews generated
Actual behaviour
The upload completes, the files can be downloaded, but the thumbnails are not generated, so only stock image icon is visible.
“Could not generate a preview of this file. Please go to the next slide while we remove this image from the slideshow”
Server configuration
Operating system: Debian GNU/Linux 11 (bullseye)
Web server: apache2 2.4.62-1~deb11u2
root@webhost1:/var/www/owncloud# dpkg -l | grep apache
ii apache2 2.4.62-1~deb11u2 amd64 Apache HTTP Server
Database:
root@webhost1:/tmp# dpkg -l | grep mariadb-server
ii mariadb-server 1:10.5.29-0+deb11u1 all MariaDB database server (metapackage depending on the latest version)
PHP version:
root@webhost1:/tmp# dpkg -l | grep php7.4
ii libapache2-mod-php7.4 7.4.33-1+deb11u8 amd64 server-side, HTML-embedded scripting language (Apache 2 module)
ii php7.4 7.4.33-1+deb11u8 all server-side, HTML-embedded scripting language (metapackage)
root@webhost1:/var/www/owncloud# php -v
PHP 7.4.33 (cli) (built: Mar 19 2025 19:57:26) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.33, Copyright (c), by Zend Technologies
ownCloud version: (see ownCloud admin page)
Verzió
ownCloud 10.15.2 (stable)
Updated from an older ownCloud or fresh install:
older
Where did you install ownCloud from:
The system was installed around ~ 2017.07, it was Debian 9 system in the first place and OC was version 10.0.1 or 10.0.2
Signing status (ownCloud 9.0 and above):
No errors have been found.
The content of config/config.php:
root@webhost1:/var/www/owncloud# sudo -u www-data php occ config:list system
{
“system”: {
“trusted_proxies”: [
“192.168.70.10”
],
“updatechecker”: false,
“instanceid”: “oc287a8k0f6z”,
“passwordsalt”: “REMOVED SENSITIVE VALUE”,
“secret”: “REMOVED SENSITIVE VALUE”,
“trusted_domains”: [
“192.168.70.4”,
“REMOVED SENSITIVE VALUE”
],
“datadirectory”: “/var/oc_data”,
“overwrite.cli.url”: “http://192.168.70.4/owncloud”,
“dbtype”: “mysql”,
“version”: “10.15.2.0”,
“dbname”: “owncloud_db”,
“dbhost”: “127.0.0.1”,
“dbtableprefix”: “oc_”,
“dbuser”: “REMOVED SENSITIVE VALUE”,
“dbpassword”: “REMOVED SENSITIVE VALUE”,
“logtimezone”: “Europe/Berlin”,
“installed”: true,
“maintenance”: false,
“loglevel”: 0,
“theme”: “”,
“files_antivirus.av_cmd_options”: “”,
“files_antivirus.av_path”: “”,
“allow_user_to_change_mail_address”: “”,
“remember_login_cookie_lifetime”: 1296000,
“session_lifetime”: 1200,
“session_keepalive”: true,
“http.cookie.samesite”: “Strict”,
“trashbin_retention_obligation”: “auto”,
“trashbin_purge_limit”: 50,
“operation.mode”: “single-instance”,
“log_type”: “owncloud”,
“logfile”: “/var/oc_data/owncloud.log”,
“syslog_tag”: “ownCloud”,
“log.syslog.format”: “[%reqId%][%remoteAddr%][%user%][%app%][%method%][%url%] %message%”,
“log_rotate_size”: 104857600,
“enable_previews”: true,
“previewJPEGImageDisplayQuality”: “25”,
“enabledPreviewProviders”: [
“OC\Preview\SGI”,
“OC\Preview\Heic”,
“OC\Preview\BMP”,
“OC\Preview\GIF”,
“OC\Preview\JPEG”,
“OC\Preview\MarkDown”,
“OC\Preview\MP3”,
“OC\Preview\PNG”,
“OC\Preview\TXT”,
“OC\Preview\XBitmap”
],
“filelocking.enabled”: true,
“filelocking.ttl”: 3600,
“debug”: true,
“preview_max_x”: “10000”,
“preview_max_y”: “10000”,
“preview_max_filesize_image”: “-1”,
“preview_max_scale_factor”: “10”,
“preview_max_dimensions”: “10000x10000”
}
}
List of activated apps:
root@webhost1.:/var/www/owncloud# sudo -u www-data php occ app:list
Enabled:
- activity:
- Version: 2.7.2
- Path: /var/www/owncloud/apps/activity
- comments:
- Version: 0.3.0
- Path: /var/www/owncloud/apps/comments
- configreport:
- Version: 0.3.0
- Path: /var/www/owncloud/apps/configreport
- dav:
- Version: 0.7.0
- Path: /var/www/owncloud/apps/dav
- diagnostics:
- Version: 0.2.1
- Path: /var/www/owncloud/apps/diagnostics
- federatedfilesharing:
- Version: 0.5.0
- Path: /var/www/owncloud/apps/federatedfilesharing
- federation:
- Version: 0.1.0
- Path: /var/www/owncloud/apps/federation
- files:
- Version: 1.6.0
- Path: /var/www/owncloud/apps/files
- files_antivirus:
- Version: 1.2.2
- Path: /var/www/owncloud/apps/files_antivirus
- files_pdfviewer:
- Version: 1.0.2
- Path: /var/www/owncloud/apps/files_pdfviewer
- files_sharing:
- Version: 0.14.0
- Path: /var/www/owncloud/apps/files_sharing
- files_texteditor:
- Version: 2.6.1
- Path: /var/www/owncloud/apps/files_texteditor
- files_trashbin:
- Version: 0.9.1
- Path: /var/www/owncloud/apps/files_trashbin
- files_versions:
- Version: 1.3.0
- Path: /var/www/owncloud/apps/files_versions
- firstrunwizard:
- Version: 1.3.0
- Path: /var/www/owncloud/apps/firstrunwizard
- gallery:
- Version: 16.1.2
- Path: /var/www/owncloud/apps/gallery
- market:
- Version: 0.9.0
- Path: /var/www/owncloud/apps/market
- notifications:
- Version: 0.6.0
- Path: /var/www/owncloud/apps/notifications
- provisioning_api:
- Version: 0.5.0
- Path: /var/www/owncloud/apps/provisioning_api
- systemtags:
- Version: 0.3.0
- Path: /var/www/owncloud/apps/systemtags
- updatenotification:
- Version: 0.2.1
- Path: /var/www/owncloud/apps/updatenotification
Are you using external storage, if yes which one: local/smb/sftp/…
No
Are you using encryption:
No
Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/…
No.
Client configuration
Browser:
Firefox 128.13.0esr (64-bit)
Operating system:
Windows 10 Enterprise 22H2
Logs
Web server error log
No Error in the logs.
ownCloud log (data/owncloud.log)
There is no error in the logs.
Browser log
HTTP/1.1 404 Not Found
Date: Mon, 28 Jul 2025 10:26:15 GMT
Server: Apache/2.4.62 (Debian)
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Content-Type-Options: nosniff
X-XSS-Protection: 0
X-Robots-Tag: none
X-Frame-Options: SAMEORIGIN
X-Download-Options: noopen
X-Permitted-Cross-Domain-Policies: none
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Set-Cookie: oc_sessionPassphrase=ngMHkoU5XFiF7r75R1%2BMy2ylWd692h01hXyLXdvvKn%2FqZdaIqdro1aHO9xGfOQ5svKb%2FaEmxta183SFV53NeNHQX%2BYmOrIf6Lhk%2FMpzgJTky11Tb%2B82TVnGBdLTe%2BvJ8; expires=Mon, 28-Jul-2025 10:46:15 GMT; Max-Age=1200; path=/; HttpOnly; SameSite=Strict
Content-Security-Policy: default-src ‘self’; img-src ‘self’; style-src ‘self’ ‘unsafe-inline’; font-src ‘self’;
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive
Transfer-Encoding: chunked
What am I missing?
Thanks!
