[Bug]: Previews of HDR videos being generated are washed out (needs tonemap?) #44881
Description
⚠️ This issue respects the following points: ⚠️
- This is a bug, not a question or a configuration/webserver/proxy issue.
- This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
- Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
- I agree to follow Nextcloud's Code of Conduct.
Bug description
Recently I switched on the HDR10+ setting for recording videos on my Samsung GS23+ and now previews being generated in NC looked washed out. (See still images attached of the generated preview versus a screenshot from the video being played.) From my understanding of HDR, this might be a result of needing to tonemap with some additional switches passed to FFMPEG?
NC generated preview:
Screenshot out of original video:
Steps to reproduce
- Record video on a device using HDR
- Upload the video to NC
- Perform any function that causes NC to generate a preview of the HDR video
Expected behavior
The preview/thumbnail shouldn't be washed out.
Installation method
Community Manual installation with Archive
Nextcloud Server version
28
Operating system
Other
PHP engine version
PHP 8.2
Web server
Nginx
Database engine version
MariaDB
Is this bug present after an update or on a fresh install?
None
Are you using the Nextcloud Server Encryption module?
None
What user-backends are you using?
- Default user-backend (database)
- LDAP/ Active Directory
- SSO - SAML
- Other
Configuration report
{
"system": {
"apps_paths": [
{
"path": "\/usr\/local\/www\/nextcloud\/apps",
"url": "\/apps",
"writable": true
}
],
"defaultapp": "memories",
"logfile": "\/var\/log\/nextcloud\/nextcloud.log",
"loglevel": 2,
"memcache.local": "\\OC\\Memcache\\APCu",
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 0
},
"filelocking.enabled": true,
"trusted_domains": [
"localhost",
"192.168.0.12",
"nextcloud.MYDOMAIN.com"
],
"default_phone_region": "US",
"enable_previews": true,
"preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
"preview_format": "jpeg",
"enabledPreviewProviders": [
"OC\\Preview\\Imaginary",
"OC\\Preview\\MKV",
"OC\\Preview\\MP3",
"OC\\Preview\\MP4",
"OC\\Preview\\AVI",
"OC\\Preview\\Movie"
],
"cropimagepreviews": "0",
"preview_max_x": 2048,
"preview_max_y": 2048,
"jpeg_quality": "60",
"logtimezone": "America\/New_York",
"installed": true,
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"version": "28.0.4.1",
"updater.release.channel": "stable",
"overwrite.cli.url": "https:\/\/nextcloud.MYDOMAIN.com",
"dbtype": "mysql",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtpsecure": "ssl",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtpauthtype": "LOGIN",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "465",
"maintenance": false,
"trashbin_retention_obligation": "30,31",
"theme": "",
"app_install_overwrite": [
"customproperties"
],
"memories.vod.path": "\/usr\/local\/www\/nextcloud\/apps\/memories\/bin-ext\/go-vod-amd64",
"memories.vod.ffmpeg": "\/usr\/local\/bin\/ffmpeg",
"memories.vod.ffprobe": "\/usr\/local\/bin\/ffprobe",
"memories.exiftool": "\/usr\/local\/bin\/exiftool",
"data-fingerprint": "cf5cf1b31d5af06404c30a5805d00eda",
"mail_smtpauth": 1,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"memories.exiftool_no_local": true,
"memories.vod.external": true,
"maintenance_window_start": 8,
"updater.secret": "***REMOVED SENSITIVE VALUE***",
"memories.db.triggers.fcu": true
}
}List of activated Apps
Enabled:
- activity: 2.20.0
- admin_audit: 1.18.0
- bruteforcesettings: 2.8.0
- cloud_federation_api: 1.11.0
- dav: 1.29.1
- federatedfilesharing: 1.18.0
- files: 2.0.0
- files_external: 1.20.0
- files_pdfviewer: 2.9.0
- files_reminders: 1.1.0
- files_sharing: 1.20.0
- files_trashbin: 1.18.0
- logreader: 2.13.0
- lookup_server_connector: 1.16.0
- memories: 7.2.0
- notifications: 2.16.0
- oauth2: 1.16.3
- password_policy: 1.18.0
- photos: 2.4.0
- previewgenerator: 5.5.0
- privacy: 1.12.0
- provisioning_api: 1.18.0
- serverinfo: 1.18.0
- settings: 1.10.1
- sharebymail: 1.18.0
- survey_client: 1.16.0
- theming: 2.3.0
- twofactor_admin: 4.5.0
- twofactor_backupcodes: 1.17.0
- twofactor_totp: 10.0.0-beta.2
- updatenotification: 1.18.0
- viewer: 2.2.0
- workflowengine: 2.10.0
Disabled:
- circles: 28.0.0 (installed 22.1.1)
- comments: 1.18.0 (installed 1.10.0)
- contactsinteraction: 1.9.0 (installed 1.1.0)
- dashboard: 7.8.0 (installed 7.0.0)
- encryption: 2.16.0
- federation: 1.18.0 (installed 1.10.1)
- files_versions: 1.21.0 (installed 1.13.0)
- firstrunwizard: 2.17.0 (installed 2.13.0)
- nextcloud_announcements: 1.17.0 (installed 1.9.0)
- recommendations: 2.0.0 (installed 1.3.0)
- related_resources: 1.3.0 (installed 1.3.0)
- support: 1.11.1 (installed 1.3.0)
- suspicious_login: 6.0.0 (installed 4.3.0)
- systemtags: 1.18.0 (installed 1.10.0)
- text: 3.9.1 (installed 3.5.1)
- user_ldap: 1.19.0
- user_status: 1.8.1 (installed 1.0.1)
- weather_status: 1.8.0 (installed 1.0.0)Nextcloud Signing status
No errors have been found.Nextcloud Logs
N/AAdditional info
I'm not sure if this should be considered a bug or enhancement. On the one hand, preview images are being generated but on the other hand, they're not being generated accurately to reflect the video.