NO video preview Creates thumbnails for videos.

[Harmen 1]

• After upgrading to 4.9.1.80, preview thumbnails cannot be generated. Previously, it was set up that a 10-second preview image would be automatically generated when adding the media library. However, after the upgrade, it failed to generate successfully. I hope to find a solution.

 

embyserver.txt embyserver-63896852388.txt hardware_detection-63896852393.txt

[Luke 42077]

HI there, can you please provide a specific example?

How to Report a Problem

Thanks !

 

[sa2000 674]

The log you attached shows you have library setting to store metadata with the media in the media folders but the permissions for the directories are not set to allow files to be written there

 

2025-10-23 21:38:13.024 Info QuickImageSeriesExtractor: ProcessRun 'quick-extract-imageseries' Execute: /app/emby/bin/ffmpeg -f mp4 -threads 1 -skip_interval 10 -i file:"/媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.mp4" -an -sn -vf "scale=w=320:h=180" -f image2 -b:v 100M "/config/cache/temp/98ab265c87ee42279badd55bde017136/img_%05d.jpg"

2025-10-23 21:39:16.515 Info QuickImageSeriesExtractor: ProcessRun 'quick-extract-imageseries' Process exited with code 0

2025-10-23 21:39:17.021 Info App: Deleting obsolete file /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100-320-10.bif

2025-10-23 21:39:17.236 Error App: Error creating thumbnails for /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.mp4

	System.UnauthorizedAccessException: 
	System.UnauthorizedAccessException: Access to the path '/媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100-320-10.bif' is denied.

	 ---> System.IO.IOException: Permission denied

	InnerException: System.IO.IOException: Permission denied

There is also an issue with nfo file

2025-10-23 21:39:17.383 Debug App: Saving nfo metadata for /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.mp4 to /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.nfo.

2025-10-23 21:39:17.418 Error App: Error reading existng nfo /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.nfo

	System.Xml.XmlException: System.Xml.XmlException: Name cannot begin with the '7' character, hexadecimal value 0x37. Line 46, position 4.

and a similar issue as the bif with permissions

2025-10-23 21:39:17.421 Error ProviderManager: Error in metadata saver
	System.UnauthorizedAccessException: System.UnauthorizedAccessException: Access to the path '/媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.nfo' is denied.
	 ---> System.IO.IOException: Permission denied

	InnerException: System.IO.IOException: Permission denied

 

[Harmen 1]

7小时前，SA2000 说：

您附加的日志显示您有库设置，用于将元数据与媒体一起存储在媒体文件夹中，但目录的权限未设置为允许将文件写入其中

 

2025-10-23 21:38:13.024 Info QuickImageSeriesExtractor: ProcessRun 'quick-extract-imageseries' Execute: /app/emby/bin/ffmpeg -f mp4 -threads 1 -skip_interval 10 -i file:"/媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.mp4" -an -sn -vf "scale=w=320:h=180" -f image2 -b:v 100M "/config/cache/temp/98ab265c87ee42279badd55bde017136/img_%05d.jpg"

2025-10-23 21:39:16.515 Info QuickImageSeriesExtractor: ProcessRun 'quick-extract-imageseries' Process exited with code 0

2025-10-23 21:39:17.021 Info App: Deleting obsolete file /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100-320-10.bif

2025-10-23 21:39:17.236 Error App: Error creating thumbnails for /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.mp4

	System.UnauthorizedAccessException: 
	System.UnauthorizedAccessException: Access to the path '/媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100-320-10.bif' is denied.

	 ---> System.IO.IOException: Permission denied

	InnerException: System.IO.IOException: Permission denied

nfo 文件也存在问题

2025-10-23 21:39:17.383 Debug App: Saving nfo metadata for /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.mp4 to /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.nfo.

2025-10-23 21:39:17.418 Error App: Error reading existng nfo /媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.nfo

	System.Xml.XmlException: System.Xml.XmlException: Name cannot begin with the '7' character, hexadecimal value 0x37. Line 46, position 4.

以及与具有权限的 BIF 类似的问题

2025-10-23 21:39:17.421 Error ProviderManager: Error in metadata saver
	System.UnauthorizedAccessException: System.UnauthorizedAccessException: Access to the path '/媒体库/艾薇/未知演员/NHDTC-100/NHDTC-100.nfo' is denied.
	 ---> System.IO.IOException: Permission denied

	InnerException: System.IO.IOException: Permission denied

 

May I ask how this can be solved? I deployed it with DOCKER. The environment added UID 0-uIG 0, as well as PUID 1000 and PGID 1000. Could it be a problem with the permissions I set? Thank you for your answer

Edited October 24, 2025 by Harmen

[sa2000 674]

8 hours ago, Harmen said:

May I ask how this can be solved? I deployed it with DOCKER. The environment added UID 0-uIG 0, as well as PUID 1000 and PGID 1000. Could it be a problem with the permissions I set? Thank you for your answer

Sorry - I have no experience of setting up permissions in a docker environment - will need someone else to help with this. My advice to everyone has always been to use the platform and the operating system that you know well and do not venture into linux unless you are an expert in that area 

 

[Luke 42077]

@Harmen did you figure this out?

[tedfroop21 86]

On 23/10/2025 at 20:29, Harmen said:

May I ask how this can be solved? I deployed it with DOCKER. The environment added UID 0-uIG 0, as well as PUID 1000 and PGID 1000. Could it be a problem with the permissions I set? Thank you for your answer

The program runs in Docker yes,  but your files are likely not in the container.

Dealing with permissions should be the same as in the guide, no matter where the program runs, the data files are usually kept separate.  As an example -  I use Flatpak (same idea as docker) Emby server is installed in Flatpak, which runs from the system drive.  I have two mounted system drives where my data is.  The permissions on those drives is set as described below.  

  Emby user still needs read and write permission.

 

[Harmen 1]

Thank you all for your replies. I have found the cause. It was a permission issue with my Docker deployment. It has now been resolved. Thank you!

[Luke 42077]

Thanks for following up !