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Update to 4.9, why does everything gets rescanned?


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darkside40
Posted

Simple question: why is a complete rescan necessary after the Update from latest 4.8.11 to 4.9.3?

Now my Library looks like this, the protocol is full of Network errors, and rescanning will take ages. Is there a way to aviad this?

image.thumb.png.57be9e69a0247e21424d1de89ccb9cae.png

darkside40
Posted

Okay my Movie Folder got scanned. On 4.8 i had 6043 Element, now i have 6000. Where did the 43 vanished?

Neminem
Posted

Guess only logs will show 🤷‍♂️

 

darkside40
Posted

Whats strange is: when ic go into the Folder View Emby sees the correct number of elements, but if i go into the Movie view there are 43 less.

darkside40
Posted

Okay seems that Emby just recognized files as duplicates for what reason whatever. In most of the cases i dont see any sense in that.

I hope that i fixed that now.

Posted

Thanks for following up.

darkside40
Posted

@Lukehow does Emby qualify things as duplicate? In my case that seemed to be extremely buggy so it would be good to know the mechanics behind that.

Posted
18 hours ago, darkside40 said:

@Lukehow does Emby qualify things as duplicate? In my case that seemed to be extremely buggy so it would be good to know the mechanics behind that.

They are duplicates if they are merged together as multi-version.

darkside40
Posted

Sorry but this cant be. I had 11 duplicates in one Movie. All of this duplicates had their own folder in which they were in and they were proper identified.

What i have seen was that the files all hat the same filestamp when they were added, but thats it.

So how does this automatic works in detail?

Posted

Are you asking about the filter or are you now asking about the automatic grouping feature?

darkside40
Posted

About the automatic grouping

Posted
On 1/21/2026 at 1:33 AM, darkside40 said:

About the automatic grouping

HI there, can you please provide a specific example?

How to Report a Problem

Thanks !

 

darkside40
Posted

No because i resolved all the problema manually. Thats why i ask you to tell me how this grouping feature works. I mean you can have a glimpse int the sourcecode.

Does it use timestamp of files, any hashed etc? There must be some mechanic behind it and it must be more complex than: group all video files in one folder.

In my case all the Video Files were in seperate folders.

Posted
On 1/27/2026 at 3:58 AM, darkside40 said:

No because i resolved all the problema manually. Thats why i ask you to tell me how this grouping feature works. I mean you can have a glimpse int the sourcecode.

Does it use timestamp of files, any hashed etc? There must be some mechanic behind it and it must be more complex than: group all video files in one folder.

In my case all the Video Files were in seperate folders.

Well it depends on which grouping options are enabled. There's grouping based on file naming conventions, and then there's grouping based on external ids (tmdb, tvdb, etc). And both can be enabled at once.

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