Thumbs not refreshing

Plex Media Server NAS & Devices
1

Hi,

How can I force Plex to rebuild my video thumbs/preview pics ?
I have a library with many missing (let’s say 80%) thumbs preview missing (even if file is shown in plex and readable).
Have tried scan, reset metadata, remove/add the library with a new parent folder name, empty trash etc.

Thumbs I’m speaking about are the ones build from the original media.

Thanks if you have any tricks to share.

PMS running on a Synology DS418+ (last PMS version available).
Note that this was working in the past, I have lost my media folder (human error), and I have restored the media folder from an old HDD using a recovery tool. May be it’s linked to my situation, so I share the info.

2

Since making these preview thumbs is very hard on your server CPU, you might have disabled them.
see https://support.plex.tv/articles/202197528-video-preview-thumbnails/

3

Thanks for your answer, I understand, but this is what I would like to have :slight_smile:

I have tones of media in many libraries and I have never had any issue.
So this is not a problem for my end to know that is supposed to be “very hard” for my CPU as this never takes more than a few minutes…

4

Please verify that they are still activated. Both under Settings - Library and in the properties of each video library.

5

Can you be more accurate on what I am supposed to check please ?
(i’m here but I’m french lol)

6

Please follow the link I’ve set for you above.

7

I had a look to your link: not really sure we are speaking about the same thing.
I’m not speaking about “Video preview thumbnails” but the “covers” for each media file.

8

Apologies, then I misunderstood.

What happens when you pick one movie or one tv show and ‘Refresh Metadata’?
(wait a few minutes before re-entering the preplay page of this item)

9

Already tested. It works and I can see each files are scanned, but the one with no cover stay with no cover (and the ones with cover keep their cover active).

10

You mean the actual media were lost
or
was also the Plex data folder lost?

Could you share the contents of the Plex XML info of one affected movie, please?

11

Nothing lost but the image regarding the cover

cxMClK.png1130×394 259 KB

It was working before.
See end of my first post of the current thread.

12

Sorry, that was not what I was asking for.

13

Are you looking for this ?

#### Média

* Video Resolution 1080p
* Durée 41:52
* Débit 12417 kbps
* Width 1920
* Height 1080
* Aspect Ratio 1.78
* Container MP4
* Video Frame Rate NTSC
* Web Optimized Oui
* Audio Profile lc
* Video Profile high

#### Partie

* Durée 41:52
* File_MyMedia01.mp4
* Size 3.63 GB
* Audio Profile lc
* Container MP4
* Web Optimized Oui
* Video Profile high

* Codec H264
* Débit 12288 kbps
* Bit Depth 8
* Chroma Location left
* Chroma Subsampling 4:2:0
* Color Primaries bt709
* Color Range tv
* Color Space bt709
* Color Trc bt709
* Frame Rate 29.97 fps
* Height 1080
* Niveau 4.1
* Profile high
* Ref Frames 3
* Stream Identifier 1
* Width 1920
* Display Title 1080p (H.264)

* Codec AAC
* Chaînes 2
* Débit 130 kbps
* Audio Channel Layout stereo
* Profile lc
* Sampling Rate 48000 Hz
* Stream Identifier 2
* Display Title Inconnu (AAC Stereo)
14

No, I am looking for the Plex XML info
please follow the link.

15

Sorry.

like this ? :sweat_smile:

<MediaContainer size="1" allowSync="1" identifier="com.plexapp.plugins.library" librarySectionID="56" librarySectionTitle="PlexFolderName" librarySectionUUID="95f8bdab-124b-43f3-9832-fc7ca43c9351" mediaTagPrefix="/system/bundle/media/flags/" mediaTagVersion="1544817990">
<Video ratingKey="13628" key="/library/metadata/13628" guid="com.plexapp.agents.none://383270645cd497436f0b6b606de3afe4b927eef8?lang=xn" librarySectionTitle="MyFilms" librarySectionID="56" librarySectionKey="/library/sections/56" type="movie" title="_MYFILE01" summary="" year="2019" duration="2171113" originallyAvailableAt="2019-01-26" addedAt="1548495392" updatedAt="1548772761" createdAtAccuracy="epoch,local" createdAtTZOffset="0">
<Media videoResolution="1080" id="14792" duration="2171113" bitrate="12419" width="1920" height="1080" aspectRatio="1.78" audioChannels="2" audioCodec="aac" videoCodec="h264" container="mp4" videoFrameRate="NTSC" optimizedForStreaming="1" audioProfile="lc" has64bitOffsets="0" videoProfile="high">
<Part accessible="1" exists="1" id="15836" key="/library/parts/15836/1548495392/file.mp4" duration="2171113" file="/volume1/MYHDD/SUBFOLDER/ITEM/CAT/_MYFILM01.mp4" size="3370467790" audioProfile="lc" container="mp4" has64bitOffsets="0" optimizedForStreaming="1" videoProfile="high">
<Stream id="32096" streamType="1" default="1" codec="h264" index="0" bitrate="12289" bitDepth="8" chromaLocation="left" chromaSubsampling="4:2:0" colorPrimaries="bt709" colorRange="tv" colorSpace="bt709" colorTrc="bt709" frameRate="29.970" hasScalingMatrix="0" height="1080" level="41" profile="high" refFrames="3" streamIdentifier="1" width="1920" displayTitle="1080p (H.264)"/>
<Stream id="32097" streamType="2" selected="1" default="1" codec="aac" index="1" channels="2" bitrate="130" audioChannelLayout="stereo" profile="lc" samplingRate="48000" streamIdentifier="2" displayTitle="Inconnu (AAC Stereo)"/>
</Part>
</Media>
<Extras size="0"> </Extras>
</Video>
</MediaContainer>
16

Yes, that is the info I’m after.

guid="com.plexapp.agents.none://...

This means the movie has been matched to the ‘Personal Media’ agent and will never load any metadata.

Edit your movie library,
go to the ‘Advanced’ tab
what is selected as ‘Agent’ there?

17

Thanks.

I have this

fyj5zt.png962×372 60.3 KB

Please note that all my other library have the same configuration, and I have no issue for my thumbs.

18

Then it is no wonder you won’t getting anything new when you Refresh Metadata.

Now go to the preplay page of an affected movie
and use the Fix Match procedure.
Make sure to click on ‘Search Options’ and select as Agent either ‘Plex Movie’ or ‘The Movie Database’, don’t forget to pick a ‘Language’ after that.

Let’s see what happens.

19

I changed my PMS to english language.

Have only this :

I assume what you call “fix match” is “Match”.

Nothing better regarding my problem.

20

No. The language selector I was referring to is on the ‘Search Options’ dialog.
It is to the left of the ‘Auto Match’ command.