Artifacts on generated previews/thumbnails
Trying to set up Immich as my photo storage, I've been having a strange issue with generated previews and thumbnails. They sometimes include these artifacts (see uploads), which are added seemingly at random. They look like grey dots and are often laid out horizontally.
Both previews and thumbnails have this issue, but it is especially noticeable on previews, like when flipping through photos. In the web interface, the artifacts always disappear when zooming in on an image, I presume because it switches to the original image asset? It seems the original photos are at least undamaged.
Regenerating thumbnails for an image sometimes fixes it, sometimes it just results in different artifacts. Tried using jpeg or webm, different quality and resolution settings but they all yield the same results.
Has this been seen before, is there something that could cause this?
18 Replies
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If this ticket can be closed you can use the /close command, and re-open it later if needed.Are you able to check the server logs when you refresh the thumbnail on one of those images?
There is a bug in chrome that's causing stuff like this. Is it possible you're using chrome? Does it also show up in other browsers?
Yes, I've set the server to verbose logging but don't see anything abnormal, just the following:
I'm using Firefox, just tried Chromium with the same results though. Let me check the generated files on disk though
Here's some of the files in the
thumbs directory, the artifacts are also present here
The thumbnail and preview seem to have the same artifacts so maybe this happens during reading the original image file?
Yeah, I'd check the original file and see if they're also affected
I meant maybe something goes wrong in the decoding process. The original files in
library are unaffectedDid you already try re-generating thumbs for this asset?
what format is the original file?
Yes, it seems to happen randomly each time thumbnails are generated. Sometimes it comes out fine, sometimes it gets new artifacts, like this:
Originals are all regular
.jpg files@sogan thoughts?
If it helps, here's my docker compose setup
I've never seen this before. As you say, something seems to be going wrong when decoding. What did you take these pictures with?
These photos are pretty old, taken with my old Nexus 6P. But the issue also occurs with my newer photos from a different phone, so I don't think it matters here
I now suspect this may be caused by my storage setup, I use MergerFS to create a single volume from multiple HDDs. I'll try limiting Immich to a specific disk
It could definitely be FS corruption, yea
No change unfortunately. But I have now tried on a different PC and everything works fine. So maybe it's a hardware issue
The hardware is about 10 years old (it's my old PC repurposed as a NAS) so might just be time for an upgrade