Check which item and image type are wrong
An Emby poster, backdrop and episode thumbnail are different image choices. Begin by identifying the specific item and image type you want to change. A series poster can look correct while a season or episode image is wrong, so inspect the detail level rather than refreshing every image attached to the library.
If you supplied custom artwork, retain the original image file in a location you control. A server’s current display is not a backup of that creative asset. Note how the image was added and whether a local metadata application maintains it. This makes a later replacement understandable and recoverable.
Choose the image operation deliberately
Emby’s documentation distinguishes refreshing metadata from replacing existing images. Its replace-existing-images option removes existing images and downloads them again, including custom images. That is a wider action than asking the server to fetch something missing. Read the selected option before confirming a refresh.
For a single bad poster, use the item’s Edit Images route and inspect the available choices. Confirm the media identity before choosing an online result; artwork can be a symptom of an incorrectly identified title. Replacing a poster with the right picture can conceal a wrong underlying match if the year and identifiers are never checked.
Compare a targeted image change
Choose one appropriate image through the supported item controls and inspect the result in the server web interface. Then open the same item in the intended client. Record whether the server and client show the same artwork. This distinguishes the chosen server image from a client that may still display its earlier view.
Keep other metadata unchanged for this comparison. If the original custom image should remain authoritative, review the local artwork and metadata workflow before launching another broad replacement. A repeated automated writer can restore a previous image even when the manual change initially succeeded.
Preserve the result and its ownership
Once the chosen image appears as intended, retain its original file and a note of the item and image type. If it is an image licensed or created for your own use, preserve that provenance with the asset. A database search result is a discovery route, not a blanket permission to reuse artwork for an unrelated public campaign.
The expected outcome is a deliberate image selection with a recoverable custom original. If the wrong title keeps returning, diagnose identification or metadata precedence separately. If the film fails to open, investigate playback separately; an artwork refresh does not change the source video or the account that accesses it.
Questions answered
Can Replace existing images remove my custom poster?
Yes. Emby’s documentation warns that this operation also removes custom images. Keep the original asset before choosing it.
Should I fix a wrong movie match by selecting a better poster?
Verify the title identity and provider information first. A correct-looking poster can hide an incorrect underlying metadata match.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.