Rebuild Thumbnails does not work...

[jaqian]

I upgraded from 1.96.1 to 1.97 and same problem exists. Anytime I scan a photo, I crop to tidy it up. I use the Rebuild Thumbnail to update the thumbnail but it never works for me under any version of XnView. I end up having to open the image in GIMP and re-save with thumbnail to sort.

Anyone else have this problem?

Cheers,
Rob

[jaqian]

I see where I was going wrong but still confused.

I was using View - Rebuild thumbnails when I should have been using Edit - Metadata - Recreate EXIF thumbnail

My question is what is View - Rebuild thumbnails for if it doesn't work (never had for me)? And why have two similar commands even if one is broken.

[JohnFredC]

Perhaps you have Options->Browser->Thumbnails->Appearance->Use Embedded thumbnail = ON?

If you do, and the embedded thumbnail has not yet been updated to match the image, then Rebuild thumbnails would display the (old) embedded thumbnail in the browser.

[jaqian]

So is View - Rebuild thumbnails a refresh for Edit - Metadata - Recreate EXIF thumbnail? Why isn't the thumbnail rebuilt automatically?

[JohnFredC]

So is View - Rebuild thumbnails a refresh for Edit - Metadata - Recreate EXIF thumbnail?

I don't think so. Rebuild is for the thumbnail image in XnView's cache. I would say there is sufficient ambiguity about XnView's behavior that a rewording (at the least) of the menu text might be appropriate in this case.

Why isn't the thumbnail rebuilt automatically?

Good question... one idea would be: if the image was changed by an outside (i.e. non-XnView) process but without updating the embedded thumb, how would XnView "know" that the thumb was out of date? The only solution there would be to constantly rebuild all embedded thumbs, which is impractical.

Perhaps someone else will jump in with a better response? For instance, under what circumstances does XnView update the embedded thumbnail?

[XnTriq]

Did you enable the Auto refresh setting in Tools » Options... » Browser » Browser, jaqian?

Auto refresh – Automatically detects any changes in displayed directory (file additions/deletions/changes) and modifies file list accordingly.

[...]

Update Treeview when refresh - Updates also folder tree when refreshing file list with F5, CTRL+R or View->Refresh menu option, or when refreshing automatically with 'Browser>File list>Auto refresh(???).

General Support

• [Duplicate] Toggling Auto Refresh On and Off
• Changing timestamps doesn't refresh folder?
• Thumbnails won't refresh
• Always display newest file in folder

Bug Reports

• RC2: Embedded thumbnails not updated after lossless crop
• RC4: Strange Redrawing when switching thumbnail view
• No Update for Thumbnails?!?
• Image view and Thumbnail don't match
• Slow redraw of browser when switching back from view mode
• ctrl+r to refresh a folder is unfocusing the current thumb i
• command REFRESH
• Autorefresh
• Images still sorted by old timestamp after "change time
• Folder thumbnails won't refresh
• Reloading of edited PNG images
• 1.94.2: Option "Rotate images based on EXIF orientation

Suggestions

• Refresh with F5 key
• Quick Enable/Disable for Auto Refresh
• suggestion on thumbnailing images
• Refresh issues in preview and browser fullscreen
• "Rebuild thumbnails" option in right click menu?
• Auto rebuild thumbnail when file date changes...
• after thumbnail creation, jumps to beginning
• Thumbnails are re-created if mode is changed
• suggestion : autorefresh frequency

Documentation

• Hidden features and settings

Resolved Bugs & Requests

• Automatically recreate the thumbnail after lossless crop

[jaqian]

XnTriq you always reply with a list of links, how do you do it so fast? Do you have a database of links to call on?

Autorefresh is the same as hitting F5, right? I do that anyway.

My problem was that I have rotated the thumbnails in XnView, then burnt the images to cd only to find that they aren't rotated. I think the problem is sorted now thanks to both of you.