Is it possible to re-create thumbnails embedded in EXIF ?

[patchfree]

Is it possible to re-create thumbnails embedded in EXIF with XnView?
My wish would be to alter the thumbnails (embedded in EXIF) after editing a photo (cropping, changing brightness...) to reflect the changes but keeping the other EXIF data?
Thanks

[XnTriq]

As of now (v2.05), there's only a command for updating/rebuilding/recreating existing embedded Exif thumbnails.

• Edit » Metadata » Recreate EXIF thumbnail

The same goes for the -buildexifthumb command line option of NConvert.

• embedded thumbnail rewrite
• Embedded Exif-Thumbnails, please a little more ...
• Re: Embedded Thumbnail Not Shown
• ExifTool & Thumbnail

Brief explanation on the program Exifer (version 2.1.5), for copying Exif-data and making a thumbnail.

Program and info can be found here: http://www.exifer.friedemann.info/

If you want to copy Exif-data:

1. Start the program Exifer, the screen is devided into 4 areas.
2. Left upper is the 'browser'-part, goto the directory where your pics are and select (click once on it) one of them without the exif-data.
3. Right upper screen got 4 tabs, selcect the tab 'Exif-data' to view the exif-data, with the selected pic it should be empty, screen says 'NO DATA'.
4. Goto the menu-bar on top of your screen, select Exif/IPTC -> Insert from File.
5. A new browser window will open and in that, select the picture where you want to copy the Exif-data from, then click on the Open-button.
6. The Exif-data will be copied then, no need to save your pic for that.

If you want to create a thumbnail for your pic:

1. Start the program Exifer, the screen is devided into 4 areas.
2. Left upper is the 'browser'-part, goto the directory where your pics are and select (click once on it) one of them without the exif-data.
3. Goto the menu-bar on top of your screen, select Exif/IPTC -> Thumbnail -> Create Thumbnail.
4. Thumbnail created, if it went right you can see that in left-upper browser window, no need to save your pic.

[patchfree]

Many thanks.