How can I embedded a thumbnail in Jpeg file using imagemagic

[n179911]

Hi,

I have an existing jpg, how can I add an embedded thumbnail to the jpg exif data?
And after that, how can I view the thumbnail of the jpg to make sure that is insert correctly?

Thank you.

[fmw42]

I do not believe that IM allows user data to be inserted into the EXIF section of an image. It only reads from EXIF. Perhaps you can do it directly with EXIFTOOL. But, I will defer to any others who may know otherwise.

[fmw42]

see also http://www.imagemagick.org/Usage/formats/#jpg_non-im for other tools that may help