|
JPG (Jpeg) is a very common
normal cover IMAGE format
You don't normally 'convert' just an image.
Images (covers)are incorporated as a File (page) in a book.
The file gets flagged as the cover(page)
and the Image gets flagged as the cover(image)
If yo us Calibre Editor to Add a cover, these flags get set for you
Or if you place the cover image into the Library Metadata details for the book, Them click, EMBED icon, it will add or replace the metadat+cover in the library copy of the book
|