Thanks, Kovid, nice advice to rename the extension in advance.
For the unpack tool I faced some troubles: it tries to open a directory in which doen't have rights to write (strange, I have administrator rights in Windosw X) and also tampering with security delay the job for every book. Is there a way to modify the path where unpack tool open epub?
Anyway I solved the problem with Total Commander in the old fashion way, now my old 84 mb epub is a nice 13 mb epub.
Quote:
Originally Posted by kovidgoyal
Well you dont have to do it one by one. You can shift click to select all the png's in the editor, right click and change their extension to jpg. Then close the editor and use the unpack book tool which will give you the book contents including all image files in a folder. You can then use a simple script to actually convert the files (which are named .jpg but are actually png) from png to jpeg. Once that's done the unpack book tool will rebuild the ebook.
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