Quote:
Originally Posted by npr
Yes it's working if I force calibre to update the "metadata.opf" file for each book.
Anyone know a bulk way to update that file?
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The metadata.opf in each book folder is maintained by calibre and the subtitle should be added there when editing metadata. AFAIR, the only time those files are used is when metadata.db in the root of the library folder is rebuilt.
Again, AFAIR, calibre updates the .opf file internal to the ePub to match calibre's current metadata during the send to device operation. I know you can disable this for a Save to disk operation but I can't remember ever seeing that capability to disable that update for a send to device operation.
You could use the Polish tool to update the metadata in the book files. See attached image for the setting to do only that. The Polish tool icon is the one that looks like a whisk broom.