The problem is that you can only scan the book for metadata on import, and you can choose either embedded metadata or filename metadata but not both.
If you preserve the filename by using it as the metadata, you cannot later extract metadata from the file.
What I would like calibre to do is offer an option that filename metadata should override embedded metadata, or at least act as an optional supplementary source of lower priority.
Either way would allow both of us to save the original filename as meaningful custom metadata.
Kovid, would it be possible to add an option that filename can be used only to supply metadata that isn't already embedded in the file?
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