Problem with "calibredb add -m" and Umlauts in Metadata

[MontyB]

Hi,

I'm trying to merge kepub with epubs using kepubify and calibredb add -m. For all files with umlauts or special characters in the metadata it does not work.

What am I doing wrong?

#!/bin/bash
BIBLIOTHEK="/home/monty/Dokumente/Ebook Bibliothek"
./kepubify --calibre --smarten-punctuation --update --inplace "$BIBLIOTHEK"
find "$BIBLIOTHEK" -name '*.kepub' -print0 | xargs -0 -I _ calibredb add -m 'ignore' _