This warning occur when I use special utf8 characters in the keywords tag. And special characters are translated with ? in the output image.
The problem is only with this tag, all other tags are corectly filled with special characters.
important part of the command: exiftool -charset UTF8 -lang cs -Subject="česky,nečesky" -sep "," Keywords+="česky,nečesky" -XPKeywords="česky,nečesky"
Exif tags in the output image is:
Subject: česky,nečesky
Keywords: ?esky
Keywords: ne?esky
...
Version of exiftool: 10.36
OS: Fedora 24
LANG=cs_CZ.utf8
Thanks for your help!
Keywords is IPTC. See FAQ 10 (https://exiftool.org/faq.html#Q10) for details about how to handle special characters in IPTC.
- Phil
Great it works! The magic is: -charset iptc=UTF8
Thank you very much!
If you are using UTF8 encoding for IPTC, you should set -iptc:codedcharacterset=utf8 in the metadata. Then you won't need to specify the -charset option when reading.
- Phil