exiftool "-datetimeoriginal<filename" -overwrite_original .
exiftool '-datetimeoriginal-=00:00:00 01:00:00' -overwrite_original .
exiftool -overwrite_original '-datetimeoriginal<${Comment; $_ =~ /(\d{2})-(\d{2})-(\d{4})\s+(\d{2}:\d{2}:\d{2})/; $_ = "$3-$2-$1 $4"}' .
exiftool -overwrite_original "-filecreatedate<datetimeoriginal" .
exiftool -overwrite_original "-filemodifydate<datetimeoriginal" .