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exiftool allows appending to a repeatable list of tags, for example Image Creator (dc:creator). This functionality also works through pyexiftool:
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% python >>> from exiftool ' import ExifToolHelper >>> with ExifToolHelper() as et: ... et.execute("-XMP-dc:creator+=New Creator' Jane Smith","test-image.jpg") ... '1 image files updated\n' % exiftool -XMP-dc:creator test-image.jpg Creator : CreatorJohn 1Smith, Creator 2, New CreatorJane Smith |
Would you like more examples? Just ask!
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