![]() When reading, this option causes a warning to be issued if standard XMP is found after the IDAT chunk. The PNGEarlyXMP option is applied automatically when deleting all XMP and writing new XMP back in one step. Adding the IgnoreMinorErrors option causes the XMP after IDAT to be deleted, thus resolving the conflict (at the expense of possible metadata loss), and allowing the file to be written. If this happens, a minor error is issued when the extra XMP is encountered, and the file is not written. However, since ExifTool uses a single-pass writing algorithm, it has no way to tell if XMP already exists later in the file before writing the new XMP in this location. The PNGEarlyXMP option causes ExifTool to instead add new XMP before the PNG IDAT chunk. This is allowed by the PNG and XMP specifications, but some utilities seem to ignore XMP if it comes after the image data. By default, ExifTool adds new XMP to the end of a PNG file (just before IEND). PNGEarlyXMPĮxifTool's Flag to write XMP in PNG images before the IDAT (image data) chunk. This should be considered as a bug in the Apple and Adobe software since XMP is allowed to exist after the image data according to the XMP and PNG specifications. Limitations in Spotlight, Preview, and PhotoshopĪpple Spotlight and Preview (OS X 10.8.5) and Adobe Photoshop CC (version 14.0) ignore XMP in PNG images if it comes after the image data, which is where ExifTool adds new XMP. I have tried many different variations of this but Spotlight don't see my keywords: /usr/local/bin/exiftool -api PNGEarlyXMP 1 -api IgnoreMinorErrors 1 -Keywords+="my keyword" -overwrite_original_in_place -P path_is_here.png I don't know much about how spotlight works." ![]() "I wouldn't be surprised if spotlight doesn't parse metadata in PNG images. ![]() The developer of ExifTool does not know about Spotlight, so he cannot help: I try to write keywords to PNG images using ExifTool but OS X's Spotlight cannot see these keywords at all. ![]()
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