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I am trying to edit a custom metadata value of a JPG file (static image of a Live Photo created by iPhone). Tried the exiftool but it doesnt work for me.

For reference this is the metadata of one of the file - https://www.metadata2go.com/result/93287b28-1c16-4491-affe-8ffbd6d9dd1a

the field I would like to edit and update is

Content Identifier DF64C2AE-ED3C-4778-BFCA-C15277E521D2

I tried updating the field with exiftool

exiftool -ContentIdentifier=5A0FFB8D-5410-4464-A343-61AE4A6C1109 LW16.jpg

It always throw error like file cannot be read or Warning: Tag 'ContentIdentifier' is not defined Nothing to do.

Anyone can help me with this or guide me with another method to change the value ?

vinny
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  • What version of exiftool are you using? The `ContentIdentifier` tag was identified [Dec 2017](https://exiftool.org/forum/index.php?topic=8750.msg44950#msg44950) and probably added to exiftool soon after, though I can't find when it was or when it was made writable. With ver 12.19, it was renamed to `MediaGroupUUID`, though `ContentIdentifier` should still work. It is important to note that this is a `MakerNotes` tag and they cannot be individually created or deleted. So if the file doesn't already contain the correct `MakerNotes`, you can't add this data. – StarGeek May 23 '21 at 14:30

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