How to add metadata using Exiftool?

Question

I have an image, where I want to create a new tag called "DepthMap" and add an image to that tag. I have searched a lot but could not find an example to do it.

Answer 1

Assuming you want to embed a depth map image into the XMP-GDepth:DepthImage tag, the basic command would be:
exiftool "-xmp-gdepth:DepthImage<=depthmap.jpg" File.jpg

But note that there might be other data required. See this exiftool forum post for more info. A couple changes from that post is that the config file is no longer necessary and xmp-gdepth:data is now XMP-GDepth:DepthImage as shown in the above command.