Is it possible to copy all XMP tags and make it IPTC tags or exif Tags?

[faridelya]

Hi everyone! @WildEyeConservation @Untouchable17 @dnsamw @sylikc
Hope you all doing well. I am stuck when adding a new tag that is not predefined for any metadata standard like

1. if I copy XMP tags and make them IPTC tags or exif tags?
2. or if I copy IPTC tags and make them XMP tags or EXIF tags?
3. or If I copy Exif tags and make them XMP tags to IPTC Tags?

currently, I can only add predefine tags for each standard by using this code

This first code working

from exiftool import ExifTool
with ExifTool() as et:
    print(et.execute(*["-XMP:Subject=hi"] + ["skyblue.png"]))

but the below code not working.

from exiftool import ExifTool
with ExifTool() as et:
    print(et.execute(*["-IPTC:Subject=hi"] + ["skyblue.png"]))

is there anything wrong with my code or what?, please write your precious answer
Thanks

[faridelya]

Hi, @Untouchable17 Thanks for your answer.
so we can say that there is no way to insert tags that are not part of XMP or IPTC or EXIF standard of metadata.
Only the predefine tags are inserted.

correct me if i am wrong
thanks

[sylikc]

there's no "easy" way... see my reply below. And for XMP, IPTC, and EXIF, you really shouldn't insert tags which are not part of the specifications... because no other application would read these tags anyways

[sylikc]

Also, in terms of how to use exiftool to get custom tags and insert as not part of the standards, it's best to ask this on the exiftool forums, as it's more of an upstream question

[faridelya]

hello everyone @WildEyeConservation @Untouchable17 @dnsamw @sylikc
please answer this very short question that

Can we add tags that are not predefine in each metadata standard by using ExifTool???
if yes please show us the code.

[sylikc]

@faridelya There are ways to add custom tags which are not defined by default. ExifTool has documentation on this ... try googling for many examples of custom tags people have asked https://exiftool.org/forum/index.php?topic=7377.0 and such

If you are set on making custom tags which no other applications read, I have a test which does exactly this, and read/writes binary from an arbitrary tag that I configured in the test. See 60d793f

[faridelya]

@sylikc Thanks you very much for you kind response