tag => { List => 'Bag', Writable => 'lang-alt' },

[herb]

Hello Phil,

Some days after my previous post I came to following additional question:

(4) Question
Is there a different behaviour of the list whether it is a Seq, Bag or Alt?

Best regards
Herb

[Phil Harvey]

Hi Herb,

(1) Finding 1

Code Select Expand

exiftool.exe -sep # -xmp-plus:custom1-x-default=x1#x2#x3 -xmp-plus:custom1-de=d1#d2#d3 -xmp-plus:custom1-fr=f1#f2 test.xmp
gives the following error:
Internal error: no list index for Custom1-x-default!

I do not get this error with the attached test.xmp file and the above command.

(2) Finding 2
With the attached file test.xmp I get different output whether using option -struct:

Yes.  ExifTool doesn't generate missing list entries unless the -struct option is used.

(3) Question: How does Exiftool populate the lists
During all my test I could not find out, how Exiftool really creates or modifies lists and populates it with the elements from the commandline.

This really hasn't been tightly defined because up until now nobody has really cared about this.  Most people would write the default and french entries at the same time, and wouldn't notice this quirk.  I can look into explaining/documenting and/or changing this behaviour if it is important to you.

- Phil

[Phil Harvey]

(4) Question
Is there a different behaviour of the list whether it is a Seq, Bag or Alt?

No.

- Phil

[herb]

Hello Phil,

thanks for your comments.

ad (1) Finding 1:

I do not get this error with the attached test.xmp file and the above command.

Yes, this happens only when the command is used to create the *.xmp file.
Sorry, that I was not clear enough.

ad (3) Question

I can look into explaining/documenting and/or changing this behaviour if it is important to you.

The main goal is/was to fully understand how Exiftool is working.
And sorry, I have to agree, it would be great when Exiftool would populate existing lists first that allow an element to be added.

Best regards
Herb

[Phil Harvey]

Yes, this happens only when the command is used to create the *.xmp file.
Sorry, that I was not clear enough.

Thanks.  I can reproduce this now.  I'll look into this.

ad (3) Question

I can look into explaining/documenting and/or changing this behaviour if it is important to you.

The main goal is/was to fully understand how Exiftool is working.
And sorry, I have to agree, it would be great when Exiftool would populate existing lists first that allow an element to be added.

This is a bit lower priority, but I'll look into this too if I get a chance.

- Phil

[Phil Harvey]

Yes, this happens only when the command is used to create the *.xmp file.
Sorry, that I was not clear enough.

Thanks.  I can reproduce this now.  I'll look into this.

I forgot to post back here, but this was fixed in ExifTool 11.66.

Thanks for the report.

- Phil