EXIV2 retrieve value from a single specific IPTC tag

[airdata3]

I am trying to retrieve a single value from an image's IPTC tag. I have tried multiple syntax but not getting what I need. Hopefully someone here can help.

The command line entry:
exiv2 -piv d:\aviation\photos\2023\23L0010.jpg

This retrieves 12 lines of tags. I need the value contained in one tag only - Iptc.Application2.Caption
How do I retrieve this using EXIV2 command line?

Any help is very much appreciated.
Thanks

Mark

[postscript-dev]

@airdata3
I don't know which version of Exiv2 you are using but the latest 0.28.0 manpage only has a couple of very minor changes from several 0.27.x releases. The new manpage contains more information and examples.

The command line entry:
exiv2 -piv d:\aviation\photos\2023\23L0010.jpg

This retrieves 12 lines of tags. I need the value contained in one tag only - Iptc.Application2.Caption
How do I retrieve this using EXIV2 command line?

In the exiv2 app, you can filter specific tags with --key key or groups of tags using --grep str. If you need to, you can control the output more precisely by using --Print flgs instead of --print mod.

It is worth noting that when using Windows' cmd.exe or Powershell, globbing is not supported (see #2633 for a work around). The manpage has not been updated yet to reflect this issue.

[airdata3]

Thanks for the reply. I got it going and got a shell command going from within an Access database to get the required tag information.

[clanmills]

As always, @postscript-dev has provided a perfect answer. Here's my version of the same message:

1. Get the IPTC metadata:

531 rmills@rmillsm1:~/temp $ exiv2 -pi https://clanmills.com/Stonehenge.jpg
Iptc.Envelope.ModelVersion                   Short       1  4
Iptc.Envelope.CharacterSet                   String      3  G
Iptc.Application2.RecordVersion              Short       1  4
Iptc.Application2.Caption                    String     12  Classic View

2. Select one tag of interest:

532 rmills@rmillsm1:~/temp $ exiv2 -K   Iptc.Application2.Caption  https://clanmills.com/Stonehenge.jpg
Iptc.Application2.Caption                    String     12  Classic View

3. Only print the value of the tag:

533 rmills@rmillsm1:~/temp $ exiv2 -K   Iptc.Application2.Caption  -Pv https://clanmills.com/Stonehenge.jpg
Classic View
534 rmills@rmillsm1:~/temp $ 

Well done @airdata3 to execute a shell command from access.

Case Closed?