png metadata

[Duncan Lithgow]

Toby Kelsey wrote:

>Let us know how you get on.
>  
>
Thanks for the tips.

You mention that wikipedia mentions the 'iTXt', 'tEXt' and 'zTXt' 
chunks. er, yes, but I haven't a clue what that all means. Do you?

Synaptic can't find 'convert' in  the repositories, and I can't find it 
on the net. Can you give me a link?

pngmeta is in one of the repositories and seems to do what it says. But 
that does not include being able to _write_ metadata.

duncan at ubuntu:~$ pngmeta cd.png
pngmeta: PNG metadata for cd.png:
Comment: Created with The GIMP
Modification Time: 26 Jan 2006 15:48:32 +0000
duncan at ubuntu:~$png

It looks like the author of digiKam is working on just what I might need 
(almost):
http://www.digikam.org/?q=node/62

I've dropped a line to greg who maintains the png website seeing if he 
can help.

Duncan