Henk, at
http://support.adobe.com/devsup/devsup.nsf/docs/51844.htm
it describes a typical xmp packet as:
<?xpacket begin='x' id='W5M0MpCehiHzreSzNTczkc9d'?>
... 700 bytes of XML data text ...
... 500 bytes of XML whitespace as padding ...
<?xpacket end='w'?>
so if I understand this right, something like
put URL ("binfile:" & yourJpeg) into tData
put offset("<?xpacket begin", tData) into startChar
--- if startChar = 0 then presumably there is no xmp packet....
put offset("<?xpacket end",tData) -1 into endChar
put char startChar to endChar of tData into tXML
get offset(">",tXML)
delete char 1 to it of tXML
would leave the actual XML data in the variable tXML.
A possible starting point, anyway.
Best,
Mark
On 27 Sep 2006, at 10:14, Henk van der Velden wrote:
Good day all,
Can anyone help me with editing XMP metadata in image files (JPEG)?
I've searched the archives and I've found some messages about EXIF
data and IPTC metadata. But it looks like no one has done XMP
reading / editing yet. It wouldn't perhaps be too difficult, since
XMP data is 'just' an XML tree put somewhere into the JPEG binary
data. But I have no knowledge of binary data, so I can't figure out
how to add these metadata to a (JPEG) file.
Another option might be Image Magick. If an external could be built
around the Image Magick libraries, that would provide another way
to read and edit XMP data.
I need this facility for a new application we are going to build
for a couple of local cultural institutions. We need to describe
lots of historical photographs, and it looks like the best way to
store these descriptions is as metadata inside the files. These
images are also to be used in educational applications, where
children can read - and eventually edit - the metadata.
There will be a budget to develop this kind of thing. So what I
would like to know is:
- who feels able to develop this?
- how would you build this kind of functionality
- an estimation of the costs
You can contact me off list.
Kind regards,
Henk
--------------------------
Henk v.d. Velden
iGlow Media
Magda Janssenslaan 44
3584 GR UTRECHT
0031 (0)6 16 024 337
www.iglow-media.nl
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