| Feel free, though that's not what I meant (and my app reads all the attribs up front anyway). I just meant that if there are apps that are in the habit of copying string attribs around via fixed length buffers, they may need to be careful.
-- lg On Jul 17, 2013, at 4:23 PM, Peter Hillman wrote:
There's support for zipped string attributes in a feature branch at
github, and should make it into an upcoming official release.
If the data gets quite big, maybe the XMP attribute could be a
zipped string. This keeps down file size, but also helps read speed
and memory usage, since the zipped strings are not uncompressed
until the contents of the string are queried.
On 18/07/13 11:12, Larry Gritz wrote:
+1
As XMP, it's just an ordinary string (though potentially a
big one) and the naming conventions are already decided by
others. Though it does beg the question of a portable, compact,
nicely licensed parser for XMP. (I rolled my own but am not
especially happy about it. Does anybody have a good
recommendation?)
As an alternative, what I do in OIIO when saving EXIF data
into OpenEXR files is simply to name it all "Exif:Foo" or
"IPTC:Foo", with Foo being the official Exif or IPTC names, and
the prefix making it pretty easy to distinguish from ordinary
exr user metadata.
On Jul 17, 2013, at 10:09 AM, Lars Borg wrote:
Thomas,
Why not use XMP instead?
XMP includes all of EXIF + Dublin Core ++
Lars
Hi,
I'm resurrecting that thread after 7 years,
I basically wanted to know if there has been
more discussions about that matter in the
recent years.
The fact there is no standard attributes
for common camera data prevents a bit the
format to be used as a solid input container
for photo processing applications or anything
relying on EXIF data. For instance if you want
to stitch EXR files with PTGui you will have
to enter your data manually.
I think it would be really important trying
to establishing a standard list of attributes
as suggested by Thomas Lock, the exrstdattr
already provides a list of them, maybe
completing / updating this one?
Cheers,
Thomas
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