Andrew, Thanks for the help. After a lot of fruitless research trying to make PNG files display metadata in Photoshop (target app by client request), I have moved to TIFF.
With some more work today, I now have a Python afterRender function in Nuke that adds the metadata fields to the rendered images - which *do* show up in Photoshop! I'm calling exiftool in my python function to do the work of adding the metadata tags, referencing a text file that holds all of the arguments for the exiftool command. Through the process of elimination, I discovered which xmp tags that Photoshop uses in their file info display. They are a hodgepodge from the xmp-photoshop, xmp-dc and xmp-itpsCore groups. ...So, to make a long story a little bit shorter, we will be telling our clients that, if they *really* want the metadata visible in PS, they'll need to move away from PNG file deliverables to TIFFs. I spent *way* too many hours figuring this out (mostly beating my head on a wall of PNGs), but I suppose I learned a few things in the process! ;^) Rich Sent from my iPod > On Apr 1, 2014, at 3:44 PM, Andrew Mumford <a_mumf...@mac.com> wrote: > > What’s your target app - PS or Bridge or non-adobe ? > > If it’s adobe then I would try finding some way to kluge it via automation / > droplet. > > A quick bingle seemed to imply that IPTC support in the png spec’s was > limited which might explain why PS use’s it’s own category header in an > attempt to do no harm but then proceeds to ignore any other headers since it > doesn’t no how interpret it since it’s not in the spec. > > Other IPTC tools I’ve used in case they are helpful mainly mac based :- > > Image Ingester / Exif Changer www.basepath.com - exiftool based > Meta Machine http://www.hindsightltd.com/metamachine/index.html > Media Pro formerly iView / WIndows Media - www.phaseone.com - pretty solid > and scriptable > Photo Mechanic www.camerabits.com is the gold standard for anything to do > with metadata > > “Good luck with all that” - Seinfeld circa 2005 > > --- > Andrew Mumford > > a_mumf...@mac.com > 1 (310) 619 0208 > > > > >> On Mar 31, 2014, at 6:31 PM, Richard Bobo <richb...@mac.com> wrote: >> >> Thanks, Andrew. >> After sending my email, I came across Exiftool and Exiv2. Both seemed to do >> the trick, but the problem I am running into has to do with the way >> Photoshop reads and writes IPTC data - which seems to be non-standard (what >> a surprise). If I write the IPTC metadata in Photoshop, it’s invisible to >> the readers in those programs. And, if I write the data with those programs, >> Photoshop does not see it. >> >> Looking through the docs for Exiftool, I believe it might be because PS puts >> the data in its own category header area. Unfortunately, I need the data to >> be viewable in PS. So, I am now researching a bit more to see if there is a >> standalone/commandline tool that will read and write Photoshop’s metadata… >> >> Thanks! >> Rich >> >> >>> On Mar 31, 2014, at 3:58 PM, Andrew Mumford <a_mumf...@mac.com> wrote: >>> >>> Exiftool - http://www.sno.phy.queensu.ca/~phil/exiftool/ is bulletproof >>> and cross platform ... >>> --- >>> Andrew Mumford >>> >>> a_mumf...@mac.com >>> 1 (310) 619 0208 >>> >>> >>> >>> >>>> On Mar 31, 2014, at 12:47 PM, Richard Bobo <richb...@mac.com> wrote: >>>> >>>> Hi all, >>>> >>>> Has anyone had to write IPTC metadata in their PNG output images before? >>>> And, if so, how did you do it? I need to output PNGs with some metadata >>>> that can be viewed in Photoshop under the IPTC tab of the File Info >>>> command... >>>> >>>> Thanks for any help, >>>> Rich >>>> >>>> Rich Bobo >>>> Senior VFX Compositor >>>> Email: richb...@mac.com >>>> Mobile: 248.840.2665 >>>> Web: http://richbobo.com >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> >>> _______________________________________________ >>> Nuke-users mailing list >>> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> _______________________________________________ >> Nuke-users mailing list >> Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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