Name, Description and Keywords are not recognized by Shutterstock

P_Cherry · February 14, 2018, 2:17pm

Hi,
I added Name, Description and Keywords in Darktable and exported picture as JPG.
As you can see, Windows shows everything, but not Shutterstock. No problem with Pond5.

darix · February 14, 2018, 2:37pm

maybe open a case with shutterstock why this is missing. could also be a bug on their side.

P_Cherry · February 15, 2018, 4:30pm

I just did, let’s wait and see.
But to be sure, is Darktable format compatible with IPTC standard?
Is anybody using Darktable for writing keywrods and description for stock photos?

houz · February 15, 2018, 5:47pm

No, darktable doesn’t write IPTC data.

Jacal · February 15, 2018, 6:37pm

If possible, I would like darktable to stick to XMP metadata, although some services and software might (and do) still expect IPTC.

IPTC is old and outdated, with many drawbacks (like tag length limitations), and while UTF-8 is officially supported, some programs use it, some offer this as an option, and some are using locale charsets, which can be a nightmare when one is using, for instance, a Windows system in a language with some “foreign” characters.

When necessary, XMP tags can be copied to IPTC via ExifTool and similar programs.

pk5dark · February 15, 2018, 6:47pm

I use a lua script which calls the exiftool after export mainly to copy over the tags as piwigo.org only reads tags from IPTC.

github.com

chrik5/lua-scripts/blob/exiftool/contrib/exiftool_export.lua

--[[
    This file is part of darktable,
    copyright 2016 by Christian Kanzian.

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
]]

--[[
EXIFTOOL ACTIONS ON EXPORT

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P_Cherry · February 19, 2018, 3:19pm

Are you able to run this LUA script with Windows Darktable also?
I tried several locations of lua script (AppData\Local\darktable OR Darktable\share\darktable) and luarc but still can’t see any new module in Darktable.

require “exiftool_export”
require “lua/exiftool_export”
nothing works…

Thanks for help.

houz · February 19, 2018, 3:33pm

I don’t think that would work, the script uses an external program to do its job. That being said, Lua should work on Windows, too, if there is no Unicode character in the path. And thus not in your username.

pk5dark · February 19, 2018, 4:34pm

Windows, well I’m sitting all day long in front of such a machine, but don’t use it for my RAW images to process.

Anyway, I got it working on Win10 with the attached LUA script.

I did following for installation:

Install exiftool in a place where it can be found if you use the cmd.exe from any place. I copied exiftool.exe into C:\Windows\
in AppData\Local\darktable I made a new folder lua and copied exiftool_export.lua into this folder
created a luarc and added require "exiftool_export"

exiftool_export_windows.zip (2.0 KB)

From the original version I removed the checking if the exiftool is installed. I also needed to replace ' with "

Sometimes even a blind chicken …

edit: cmd.exe pops up on every call. That can be a bit annoying I guess …

P_Cherry · February 20, 2018, 10:36am

@pk5dark: Thanks a lot, now LUA is really working:slight_smile:
I can see my tags on Shutterstock after export now, but no description, i need to investigate.

pk5dark · February 20, 2018, 11:01am

Dam, I forgot to fix that part in the script. So it won’t work with the version above, Sorry.

exiftool_export_windows.zip (2.0 KB)

You need to figure out what else need to be copied.

You can try to use the exiftool with an arguments file. An arguments file can have several options over multiple lines. This is the -@ option, which you should be able select from the modul. There is a kind of official but old sample argument file. If you select the -@ option in the modul, you will get a field for file selection. You can try this file:

github.com

alchemy-fr/exiftool/blob/master/arg_files/xmp2iptc.args

#------------------------------------------------------------------------------
# File:         xmp2iptc.args
#
# Description:  Tag name translations for converting from XMP to IPTC
#
# Usage:        exiftool -tagsFromFile SRCFILE -@ xmp2iptc.args DSTFILE
#
# Requires:     ExifTool version 7.45 or later
#
# Revisions:    2005/05/14 - P. Harvey Created
#               2008/03/04 - PH Changed Location translation and added
#                            IntellectualGenre and SubjectCode
#               2008/09/30 - PH Added writing of Photoshop:IPTCDigest
#               2009/01/20 - PH Updated to conform with MWG spec
#               2009/10/21 - PH Write IPTC:DigitalCreationDate/Time tags
#
# References:   http://www.iptc.org/IPTC4XMP/
#               http://www.iptc.org/IIM/
#               http://www.adobe.com/products/xmp/pdfs/xmpspec.pdf
#               http://www.metadataworkinggroup.org/specs/

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P_Cherry · February 20, 2018, 11:36am

@pk5dark: You are right, there was just Keywords to Tags mapping in the LUA script.
Can I add mapping for Title without using argument file? I tried to add -XMP-dc:Title > IPTC:ObjectName mapping into LUA script, but it is not working:

cmd_options[1] = “-XMP-dc:Subject > IPTC:Keywords -XMP-dc:Title > IPTC:ObjectName”

pk5dark · February 20, 2018, 12:44pm

@P_Cherry: before fideling with the script, you can try command options directly in the cmd.exe.

I’m not an exiftool expert

If I try

exiftool "-XMP-dc:Subject > IPTC:Keywords -XMP-dc:Title > IPTC:ObjectName" image.jpg

in the cmd.exe I got the error message:

Warning: Invalid tag name 'iptc:keywords -xmp-dc:title > iptc:objectname'

I think it would be much easier to use an arg file. Just create a new txt file (XMPtoIPTC.txt) and add arguments line by line like:

-XMP-dc:Subject > IPTC:Keywords
-XMP-dc:Title > IPTC:ObjectName

and then try:

exiftool -@ XMPtoIPTC.txt image.jpg

Tobias · February 20, 2018, 3:49pm

@pk5dark Could you please test if this “check_if_bin_exists” version works with Windows?

function check_if_bin_exists(bin)
  local result
  if (dt.configuration.running_os == "windows") then
    local f=io.open(bin,"r")
    if f~=nil then 
	  io.close(f) 
	  return true 
	else
	  return false 
	end  
  elseif (dt.configuration.running_os == "linux") then
    result = os.execute("which " .. bin)
  elseif (dt.configuration.running_os == "macos") then
    result = os.execute() -- ToDo: We need something here
  else
    result = false
  end
  if (not result or result == nil) then
    result = false
  end
  return result
end

pk5dark · February 20, 2018, 4:11pm

@Tobias

if not check_if_bin_exists("exiftool") then
    dt.print_error("exiftool not found")
	return
	else
	dt.print_error("exiftool found")
end

LUA ERROR exiftool not found

What
local f=io.open(bin,"r")
should do on Windows?

me don’t like to test much on windows

P_Cherry · February 20, 2018, 5:26pm

Yes, I know I can use arg file. But I am curious if it is possible to use more arguments directly in exiftool commamnd line…
Maybe someone expeienced with exiftool itself?

exiftool “-XMP-dc:Subject > IPTC:Keywords -XMP-dc:Title > IPTC:ObjectName” image.jpg
in the cmd.exe I got the error message:
Warning: Invalid tag name ‘iptc:keywords -xmp-dc:title > iptc:objectname’

ashurbanipal · February 21, 2018, 12:37am

I don’t have access to a windows box to test, but this seems to work for me on the command line in Bash:

exiftool -IPTC:Keywords=xmp-dc:Subject -IPTC:ObjectName=xmp-dc:Title image.jpg

I wouldn’t think cmd.exe would be that different; maybe just a matter of putting the arguments in quotes?

pk5dark · February 21, 2018, 7:38am

Are you sure this works in bash?
in cmd.exe I get following IPTC entries:

IPTC
Keywords:	xmp-dc:Subject
Application Record Version:	4
Object Name:	xmp-dc:Title

which is expected I guess with the = operator

Tobias · February 21, 2018, 8:13am

What
local f=io.open(bin,“r”)
should do on Windows?

It should, but I don’t have a Windows to test. Maybe we need the complete path.

pk5dark · February 21, 2018, 8:29am

@Tobias There is a PATH variable on windows, but I guess it is not mandatory? So most windows programs which rely on external binaries have some file chooser in the preferences in such cases.

I think so, because programs can be installed in different places and there is no which command.

OT:
Currently this check_if_bin_exists() function in the lua scripts is a bit of needless. There is no script/plugin installer, so there is some knowlegde required to install the scripts and users need to read the docs and description. If somethings goes wrong users likely can check themself the error logs. Unfortunately, on windows darktable.print() is only written to the log file and not printed in the cmd.exe. dartable.error() disappears quite fast. So maybe it is not easy to find errors. Once there is a script installer check_if_bin_exists() would make more sense.

Maybe we should split the thread?