Convert-cube-to-xmp

XMP stands for Extensible Metadata Platform. This is Adobe’s proprietary standard. In the context of color grading, an XMP file acts as a container for a profile or preset.

You might need to convert CUBE to XMP in three specific scenarios:

Here’s a reusable convert_cube_to_xmp(cube_dict) function using xml.etree.ElementTree.

import xml.etree.ElementTree as ET
from datetime import datetime
def convert_cube_to_xmp(cube):
NS = 
"x": "adobe:ns:meta/",
"rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
"dc": "http://purl.org/dc/elements/1.1/",
"cube": "http://example.com/cube/1.0/"
 convert-cube-to-xmp
# Root
xmpmeta = ET.Element(f"NS['x']xmpmeta")
rdf = ET.SubElement(xmpmeta, f"NS['rdf']RDF")
desc = ET.SubElement(rdf, f"NS['rdf']Description", 
                     attrib=f"NS['rdf']about": "")
# Cube title
title = ET.SubElement(desc, f"NS['dc']title")
title.text = cube.get("cubeName", "UnnamedCube")
# Dimensions
dims = ET.SubElement(desc, f"NS['cube']dimensions")
seq = ET.SubElement(dims, f"NS['rdf']Seq")
for dim in cube.get("dimensions", []):
    li = ET.SubElement(seq, f"NS['rdf']li")
    li.text = dim
# Measures
meas = ET.SubElement(desc, f"NS['cube']measures")
seq_m = ET.SubElement(meas, f"NS['rdf']Seq")
for m in cube.get("measures", []):
    li = ET.SubElement(seq_m, f"NS['rdf']li")
    li.text = m
# Time range
if "timeRange" in cube:
    ts = ET.SubElement(desc, f"NS['cube']timeStart")
    ts.text = cube["timeRange"]["start"]
    te = ET.SubElement(desc, f"NS['cube']timeEnd")
    te.text = cube["timeRange"]["end"]
# Serialize
xpacket_start = '<?xpacket begin="\xef\xbb\xbf" id="W5M0MpCehiHzreSzNTczkc9d"?>'
xpacket_end = '<?xpacket end="w"?>'
rough_xml = ET.tostring(xmpmeta, encoding="unicode")
return f"xpacket_start\nrough_xml\nxpacket_end"



Write custom schema

Example namespace: http://example.com/cube/1.0/ with prefix cube:


Serialize to XMP (XML/RDF)



3D LUT Creator is the gold standard for professional colorists who need to move between Resolve and Lightroom. XMP stands for  Extensible Metadata Platform

This XMP file will now appear in Lightroom under "Presets" or "Profiles."
<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
<x:xmpmeta xmlns:x="adobe:ns:meta/">
  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
    <rdf:Description rdf:about=""
      xmlns:cube="http://example.com/cube/1.0/"
      xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>SalesCube</dc:title>
<cube:dimensions>
    <rdf:Seq>
      <rdf:li>Time</rdf:li>
      <rdf:li>Product</rdf:li>
      <rdf:li>Region</rdf:li>
    </rdf:Seq>
  </cube:dimensions>
<cube:measures>
    <rdf:Seq>
      <rdf:li>SalesAmount</rdf:li>
      <rdf:li>Quantity</rdf:li>
    </rdf:Seq>
  </cube:measures>
<cube:timeStart>2024-01-01</cube:timeStart>
  <cube:timeEnd>2024-12-31</cube:timeEnd>
</rdf:Description>

</rdf:RDF>
</x:xmpmeta>
<?xpacket end="w"?>


XMP (Extensible Metadata Platform) is an Adobe standard. When we talk about "XMP" in color grading, we usually mean Camera Raw profiles or Lightroom Presets.

The Core Issue: A CUBE file forces a color transformation. An XMP file suggests slider movements. To convert CUBE to XMP, you must capture the "look" of the LUT and translate it into slider data.