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How do I apply LUTs and CDL during a transcode?


See the video ‘Setting Up A Job Template’ on our Tutorials page.

When setting up a Deliverable, the settings available depend on the file type selected. When using the Add Lut button there are a range of preset LUTs for different camera systems. The presets are mostly 3D LUTs that provide a camera log to Rec. 709 conversion. An example LUT file name is 'arri.logc.rec709.EI1000.ee.3d.lut', and the file name describes:  <SourceCamera>.<SourceColourspace>.<TargetColourspace>.<SourceExposureIndex>.<OutputRange>.<LutType>.extension. The OutputRange of 'ee' indicates extended range (black=0, white=1024 in output file) while 'el' indicates legal range (black=64, white=940 in output file).

Where a set of LUTs are provided for a range of exposures you can configure the system to select the correct LUT based on the exposure of the clip. First select a LUT from the set provided. Then, in the Lut field edit the name so that the exposure value is replaced with the metadata tag {ExposureIndex}, e.g. arri/arri.logC.rec709.EI/{ExposureIndex}.ee.3d.lut. This means that for every clip, the correct LUT will be applied based on the ExposureIndex value in the clip metadata. To use custom LUTs click the Add Lut button and navigate to the LUT file using the browser. Custom LUTs can be installed in /Library/Application Support/Codex/luts, which is the default location for the browser when using the Add Lut button. For 'dpx', 'mov' and 'mxf' file types the 'ARRIRAW' setting can be used to select the de-bayer used for ARRIRAW source material - 'ARRI' (ADA-5) or 'Codex'. The 'Processing' option relates to scaling and debayering operations. It is recommended to set this to High to get the best result.