How to Apply a LUT in Kdenlive for Log Video

This guide provides a straightforward, step-by-step tutorial on how to apply a 3D LUT (Look-Up Table) file to log video footage within Kdenlive. Color correcting flat log footage can be time-consuming, but using a 3D LUT allows for instant color normalization. You will learn how to locate the LUT effect, import your .cube files, and properly apply them to your timeline clips to establish a clean, professional starting point for your color grading workflow.

Step 1: Import Your Log Footage

  1. Open Kdenlive and import your log video clip into the Project Bin.
  2. Drag and drop the video clip onto your timeline.

Step 2: Locate the Apply LUT Effect

  1. Navigate to the Effects tab (usually located in the bottom-left or center panel).
  2. In the search bar of the Effects panel, type “LUT”.
  3. You will see the Apply LUT effect (often categorized under Color or Image adjustment).

Step 3: Apply the Effect to Your Clip

  1. Click and drag the Apply LUT effect directly onto your log video clip in the timeline.
  2. Select the clip on the timeline to open its properties in the Properties / Effect Stack panel.

Step 4: Load Your 3D LUT File

  1. In the Effect Stack panel under the “Apply LUT” settings, look for the LUT file selection field.
  2. Click the folder icon next to the file path box to open your system’s file browser.
  3. Locate and select the 3D LUT file (typically in .cube format) that corresponds to your camera’s log profile (e.g., S-Log3 to LC-709A, V-Log to Rec.709).
  4. Click Open. Kdenlive will immediately apply the LUT, converting your flat log footage into a normalized, high-contrast Rec.709 color space.

Step 5: Adjust Interpolation and Fine-Tune

  1. In the “Apply LUT” effect settings, you can choose the Interpolation method. Trilinear is standard, but Tetrahedral often provides higher-quality color gradations if your system supports it.
  2. If the LUT makes the highlights too bright or shadows too dark, add a Lift/Gamma/Gain or Curves effect before the Apply LUT effect in your stack. Adjusting exposure before the LUT is applied ensures you do not clip your highlights or crush your shadows.