LUT Look-Up Table

What is LUT (Look-Up Table)?

A LUT is a preset file that adjusts the color grading of a video, mapping one set of colors to another, allowing for quick and consistent color adjustments.

There are two main types of LUTs: 1D and 3D. A 1D LUT adjusts output values for specific input ranges, affecting one color channel at a time. A 3D LUT allows changes across the three color channels, meaning changes in one channel can impact the others for more complex color transformations. 

When to use LUT?

Editors use a LUT (Look-Up Table) when they need to apply specific color grading to footage quickly so that there are consistent color adjustments across multiple scenes.

What is the size of a LUT table?

A standard LUT is typically 33x33x33, but sizes can vary. 17x17x17 LUT tables are also common but offer less precision.

What is the common LUT format?

The most common LUT format, CUBE, is widely used in video editing and color correction software. Another format, the Common LUT Format (CLF), is based on XML (Extensible Markup Language), a flexible, text-based standard used to structure and store data. This means CLF files are both human-readable and easily parsed by computers. The format supports floating-point values and offers high flexibility, making it ideal for modern color grading workflows.

How to adjust temperature and exposure of participant's mobile camera with Riverside

Hosts and Producers can adjust a camera's color temperature and light exposure for participants who are recording with the Riverside iOS or Android app. These camera controls allow for better-looking video, regardless of a participant's location and light conditions.

IMPORTANT: Hosts and Producers can only make camera control adjustments before recording or while the recording is stopped.

The participant must be using the Riverside mobile app for you to adjust their camera. Some Android handsets, like ones manufactured by Samsung, are not supported due to device limitations.

From computer browser

1. Join a Riverside Studio as a Host or Producer.
2. After a Guest joins, click the "People" icon and find their name in the Studio's sidebar.
3. Under the participant's name, click the downward arrow to open up more settings.
4. Click Adjust Camera.
5. In the new Adjust cam window, use the sliders to change Exposure or Temperature.
   Changes are automatically applied to the participant's video.
6. Click "X" to close the window or Reset all to cancel.
   

From iOS and Android apps

1. Join a Riverside Studio as a Host or Producer using the Riverside iOS app.
2. After a Guest joins, tap and hold a participant's video frame until the actions menu appears.
3. Select Adjust cam.
4. Tap the Temperature or Exposure icons to make changes.
5. Use the slider to adjust the video. Changes are automatically applied to the participant's video.
6. Tap Done to close the window or Reset all to cancel.
   

NOTES: While the Host or Producer is making changes, the participant sees a message "Your camera settings are being changed by your host..."

After the Host or Producer makes the changes, the participant cannot switch between the device’s front and rear cameras without leaving and re-entering the Studio.