Color Boost Video

Overview

Splits a video into frames, grades each frame, and reassembles the frames into a new video. A Grading Intensity input drives the saturation pass, so you can bind it to a slider in the app view.

  1. Video Input (nodetool.input.VideoInput, named source_video) - The clip to grade. The template ships with a short demo clip.
  2. Frame Iteration (nodetool.video.ForEachFrame) - Extracts frames with ffmpeg and emits frame, index, and fps. Start and End are frame numbers and End is inclusive. The template sets End to 2, so only three frames are graded. Set End to -1 to grade the whole clip.
  3. Exposure (lib.image.color_grading.Exposure) - Applies exposure 0.2, contrast 0.1, highlights -0.1, and shadows 0.1.
  4. Saturation and Vibrance (lib.image.color_grading.SaturationVibrance) - Vibrance is 0.4. Its saturation property comes from the Grading Intensity input (nodetool.input.FloatInput, range -1 to 1, default 0.5).
  5. Reassembly (nodetool.video.FrameToVideo) - Recompiles the graded frames at the fps that ForEachFrame reports, and sends the result to the graded_video output.

Demo

Tags

video, start

Workflow Diagram

graph TD video["VideoInput (source_video)"] intensity["FloatInput (grading_intensity)"] frames["ForEachFrame"] exposure["Exposure"] saturation["SaturationVibrance"] assemble["FrameToVideo"] out["Output (graded_video)"] video --> frames frames -->|frame| exposure exposure --> saturation intensity -->|saturation| saturation saturation --> assemble frames -->|fps| assemble assemble --> out
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