LTX 2.3 First Last Frame: Keyframe-to-Video Generator in ComfyUI

🚀 Turn a starting and ending frame into beautifully fluid video with natural motion and consistent style — powered by LTX 2.3.

▶️ Run Directly in Cloud:
https://www.runcomfy.com/comfyui-workflows/ltx-2-3-first-last-frame-in-comfyui-keyframe-to-smooth-video?utm_source=civitai

💡 Overview

LTX 2.3 First Last Frame is a ComfyUI workflow that creates seamless video transitions between two keyframe images. Provide a start image, an end image, and a short description of the movement — the workflow builds all in-between frames automatically with fluid motion and cinematic consistency.

Perfect for animating storyboard panels, visualizing motion concepts, creating looping content, or producing smooth scene transitions.

✨ Key Features

• Keyframe-to-Video: Define your start and end frames; the pipeline generates smooth, coherent motion between them.

• Prompt-Guided Motion: An advanced text encoder interprets your scene description for precise, cinematic transitions.

• LTX 2.3 22B Model: State-of-the-art video diffusion transformer for temporally consistent, high-fidelity output.

• Minimal Setup: Just two images and a prompt — fast, efficient, and ready for creative iteration.

🚀 Getting Started

1. Upload your first and last frame images.

2. Describe the motion you want between them (e.g., "camera slowly zooms in as petals fall").

3. Generate — the workflow interpolates all frames and outputs a polished MP4.

Click the "Run Directly" link above to bypass local setup and test this workflow immediately in your browser.