Important Notice

Optimized to work with the latest version of ComfyUI (v0.18.1 + Frontend 1.42.8).

The latent upscaler ltx-2.3-spatial-upscaler-x2-1.1 has been released.
Version 1.0 had an issue where a strange overlay appeared at the end when generating long videos (241F+), but this has been fixed in 1.1.
Updating is strongly recommended.

Overview

This workflow is based on LTX-2.3 I2V/FLFV and supports multi-frame processing. It allows you to visually specify image ordering and keyframe timing. Special thanks to WhatDreamsCost for providing the powerful custom nodes.

Core Features

Three prompt input modes

1. Prompt enhancement using Ollama

2. Native LTX prompt enhancement

3. Plain (no enhancement)

If Ollama is not needed, you can disconnect it from the Ollama SubGraph node or simply delete the node.

1-pass / 2-pass selection

• 1-pass: Generates at the specified resolution (e.g., 1280×768).

• 2-pass: Recommended by Comfy / LTX. Generates at half resolution and then performs 2× upscaling.

Optional Features

Preview Switch: Displays a preview during sampling.

Audio-driven: Generates a video that matches an existing audio file.

Full Mode: Generated using Steps 15 and CFG 3.0. This takes a very long time. While the camera work and motion may be slightly improved, the generation time is not practical.

Note

If you encounter the error, please update ComfyUI-KJNodes to the latest version.

For HD generation in 2-pass mode, please use 1280×768 or 768×1280.
If the shorter side is 734, it will be truncated to 704.