princepainter/ComfyUI-PainterI2V

An enhanced Wan2.2 Image-to-Video node specifically designed to fix the slow-motion issue in 4-step LoRAs (like lightx2v).

What it solves

This project addresses the "slow-motion" effect often found in Wan2.2 image-to-video (I2V) generation, particularly when using 4-step LoRAs like lightx2v. It increases the motion amplitude and makes camera movement prompts more responsive.

How it works

It replaces the standard WanImageToVideo node in ComfyUI with a specialized PainterI2V node. The system employs three core technical approaches:

  • Brightness-Protected Motion Scaling: It separates the luminance mean before scaling motion vectors to prevent brightness shifts during movement enhancement.
  • Zero Latent Initialization: It preserves the temporal dependency chain necessary for 4-step LoRAs.
  • Reference Frame Enhancement: It uses reference_latents to ensure the subject remains consistent while allowing for freer motion.

Who it’s for

Users of ComfyUI and the Wan2.2 model who want more dynamic, faster-paced movement in their AI-generated videos without sacrificing subject consistency.

Highlights

  • Motion Boost: Increases motion amplitude by 15% to 50% via a motion_amplitude parameter.
  • Plug & Play: Fully compatible with original Wan2.2 workflows.
  • Scene-Specific Tuning: Provides recommended settings for different movement types, from smooth walking (1.10‐1.20) to extreme sports (1.5).
  • Optimized for I2V: Specifically designed for single-frame image-to-video workflows.

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