[Tutorial] Alibaba Wan 2.1 InPaint with ComfyUI: Start/End Frame Workflow for Low VRAM PCs 2025-04-22

Alibaba Wan 2.1 InPaint with ComfyUI: Start/End Frame Workflow for Low VRAM PCs​

Step-by-Step: Using Alibaba Wan 2.1 InPaint in ComfyUI (Low VRAM Friendly)​

Step 1: Install Wan 2.1 in ComfyUI​

• []Download the Wan 2.1 InPaint model from the link below. []Place the file inside: \ComfyUI\models\diffusion
• Load it using the "Juan Fun InPaint 2 Video" node.

Step 2: Optimize for Low VRAM GPUs​

• []Running on a weak GPU? Try these settings:
  • []Use the 1.3B model instead of 14B
    []Set resolution to 512x512 or lower
    []Add --lowvram flag to ComfyUI startup
• Tested on a GTX 1650 4GB — runs smoothly!

Step 3: Run Your First Interpolation​

• []Connect your start and end images to CLIP Vision Encode. []Set CFG values:
  • []CFG 0: Enables raw motion (detects errors early) []CFG 4-5: Best for final renders (sharper details)
• Click Generate and let the AI do the magic!

What You’ll Learn: How to set up Wan 2.1 InPaint in ComfyUI Start/End Frame interpolation for seamless AI videos Optimized low VRAM workflow (tested on consumer GPUs) Fixes for blurry results and upscaling tips