This workflow uses Wan2.1 VACE to turn any input video into a seamless loop.

It feeds the last 15 frames of the input video, a X-30 frame blank segment, and the first 15 frames into VACE to generate a transition.

Finally, it removes the overlapping 30 frames (15 from the end and 15 from the start) and merges the result with the original video for output.

Resources you need:

📂Files :

Recommendation :
>24 gb Vram: base or Q8_0
16 gb Vram: Q5_K_S
<12 gb Vram: Q4_K_S

For base version
VACE Model: wan2.1_vace_14B_fp8_e4m3fn.safetensors or wan2.1_vace_1.3B_fp16.safetensors
In models/diffusion_models

CLIP: umt5_xxl_fp8_e4m3fn_scaled.safetensors
in models/clip

For GGUF version
VACE Quant Model: Wan2.1-VACE-14B-QX_0.gguf
In models/diffusion_models

Quant CLIP: umt5-xxl-encoder-QX.gguf
in models/clip

VAE: wan_2.1_vae.safetensors
in models/vae

ANY upscale model:

• Realistic : RealESRGAN_x4plus.pth

• Anime : RealESRGAN_x4plus_anime_6B.pth

in models/upscale_models

📦Custom Nodes :

• ComfyUI-Custom-Scripts

• ComfyUI-GGUF

• ComfyUI-KJNodes

• ComfyUI-VideoHelperSuite

• ComfyUI-mxToolkit

• ComfyUI-HunyuanVideoMultiLora

• rgthree-comfy

• ComfyUI-Frame-Interpolation

• WAS Node Suite

• ComfyUI-Florence2

• ComfyUI-Upscaler-Tensorrt

• ComfyUI-MultiGPU

• ComfyUI_LayerStyle