WAN 2.2 5b i2v Workflow

WAN 2.2 5B Workflow

A workflow for WAN 2.2 5B with multiple improvements for speed, flexibility, and usability:

• Auto resolution calculator – automatically adjusts resolution based on a maximum dimension.

• Video length in seconds – define duration in seconds instead of frames.

• Fast interrupt – integrates BlehModelPatchFastTerminate to stop WAN generations more quickly.

• FastWan LoRA – accelerates sampling. Recommended settings: steps = 4–6, CFG = 1.0.

• Taew2.2 Preview – extremely fast (~1s) preview decode to check quality before running the slower wan2.2_vae.

• 2-Step Process – first run generates a preview with taew2_2 , second run applies the full higher quality VAE decode with upscale and interpolation.

2-Step Process

The wan2.2_vae is slooooooooow...

Sometimes the VAE decode process takes longer than the generation itself.

This workflow allows partially decoding the latent video using the taew2_2 model, which is extremely fast (usually ~1 second, depending on video length and resolution), but slightly reduces video quality.

By using taew2_2 to create a preview, you can quickly decide if the video is worth keeping or if it needs prompt/setting changes before running the slow wan2.2_vae. This saves a lot of time, especially on lower-end hardware.

How to Use

• Step 1: On the first run, the workflow generates the video and decodes it with the taew2_2 model (fast preview).

• Step 2: If nothing is changed, the next run will decode the same latent video using the full wan2.2_vae model. After that, further processing (upscale/interpolation) will be applied, if enabled.

Important

The seed must be fixed. If it changes, a new video will be generated, and the workflow won’t decode the same latent with the full wan2.2_vae.

Download

Get the taew2_2 model here:
https://github.com/madebyollin/taehv/blob/main/taew2_2.pth

Place the file in:
ComfyUI\models\vae_approx\

FastWan Lora

In order to use lower step count and speedup the generation, download the FastWan lora and select it on the workflow.

https://huggingface.co/Kijai/WanVideo_comfy/blob/main/FastWan/Wan2_2_5B_FastWanFullAttn_lora_rank_128_bf16.safetensors

After enabling it, set:

• Steps: 4–6

• CFG: 1.0

Source: Kijai

Workflow Options

The workflow includes several features you can enable or disable to customize the output:

• Enable Fast taew2_2 Preview – Uses taew2_2 for fast preview decoding.

• Enable Sage Attention – Enables the use of Sage Attention during generation.

• Enable Two Steps Process – Runs first with taew2_2 preview, then with full wan2.2_vae decoding.

• Enable Use Tiled VAE – Uses tiled VAE decoding for handling larger resolutions.

• Enable Color Correction – Calibrates video colors using the first frame as reference.

• Enable Interpolate – Interpolates the video to 50 FPS for smoother motion.

• Enable Upscale – Upscales the video using the model selected in the “upscale” group.

• Enable Upscaled Video Show/Save – Displays and saves the upscaled video.