<h2 id="wan-2.2-5b-workflow">WAN 2.2 5B Workflow</h2>A workflow for WAN 2.2 5B with multiple improvements for speed, flexibility, and usability:<ul><li>Auto resolution calculator – automatically adjusts resolution based on a maximum dimension.</li><li>Video length in seconds – define duration in seconds instead of frames.</li><li>Fast interrupt – integrates BlehModelPatchFastTerminate to stop WAN generations more quickly.</li><li>FastWan LoRA – accelerates sampling. Recommended settings: steps = 4–6, CFG = 1.0.</li><li>Taew2.2 Preview – extremely fast (~1s) preview decode to check quality before running the slower <code>wan2.2_vae</code>.</li><li>2-Step Process – first run generates a preview with <code>taew2_2</code> , second run applies the full higher quality VAE decode with upscale and interpolation.</li></ul><hr /><h2 id="2-step-process">2-Step Process</h2>The <code>wan2.2_vae</code> is slooooooooow...Sometimes the VAE decode process takes longer than the generation itself.This workflow allows partially decoding the latent video using the <code>taew2_2</code> model, which is extremely fast (usually ~1 second, depending on video length and resolution), but slightly reduces video quality.By using <code>taew2_2</code> 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 <code>wan2.2_vae</code>. This saves a lot of time, especially on lower-end hardware.<h3 id="how-to-use">How to Use</h3><ul><li>Step 1: On the first run, the workflow generates the video and decodes it with the <code>taew2_2</code> model (fast preview).</li><li>Step 2: If nothing is changed, the next run will decode the same latent video using the full <code>wan2.2_vae</code> model. After that, further processing (upscale/interpolation) will be applied, if enabled.</li></ul><h3 id="important">Important</h3>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 <code>wan2.2_vae</code>.<h3 id="download">Download</h3>Get the <code>taew2_2</code> model here: <a target="_blank" rel="ugc" href="https://github.com/madebyollin/taehv/blob/main/taew2_2.pth">https://github.com/madebyollin/taehv/blob/main/taew2_2.pth</a>Place the file in: <code>ComfyUI\models\vae_approx\</code><hr /><h2 id="fastwan-lora">FastWan Lora</h2>In order to use lower step count and speedup the generation, download the FastWan lora and select it on the workflow.<a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/WanVideo_comfy/blob/main/FastWan/Wan2_2_5B_FastWanFullAttn_lora_rank_128_bf16.safetensors">https://huggingface.co/Kijai/WanVideo_comfy/blob/main/FastWan/Wan2_2_5B_FastWanFullAttn_lora_rank_128_bf16.safetensors</a>After enabling it, set:<ul><li>Steps: 4–6</li><li>CFG: 1.0</li></ul>Source: <a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/WanVideo_comfy/tree/main/FastWan">Kijai</a><hr /><h2 id="workflow-options">Workflow Options</h2>The workflow includes several features you can enable or disable to customize the output:<ul><li>Enable Fast taew2_2 Preview – Uses <code>taew2_2</code> for fast preview decoding.</li><li>Enable Sage Attention – Enables the use of Sage Attention during generation.</li><li>Enable Two Steps Process – Runs first with <code>taew2_2</code> preview, then with full <code>wan2.2_vae</code> decoding.</li><li>Enable Use Tiled VAE – Uses tiled VAE decoding for handling larger resolutions.</li><li>Enable Color Correction – Calibrates video colors using the first frame as reference.</li><li>Enable Interpolate – Interpolates the video to 50 FPS for smoother motion.</li><li>Enable Upscale – Upscales the video using the model selected in the “upscale” group.</li><li>Enable Upscaled Video Show/Save – Displays and saves the upscaled video.</li></ul>

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