Complete Guide
Wan 2.2 Long Video Generation
Everything you need to create sustained, continuous videos longer than 5 seconds using Wan 2.2 in ComfyUI. Includes SVI 2.0 PRO, official workflows, and step-by-step instructions.
📋 Prerequisites
1. ComfyUI Installation
Ensure you have the latest ComfyUI installed. You'll need these custom nodes:
- ComfyUI-WanVideoWrapper — Required for Wan 2.2 support
- ComfyUI-manager — For easy node management
- ComfyUI-VideoHelperSuite — For video output handling
Install via ComfyUI Manager: Search for "WanVideo" and install all related packages.
2. Required Models
| Model | Size | Where to Get |
|---|
| wan2.2_i2v_14b_fp8.safetensors | ~14GB | HuggingFace |
| umt5_xxl_fp8_e4m3fn_scaled.safetensors | ~5GB | Part of WanVideoWrapper |
| wan_2.1_vae.safetensors | ~300MB | Part of WanVideoWrapper |
| SVI v2 PRO LoRA (optional) | ~500MB | CivitAI |
⚠️ VRAM Requirement: 16GB recommended for long videos. 12GB may work with shorter clips or quantized models.
🛠️ Methods for Long Video
| Method | Length | Difficulty | Quality | Speed |
|---|
| SVI 2.0 PRO | Infinite | Medium | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Official I2V | 5-10s | Easy | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Multi-Clip | 10-20s | Medium | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Frame Chaining | Unlimited | Hard | ⭐⭐⭐ | ⭐⭐ |
🏆 Recommended: SVI 2.0 PRO
Best for seamless infinite videos with no visible transitions. Uses Stable Video Infinity technology.
🚀 SVI 2.0 PRO Method (Best for Infinite Video)
What is SVI?
Stable Video Infinity (SVI) 2.0 PRO allows continuous, seamless video generation without visible transitions. Uses only 4-8 steps per segment for incredible speed.
Option 1: Download Workflow JSON
Multiple sources provide the SVI 2.0 PRO workflow:
Option 2: Install via ComfyUI Manager
- 1Open ComfyUI Manager
- 2Search for "Stable Video Infinity" or "SVI"
- 3Install the SVI custom nodes
- 4Restart ComfyUI
- 5Search "SVI Wan" in template Browser
SVI 2.0 PRO Key Settings
| Setting | Recommended | Notes |
|---|
| CFG Scale | 1.2 - 1.8 | Lower than normal (normal is 3-5) |
| Shift | 6 - 10 | Controls motion coherence |
| Steps | 4 - 8 | SVI is fast! 4 steps = good, 8 = better |
| Sampler | Euler | Simple, fast, works well |
| Scheduler | Simple | NOT karras or normal |
Step-by-Step SVI Workflow
- 1Load your starting image (512x512 or 768x768 recommended)
- 2Set total frames (e.g., 16fps × 10s = 160 frames)
- 3Configure SVI settings: CFG=1.5, Shift=8, Steps=6
- 4Write your prompt describing CONTINUOUS action
- 5Click "Run" and watch infinite video generate
⚠️ Important SVI Tips:
- Describe MOTION per TIME, not per action: "A person walking forward continuously for 20 seconds" not "person walks, then runs, then stops"
- Lower CFG is critical (1.5-1.8 works best)
- Higher shift (8-10) = smoother motion but more VRAM
📦 Official Wan 2.2 Workflow
Method 1: Built-in Template
- 1Open ComfyUI
- 2Menu:
Workflow → Browse Templates → Video
- 3Select
Wan2.2 14B I2V or Wan2.2 14B T2V
- 4Load your source image (for I2V)
- 5Configure settings
- 6Press
Ctrl+Enter to run
Method 2: Manual Setup
Official Workflow Key Settings
| Setting | Recommended | Notes |
|---|
| Steps | 25 - 35 | Higher = better quality |
| CFG Scale | 3.5 - 5 | 5 = strict prompt following |
| Sampler | Euler A or DDIM | Euler A = creative, DDIM = consistent |
| Scheduler | Normal or Karras | Karras = smoother transitions |
| FPS | 16 - 24 | 16 = longer video, 24 = smoother |
⚙️ Complete Settings Reference
For 5-10 Second Videos (Basic)
- Steps: 25-30
- CFG: 4-5
- Sampler: Euler A
- Scheduler: Normal
- FPS: 16
For 10-20 Second Videos (Extended)
- Steps: 30-35
- CFG: 3.5-4
- Sampler: DDIM
- Scheduler: Karras
- FPS: 16
For Infinite Videos (SVI)
- Steps: 4-8
- CFG: 1.5-1.8
- Sampler: Euler
- Scheduler: Simple
- Shift: 6-10
Frame Calculations
| Duration | 16 FPS | 24 FPS |
|---|
| 5 seconds | 80 frames | 120 frames |
| 10 seconds | 160 frames | 240 frames |
| 15 seconds | 240 frames | 360 frames |
| 20 seconds | 320 frames | 480 frames |
🛠️ Troubleshooting
| Problem | Solution |
|---|
| Video repeats every 5 seconds | Use SVI 2.0 PRO method for continuous motion |
| Out of memory errors | Reduce resolution, use FP8 models, or enable model offloading |
| Poor motion quality | Increase shift value (6-10), describe continuous action in prompt |
| Black frames | Check VAE settings, ensure image dimensions are divisible by 16 |
| SVI not working | Ensure you have latest ComfyUI + WanVideoWrapper + SVI nodes |
| Slow generation | SVI is fast (4-8 steps). If slow, reduce steps or use FP8 model |
🔗 All Important Links
Workflows & Templates
Tutorials
Models & LoRAs