Guide
ComfyUI Samplers Guide for Video Generation
Understand the different samplers, their strengths, limitations, and when to use each for optimal video generation results.
What You'll Learn
- How samplers differ in speed vs. quality tradeoffs
- Which samplers work best for video generation
- When to use ancestral vs. deterministic samplers
- How schedulers modify sampler behavior
🎨 Sampler Categories
Fast & Simple (Good for Quick Iterations)
- Euler — Fastest, good quality. Great for testing prompts.
- Euler A (Ancestral) — Adds creative variation. Slower but more interesting results.
- UniPC — Very fast at low steps (5-10). Needs 20+ steps for quality.
High Quality (When You Need the Best)
- DPM++ 2M — Excellent quality, good speed. Best overall for images.
- DPM++ 2M Karras — DPM++ with Karras scheduler. Smoother transitions.
- DDIM — Deterministic, consistent. Great for video consistency.
Specialized
- LCM — Latent Consistency Models. Extremely fast (4-8 steps).
- DPM++ SDE — Slower but good for photorealism.
- Heun — Balanced speed and quality.
📊 Sampler Comparison Table
| Sampler | Speed | Quality | Best Steps | Use Case |
|---|
| Euler | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | 15-25 | Quick previews, testing |
| Euler A | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | 20-30 | Creative variations |
| UniPC | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | 20-30 | Fast generation, upscaling |
| DDIM | ⭐⭐⭐ | ⭐⭐⭐⭐ | 25-45 | Video, consistency |
| DPM++ 2M | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | 20-30 | High quality images |
| DPM++ 2M Karras | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | 20-30 | Smooth gradients |
| LCM | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | 4-8 | Real-time, quick drafts |
🏆 Video Recommendation: DDIM or Euler A
For video generation, DDIM provides the most consistent frame-to-frame results. Euler A adds beneficial variation between frames.
🎬 Video Generation Specific Advice
For Photorealistic Video
- DDIM with
ddim_uniform scheduler — Best for consistent motion
- Euler A with
normal scheduler — More creative, natural movement
- DPM++ 2M with
karras — Higher quality but slower
For Animation/Stylized Video
- Euler A — Adds interesting variations between frames
- DPM++ SDE — Good for artistic styles
For Fast Drafts
- LCM — 4-8 steps, good for testing timing
- UniPC — 10-15 steps for quick iterations
⚠️ Video-Specific Tips:
- Higher steps (25-35) generally produce smoother motion
- Lower CFG (3-4) reduces flickering between frames
- DDIM is preferred for Wan 2.1/2.1 video workflows
✅ Final Recommendations
| Goal | Sampler | Scheduler | Steps |
|---|
| Consistent video frames | DDIM | ddim_uniform | 25-35 |
| Natural movement | Euler A | normal | 25-30 |
| High quality stills | DPM++ 2M | karras | 20-25 |
| Quick drafts | LCM | normal | 4-8 |
| Low VRAM | UniPC | simple | 15-20 |