为什么在comfyui上面用wan2.2 s2v生成的视频最前面4帧是模糊的，由最模糊变清晰

### Custom Node Testing

- [x] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

为什么在comfyui上面用wan2.2 s2v生成的视频最前面4帧是模糊的，由最模糊变清晰

### Actual Behavior

为什么在comfyui上面用wan2.2 s2v生成的视频最前面4帧是模糊的，由最模糊变清晰

### Steps to Reproduce

为什么在comfyui上面用wan2.2 s2v生成的视频最前面4帧是模糊的，由最模糊变清晰

### Debug Logs

```powershell
为什么在comfyui上面用wan2.2 s2v生成的视频最前面4帧是模糊的，由最模糊变清晰
```

### Other

_No response_