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# VNStatefulRequest

An abstract request type that builds evidence of a condition over time.

```
class VNStatefulRequest
```

## Topics

### Initializing a Request

[`init(frameAnalysisSpacing:completionHandler:)`](/documentation/Vision/VNStatefulRequest/init(frameAnalysisSpacing:completionHandler:))

Initializes a video-based request.

### Configuring the Request

[`minimumLatencyFrameCount`](/documentation/Vision/VNStatefulRequest/minimumLatencyFrameCount)

The minimum number of frames a request processes before reporting an observation.

[`frameAnalysisSpacing`](/documentation/Vision/VNStatefulRequest/frameAnalysisSpacing)

A time value that indicates the interval between analysis operations.


---

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