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# VTMotionEstimationSession

```
final class VTMotionEstimationSession
```

## Topics

### Creating a motion estimation session

[`init(width: UInt32, height: UInt32, motionVectorSize: VTMotionEstimationSession.BlockSize, useMultiPassSearch: Bool, label: String?) throws`](/documentation/VideoToolbox/VTMotionEstimationSession/init(width:height:motionVectorSize:useMultiPassSearch:label:))

### Estimating motion

[`func motion(of: CVReadOnlyPixelBuffer, comparedTo: CVReadOnlyPixelBuffer, flags: VTMotionEstimationSession.FrameFlags) async throws -> VTMotionEstimationSession.Motion`](/documentation/VideoToolbox/VTMotionEstimationSession/motion(of:comparedTo:flags:))

[`struct FrameFlags`](/documentation/VideoToolbox/VTMotionEstimationSession/FrameFlags)

### Inspecting the session

[`var label: String?`](/documentation/VideoToolbox/VTMotionEstimationSession/label)

[`var motionVectorSize: VTMotionEstimationSession.BlockSize`](/documentation/VideoToolbox/VTMotionEstimationSession/motionVectorSize)

[`var sourcePixelBufferAttributes: [String : any Sendable]`](/documentation/VideoToolbox/VTMotionEstimationSession/sourcePixelBufferAttributes)

[`var useMultiPassSearch: Bool`](/documentation/VideoToolbox/VTMotionEstimationSession/useMultiPassSearch)

### Inspecting the motion result

[`struct Motion`](/documentation/VideoToolbox/VTMotionEstimationSession/Motion)

[`enum BlockSize`](/documentation/VideoToolbox/VTMotionEstimationSession/BlockSize)

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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