---
title: extrinsicOriginSource
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmformatdescription/extensions-swift.struct/value/cameracalibrationdatalenscollection/calibration/extrinsicoriginsource
---

# extrinsicOriginSource

Identifies how the origin of the camera system’s extrinsics are determined.

## Declaration

```swift
var extrinsicOriginSource: CMFormatDescription.Extensions.Value.CameraCalibrationDataLensCollection.ExtrinsicOriginSource
```