# Adopt AVCaptureDeviceRotationCoordinator

> Rotation must stay correct as your app moves between the inner and outer displays. Adopting the coordinator also unlocks a performance win.

Source: https://iphoneduosupport.com/checklist/camera-rotation-coordinator/

Severity: major
Category: camera
Applies to: swiftui, uikit
Requires: ios-27.1 SDK
Symptom: Captured photos or video come out rotated, or preview orientation disagrees with the saved file.
Sources: https://developer.apple.com/videos/play/tech-talks/111465/
Last verified: 2026-09-09

---

`AVCaptureDeviceRotationCoordinator` keeps capture orientation correct, and on iPhone Duo it updates as your app moves between displays — a transition that did not exist on any previous iPhone.

## Adopt the coordinator

Adopt it for all capture outputs, then turn off the compatibility path it replaces:

```swift
class AVCapturePhotoOutput: AVCaptureOutput {
    var isCameraSensorOrientationCompensationEnabled: Bool { get set }
}
```

Apple's guidance is to adopt the rotation coordinator **and then disable sensor orientation compensation**, which is a real performance gain: the system stops rotating buffers to compensate.

Order matters. Disabling compensation before the coordinator is correctly wired gives you rotated output. Adopt first, verify, then disable.

## Preview layout

Two settings control how the preview fills a display that is a different shape from the sensor:

```swift
class AVCaptureVideoPreviewLayer {
    var videoGravity: AVLayerVideoGravity { get set }
}

class AVCaptureDevice {
    var dynamicAspectRatio: AVCaptureDevice.AspectRatio? { get }
}
```

Both front cameras have **square sensors** with an ultrawide field of view, so there is real latitude in what you present. Use `dynamicAspectRatio` on the ultrawide cameras to pick a landscape aspect ratio and fill the display.

Apple also recommends mirroring the preview when a rear camera is facing the subject, so a user framing a selfie on the cover display sees the mirrored image they expect.

## How to verify

Capture a photo and a video in every pose and on both displays. Check orientation in the preview, in the saved file, and after sharing to another app. Rotate mid-recording and confirm the result is still correct.

---

Published by iPhone Duo Support (https://iphoneduosupport.com). Not affiliated with Apple Inc.