# playbackSession

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.PlaybackSessionDelegate.method-playbackSession/

playbackSession
Called on the main queue each time a new playback frame is ready. Use the frame's metadata, image, and optional depth for rendering or processing.

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## Declaration

func playbackSession(_ session: PlaybackSession, didUpdate frame: PlaybackFrame)

#### Summary

Called on the main queue each time a new playback frame is ready. Use the frame's metadata, image, and optional depth for rendering or processing.

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| session | PlaybackSession | - |
| frame | PlaybackFrame | - |

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## Overload

func playbackSession(_ session: PlaybackSession, cameraDidChangeTrackingState camera: PlaybackCamera)

#### Summary

Called on the main queue when the tracking state changes (e.g. at start of playback). For playback, state is typically .normal.

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| session | PlaybackSession | - |
| frame | PlaybackFrame | - |

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