---
title: "startRealtimeSampleDelivery(session:)"
framework: mediadevice
role: symbol
role_heading: Instance Method
path: "mediadevice/realtimesamplehandling/startrealtimesampledelivery(session:)"
---

# startRealtimeSampleDelivery(session:)

Called when the extension can receive realtime samples.

## Declaration

```swift
@MainActor func startRealtimeSampleDelivery(session: MediaOutputSession)
```

## Parameters

- `session`: The session associated with the sample delivery.

## Mentioned in

Creating a media device extension