---
title: startStream()
framework: coremediaio
role: symbol
role_heading: Instance Method
path: coremediaio/cmioextensionstreamsource/startstream()
---

# startStream()

Starts the stream of media data.

## Declaration

```swift
func startStream() throws
```

## See Also

### Managing a Stream

- [authorizedToStartStream(for:)](coremediaio/cmioextensionstreamsource/authorizedtostartstream(for:).md)
- [stopStream()](coremediaio/cmioextensionstreamsource/stopstream().md)