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# streamSinkEndOfData

A property key for a Boolean value that indicates whether the stream has more data.

```
static let streamSinkEndOfData: CMIOExtensionProperty
```

## Discussion

The property state for this property is a number that represents a Boolean value: `1` indicates the stream is at its end, and `0` indicates that more data exists.

The value of this property matches the [`kCMIOStreamPropertyEndOfData`](/documentation/CoreMediaIO/kCMIOStreamPropertyEndOfData) property.

---

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