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# actualThreadCount

The actual number of threads the decoder uses.

```
optional var actualThreadCount: Int { get }
```

## Discussion

The system queries this property on the extension when <doc://com.apple.documentation/documentation/VideoToolbox> queries the <doc://com.apple.documentation/documentation/VideoToolbox/kVTDecompressionPropertyKey_ThreadCount> on the hosting <doc://com.apple.documentation/documentation/VideoToolbox/VTDecompressionSession>.

---

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