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# pixelBufferPool

A pixel buffer pool that vends and efficiently recycles the pixel buffers of tagged buffer groups.

```
var pixelBufferPool: CVPixelBufferPool? { get }
```

## Discussion

For maximum efficiency, create the pixel buffers of tagged buffer groups using this pool with the <doc://com.apple.documentation/documentation/CoreVideo/CVPixelBufferPoolCreatePixelBuffer(_:_:_:)> function.

The value of this property is `nil` before you call [`startWriting()`](/documentation/AVFoundation/AVAssetWriter/startWriting()) on the associated [`AVAssetWriter`](/documentation/AVFoundation/AVAssetWriter) object. Query this property after writing starts to retrieve a `non-nil` value.

This property is not key value observable.

---

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