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# pixelBufferPool

A pool of pixel buffers to append to the adaptor’s input.

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

## Discussion

For maximum efficiency, you should create <doc://com.apple.documentation/documentation/CoreVideo/cvpixelbuffer-q2e> objects for [`append(_:withPresentationTime:)`](/documentation/AVFoundation/AVAssetWriterInputPixelBufferAdaptor/append(_:withPresentationTime:)) by using this pool with the <doc://com.apple.documentation/documentation/CoreVideo/CVPixelBufferPoolCreatePixelBuffer(_:_:_:)> function.

This value is `nil` prior to calling [`startSession(atSourceTime:)`](/documentation/AVFoundation/AVAssetWriter/startSession(atSourceTime:))on the associated [`AVAssetWriter`](/documentation/AVFoundation/AVAssetWriter) object.

This property is key-value observable.

---

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