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# flush()

Discards all pending enqueued sample buffers.

```
func flush()
```

## Discussion

It is not possible to determine which sample buffers have been decoded for video. The next frame passed to [`enqueue(_:)`](/documentation/AVFoundation/AVQueuedSampleBufferRendering/enqueue(_:)) should be an IDR frame (also known as a key frame or sync sample).

---

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