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# markConfigurationAsFinal()

Tells the output that it’s finished reconfiguring time ranges, and allows the asset reader to advance to a completed state.

```
func markConfigurationAsFinal()
```

## Discussion

When the value of the [`supportsRandomAccess`](/documentation/AVFoundation/AVAssetReaderOutput/supportsRandomAccess) property is <doc://com.apple.documentation/documentation/Swift/true>, the asset reader doesn’t advance to an [`AVAssetReader.Status.completed`](/documentation/AVFoundation/AVAssetReader/Status-swift.enum/completed) state until you call this method.

After you call this method, you can’t make further calls to the [`reset(forReadingTimeRanges:)`](/documentation/AVFoundation/AVAssetReaderOutput/reset(forReadingTimeRanges:)) method.

When the destination of the output’s media data is an [`AVAssetWriterInput`](/documentation/AVFoundation/AVAssetWriterInput) that you configure for multi-pass encoding, an appropriate time to call this method is after the asset writer input indicates that it doesn’t require performing additional passes.

---

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