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# realTimePlayback

A Boolean value that hints to the decoder to use a low-power mode that can’t decode faster than 1x real-time.

```
var realTimePlayback: Bool { get set }
```

## Discussion

The system sets this value to <doc://com.apple.documentation/documentation/Swift/false> during all uses other than 1x forward real-time playback, including seeking, playback at other rates, and export.

This hint only applies to the current decode session. If multiple instances of a decoder operate at the same time, it may not be acceptable to use a low-power mode if the system can’t sustain real-time playback across all the streams.

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