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# CMTimeRoundingMethod.quickTime

Rounds using the QuickTime method.

```
case quickTime
```

## Discussion

This method uses [`CMTimeRoundingMethod.roundTowardZero`](/documentation/CoreMedia/CMTimeRoundingMethod/roundTowardZero) if converting from larger to smaller scale (more precision to less precision), but uses [`CMTimeRoundingMethod.roundAwayFromZero`](/documentation/CoreMedia/CMTimeRoundingMethod/roundAwayFromZero) if converting from smaller to larger scale (less precision to more precision).

This method never rounds a negative number down to `0`, but instead returns the smallest magnitude negative time (`-1 / newTimescale`).

---

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