---
title: durationOffset
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcaptionconversiontimerangeadjustment/durationoffset
---

# durationOffset

The time value by which the system offsets the durations of captions to correct a problem.

## Declaration

```swift
var durationOffset: CMTime { get }
```

## Discussion

Discussion The value may any numeric value, positive, negative, or zero.

## See Also

### Accessing time offsets

- [startTimeOffset](avfoundation/avcaptionconversiontimerangeadjustment/starttimeoffset.md)