---
title: kCVIndefiniteTime
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvindefinitetime
---

# kCVIndefiniteTime

An unknown or indefinite time. For example, CVDisplayLinkGetNominalOutputVideoRefreshPeriod(_:) returns kCVIndefiniteTime if the display link specified is not valid.

## Declaration

```swift
let kCVIndefiniteTime: CVTime
```

## See Also

### Constants

- [kCVZeroTime](corevideo/kcvzerotime.md)