---
title: "CMTIME_IS_INVALID(_:)"
framework: coremedia
role: symbol
role_heading: Function
path: "coremedia/cmtime_is_invalid(_:)"
---

# CMTIME_IS_INVALID(_:)

Returns a Boolean value that indicates whether a given time is invalid.

## Declaration

```swift
func CMTIME_IS_INVALID(_ time: CMTime) -> Bool
```

## Parameters

- `time`: A time value to test.

## Return Value

Return Value true if the time is invalid; otherwise, false.

## See Also

### Inspecting a Time

- [CMTimeGetSeconds(_:)](coremedia/cmtimegetseconds(_:).md)
- [CMTimeAbsoluteValue(_:)](coremedia/cmtimeabsolutevalue(_:).md)
- [CMTIME_IS_VALID(_:)](coremedia/cmtime_is_valid(_:).md)
- [CMTIME_IS_POSITIVEINFINITY(_:)](coremedia/cmtime_is_positiveinfinity(_:).md)
- [CMTIME_IS_NEGATIVEINFINITY(_:)](coremedia/cmtime_is_negativeinfinity(_:).md)
- [CMTIME_IS_INDEFINITE(_:)](coremedia/cmtime_is_indefinite(_:).md)
- [CMTIME_IS_NUMERIC(_:)](coremedia/cmtime_is_numeric(_:).md)
- [CMTIME_HAS_BEEN_ROUNDED(_:)](coremedia/cmtime_has_been_rounded(_:).md)