---
title: invalid
framework: coremedia
role: symbol
role_heading: Type Property
path: coremedia/cmtimemapping/invalid
---

# invalid

An invalid time mapping.

## Declaration

```swift
static let invalid: CMTimeMapping
```

## See Also

### Constants

- [kCMTimeMappingSourceKey](coremedia/kcmtimemappingsourcekey.md)
- [kCMTimeMappingTargetKey](coremedia/kcmtimemappingtargetkey.md)