---
title: presentationTimeStamp
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmsamplebuffer/presentationtimestamp
---

# presentationTimeStamp

The sample presentation timestamp that’s the earliest numerically in the sample buffer.

## Declaration

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

## Discussion

Discussion For in-presentation-order samples, the value represents the presentation timestamp of the first sample. For out-of-presentation-order samples, it represents the presentation timestamp of the sample the system presents first, which isn’t necessarily the first sample in the buffer. This value is invalid if there’s an error.

## See Also

### Inspecting Duration and Timing

- [duration](coremedia/cmsamplebuffer/duration.md)
- [decodeTimeStamp](coremedia/cmsamplebuffer/decodetimestamp.md)
- [outputDuration](coremedia/cmsamplebuffer/outputduration.md)
- [outputDecodeTimeStamp](coremedia/cmsamplebuffer/outputdecodetimestamp.md)
- [outputPresentationTimeStamp](coremedia/cmsamplebuffer/outputpresentationtimestamp.md)
- [setOutputPresentationTimeStamp(_:)](coremedia/cmsamplebuffer/setoutputpresentationtimestamp(_:).md)
- [sampleTimingInfos()](coremedia/cmsamplebuffer/sampletiminginfos().md)
- [sampleTimingInfo(at:)](coremedia/cmsamplebuffer/sampletiminginfo(at:).md)
- [outputSampleTimingInfos()](coremedia/cmsamplebuffer/outputsampletiminginfos().md)