---
title: "CMBufferQueueGetMinPresentationTimeStamp(_:)"
framework: coremedia
role: symbol
role_heading: Function
path: "coremedia/cmbufferqueuegetminpresentationtimestamp(_:)"
---

# CMBufferQueueGetMinPresentationTimeStamp(_:)

Gets the earliest presentation timestamp of a buffer queue.

## Declaration

```swift
func CMBufferQueueGetMinPresentationTimeStamp(_ queue: CMBufferQueue) -> CMTime
```

## Parameters

- `queue`: CMBufferQueue being interrogated.

## Return Value

Return Value The earliest presentation timestamp of the interrogated CMBufferQueue.

## Discussion

Discussion The search for earliest presentation timstamp is performed in                this API. If you know your queue is sorted by presentation time,                CMBufferQueueGetBufferCount(_:) is a faster alternative. If the                getPresentationTimeStamp callback is NULL, kCMTimeInvalid will                be returned.

## See Also

### Inspecting Duration and Timing

- [CMBufferQueueGetDuration(_:)](coremedia/cmbufferqueuegetduration(_:).md)
- [CMBufferQueueGetMinDecodeTimeStamp(_:)](coremedia/cmbufferqueuegetmindecodetimestamp(_:).md)
- [CMBufferQueueGetFirstDecodeTimeStamp(_:)](coremedia/cmbufferqueuegetfirstdecodetimestamp(_:).md)
- [CMBufferQueueGetFirstPresentationTimeStamp(_:)](coremedia/cmbufferqueuegetfirstpresentationtimestamp(_:).md)
- [CMBufferQueueGetEndPresentationTimeStamp(_:)](coremedia/cmbufferqueuegetendpresentationtimestamp(_:).md)
- [CMBufferQueueGetMaxPresentationTimeStamp(_:)](coremedia/cmbufferqueuegetmaxpresentationtimestamp(_:).md)
- [CMBufferQueueGetCallbacksForSampleBuffersSortedByOutputPTS()](coremedia/cmbufferqueuegetcallbacksforsamplebufferssortedbyoutputpts().md)
- [CMBufferQueueGetCallbacksForUnsortedSampleBuffers()](coremedia/cmbufferqueuegetcallbacksforunsortedsamplebuffers().md)