---
title: kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmsamplebufferconduitnotificationparameter_maxupcomingoutputpts
---

# kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS

Specifies the maximum presentation timestamp of upcoming output samples (type CFDictionary).

## Declaration

```swift
let kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS: CFString
```

## Discussion

Discussion This key may be present in the userInfo dictionary for the kCMSampleBufferConduitNotification_UpcomingOutputPTSRangeChanged notification in cases where upcoming frames may have earlier timestamps than those previously provided. Its value is the CFDictionary representation of a CMTime object (see CMTimeMakeFromDictionary(_:)). Either this key or kCMSampleBufferConduitNotificationParameter_MinUpcomingOutputPTS may be omitted to leave the range open-ended.

## See Also

### Sample Buffer Conduit Notifications

- [kCMSampleBufferConduitNotification_ResetOutput](coremedia/kcmsamplebufferconduitnotification_resetoutput.md)
- [kCMSampleBufferConduitNotification_InhibitOutputUntil](coremedia/kcmsamplebufferconduitnotification_inhibitoutputuntil.md)
- [kCMSampleBufferConduitNotification_UpcomingOutputPTSRangeChanged](coremedia/kcmsamplebufferconduitnotification_upcomingoutputptsrangechanged.md)
- [kCMSampleBufferConduitNotificationParameter_UpcomingOutputPTSRangeMayOverlapQueuedOutputPTSRange](coremedia/kcmsamplebufferconduitnotificationparameter_upcomingoutputptsrangemayoverlapqueuedoutputptsrange.md)
- [kCMSampleBufferConduitNotificationParameter_MinUpcomingOutputPTS](coremedia/kcmsamplebufferconduitnotificationparameter_minupcomingoutputpts.md)
- [kCMSampleBufferConduitNotificationParameter_ResumeTag](coremedia/kcmsamplebufferconduitnotificationparameter_resumetag.md)