---
title: kCMSampleBufferConduitNotificationParameter_UpcomingOutputPTSRangeMayOverlapQueuedOutputPTSRange
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmsamplebufferconduitnotificationparameter_upcomingoutputptsrangemayoverlapqueuedoutputptsrange
---

# kCMSampleBufferConduitNotificationParameter_UpcomingOutputPTSRangeMayOverlapQueuedOutputPTSRange

Indicates that the presentation timestamps of upcoming output samples may overlap those of samples queued for output (type CFBoolean).

## Declaration

```swift
let kCMSampleBufferConduitNotificationParameter_UpcomingOutputPTSRangeMayOverlapQueuedOutputPTSRange: CFString
```

## Discussion

Discussion This key is always present in the userInfo dictionary for the kCMSampleBufferConduitNotification_UpcomingOutputPTSRangeChanged notification. If its value is kCFBooleanTrue, there is a possibility that upcoming frames may have earlier presentation timestamps than the frames previously provided to the conduit, and the dictionary also contains one or both of the kCMSampleBufferConduitNotificationParameter_MinUpcomingOutputPTS or kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS keys providing further information. If its value is kCFBooleanFalse, there is no such possibility.

## 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_MinUpcomingOutputPTS](coremedia/kcmsamplebufferconduitnotificationparameter_minupcomingoutputpts.md)
- [kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS](coremedia/kcmsamplebufferconduitnotificationparameter_maxupcomingoutputpts.md)
- [kCMSampleBufferConduitNotificationParameter_ResumeTag](coremedia/kcmsamplebufferconduitnotificationparameter_resumetag.md)