<!--
{
  "availability" : [
    "iOS: 5.0.0 -",
    "iPadOS: 5.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.8.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 6.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreMedia",
  "identifier" : "/documentation/CoreMedia/kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "Core Media"
    ],
    "preciseIdentifier" : "c:@kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS"
  },
  "title" : "kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS"
}
-->

# kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS

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

```
let kCMSampleBufferConduitNotificationParameter_MaxUpcomingOutputPTS: CFString
```

## Discussion

This key may be present in the `userInfo` dictionary for the [`kCMSampleBufferConduitNotification_UpcomingOutputPTSRangeChanged`](/documentation/CoreMedia/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(_:)`](/documentation/CoreMedia/CMTimeMakeFromDictionary(_:))).

Either this key or [`kCMSampleBufferConduitNotificationParameter_MinUpcomingOutputPTS`](/documentation/CoreMedia/kCMSampleBufferConduitNotificationParameter_MinUpcomingOutputPTS) may be omitted to leave the range open-ended.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)