<!--
{
  "availability" : [
    "iOS: 13.0.0 -",
    "iPadOS: 13.0.0 -",
    "macCatalyst: -",
    "macOS: 10.15.0 -",
    "tvOS: 13.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 6.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreMedia",
  "identifier" : "/documentation/CoreMedia/CMSampleBuffer/outputDuration",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Core Media",
      "CoreMedia"
    ],
    "preciseIdentifier" : "s:So17CMSampleBufferRefa9CoreMediaE14outputDurationSo6CMTimeavp"
  },
  "title" : "outputDuration"
}
-->

# outputDuration

The output duration of the sample buffer.

```
var outputDuration: CMTime { get }
```

## Discussion

This value is the duration minus any trimmed duration divided by multiplier:

`(Duration - TrimDurationAtStart - TrimDurationAtEnd) / SpeedMultiplier`

This value is [`invalid`](/documentation/CoreMedia/CMTime/invalid) if there’s an error.

``

---

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)