# createMetadataSampleBuffer(from:forDuration:) Creates a sample buffer containing Timecode Media Description metadata for a specified duration. ``` static func createMetadataSampleBuffer(from timecode: AVCaptureTimecode, forDuration duration: CMTime) -> Unmanaged? ``` ## Parameters `timecode` The [`AVCaptureTimecode`](/documentation/AVFoundation/AVCaptureTimecode) instance providing the timecode details for the metadata sample. `duration` The duration that the metadata sample buffer should represent. ## Return Value A `CMSampleBufferRef` with encoded Timecode Media Description metadata for the given duration, or `nil` if sample buffer creation fails. ## Discussion Use this function for scenarios where timecode metadata needs to span a custom interval (not just a single frame), such as non-frame-accurate workflows or for describing a segment of media with a consistent timecode. --- Copyright © 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)