# createMetadataSampleBuffer(from:associatedWithPresentationTimeStamp:) Creates a sample buffer containing Timecode Media Description metadata for integration with a video track. ``` static func createMetadataSampleBuffer(from timecode: AVCaptureTimecode, associatedWithPresentationTimeStamp presentationTimeStamp: CMTime) -> Unmanaged? ``` ## Parameters `timecode` The [`AVCaptureTimecode`](/documentation/AVFoundation/AVCaptureTimecode) instance providing the timecode details to encode. `presentationTimeStamp` The presentation time stamp that determines the exact moment in the media timeline where the metadata should be applied. It is embedded in the sample timing info (`CMSampleTimingInfo`) and ensures that the packaged metadata synchronizes accurately with the corresponding video frame. ## Return Value A `CMSampleBufferRef` with the encoded Timecode Media Description metadata for video synchronization, or `nil` if sample buffer creation fails. --- 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)