# CMSampleBufferGetOutputSampleTimingInfoArray(_:entryCount:arrayToFill:entriesNeededOut:) Retrieves an array of output timing information structures that represents each sample in a sample buffer. ``` func CMSampleBufferGetOutputSampleTimingInfoArray(_ sbuf: CMSampleBuffer, entryCount timingArrayEntries: CMItemCount, arrayToFill timingArrayOut: UnsafeMutablePointer?, entriesNeededOut timingArrayEntriesNeededOut: UnsafeMutablePointer?) -> OSStatus ``` ## Parameters `sbuf` The `CMSampleBuffer` being interrogated. `timingArrayEntries` Number of entries in timing array. `timingArrayOut` On output, points to an array of `CMSampleTimingInfo` structs to receive the timing info. `timingArrayEntriesNeededOut` Number of entries needed for the result. ## Return Value A result code. See [Sample Buffer Error Codes](/documentation/CoreMedia/sample-buffer-errors). ## Discussion If only one [`CMSampleTimingInfo`](/documentation/CoreMedia/CMSampleTimingInfo) struct is returned, it applies to all samples in the buffer.See documentation of [`CMSampleTimingInfo`](/documentation/CoreMedia/CMSampleTimingInfo) for details of how a single `CMSampleTimingInfo` struct can apply to multiple samples. The `timingArrayOut` must be allocated by the caller, and the number of entries allocated must be passed in `timingArrayEntries`. If `timingArrayOut` is `NULL`, `timingArrayEntriesNeededOut` will return the required number of entries. Similarly, if `*timingArrayEntriesNeededOut` is too small, [`CMSampleBuffer`](/documentation/CoreMedia/CMSampleBuffer) will be returned, and `timingArrayEntriesNeededOut` will return the required number of entries. In either case, the caller can then make an appropriately-sized `timingArrayOut` and call again. For example, the caller might pass the address of a `CMSampleTimingInfo` struct on the stack (as timingArrayOut), and 1 as `timingArrayEntries`. If all samples are describable with a single `CMSampleTimingInfo` struct (or there’s only one sample in the `CMSampleBuffer`), this call will succeed. If not, it will fail, and will return the number of entries required in `timingArrayEntriesNeededOut`. Only in this case will the caller actually need to allocate an array. If there’s no timingInfo in this `CMSampleBuffer`, [`CMSampleBuffer`](/documentation/CoreMedia/CMSampleBuffer) will be returned, and `*timingArrayEntriesNeededOut` will be set to 0. --- 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)