# VTFrameSiloSetTimeRangesForNextPass(_:timeRangeCount:timeRangeArray:) Begins a new pass of samples to be added to a frame silo object. ``` func VTFrameSiloSetTimeRangesForNextPass(_ silo: VTFrameSilo, timeRangeCount: CMItemCount, timeRangeArray: UnsafePointer) -> OSStatus ``` ## Parameters `silo` The frame silo object. `timeRangeCount` The count of time ranges in `timeRangeArray`. `timeRangeArray` The array of `CMTimeRange` structs. ## Return Value `kVTFrameSiloInvalidTimeRangeErr` if any time ranges are non-numeric, overlap, or are not in ascending order. ## Discussion Previously added sample buffers with decode timestamps within the time ranges are deleted from the frame silo object. > Note: > It’s not necessary to call this function before adding sample buffers for the first pass. --- 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)