---
title: "VTFrameSiloGetProgressOfCurrentPass(_:progressOut:)"
framework: videotoolbox
role: symbol
role_heading: Function
path: "videotoolbox/vtframesilogetprogressofcurrentpass(_:progressout:)"
---

# VTFrameSiloGetProgressOfCurrentPass(_:progressOut:)

Gets the progress of the current pass.

## Declaration

```swift
func VTFrameSiloGetProgressOfCurrentPass(_ silo: VTFrameSilo, progressOut: UnsafeMutablePointer<Float32>) -> OSStatus
```

## Parameters

- `silo`: The frame silo object.
- `progressOut`: Upon return, contains the progress of the current pass.

## Return Value

Return Value kVTFrameSiloInvalidTimeRangeErr if any time ranges are non-numeric, overlap or are not in ascending order.

## Discussion

Discussion Calculates the current progress based on the most recent sample buffer added and the current pass time ranges.

## See Also

### Inspecting Frame Silos

- [VTFrameSiloGetTypeID()](videotoolbox/vtframesilogettypeid().md)