---
title: CVImageFieldDetail.temporalTopFirst
framework: corevideo
role: symbol
role_heading: Case
path: corevideo/cvimagefielddetail/temporaltopfirst
---

# CVImageFieldDetail.temporalTopFirst

The image buffer contains complete fields in alternating order. The top, odd-numbered, fields contain image data captured at an earlier time than bottom, even-numbered, fields.

## Declaration

```swift
case temporalTopFirst
```