---
title: CVImageFieldDetail.temporalBottomFirst
framework: corevideo
role: symbol
role_heading: Case
path: corevideo/cvimagefielddetail/temporalbottomfirst
---

# CVImageFieldDetail.temporalBottomFirst

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

## Declaration

```swift
case temporalBottomFirst
```