---
title: kCVImageBufferFieldDetailTemporalTopFirst
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebufferfielddetailtemporaltopfirst
---

# kCVImageBufferFieldDetailTemporalTopFirst

A key to the temporal top first detail field of the image buffer.

## Declaration

```swift
let kCVImageBufferFieldDetailTemporalTopFirst: CFString
```

## Discussion

Discussion The temporal top first detail field value is of type CFString. 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.

## See Also

### Constants

- [kCVImageBufferFieldDetailTemporalBottomFirst](corevideo/kcvimagebufferfielddetailtemporalbottomfirst.md)
- [kCVImageBufferFieldDetailSpatialFirstLineEarly](corevideo/kcvimagebufferfielddetailspatialfirstlineearly.md)
- [kCVImageBufferFieldDetailSpatialFirstLineLate](corevideo/kcvimagebufferfielddetailspatialfirstlinelate.md)