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  "title" : "Image Buffer Field Detail Constants"
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# Image Buffer Field Detail Constants

Constants that indicate the field order of interlaced video in an image buffer.

## Discussion

Use the [`kCVImageBufferFieldDetailKey`](/documentation/CoreVideo/kCVImageBufferFieldDetailKey) key to attach one of these values to the image buffer.

## Topics

### Constants

[`let kCVImageBufferFieldDetailTemporalTopFirst: CFString`](/documentation/CoreVideo/kCVImageBufferFieldDetailTemporalTopFirst)

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

[`let kCVImageBufferFieldDetailTemporalBottomFirst: CFString`](/documentation/CoreVideo/kCVImageBufferFieldDetailTemporalBottomFirst)

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

[`let kCVImageBufferFieldDetailSpatialFirstLineEarly: CFString`](/documentation/CoreVideo/kCVImageBufferFieldDetailSpatialFirstLineEarly)

A key to the spatial first line early detail field of the image buffer.

[`let kCVImageBufferFieldDetailSpatialFirstLineLate: CFString`](/documentation/CoreVideo/kCVImageBufferFieldDetailSpatialFirstLineLate)

A key to the spatial first line late detail field of the image buffer.


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