---
title: kVTDecompressionPropertyKey_FieldMode
framework: videotoolbox
role: symbol
role_heading: Global Variable
path: videotoolbox/kvtdecompressionpropertykey_fieldmode
---

# kVTDecompressionPropertyKey_FieldMode

Modes for special handling of interlaced content (optional).

## Declaration

```swift
let kVTDecompressionPropertyKey_FieldMode: CFString
```

## Discussion

Discussion This is an optional property for video decoders to implement. Decoders should only accept the modes that they will implement.

## Topics

### Field Modes

- [kVTDecompressionProperty_FieldMode_BothFields](videotoolbox/kvtdecompressionproperty_fieldmode_bothfields.md)
- [kVTDecompressionProperty_FieldMode_BottomFieldOnly](videotoolbox/kvtdecompressionproperty_fieldmode_bottomfieldonly.md)
- [kVTDecompressionProperty_FieldMode_DeinterlaceFields](videotoolbox/kvtdecompressionproperty_fieldmode_deinterlacefields.md)
- [kVTDecompressionProperty_FieldMode_SingleField](videotoolbox/kvtdecompressionproperty_fieldmode_singlefield.md)
- [kVTDecompressionProperty_FieldMode_TopFieldOnly](videotoolbox/kvtdecompressionproperty_fieldmode_topfieldonly.md)

## See Also

### Decoder Behavior

- [kVTDecompressionProperty_TemporalLevelLimit](videotoolbox/kvtdecompressionproperty_temporallevellimit.md)
- [kVTDecompressionPropertyKey_AllowBitstreamToChangeFrameDimensions](videotoolbox/kvtdecompressionpropertykey_allowbitstreamtochangeframedimensions.md)
- [kVTDecompressionPropertyKey_DeinterlaceMode](videotoolbox/kvtdecompressionpropertykey_deinterlacemode.md)
- [kVTDecompressionPropertyKey_MaximizePowerEfficiency](videotoolbox/kvtdecompressionpropertykey_maximizepowerefficiency.md)
- [kVTDecompressionPropertyKey_OnlyTheseFrames](videotoolbox/kvtdecompressionpropertykey_onlytheseframes.md)
- [kVTDecompressionPropertyKey_PixelFormatsWithReducedResolutionSupport](videotoolbox/kvtdecompressionpropertykey_pixelformatswithreducedresolutionsupport.md)
- [kVTDecompressionPropertyKey_RealTime](videotoolbox/kvtdecompressionpropertykey_realtime.md)
- [kVTDecompressionPropertyKey_ReducedCoefficientDecode](videotoolbox/kvtdecompressionpropertykey_reducedcoefficientdecode.md)
- [kVTDecompressionPropertyKey_ReducedFrameDelivery](videotoolbox/kvtdecompressionpropertykey_reducedframedelivery.md)
- [kVTDecompressionPropertyKey_ReducedResolutionDecode](videotoolbox/kvtdecompressionpropertykey_reducedresolutiondecode.md)
- [kVTDecompressionPropertyKey_SuggestedQualityOfServiceTiers](videotoolbox/kvtdecompressionpropertykey_suggestedqualityofservicetiers.md)
- [kVTDecompressionPropertyKey_SupportedPixelFormatsOrderedByPerformance](videotoolbox/kvtdecompressionpropertykey_supportedpixelformatsorderedbyperformance.md)
- [kVTDecompressionPropertyKey_SupportedPixelFormatsOrderedByQuality](videotoolbox/kvtdecompressionpropertykey_supportedpixelformatsorderedbyquality.md)
- [kVTDecompressionPropertyKey_ThreadCount](videotoolbox/kvtdecompressionpropertykey_threadcount.md)