---
title: kVTCompressionPropertyKey_MVHEVCLeftAndRightViewIDs
framework: videotoolbox
role: symbol
role_heading: Global Variable
path: videotoolbox/kvtcompressionpropertykey_mvhevcleftandrightviewids
---

# kVTCompressionPropertyKey_MVHEVCLeftAndRightViewIDs

Specifies which view identifier corresponds to the left eye and right eye.

## Declaration

```swift
let kVTCompressionPropertyKey_MVHEVCLeftAndRightViewIDs: CFString
```

## Discussion

Discussion This property is specific to MV-HEVC. The property value is an array containing two view identifiers as numbers. The first value corresponds to the left eye and the second value corresponds to the right. The system incorporates the view identifiers into the 3D Reference Displays Info SEI message. The property is NULL by default.

## See Also

### Multiview Compression

- [kVTCompressionPropertyKey_MVHEVCVideoLayerIDs](videotoolbox/kvtcompressionpropertykey_mvhevcvideolayerids.md)
- [kVTCompressionPropertyKey_MVHEVCViewIDs](videotoolbox/kvtcompressionpropertykey_mvhevcviewids.md)