---
title: kCMSampleAttachmentKey_HEVCTemporalLevelInfo
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmsampleattachmentkey_hevctemporallevelinfo
---

# kCMSampleAttachmentKey_HEVCTemporalLevelInfo

An attachment that indicates a video frame’s level within a hierarchical frame dependency structure.

## Declaration

```swift
let kCMSampleAttachmentKey_HEVCTemporalLevelInfo: CFString
```

## See Also

### Constants

- [kCMAttachmentMode_ShouldNotPropagate](coremedia/kcmattachmentmode_shouldnotpropagate.md)
- [kCMAttachmentMode_ShouldPropagate](coremedia/kcmattachmentmode_shouldpropagate.md)
- [kCMSampleAttachmentKey_HEVCTemporalSubLayerAccess](coremedia/kcmsampleattachmentkey_hevctemporalsublayeraccess.md)
- [kCMSampleAttachmentKey_HEVCStepwiseTemporalSubLayerAccess](coremedia/kcmsampleattachmentkey_hevcstepwisetemporalsublayeraccess.md)
- [kCMSampleAttachmentKey_HEVCSyncSampleNALUnitType](coremedia/kcmsampleattachmentkey_hevcsyncsamplenalunittype.md)
- [kCMSampleAttachmentKey_CryptorSubsampleAuxiliaryData](coremedia/kcmsampleattachmentkey_cryptorsubsampleauxiliarydata.md)
- [kCMSampleAttachmentKey_AudioIndependentSampleDecoderRefreshCount](coremedia/kcmsampleattachmentkey_audioindependentsampledecoderrefreshcount.md)
- [kCMSampleBufferAttachmentKey_CameraIntrinsicMatrix](coremedia/kcmsamplebufferattachmentkey_cameraintrinsicmatrix.md)