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# hevcTemporalInfo

Indicates a video frame’s level within a hierarchical frame dependency structure.

```
var hevcTemporalInfo: CMSampleBuffer.HEVCTemporalInfo? { get set }
```

## Discussion

When present, the temporal level attachments among a group of video frames provide information about where
inter-frame dependencies may and may not exist.

This attachment is read from and written to media files.

---

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