---
title: trackID
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avassetsegmenttrackreport/trackid
---

# trackID

A persistent unique identifier for a track.

## Declaration

```swift
var trackID: CMPersistentTrackID { get }
```

## See Also

### Inspecting a report

- [mediaType](avfoundation/avassetsegmenttrackreport/mediatype.md)
- [duration](avfoundation/avassetsegmenttrackreport/duration.md)
- [earliestPresentationTimeStamp](avfoundation/avassetsegmenttrackreport/earliestpresentationtimestamp.md)
- [firstVideoSampleInformation](avfoundation/avassetsegmenttrackreport/firstvideosampleinformation.md)
- [AVAssetSegmentReportSampleInformation](avfoundation/avassetsegmentreportsampleinformation.md)