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# timeRange

The time range of the track within the overall timeline of the asset.

```
static var timeRange: AVAsyncProperty<Root, CMTimeRange> { get }
```

## Discussion

Use the [`load(_:isolation:)`](/documentation/AVFoundation/AVAsynchronousKeyValueLoading/load(_:isolation:)) method to retrieve the property value.

If the start of the time range is greater than <doc://com.apple.documentation/documentation/CoreMedia/CMTime/zero>, the track doesn’t initially have media data to present. This condition may occur when the media delays an audio track to align the start of audio with a specific video frame. You can test for this as the example below shows:

```swift
if track.timeRange.start > .zero {
    // Delayed start.
}
```

---

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