---
title: AVMetricPlayerItemVariantSwitchStartEvent
framework: avfoundation
role: symbol
role_heading: Class
path: avfoundation/avmetricplayeritemvariantswitchstartevent
---

# AVMetricPlayerItemVariantSwitchStartEvent

An event that represents when the player attempts a variant switch.

## Declaration

```swift
class AVMetricPlayerItemVariantSwitchStartEvent
```

## Topics

### Inspecting the event

- [fromVariant](avfoundation/avmetricplayeritemvariantswitchstartevent/fromvariant.md)
- [loadedTimeRanges](avfoundation/avmetricplayeritemvariantswitchstartevent/loadedtimeranges-2mbm7.md)
- [toVariant](avfoundation/avmetricplayeritemvariantswitchstartevent/tovariant.md)
- [audioRendition](avfoundation/avmetricplayeritemvariantswitchstartevent/audiorendition.md)
- [videoRendition](avfoundation/avmetricplayeritemvariantswitchstartevent/videorendition.md)
- [subtitleRendition](avfoundation/avmetricplayeritemvariantswitchstartevent/subtitlerendition.md)

## Relationships

### Inherits From

- [AVMetricEvent](avfoundation/avmetricevent.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### HTTP Live Streaming

- [AVMetricMediaResourceRequestEvent](avfoundation/avmetricmediaresourcerequestevent.md)
- [AVMetricContentKeyRequestEvent](avfoundation/avmetriccontentkeyrequestevent.md)
- [AVMetricHLSMediaSegmentRequestEvent](avfoundation/avmetrichlsmediasegmentrequestevent.md)
- [AVMetricHLSPlaylistRequestEvent](avfoundation/avmetrichlsplaylistrequestevent.md)
- [AVMetricPlayerItemVariantSwitchEvent](avfoundation/avmetricplayeritemvariantswitchevent.md)
- [AVMetricMediaRendition](avfoundation/avmetricmediarendition.md)