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# VTRegisterSupplementalVideoDecoderIfAvailable(_:)

Registers a video decoder for the specified codec type, if one exists on the current system.

```
func VTRegisterSupplementalVideoDecoderIfAvailable(_ codecType: CMVideoCodecType)
```

## Parameters

`codecType`

A codec type for which to register a decoder.

## Discussion

Call this function to find and register video decoders that aren’t registered by default.

---

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