---
title: AVVideoEncoderSpecificationKey
framework: avfoundation
role: symbol
role_heading: Global Variable
path: avfoundation/avvideoencoderspecificationkey
---

# AVVideoEncoderSpecificationKey

The video encoder specification includes options for choosing a specific video encoder.

## Declaration

```swift
let AVVideoEncoderSpecificationKey: String
```

## Discussion

Discussion The value for this key is a dictionary containing kVTVideoEncoderSpecification_* keys specified in the VideoToolbox framework. This key should be specified at the top level of an AVVideoSettings dictionary.