<!--
{
  "availability" : [
    "iOS: 17.4.0 -",
    "iPadOS: 17.4.0 -",
    "macCatalyst: 17.4.0 -",
    "macOS: 10.9.0 -",
    "tvOS: 17.4.0 -",
    "visionOS: 1.1.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "VideoToolbox",
  "identifier" : "/documentation/VideoToolbox/kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "Video Toolbox"
    ],
    "preciseIdentifier" : "c:@kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder"
  },
  "title" : "kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder"
}
-->

# kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder

A Boolean value indicating whether a hardware-accelerated video encoder is used.

```
let kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder: CFString
```

## Discussion

You can query this property using [`VTSessionCopyProperty(_:key:allocator:valueOut:)`](/documentation/VideoToolbox/VTSessionCopyProperty(_:key:allocator:valueOut:)) after you have enabled hardware accelerated encode using [`kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder`](/documentation/VideoToolbox/kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder) to see if a hardware-accelerated encoder was selected (<doc://com.apple.documentation/documentation/CoreFoundation/kCFBooleanTrue>).

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)