<!--
{
  "availability" : [
    "iOS: 17.0.0 -",
    "iPadOS: 17.0.0 -",
    "macCatalyst: 17.0.0 -",
    "macOS: 10.9.0 -",
    "tvOS: 17.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "VideoToolbox",
  "identifier" : "/documentation/VideoToolbox/kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "Video Toolbox"
    ],
    "preciseIdentifier" : "c:@kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder"
  },
  "title" : "kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder"
}
-->

# kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder

Indicates if a hardware-accelerated video decoder is being used.

```
let kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder: CFString
```

## Discussion

You can query this property using [`VTSessionCopyProperty(_:key:allocator:valueOut:)`](/documentation/VideoToolbox/VTSessionCopyProperty(_:key:allocator:valueOut:)) after you have enabled hardware accelerated decode using [`kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder`](/documentation/VideoToolbox/kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder) to see if a hardware accelerated decoder was selected.

---

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)