<!--
{
  "availability" : [
    "iOS: 17.0.0 -",
    "iPadOS: 17.0.0 -",
    "macCatalyst: 17.0.0 -",
    "macOS: 14.0.0 -",
    "tvOS: 17.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "VideoToolbox",
  "identifier" : "/documentation/VideoToolbox/VTDecompressionSessionCreate(allocator:formatDescription:decoderSpecification:imageBufferAttributes:decompressionSessionOut:)",
  "metadataVersion" : "0.1.0",
  "role" : "Function",
  "symbol" : {
    "kind" : "Function",
    "modules" : [
      "Video Toolbox"
    ],
    "preciseIdentifier" : "s:12VideoToolbox28VTDecompressionSessionCreate9allocator17formatDescription20decoderSpecification21imageBufferAttributes013decompressionD3Outs5Int32VSo14CFAllocatorRefaSg_So08CMFormathR0aSo012CFDictionaryR0aSgAQSpySo0cdR0aSgGtF"
  },
  "title" : "VTDecompressionSessionCreate(allocator:formatDescription:decoderSpecification:imageBufferAttributes:decompressionSessionOut:)"
}
-->

# VTDecompressionSessionCreate(allocator:formatDescription:decoderSpecification:imageBufferAttributes:decompressionSessionOut:)

```
func VTDecompressionSessionCreate(allocator: CFAllocator?, formatDescription videoFormatDescription: CMVideoFormatDescription, decoderSpecification videoDecoderSpecification: CFDictionary?, imageBufferAttributes destinationImageBufferAttributes: CFDictionary?, decompressionSessionOut: UnsafeMutablePointer<VTDecompressionSession?>) -> OSStatus
```

---

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)