---
title: kCMFormatDescriptionExtension_Version
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmformatdescriptionextension_version
---

# kCMFormatDescriptionExtension_Version

The value is a number.

## Declaration

```swift
let kCMFormatDescriptionExtension_Version: CFString
```

## See Also

### Constants

- [kCMFormatDescriptionConformsToMPEG2VideoProfile](coremedia/kcmformatdescriptionconformstompeg2videoprofile.md)
- [kCMFormatDescriptionExtension_TemporalQuality](coremedia/kcmformatdescriptionextension_temporalquality.md)
- [kCMFormatDescriptionExtension_SpatialQuality](coremedia/kcmformatdescriptionextension_spatialquality.md)
- [kCMFormatDescriptionExtension_RevisionLevel](coremedia/kcmformatdescriptionextension_revisionlevel.md)
- [kCMFormatDescriptionExtension_Vendor](coremedia/kcmformatdescriptionextension_vendor.md)
- [kCMFormatDescriptionVendor_Apple](coremedia/kcmformatdescriptionvendor_apple.md)