---
title: generate
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avvideocomposition/perframehdrdisplaymetadatapolicy-swift.struct/generate
---

# generate

A video composition may generate HDR metadata and attach it to the rendered frame.

## Declaration

```swift
static let generate: AVVideoComposition.PerFrameHDRDisplayMetadataPolicy
```

## Discussion

Discussion HDR metadata generation is influenced by the color space of the rendered frame, device, and HDR metadata format platform support. Any previously attached HDR metadata of the same metadata format is overwritten.

## See Also

### Policies

- [propagate](avfoundation/avvideocomposition/perframehdrdisplaymetadatapolicy-swift.struct/propagate.md)