# projectAspectRatio(_:) Provides the aspect ratio of the host’s project. ``` func projectAspectRatio(_ aspectRatio: UnsafeMutablePointer!) throws ``` ## Parameters `aspectRatio` A float value representing the project aspect ratio. ## Discussion Use this method to get the aspect ratio of the current project. The clip that the user applies your plug-in to may not be the same aspect ratio as the project or sequence it’s a part of. > Note: > This method returns the document space aspect ratio, meaning the aspect ratio the project is displayed at after any non-square pixels or fields are accounted for. For example, a NTSC standard definition DV project that’s `720 x 480` with `10:11` pixel aspect ratio returns `(720 * 10/11) / 480 = ~1.36363636...` as the aspect ratio, not `1.5`. --- Copyright © 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)