Overlays

VESDK/iOS/Guides/Overlays

VideoEditor SDK for iOS supports adding overlays vĩ đại videos for stunning effects.

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Overlays tool

Overlays are an easy, yet powerful way vĩ đại create stunning effects. To put it simply, overlays are images put on top of the input video clip. We provide several blend modes, that determine how exactly the overlay is applied. Each mode has its own characteristics and will add a unique flavor vĩ đại the final composition. Supported asset formats are jpeg and png.

Adding and removing overlays#

To work with overlays we created the Overlay class. It has a static array called all that holds all overlays, available within the editor. To add an overlay, just add it vĩ đại to the all array, before the editor is presented. The creation of an Overlay instance is pretty straightforward. The only thing vĩ đại consider is the identifier parameter. It must be unique since it will be used during the serialization vĩ đại identify the Overlay and store and restore its settings. All overlay assets provided in the SDK are prefixed with imgly_overlay vĩ đại avoid collisions. We highly recommend you vĩ đại prefix your identifiers as well. For more information, take a look at the Overlay API documentation.

Here is an example of how vĩ đại add an overlay.

let overlay = Overlay(identifier: "imgly_overlay_golden", displayName: "Golden", url: Bundle.imgly.resourceBundle.url(forResource: "imgly_overlay_golden", withExtension: "jpg"), thumbnailURL: Bundle.imgly.resourceBundle.url(forResource: "imgly_overlay_golden_thumb", withExtension: "jpg"), initialBlendMode: .lighten)
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let configuration = Configuration { builder in
  let assetCatalog = AssetCatalog.defaultItems
  assetCatalog.overlays.append(overlay)
  builder.assetCatalog = assetCatalog
}
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Please note that you have vĩ đại phối the initial blend mode. That must be one of normal, overlay, softLight, hardLight, multiply, darken, colorBurn, screen, and lighten. We could show you the math for each of these modes, but that won't help vĩ đại get a feel for the resulting visual effect. Therefore we encourage you vĩ đại add your overlay with any initial mode, and use the UI vĩ đại play with the blend mode and intensities.