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Annotations

While there is no dedicated tool for annotations, VideoEditor SDK can easily be configured to include the features necessary for a powerful yet simple-to-use video annotation tool. To this end we only enable features that are useful to annotate objects in a video:

  • brush tool for flexible marking and colored highlights
  • sticker tool for including shapes such as arrows, tags or badges
  • text tool to provide information around annotation markers

Configuring menu items#

Since we only want to include the three above mention tools, we create their respective menu items using the ToolMenuItem API.

Stickers#

We want to omit stickers that are not annotation specific, but rather add shapes such as arrows, tags or badges. To that end, we load the sticker assets from the app bundle and wrap them in a Sticker object. Those stickers are then added to a category so we can meaningful name and group them in the editor UI. Consult the sticker configuration section for more details.

Configuration#

Finally, we configure the asset catalog to include the previously defined stickers and the top-level VideoEditViewController to only display the menu items of the annotation tools. For a detailed explanation of how to configure different editor views, refer to this guide.

File:
import UIKit
import VideoEditorSDK


class VideoAnnotationSolutionSwift: Example, VideoEditViewControllerDelegate {
  override func invokeExample() {
    // Create a `Video` from a URL to a video in the app bundle.
    let video = Video(url: Bundle.main.url(forResource: "Skater", withExtension: "mp4")!)


    // For this example only the sticker, text, and brush tool are enabled.
    let toolItems = [ToolMenuItem.createStickerToolItem(), ToolMenuItem.createTextToolItem(), ToolMenuItem.createBrushToolItem()]
    let menuItems: [PhotoEditMenuItem] = toolItems.compactMap { menuItem in
      if let menuItem = menuItem {
        return .tool(menuItem)
      }
      return nil
    }


    // For this example only stickers suitable for annotations are enabled.
    let stickerIdentifiers = ["imgly_sticker_shapes_arrow_02", "imgly_sticker_shapes_arrow_03", "imgly_sticker_shapes_badge_11", "imgly_sticker_shapes_badge_12", "imgly_sticker_shapes_badge_36"]
    let stickers = stickerIdentifiers.map { Sticker(imageURL: Bundle.imgly.resourceBundle.url(forResource: $0, withExtension: "png")!, thumbnailURL: nil, identifier: $0) }


    // Create a custom sticker category for the annotation stickers.
    let stickerCategory = StickerCategory(identifier: "annotation_stickers", title: "Annotation", imageURL: Bundle.imgly.resourceBundle.url(forResource: "imgly_sticker_shapes_arrow_02", withExtension: "png")!, stickers: stickers)


    // Create a `Configuration` object.
    let configuration = Configuration { builder in
      // Add the annotation sticker category to the asset catalog.
      builder.assetCatalog.stickers = [stickerCategory]


      // Configure the `VideoEditViewController`.
      builder.configureVideoEditViewController { options in
        // Assign the custom selection of tools.
        options.menuItems = menuItems
      }
    }


    // Create and present the video editor. Make this class the delegate of it to handle export and cancelation.
    let videoEditViewController = VideoEditViewController(videoAsset: video, configuration: configuration)
    videoEditViewController.delegate = self
    videoEditViewController.modalPresentationStyle = .fullScreen
    presentingViewController?.present(videoEditViewController, animated: true, completion: nil)
  }


  // MARK: - VideoEditViewControllerDelegate


  func videoEditViewControllerShouldStart(_ videoEditViewController: VideoEditViewController, task: VideoEditorTask) -> Bool {
    // Implementing this method is optional. You can perform additional validation and interrupt the process by returning `false`.
    true
  }


  func videoEditViewControllerDidFinish(_ videoEditViewController: VideoEditViewController, result: VideoEditorResult) {
    // The user exported a new video successfully and the newly generated video is located at `result.output.url`. Dismissing the editor.
    presentingViewController?.dismiss(animated: true, completion: nil)
  }


  func videoEditViewControllerDidFail(_ videoEditViewController: VideoEditViewController, error: VideoEditorError) {
    // There was an error generating the video.
    print(error.localizedDescription)
    // Dismissing the editor.
    presentingViewController?.dismiss(animated: true, completion: nil)
  }


  func videoEditViewControllerDidCancel(_ videoEditViewController: VideoEditViewController) {
    // The user tapped on the cancel button within the editor. Dismissing the editor.
    presentingViewController?.dismiss(animated: true, completion: nil)
  }
}