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Overlay alpha channel video animation player view using Metal.

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Overlay alpha channel video animation player view using Metal.


To run the example project, clone the repo, and run pod install from the Example directory first.


At the top of your file, make sure to

import Kitsunebi
import Kitsunebi

Then, instantiate PlayerView in your view controller:

private lazy var playerView: PlayerView = PlayerView(frame: view.bounds)!

override func viewDidLoad() { super.viewDidLoad() view.addSubview(playerView) }

You can play transparency video any framerate. baseVideo is colornize video, alphaVideo is alpha channel monotone video. please see example video files.:

let baseVideoURL = Bundle.main.url(forResource: "base", withExtension: "mp4")!
let alphaVideoURL = Bundle.main.url(forResource: "alpha", withExtension: "mp4")! baseVideoURL, alpha: alphaVideoURL, fps: 30)


Kitsunebi is available SwiftPM and Carthage. To install it, simply add the following line to your SwiftPM:

dependencies: [
    .package(url: "", .upToNextMajor(from: "v1.0.0"))
github "noppefoxwolf/Kitsunebi" "v1.0.0"


Tomoya Hirano, [email protected]


Kitsunebi is available under the MIT license. See the LICENSE file for more info.

Sample video file


Split video using ffmpeg

ffmpeg -i base.mp4  -i alpha.mp4 -filter_complex "nullsrc=size=1500x1334 [base];[0:v] setpts=PTS-STARTPTS, scale=750x1334 [left];[1:v] setpts=PTS-STARTPTS, scale=750x1334 [right];[base][left] overlay=shortest=1 [tmp1];[tmp1][right] overlay=shortest=1:x=750" output.mp4

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