How to create loop video in SceneKit on iOS in Swift 3?

Question

How to create material in SceneKit that plays loop video?

Answer 1

This can be done in SceneKit using the SpriteKit scene as the material geometry .

In the following example, you create a SpriteKit scene, add a video node to it using a video player, loop the video player, create a SceneKit scene, add a SceneKit plane and finally add a SpriteKit scene as a diffuse material plane.

import UIKit
import SceneKit
import SpriteKit
import AVFoundation

class ViewController: UIViewController, SCNSceneRendererDelegate {

    @IBOutlet weak var sceneView: SCNView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // A SpriteKit scene to contain the SpriteKit video node
        let spriteKitScene = SKScene(size: CGSize(width: sceneView.frame.width, height: sceneView.frame.height))
        spriteKitScene.scaleMode = .aspectFit

        // Create a video player, which will be responsible for the playback of the video material
        let videoUrl = Bundle.main.url(forResource: "videos/video", withExtension: "mp4")!
        let videoPlayer = AVPlayer(url: videoUrl)

        // To make the video loop
        videoPlayer.actionAtItemEnd = .none
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(ViewController.playerItemDidReachEnd),
            name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
            object: videoPlayer.currentItem)

        // Create the SpriteKit video node, containing the video player
        let videoSpriteKitNode = SKVideoNode(avPlayer: videoPlayer)
        videoSpriteKitNode.position = CGPoint(x: spriteKitScene.size.width / 2.0, y: spriteKitScene.size.height / 2.0)
        videoSpriteKitNode.size = spriteKitScene.size
        videoSpriteKitNode.yScale = -1.0
        videoSpriteKitNode.play()
        spriteKitScene.addChild(videoSpriteKitNode)

        // Create the SceneKit scene
        let scene = SCNScene()
        sceneView.scene = scene
        sceneView.delegate = self
        sceneView.isPlaying = true

        // Create a SceneKit plane and add the SpriteKit scene as its material
        let background = SCNPlane(width: CGFloat(100), height: CGFloat(100))
        background.firstMaterial?.diffuse.contents = spriteKitScene
        let backgroundNode = SCNNode(geometry: background)
        scene.rootNode.addChildNode(backgroundNode)

        ...
    }

    // This callback will restart the video when it has reach its end
    func playerItemDidReachEnd(notification: NSNotification) {
        if let playerItem: AVPlayerItem = notification.object as? AVPlayerItem {
            playerItem.seek(to: kCMTimeZero)
        }
    }

    ...
}

Answer 2

AVPlayer. , , .play(nil) sceneView.

override func viewDidLoad() {
    super.viewDidLoad()

    // Set the view delegate
    sceneView.delegate = self

    // Show statistics such as fps and timing information
    sceneView.showsStatistics = true

    // Create a new scene
    let scene = SCNScene(named: "art.scnassets/ship.scn")!

    // create and add a camera to the scene
    let cameraNode = SCNNode()
    cameraNode.camera = SCNCamera()
    scene.rootNode.addChildNode(cameraNode)

    // Set the scene to the view
    sceneView.scene = scene

    let movieFileURL = Bundle.main.url(forResource: "example", withExtension: "mov")!
    let player = AVPlayer(url:movieFileURL)
    scene.background.contents = player
    sceneView.play(nil) //without this line the movie was not playing

    player.play()
}