import SwiftUI
import AVFoundation
import AssetsLibrary
let urlStep = Bundle.main.url(forResource: "movie", withExtension: "mov")!

struct ContentView: View {

    var body: some View {
        VStack {
            Image(systemName: "globe")
                .imageScale(.large)
                .foregroundStyle(.tint)
            Text("Hello, world!")
     
            
        }
        .padding()
        .onAppear(perform: test)
    }
    
    func test() {
        let url = Bundle.main.url(forResource: "movie", withExtension: "mov")
        let videoAsset = AVURLAsset(url: url!)
        let t1 = CMTime(value: 1, timescale: 1)
        let t2 = CMTime(value: 4, timescale: 1)
        let t3 = CMTime(value: 8, timescale: 1)
        let timesArray = [
                    NSValue(time: t1),
                    NSValue(time: t2),
                    NSValue(time: t3)
                ]
        let generator = AVAssetImageGenerator(asset: videoAsset)
        generator.requestedTimeToleranceBefore = .zero
        generator.requestedTimeToleranceAfter = .zero     
        
        generator.generateCGImagesAsynchronously(forTimes: timesArray ) { @MainActor requestedTime, image, actualTime, result, error in
                    
             let img = UIImage(cgImage: image!)
        }
         
         
    }
}

#Preview {
    ContentView()
}