ulaganathan-PalaniVelayutham

let videoSize: CGSize
if videoInfo.isPortrait {
    videoSize = CGSize(
        width: assetVideoTrack.naturalSize.height,
        height: assetVideoTrack.naturalSize.width)
}
else {
    videoSize = assetVideoTrack.naturalSize
}
//MARK:- Video Layer

ulaganathan-PalaniVelayutham

public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    guard let url = info[.mediaURL] as? URL else {
        return
    }

    self.dismiss(animated: true) {
        [weak self] in
        print(url)
        // you can pass on this url of the video to do other stuff
    }

ulaganathan-PalaniVelayutham

let alertController: UIAlertController = UIAlertController(title: "Pick an option", message: nil, preferredStyle: .actionSheet)
let cancelActionButton = UIAlertAction(title: "Cancel", style: .cancel) {
    _ in
}
alertController.addAction(cancelActionButton)
let imageGalleryAction = UIAlertAction(title: "Choose from Gallery", style: .default)
{
    [weak self] _ in
    self?.pickVideo(from: UIImagePickerController.SourceType.photoLibrary)
}

ulaganathan-PalaniVelayutham

func addWaterMark(toVideofrom url: URL, onComplete: @escaping (URL?, UIImage?) -> Void) {
        let queue = DispatchQueue.global(qos: .background)
        queue.async { [self] in
           1// let asset = AVURLAsset(url: url)
            2//let composition = AVMutableComposition()
            
           3// guard
             let compositionVideoTrack = composition.addMutableTrack(
                withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid),
             let assetVideoTrack = asset.tracks(withMediaType: .video).first