How to get thumbnail image of video picked from UIPickerViewController in Swift?

Question

This is how I access the video:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {

    if let videoURL = info[UIImagePickerControllerMediaURL] as? NSURL {
        let video = NSData(contentsOfURL: videoURL)
    }
}

That video I would like to show the user in my controller (I do not mean UIDocumentInteractionController to preview this). I need a thumbnail of that video, and then assign this to UIImageView. Is it possible?

Answer 1

The simplest answer:

import AVFoundation

private func thumbnailForVideoAtURL(url: NSURL) -> UIImage? {

    let asset = AVAsset(URL: url)
    let assetImageGenerator = AVAssetImageGenerator(asset: asset)

    var time = asset.duration
    time.value = min(time.value, 2)

    do {
        let imageRef = try assetImageGenerator.copyCGImageAtTime(time, actualTime: nil)
        return UIImage(CGImage: imageRef)
    } catch {
        print("error")
        return nil
    }
}