How to convert video (in gallery) to NSData? in Swift

Question

I just haven't "info" in Swift imagePickerController so I don't know how get url and convert it to data to send to web-service.

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

  var videoDataURL = info[UIImagePickerControllerMediaURL] as! NSURL!
  var videoFileURL = videoDataURL.filePathURL
  var video = NSData.dataWithContentsOfMappedFile("\(videoDataURL)")
}

Answer 1

Xcode 10 • Swift 4.2 or later

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    if let url = info[.mediaURL] as? URL {
        do {
            try FileManager.default.moveItem(at: url, to: documentsDirectoryURL.appendingPathComponent("videoName.mov"))
            print("movie saved")
        } catch {
            print(error)
        }
    }
}

---

Xcode 8.3 • Swift 3.1

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: Any]) {
    let documentsDirectoryURL =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    if let fileURL =  info[UIImagePickerControllerMediaURL] as? URL {
        do {
            try  FileManager.default.moveItem(at: fileURL, to: documentsDirectoryURL.appendingPathComponent("videoName.mov")
            print("movie saved")
        } catch {
            print(error)
        }
    }
}

---

Swift 2

You should use if let to unwrap your optionals. Also NSData.dataWithContentsOfMappedFile was deprecated iOS8. Try using NSData method initializer contentsOfURL:

Note: You need also to change the didFinishPickingMediaWithInfo declaration from [NSObject : AnyObject] to [String : AnyObject]

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    if let fileURL = info[UIImagePickerControllerMediaURL] as? NSURL {
        if let videoData = NSData(contentsOfURL: fileURL) {
            print(videoData.length)
        }
    }
}

as mentioned by Rob the data can be really large but instead of copying the file you should move the file to the documents folder as follow:

let documentsDirectoryURL =  try! NSFileManager().URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
if let fileURL =  info[UIImagePickerControllerMediaURL] as? NSURL {
    do {
        try  NSFileManagerdefaultManager().moveItemAtURL(fileURL, toURL: documentsDirectoryURL.URLByAppendingPathComponent("videoName").URLByAppendingPathExtension("mov"))
        print("movie saved")
    } catch {
        print(error)
    }
}