extension MapViewController: DJIVideoFeedListener {

    func videoFeed(_ videoFeed: DJIVideoFeed, didUpdateVideoData videoData: Data) {
        let data = NSData(data: videoData)
        var video = videoData
        video.withUnsafeMutableBytes { (pointer: UnsafeMutablePointer<UInt8>) in
            VideoPreviewer.instance().push(pointer, length: Int32(data.length))
        }
    }
}