var selectedPhotosArray = [UIImage]()
       
		var imageArrayToVideoURL = URL()
        
        imageArrayToVideoURL = NSURL(fileURLWithPath: NSHomeDirectory() + "/Documents/outputVideo.mp4")
       
        guard let videoWriter = try? AVAssetWriter(outputURL: imageArrayToVideoURL as URL, fileType: AVFileTypeMPEG4) else {
            fatalError("AVAssetWriter error")
        }
        let outputSettings = [AVVideoCodecKey : AVVideoCodecH264, AVVideoWidthKey : NSNumber(value: Float(outputSize.width)), AVVideoHeightKey : NSNumber(value: Float(outputSize.height))] as [String : Any]
        guard videoWriter.canApply(outputSettings: outputSettings, forMediaType: AVMediaTypeVideo) else {
            fatalError("Negative : Can't apply the Output settings...")
        }
        let videoWriterInput = AVAssetWriterInput(mediaType: AVMediaTypeVideo, outputSettings: outputSettings)
        let sourcePixelBufferAttributesDictionary = [kCVPixelBufferPixelFormatTypeKey as String : NSNumber(value: kCVPixelFormatType_32ARGB), kCVPixelBufferWidthKey as String: NSNumber(value: Float(outputSize.width)), kCVPixelBufferHeightKey as String: NSNumber(value: Float(outputSize.height))]
        let pixelBufferAdaptor = AVAssetWriterInputPixelBufferAdaptor(assetWriterInput: videoWriterInput, sourcePixelBufferAttributes: sourcePixelBufferAttributesDictionary)
        if videoWriter.canAdd(videoWriterInput) {
            videoWriter.add(videoWriterInput)
        }
        if videoWriter.startWriting() {
            let zeroTime = CMTimeMake(Int64(1),Int32(1))
            videoWriter.startSession(atSourceTime: zeroTime)
            
            assert(pixelBufferAdaptor.pixelBufferPool != nil)
            let media_queue = DispatchQueue(label: "mediaInputQueue")
            videoWriterInput.requestMediaDataWhenReady(on: media_queue, using: { () -> Void in
                let fps: Int32 = 1
                let framePerSecond: Int64 = Int64(1)
                let frameDuration = CMTimeMake(framePerSecond, fps)
                var frameCount: Int64 = 0
                var appendSucceeded = true
                while (!selectedPhotosArray.isEmpty) {
                    if (videoWriterInput.isReadyForMoreMediaData) {
                        let nextPhoto = selectedPhotosArray.remove(at: 0)
                        let lastFrameTime = CMTimeMake(frameCount * framePerSecond, fps)
                        let presentationTime = frameCount == 0 ? lastFrameTime : CMTimeAdd(lastFrameTime, frameDuration)
                        var pixelBuffer: CVPixelBuffer? = nil
                        let status: CVReturn = CVPixelBufferPoolCreatePixelBuffer(kCFAllocatorDefault, pixelBufferAdaptor.pixelBufferPool!, &pixelBuffer)
                        if let pixelBuffer = pixelBuffer, status == 0 {
                            let managedPixelBuffer = pixelBuffer
                            CVPixelBufferLockBaseAddress(managedPixelBuffer, CVPixelBufferLockFlags(rawValue: CVOptionFlags(0)))
                            let data = CVPixelBufferGetBaseAddress(managedPixelBuffer)
                            let rgbColorSpace = CGColorSpaceCreateDeviceRGB()
                            let context = CGContext(data: data, width: Int(outputSize.width), height: Int(outputSize.height), bitsPerComponent: 8, bytesPerRow: CVPixelBufferGetBytesPerRow(managedPixelBuffer), space: rgbColorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedFirst.rawValue)
                            context!.clear(CGRect(x: 0, y: 0, width: CGFloat(outputSize.width), height: CGFloat(outputSize.height)))
                            let horizontalRatio = CGFloat(outputSize.width) / nextPhoto.size.width
                            let verticalRatio = CGFloat(outputSize.height) / nextPhoto.size.height
                            //aspectRatio = max(horizontalRatio, verticalRatio) // ScaleAspectFill
                            let aspectRatio = min(horizontalRatio, verticalRatio) // ScaleAspectFit
                            let newSize: CGSize = CGSize(width: nextPhoto.size.width * aspectRatio, height: nextPhoto.size.height * aspectRatio)
                            let x = newSize.width < outputSize.width ? (outputSize.width - newSize.width) / 2 : 0
                            let y = newSize.height < outputSize.height ? (outputSize.height - newSize.height) / 2 : 0
                            context?.draw(nextPhoto.cgImage!, in: CGRect(x: x, y: y, width: newSize.width, height: newSize.height))
                            CVPixelBufferUnlockBaseAddress(managedPixelBuffer, CVPixelBufferLockFlags(rawValue: CVOptionFlags(0)))
                            appendSucceeded = pixelBufferAdaptor.append(pixelBuffer, withPresentationTime: presentationTime)
                        } else {
                            print("Failed to allocate pixel buffer")
                            appendSucceeded = false
                        }
                    }
                    if !appendSucceeded {
                        break
                    }
                    frameCount += 1
                }
                videoWriterInput.markAsFinished()
                videoWriter.finishWriting { () -> Void in
                    print(“complete”)
                }
            })
        }