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Anyone please help me to get the processed video URL from GPUImage2 Library after applying video filter?

do 
 let bundleURL = Bundle.main.resourceURL!
 let movieURL = URL(string:"sample_iPod.m4v", relativeTo:bundleURL)!
 movie = try MovieInput(url:movieURL, playAtActualSpeed:true)
 filter = SaturationAdjustment()
 movie --> filter --> renderView
 movie.start()
 catch 
 fatalError("Could not initialize rendering pipeline: (error)")

Thanks in Advance,
James

 func applyfilters()
 do 
 // movie input
 movieInput = try MovieInput(url: inputVideoUrl, playAtActualSpeed: true, loop: false)

 // movie output
 movieOutput = try MovieOutput(URL: outputVideoUrl, size: videoSize, liveVideo: false) 

 // pipeline
 movieInput.addTarget(currentFilter)
 currentFilter.addTarget(renderView)
 currentFilter.addTarget(movieOutput!)

 movieOutput!.startRecording()
 movieInput.start()

 catch 
 print(error.localizedDescription)
 
 

 //Below function should be called after the filter is applied on full video. If you call this function before video ends it will not generate the rest part of the video.

 func stopVideoRecording(completion: (() -> Void)?) 
 movieOutput?.finishRecording 
 completion?()
 
 

 //To save video
 func saveVideo()
 PHPhotoLibrary.shared().performChanges(
 PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: outputVideoUrl)
 ) saved, error in
 if saved 
 let alertController = UIAlertController(title: "Your video was successfully saved", message: nil, preferredStyle: .alert)
 let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
 alertController.addAction(defaultAction)
 self.present(alertController, animated: true, completion: nil)
 
 
 

Usage Example

 applyFilters()

 DispatchQueue.main.asyncAfter(deadline:.now()+AVAsset(url:inputVideoUrl).duration.seconds, execute: 
 stopVideoRecording
 self.saveVideo()
 
 )