Why is my video resource invalid for PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL:)

I am processing an H264 encoded video stream from a non-apple IoT device. I want to record bits of this video stream.

I'm getting an error when I try to save to the photo gallery:

The operation couldn’t be completed. (PHPhotosErrorDomain error 3302.)

My Code, let me know if I need to share more:

  private func beginRecording() {
    self.handlePhotoLibraryAuth()
    self.createFilePath()
    guard let videoOutputURL = self.outputURL,
       let vidWriter = try? AVAssetWriter(outputURL: videoOutputURL, fileType: AVFileType.mp4),
       self.formatDesc != nil else {
         print("Warning: No Format For Video")
         return
       }
    let vidInput = AVAssetWriterInput(mediaType: AVMediaType.video, outputSettings: nil, sourceFormatHint: self.formatDesc)
    guard vidWriter.canAdd(vidInput) else {
      print("Error: Cant add video writer input")
      return
    }
     
    let sourcePixelBufferAttributes = [
      kCVPixelBufferPixelFormatTypeKey as String: NSNumber(value: kCVPixelFormatType_32ARGB),
      kCVPixelBufferWidthKey as String: "1280",
      kCVPixelBufferHeightKey as String: "720"] as [String : Any]
     
    self.videoWriterInputPixelBufferAdaptor = AVAssetWriterInputPixelBufferAdaptor(
      assetWriterInput: vidInput,
      sourcePixelBufferAttributes: sourcePixelBufferAttributes)
    vidInput.expectsMediaDataInRealTime = true
    vidWriter.add(vidInput)
    guard vidWriter.startWriting() else {
      print("Error: Cant write with vid writer")
      return
    }
    vidWriter.startSession(atSourceTime: CMTimeMake(value: self.videoFrameCounter, timescale: self.videoFPS))
    self.videoWriter = vidWriter
    self.videoWriterInput = vidInput
    print("Recording Video Stream")
  }

Save the Video

  private func saveRecordingToPhotoLibrary() {
    let fileManager = FileManager.default
    guard fileManager.fileExists(atPath: self.path) else {
      print("Error: The file: \(self.path) not exists, so cannot move this file camera roll")
      return
    }
    print("The file: \(self.path) has been save into documents folder, and is ready to be moved to camera roll")

This is what Fails

    PHPhotoLibrary.shared().performChanges({
      PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: URL(fileURLWithPath: self.path))
    }) { completed, error in
      guard completed else {
        print ("Error: Cannot move the video \(self.path) to camera roll, error: \(String(describing: error?.localizedDescription))")
        return
      }
      print("Video \(self.path) has been moved to camera roll")
    }
  }

 When Recording ends we save the video

  private func endRecording() {
    guard let vidInput = videoWriterInput, let vidWriter = videoWriter else {
      print("Error, no video writer or video input")
      return
    }
    vidInput.markAsFinished()
    if !vidInput.isReadyForMoreMediaData {
      vidWriter.finishWriting {
        print("Finished Recording")
        guard vidWriter.status == .completed else {
          print("Warning: The Video Writer status is not completed, status: \(vidWriter.status.rawValue)")
          print(vidWriter.error.debugDescription)
          return
        }
        print("VideoWriter status is completed")
        self.saveRecordingToPhotoLibrary()
      }
    }
  }