相关疑难解决方法(0)

我是swift的新手,并尝试构建一个可以应用实时过滤器的相机应用程序,并使用应用的过滤器进行保存.

到目前为止,我可以使用应用的滤镜实时预览,但是当我将视频保存为全黑时.

import UIKit
import AVFoundation
import AssetsLibrary
import CoreMedia
import Photos

class ViewController: UIViewController , AVCaptureVideoDataOutputSampleBufferDelegate {

    var captureSession: AVCaptureSession!

    @IBOutlet weak var previewView: UIView!
    @IBOutlet weak var recordButtton: UIButton!
    @IBOutlet weak var imageView: UIImageView!

    var assetWriter: AVAssetWriter?
    var assetWriterPixelBufferInput: AVAssetWriterInputPixelBufferAdaptor?
    var isWriting = false
    var currentSampleTime: CMTime?
    var currentVideoDimensions: CMVideoDimensions?

    override func viewDidLoad() {
        super.viewDidLoad()
        FilterVendor.register()
        setupCaptureSession()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    func setupCaptureSession() {
        let captureSession = AVCaptureSession()
        captureSession.sessionPreset = AVCaptureSessionPresetPhoto

        guard let captureDevice = …