无法使用SCAssetExportSession导出视频

Question

我已经使用screcorder来捕获视频，而我正在使用SCAssetExportSession来导出视频。出现以下错误后，我只能导出视频为第一次：

  

some：错误域= AVFoundationErrorDomain代码= -11800“操作无法完成” UserInfo = {NSLocalizedFailureReason =发生未知错误（-12138），NSLocalizedDescription =操作无法完成，NSUnderlyingError = 0x283903690 {Error Domain = NSOSStatusErrorDomain代码= -12138“（null）”}}

我已经检查了stackoverflow上的一些链接，但是这些链接都不适合我，我也尝试过关注

            self.session.deinitialize()
            self.exportSession = SCAssetExportSession()

我使用了以下代码：

func exportSessionVideo() {

    self.Loader_show()

    let videoName = randomString(length: 5) + ".mp4"

    let exportedVideoURL = (applicationDocumentsDirectory()?.appendingPathComponent(videoName))!

    exportSession = SCAssetExportSession()
    exportSession = SCAssetExportSession(asset: session.assetRepresentingSegments())
    exportSession.videoConfiguration.preset = SCPresetHighestQuality
    exportSession.audioConfiguration.preset = SCPresetHighestQuality
    exportSession.videoConfiguration.maxFrameRate = 35
    exportSession.outputUrl = session.outputUrl
    exportSession.outputFileType = AVFileType.mp4.rawValue
    exportSession.delegate = self
    exportSession.contextType = .auto
    //        let audioMix: AVMutableAudioMix = AVMutableAudioMix()
    //        var audioMixParam: [AVMutableAudioMixInputParameters] = []
    //
    //        let aAudioAssetTrack: AVAssetTrack = session.assetRepresentingSegments().tracks.first!
    //        let videoParam: AVMutableAudioMixInputParameters = AVMutableAudioMixInputParameters(track: aAudioAssetTrack)
    //        videoParam.trackID = aAudioAssetTrack.trackID
    //
    //        let videoVolume : Float = 1
    //
    //        videoParam.setVolume(videoVolume, at: kCMTimeZero)
    //
    //        videoParam.setVolumeRamp(fromStartVolume: videoVolume, toEndVolume: videoVolume, timeRange: aAudioAssetTrack.timeRange)
    //
    //        audioMixParam.append(videoParam)
    //        audioMix.inputParameters = audioMixParam
    //        exportSession.audioConfiguration.audioMix = audioMix

    exportSession.exportAsynchronously {
        self.Loader_Hide()
        let error = self.exportSession.error
        if (self.exportSession.cancelled) {
            showMessage("Export was cancelled")
        } else if error == nil {
            print("url: \(self.exportSession.outputUrl?.absoluteString ?? "nil url")")
            let assetURL = self.exportSession.outputUrl

            self.recorder.session = nil
            self.recorder.previewView = nil
            self.exportSession = SCAssetExportSession()
            self.session.deinitialize()
            self.recorder.session?.deinitialize()

            self.dismiss(animated: true, completion: {
                DispatchQueue.main.async(execute: {
                    let vc = loadVC(strStoryboardId: SB_CAMERA, strVCId: "CreatePostVC") as! CreatePostVC
                    vc.objEnum_PostType = .Video
                    vc.strPostURL = assetURL!.absoluteString

                    APP_DELEGATE.appNavigation?.present(vc, animated: true, completion: nil)
                })
            })

        } else {
            showMessage((error?.localizedDescription)!)
        }
    }
}