diff --git a/SwiftProject/SwiftProject/Project/Controller/RecordingVideo/VRVideoTransformController.swift b/SwiftProject/SwiftProject/Project/Controller/RecordingVideo/VRVideoTransformController.swift
index d1d292b..1e9cae7 100644
--- a/SwiftProject/SwiftProject/Project/Controller/RecordingVideo/VRVideoTransformController.swift
+++ b/SwiftProject/SwiftProject/Project/Controller/RecordingVideo/VRVideoTransformController.swift
@@ -683,21 +683,12 @@ extension VRVideoTransformController {
         
         writer.add(writerInput)
         
-        guard let assetExportSession = exportSession as? AVAssetExportSession else {
-            print("Failed to cast export session to AVAssetExportSession")
-            DispatchQueue.main.async {
-                SVProgressHUD.showInfo(withStatus: "视频转码失败")
-            }
-            completion(nil)
-            return
-        }
+        exportSession.videoComposition = AVMutableVideoComposition(propertiesOf: composition)
+        exportSession.outputFileType = AVFileType.mov
+        exportSession.outputURL = outputURL
         
-        assetExportSession.videoComposition = AVMutableVideoComposition(propertiesOf: composition)
-        assetExportSession.outputFileType = AVFileType.mov
-        assetExportSession.outputURL = outputURL
-        
-        assetExportSession.exportAsynchronously { [self] in
-            switch assetExportSession.status {
+        exportSession.exportAsynchronously { [self] in
+            switch exportSession.status {
             case .completed:
                 let exportedAsset = AVAsset(url: outputURL)
                 DispatchQueue.main.async {
@@ -705,7 +696,7 @@ extension VRVideoTransformController {
                     completion(exportedAsset)
                 }
             case .failed:
-                if let error = assetExportSession.error {
+                if let error = exportSession.error {
                     print("Export failed with error: \(error.localizedDescription)")
                     DispatchQueue.main.async {
                         SVProgressHUD.showInfo(withStatus: "视频导出失败：\(error.localizedDescription)")