diff --git a/util/ffmpeg.go b/util/ffmpeg.go
index 53a2536..f0876ce 100644
--- a/util/ffmpeg.go
+++ b/util/ffmpeg.go
@@ -66,8 +66,14 @@ func runFfmpegForMultipleFile1(ctx context.Context, task *dto.FfmpegTask) bool {
 	var wg sync.WaitGroup
 	var mu sync.Mutex
 	var notOk bool
+	var taskClone = dto.FfmpegTask{
+		Files:      task.Files,
+		OutputFile: task.OutputFile,
+		Offset:     task.Offset,
+		Length:     task.Length,
+	}
 
-	for i := range task.Files {
+	for i := range taskClone.Files {
 		wg.Add(1)
 		go func(file *dto.File) {
 			defer wg.Done()
@@ -88,7 +94,7 @@ func runFfmpegForMultipleFile1(ctx context.Context, task *dto.FfmpegTask) bool {
 				// 失败了，务必删除临时文件
 				os.Remove(tmpFile)
 			}
-		}(&task.Files[i])
+		}(&taskClone.Files[i])
 	}
 
 	wg.Wait()
@@ -99,7 +105,7 @@ func runFfmpegForMultipleFile1(ctx context.Context, task *dto.FfmpegTask) bool {
 	}
 
 	// 步骤二：使用concat协议拼接裁切
-	result, err := QuickConcatVideoCut(subCtx, task.Files, int64(task.Offset), int64(task.Length), task.OutputFile)
+	result, err := QuickConcatVideoCut(subCtx, taskClone.Files, int64(taskClone.Offset), int64(taskClone.Length), taskClone.OutputFile)
 	if err != nil {
 		span.SetAttributes(attribute.String("error", err.Error()))
 		span.SetStatus(codes.Error, "FFMPEG多文件concat协议转码失败")
@@ -107,13 +113,13 @@ func runFfmpegForMultipleFile1(ctx context.Context, task *dto.FfmpegTask) bool {
 	}
 
 	// 步骤三：删除临时文件
-	for _, file := range task.Files {
+	for _, file := range taskClone.Files {
 		if err := os.Remove(file.Url); err != nil {
 			log.Printf("删除临时文件失败: %v", err)
 		}
 	}
 	if result {
-		outfile, err := os.Stat(task.OutputFile)
+		outfile, err := os.Stat(taskClone.OutputFile)
 		if err != nil {
 			span.SetAttributes(attribute.String("error", err.Error()))
 			span.SetStatus(codes.Error, "文件不存在")