diff --git a/dto/ffmpeg.go b/dto/ffmpeg.go
index 1d61f40..fd88c7a 100644
--- a/dto/ffmpeg.go
+++ b/dto/ffmpeg.go
@@ -2,7 +2,7 @@ package dto
 
 type FfmpegTask struct {
 	Files      []File
-	Length     int
-	Offset     int
+	Length     float64
+	Offset     float64
 	OutputFile string
 }
diff --git a/util/ffmpeg.go b/util/ffmpeg.go
index f0876ce..5dcff2e 100644
--- a/util/ffmpeg.go
+++ b/util/ffmpeg.go
@@ -105,7 +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, taskClone.Files, int64(taskClone.Offset), int64(taskClone.Length), taskClone.OutputFile)
+	result, err := QuickConcatVideoCut(subCtx, taskClone.Files, taskClone.Offset, 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")
@@ -146,7 +146,7 @@ func runFfmpegForMultipleFile2(ctx context.Context, task *dto.FfmpegTask) bool {
 	subCtx, span := tracer.Start(ctx, "runFfmpegForMultipleFile2")
 	defer span.End()
 	// 多文件，方法二：使用计算资源编码
-	result, err := SlowVideoCut(subCtx, task.Files, int64(task.Offset), int64(task.Length), task.OutputFile)
+	result, err := SlowVideoCut(subCtx, task.Files, task.Offset, task.Offset, task.OutputFile)
 	if err != nil {
 		return false
 	}
@@ -177,7 +177,7 @@ func runFfmpegForMultipleFile2(ctx context.Context, task *dto.FfmpegTask) bool {
 func runFfmpegForSingleFile(ctx context.Context, task *dto.FfmpegTask) bool {
 	subCtx, span := tracer.Start(ctx, "runFfmpegForSingleFile")
 	defer span.End()
-	result, err := QuickVideoCut(subCtx, task.Files[0].Url, int64(task.Offset), int64(task.Length), task.OutputFile)
+	result, err := QuickVideoCut(subCtx, task.Files[0].Url, task.Offset, task.Length, task.OutputFile)
 	if err != nil {
 		span.SetStatus(codes.Error, "FFMPEG单个文件裁切失败")
 		return false
@@ -235,7 +235,7 @@ func CheckFileCoverageAndConstructTask(ctx context.Context, fileList []dto.File,
 				lastFile = &file
 				continue
 			}
-			if file.StartTime.Sub(lastFile.EndTime).Milliseconds() > 2000 {
+			if file.StartTime.Sub(lastFile.EndTime).Seconds() > 2 {
 				// 片段断开
 				span.SetStatus(codes.Error, "FFMPEG片段断开")
 				log.Printf("分析FFMPEG任务失败：ID：【%s】，文件片段：【%s,%s】中间断开【%f】秒(超过2秒)", task.TaskID, lastFile.Name, file.Name, file.StartTime.Sub(lastFile.EndTime).Seconds())
@@ -255,13 +255,13 @@ func CheckFileCoverageAndConstructTask(ctx context.Context, fileList []dto.File,
 	// 构造FfmpegTaskPo
 	ffmpegTask := &dto.FfmpegTask{
 		Files:      fileList,
-		Length:     int(endDt.Sub(beginDt).Seconds()),
-		Offset:     int(beginDt.Sub(fileList[0].StartTime).Seconds()),
+		Length:     endDt.Sub(beginDt).Seconds(),
+		Offset:     beginDt.Sub(fileList[0].StartTime).Seconds(),
 		OutputFile: path.Join(os.TempDir(), task.TaskID+".mp4"),
 	}
 	span.SetAttributes(attribute.String("task.files", ToJson(ffmpegTask.Files)))
-	span.SetAttributes(attribute.Int("task.offset", ffmpegTask.Offset))
-	span.SetAttributes(attribute.Int("task.length", ffmpegTask.Length))
+	span.SetAttributes(attribute.Float64("task.offset", ffmpegTask.Offset))
+	span.SetAttributes(attribute.Float64("task.length", ffmpegTask.Length))
 	span.SetStatus(codes.Ok, "FFMPEG任务构造成功")
 	return ffmpegTask, nil
 }
@@ -298,7 +298,7 @@ func convertHevcToTs(ctx context.Context, file dto.File, outFileName string) (bo
 	return handleFfmpegProcess(subCtx, ffmpegCmd)
 }
 
-func QuickVideoCut(ctx context.Context, inputFile string, offset, length int64, outputFile string) (bool, error) {
+func QuickVideoCut(ctx context.Context, inputFile string, offset, length float64, outputFile string) (bool, error) {
 	subCtx, span := tracer.Start(ctx, "QuickVideoCut")
 	defer span.End()
 	ffmpegCmd := []string{
@@ -309,8 +309,8 @@ func QuickVideoCut(ctx context.Context, inputFile string, offset, length int64,
 		"-c:v", "copy",
 		"-an",
 		"-reset_timestamps", "1",
-		"-ss", strconv.FormatInt(offset, 10),
-		"-t", strconv.FormatInt(length, 10),
+		"-ss", strconv.FormatFloat(offset, 'f', 2, 64),
+		"-t", strconv.FormatFloat(length, 'f', 2, 64),
 		"-fflags", "+genpts",
 		"-f", "mp4",
 		outputFile,
@@ -318,7 +318,7 @@ func QuickVideoCut(ctx context.Context, inputFile string, offset, length int64,
 	return handleFfmpegProcess(subCtx, ffmpegCmd)
 }
 
-func QuickConcatVideoCut(ctx context.Context, inputFiles []dto.File, offset, length int64, outputFile string) (bool, error) {
+func QuickConcatVideoCut(ctx context.Context, inputFiles []dto.File, offset, length float64, outputFile string) (bool, error) {
 	subCtx, span := tracer.Start(ctx, "QuickConcatVideoCut")
 	defer span.End()
 	tmpFile := fmt.Sprintf("tmp%.10f.txt", rand.Float64())
@@ -351,15 +351,15 @@ func QuickConcatVideoCut(ctx context.Context, inputFiles []dto.File, offset, len
 		"-i", tmpFile,
 		"-c:v", "copy",
 		"-an",
-		"-ss", strconv.FormatInt(offset, 10),
-		"-t", strconv.FormatInt(length, 10),
+		"-ss", strconv.FormatFloat(offset, 'f', 2, 64),
+		"-t", strconv.FormatFloat(length, 'f', 2, 64),
 		"-f", "mp4",
 		outputFile,
 	}
 	return handleFfmpegProcess(subCtx, ffmpegCmd)
 }
 
-func SlowVideoCut(ctx context.Context, inputFiles []dto.File, offset, length int64, outputFile string) (bool, error) {
+func SlowVideoCut(ctx context.Context, inputFiles []dto.File, offset, length float64, outputFile string) (bool, error) {
 	subCtx, span := tracer.Start(ctx, "SlowVideoCut")
 	defer span.End()
 	ffmpegCmd := []string{
@@ -384,8 +384,8 @@ func SlowVideoCut(ctx context.Context, inputFiles []dto.File, offset, length int
 		"-map", "[v]",
 		"-preset:v", "fast",
 		"-an",
-		"-ss", strconv.FormatInt(offset, 10),
-		"-t", strconv.FormatInt(length, 10),
+		"-ss", strconv.FormatFloat(offset, 'f', 2, 64),
+		"-t", strconv.FormatFloat(length, 'f', 2, 64),
 		"-f", "mp4",
 		outputFile,
 	)