diff --git a/util/ffmpeg.go b/util/ffmpeg.go
index 6971c54..fd0d560 100644
--- a/util/ffmpeg.go
+++ b/util/ffmpeg.go
@@ -147,7 +147,7 @@ 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, task.Offset, task.Offset, task.OutputFile)
+	result, err := SlowVideoCut(subCtx, task.Files, task.Offset, task.Length, task.OutputFile)
 	if err != nil {
 		return false
 	}
@@ -317,8 +317,10 @@ func QuickVideoCut(ctx context.Context, inputFile string, offset, length float64
 		"-hide_banner",
 		"-y",
 		"-i", inputFile,
+		"-f", "lavfi", "-i", "anullsrc=channel_layout=mono:sample_rate=44100",
 		"-c:v", "copy",
-		"-an",
+		"-c:a", "aac",
+		"-shortest",
 		"-reset_timestamps", "1",
 		"-ss", strconv.FormatFloat(offset, 'f', 2, 64),
 		"-t", strconv.FormatFloat(length, 'f', 2, 64),
@@ -360,8 +362,10 @@ func QuickConcatVideoCut(ctx context.Context, inputFiles []dto.File, offset, len
 		"-f", "concat",
 		"-safe", "0",
 		"-i", tmpFile,
+		"-f", "lavfi", "-i", "anullsrc=channel_layout=mono:sample_rate=44100",
 		"-c:v", "copy",
-		"-an",
+		"-c:a", "aac",
+		"-shortest",
 		"-ss", strconv.FormatFloat(offset, 'f', 2, 64),
 		"-t", strconv.FormatFloat(length, 'f', 2, 64),
 		"-f", "mp4",
@@ -383,6 +387,9 @@ func SlowVideoCut(ctx context.Context, inputFiles []dto.File, offset, length flo
 		ffmpegCmd = append(ffmpegCmd, "-i", file.Url)
 	}
 
+	// 添加静音音频源作为额外输入
+	ffmpegCmd = append(ffmpegCmd, "-f", "lavfi", "-i", "anullsrc=channel_layout=mono:sample_rate=44100")
+
 	inputCount := len(inputFiles)
 	filterComplex := strings.Builder{}
 	for i := 0; i < inputCount; i++ {
@@ -393,8 +400,10 @@ func SlowVideoCut(ctx context.Context, inputFiles []dto.File, offset, length flo
 	ffmpegCmd = append(ffmpegCmd,
 		"-filter_complex", filterComplex.String(),
 		"-map", "[v]",
+		"-map", fmt.Sprintf("%d:a", inputCount),
+		"-c:a", "aac",
+		"-shortest",
 		"-preset:v", "fast",
-		"-an",
 		"-ss", strconv.FormatFloat(offset, 'f', 2, 64),
 		"-t", strconv.FormatFloat(length, 'f', 2, 64),
 		"-f", "mp4",