diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index e8be60c..3610847 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -49,24 +49,6 @@ namespace N_m3u8DL_RE.DownloadManager
             }
         }
 
-        //若该文件夹为空，删除，同时判断其父文件夹，直到遇到根目录或不为空的目录
-        private void SafeDeleteDir(string dirPath)
-        {
-            if (string.IsNullOrEmpty(dirPath) || !Directory.Exists(dirPath))
-                return;
-
-            var parent = Path.GetDirectoryName(dirPath)!;
-            if (!Directory.EnumerateFileSystemEntries(dirPath).Any())
-            {
-                Directory.Delete(dirPath);
-            }
-            else
-            {
-                return;
-            }
-            SafeDeleteDir(parent);
-        }
-
         //从文件读取KEY
         private async Task SearchKeyAsync(string? currentKID)
         {
@@ -532,7 +514,7 @@ namespace N_m3u8DL_RE.DownloadManager
                 {
                     File.Delete(file);
                 }
-                SafeDeleteDir(tmpDir);
+                OtherUtil.SafeDeleteDir(tmpDir);
             }
 
             //重新读取init信息
@@ -650,7 +632,7 @@ namespace N_m3u8DL_RE.DownloadManager
                     Logger.WarnMarkUp("[grey]Cleaning files...[/]");
                     OutputFiles.ForEach(f => File.Delete(f.FilePath));
                     var tmpDir = DownloaderConfig.MyOptions.TmpDir ?? Environment.CurrentDirectory;
-                    SafeDeleteDir(tmpDir);  
+                    OtherUtil.SafeDeleteDir(tmpDir);  
                 }
                 else Logger.ErrorMarkUp($"Mux failed");
                 //判断是否要改名
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
index f26fd32..24af798 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
@@ -24,6 +24,7 @@ namespace N_m3u8DL_RE.DownloadManager
         DownloaderConfig DownloaderConfig;
         StreamExtractor StreamExtractor;
         List<StreamSpec> SelectedSteams;
+        List<OutputFile> OutputFiles = new();
         DateTime NowDateTime;
         DateTime? PublishDateTime;
         bool STOP_FLAG = false;
@@ -533,6 +534,15 @@ namespace N_m3u8DL_RE.DownloadManager
 
             if (fileOutputStream != null)
             {
+                //记录所有文件信息
+                OutputFiles.Add(new OutputFile()
+                {
+                    Index = task.Id,
+                    FilePath = fileOutputStream.Name,
+                    LangCode = streamSpec.Language,
+                    Description = streamSpec.Name,
+                    Mediainfos = mediaInfos
+                });
                 fileOutputStream.Close();
                 fileOutputStream.Dispose();
             }
@@ -685,9 +695,38 @@ namespace N_m3u8DL_RE.DownloadManager
             var success = Results.Values.All(v => v == true);
 
             //混流
-            if (success && DownloaderConfig.MyOptions.MuxAfterDone)
+            if (success && DownloaderConfig.MyOptions.MuxAfterDone && OutputFiles.Count > 0)
             {
-                Logger.Error("Not supported yet!");
+                OutputFiles = OutputFiles.OrderBy(o => o.Index).ToList();
+                if (DownloaderConfig.MyOptions.MuxImports != null)
+                {
+                    OutputFiles.AddRange(DownloaderConfig.MyOptions.MuxImports);
+                }
+                OutputFiles.ForEach(f => Logger.WarnMarkUp($"[grey]{Path.GetFileName(f.FilePath).EscapeMarkup()}[/]"));
+                var saveDir = DownloaderConfig.MyOptions.SaveDir ?? Environment.CurrentDirectory;
+                var ext = DownloaderConfig.MyOptions.MuxToMp4 ? ".mp4" : ".mkv";
+                var outName = $"{DownloaderConfig.MyOptions.SaveName ?? NowDateTime.ToString("yyyy-MM-dd_HH-mm-ss")}.MUX";
+                var outPath = Path.Combine(saveDir, outName);
+                Logger.WarnMarkUp($"Muxing to [grey]{outName.EscapeMarkup()}{ext}[/]");
+                var result = false;
+                if (DownloaderConfig.MyOptions.UseMkvmerge) result = MergeUtil.MuxInputsByMkvmerge(DownloaderConfig.MyOptions.MkvmergeBinaryPath!, OutputFiles.ToArray(), outPath);
+                else result = MergeUtil.MuxInputsByFFmpeg(DownloaderConfig.MyOptions.FFmpegBinaryPath!, OutputFiles.ToArray(), outPath, DownloaderConfig.MyOptions.MuxToMp4);
+                //完成后删除各轨道文件
+                if (result && !DownloaderConfig.MyOptions.MuxKeepFiles)
+                {
+                    Logger.WarnMarkUp("[grey]Cleaning files...[/]");
+                    OutputFiles.ForEach(f => File.Delete(f.FilePath));
+                    var tmpDir = DownloaderConfig.MyOptions.TmpDir ?? Environment.CurrentDirectory;
+                    OtherUtil.SafeDeleteDir(tmpDir);
+                }
+                else Logger.ErrorMarkUp($"Mux failed");
+                //判断是否要改名
+                var newPath = Path.ChangeExtension(outPath, ext);
+                if (result && !File.Exists(newPath))
+                {
+                    Logger.WarnMarkUp($"Rename to [grey]{Path.GetFileName(newPath).EscapeMarkup()}[/]");
+                    File.Move(outPath + ext, newPath);
+                }
             }
 
             return success;
diff --git a/src/N_m3u8DL-RE/Util/OtherUtil.cs b/src/N_m3u8DL-RE/Util/OtherUtil.cs
index 0a22190..1c55278 100644
--- a/src/N_m3u8DL-RE/Util/OtherUtil.cs
+++ b/src/N_m3u8DL-RE/Util/OtherUtil.cs
@@ -118,5 +118,23 @@ namespace N_m3u8DL_RE.Util
 
             return new TimeSpan(days, hours, mins, secs);
         }
+
+        //若该文件夹为空，删除，同时判断其父文件夹，直到遇到根目录或不为空的目录
+        public static void SafeDeleteDir(string dirPath)
+        {
+            if (string.IsNullOrEmpty(dirPath) || !Directory.Exists(dirPath))
+                return;
+
+            var parent = Path.GetDirectoryName(dirPath)!;
+            if (!Directory.EnumerateFileSystemEntries(dirPath).Any())
+            {
+                Directory.Delete(dirPath);
+            }
+            else
+            {
+                return;
+            }
+            SafeDeleteDir(parent);
+        }
     }
 }