diff --git a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
index 1925972..079525c 100644
--- a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
+++ b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
@@ -92,6 +92,7 @@ namespace N_m3u8DL_RE.CommandLine
                 }
                 imports.Add(new OutputFile()
                 {
+                    Index = 999,
                     FilePath = path,
                     LangCode = lang,
                     Description = name
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index 957e22c..00e2175 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -543,7 +543,7 @@ namespace N_m3u8DL_RE.DownloadManager
 
             //记录所有文件信息
             if (File.Exists(output))
-                OutputFiles.Add(new OutputFile() { FilePath = output, LangCode = streamSpec.Language, Description = streamSpec.Name });
+                OutputFiles.Add(new OutputFile() { Index = task.Id, FilePath = output, LangCode = streamSpec.Language, Description = streamSpec.Name });
 
             return true;
         }
@@ -603,6 +603,7 @@ namespace N_m3u8DL_RE.DownloadManager
             //混流
             if (success && DownloaderConfig.MyOptions.MuxAfterDone && OutputFiles.Count > 0) 
             {
+                OutputFiles = OutputFiles.OrderBy(o => o.Index).ToList();
                 if (DownloaderConfig.MyOptions.MuxImports != null)
                 {
                     OutputFiles.AddRange(DownloaderConfig.MyOptions.MuxImports);
diff --git a/src/N_m3u8DL-RE/Entity/OutputFile.cs b/src/N_m3u8DL-RE/Entity/OutputFile.cs
index 10569c3..cbf8b1e 100644
--- a/src/N_m3u8DL-RE/Entity/OutputFile.cs
+++ b/src/N_m3u8DL-RE/Entity/OutputFile.cs
@@ -8,6 +8,7 @@ namespace N_m3u8DL_RE.Entity
 {
     internal class OutputFile
     {
+        public required int Index { get; set; }
         public required string FilePath { get; set; }
         public string? LangCode { get; set; }
         public string? Description { get; set; }
diff --git a/src/N_m3u8DL-RE/Program.cs b/src/N_m3u8DL-RE/Program.cs
index 8b054fe..75ce3d7 100644
--- a/src/N_m3u8DL-RE/Program.cs
+++ b/src/N_m3u8DL-RE/Program.cs
@@ -119,6 +119,7 @@ namespace N_m3u8DL_RE
                 parserConfig.UrlProcessors.Insert(0, new NowehoryzontyUrlProcessor());
 
                 var url = string.Empty;
+                //url = "https://play.itunes.apple.com/WebObjects/MZPlay.woa/hls/subscription/playlist.m3u8?cc=US&svcId=tvs.vds.4105&a=1580273278&isExternal=true&brandId=tvs.sbd.4000&id=337246031&l=en-US&aec=UHD&xtrick=true&webbrowser=true"; //啥都有
                 //url = "https://media.axprod.net/TestVectors/v7-Clear/Manifest_1080p.mpd"; //多音轨多字幕
                 //url = "https://cmafref.akamaized.net/cmaf/live-ull/2006350/akambr/out.mpd"; //直播
                 //url = "http://playertest.longtailvideo.com/adaptive/oceans_aes/oceans_aes.m3u8";
@@ -127,7 +128,6 @@ namespace N_m3u8DL_RE
                 //url = "http://tv-live.ynkmit.com/tv/anning.m3u8?txSecret=7528f35fb4b62bd24d55b891899db68f&txTime=632C8680"; //直播
                 //url = "https://rest-as.ott.kaltura.com/api_v3/service/assetFile/action/playManifest/partnerId/147/assetId/1304099/assetType/media/assetFileId/16136929/contextType/PLAYBACK/isAltUrl/False/ks/djJ8MTQ3fMusTFH6PCZpcrfKLQwI-pPm9ex6b6r49wioe32WH2udXeM4reyWIkSDpi7HhvhxBHAHAKiHrcnkmIJQpyAt4MuDBG0ywGQ-jOeqQFcTRQ8BGJGw6g-smSBLwSbo4CCx9M9vWNJX3GkOfhoMAY4yRU-ur3okHiVq1mUJ82XBd_iVqLuzodnc9sJEtcHH0zc5CoPiTq2xor-dq3yDURnZm3isfSN3t9uLIJEW09oE-SJ84DM5GUuFUdbnIV8bdcWUsPicUg-Top1G2D3WcWXq4EvPnwvD8jrC_vsiOpLHf5akAwtdGsJ6__cXUmT7a-QlfjdvaZ5T8UhDLnttHmsxYs2E5c0lh4uOvvJou8dD8iYxUexlPI2j4QUkBRxqOEVLSNV3Y82-5TTRqgnK_uGYXHwk7EAmDws7hbLj2-DJ1heXDcye3OJYdunJgAS-9ma5zmQQNiY_HYh6wj2N1HpCTNAtWWga6R9fC0VgBTZbidW-YwMSGzIvMQfIfWKe15X7Oc_hCs-zGfW9XeRJZrutcWKK_D_HlzpQVBF2vIF3XgaI/a.mpd";
                 //url = "https://dash.akamaized.net/dash264/TestCases/2c/qualcomm/1/MultiResMPEG2.mpd";
-                //url = "http://playertest.longtailvideo.com/adaptive/oceans_aes/oceans_aes.m3u8";
                 url = "https://cmaf.lln.latam.hbomaxcdn.com/videos/GYPGKMQjoDkVLBQEAAAAo/1/1b5ad5/1_single_J8sExA_1080hi.mpd";
                 //url = "https://livesim.dashif.org/dash/vod/testpic_2s/multi_subs.mpd"; //ttml + mp4
                 //url = "http://media.axprod.net/TestVectors/v6-Clear/Manifest_1080p.mpd"; //vtt + mp4
diff --git a/src/N_m3u8DL-RE/Util/MergeUtil.cs b/src/N_m3u8DL-RE/Util/MergeUtil.cs
index 53ff963..deb8ece 100644
--- a/src/N_m3u8DL-RE/Util/MergeUtil.cs
+++ b/src/N_m3u8DL-RE/Util/MergeUtil.cs
@@ -158,7 +158,7 @@ namespace N_m3u8DL_RE.Util
             //MAP
             for (int i = 0; i < files.Length; i++)
             {
-                command.Append($" -map {i} ");
+                command.Append($" -map {i}:0 ");
             }
 
             if (mp4)
@@ -225,10 +225,11 @@ namespace N_m3u8DL_RE.Util
         private static void ConvertLangCodeAndDisplayName(OutputFile outputFile)
         {
             if (string.IsNullOrEmpty(outputFile.LangCode)) return;
+            outputFile.LangCode = outputFile.LangCode.Split('-')[0];
             CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.AllCultures);
             foreach (var c in cultures)
             {
-                if (outputFile.LangCode.Split('-')[0] == c.TwoLetterISOLanguageName)
+                if (outputFile.LangCode == c.TwoLetterISOLanguageName)
                 {
                     outputFile.LangCode = c.ThreeLetterISOLanguageName;
                     if (string.IsNullOrEmpty(outputFile.Description))
@@ -240,8 +241,8 @@ namespace N_m3u8DL_RE.Util
             }
             //有的播放器不识别zho，统一转为chi
             if (outputFile.LangCode == "zho") outputFile.LangCode = "chi";
-            if (outputFile.LangCode == "cmn") outputFile.LangCode = "chi";
-            if (outputFile.LangCode == "yue") outputFile.LangCode = "chi";
+            else if (outputFile.LangCode == "cmn") outputFile.LangCode = "chi";
+            else if (outputFile.LangCode == "yue") outputFile.LangCode = "chi";
         }
     }
 }