diff --git a/src/N_m3u8DL-RE.Common/Util/HTTPUtil.cs b/src/N_m3u8DL-RE.Common/Util/HTTPUtil.cs
index e5cdbe1..027f2d7 100644
--- a/src/N_m3u8DL-RE.Common/Util/HTTPUtil.cs
+++ b/src/N_m3u8DL-RE.Common/Util/HTTPUtil.cs
@@ -52,7 +52,7 @@ namespace N_m3u8DL_RE.Common.Util
             Logger.Debug(webRequest.Headers.ToString());
             //手动处理跳转，以免自定义Headers丢失
             var webResponse = await AppHttpClient.SendAsync(webRequest, HttpCompletionOption.ResponseHeadersRead);
-            if (webResponse.StatusCode == HttpStatusCode.Found || webResponse.StatusCode == HttpStatusCode.Moved)
+            if (webResponse.StatusCode == HttpStatusCode.Found || webResponse.StatusCode == HttpStatusCode.Moved || webResponse.StatusCode == HttpStatusCode.SeeOther)
             {
                 HttpResponseHeaders respHeaders = webResponse.Headers;
                 Logger.Debug(respHeaders.ToString());
diff --git a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
index da93eb8..f91df89 100644
--- a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
+++ b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
@@ -433,7 +433,7 @@ namespace N_m3u8DL_RE.CommandLine
                 Environment.Exit(0);
             }
 
-            var rootCommand = new RootCommand("N_m3u8DL-RE (Beta version) 20221011")
+            var rootCommand = new RootCommand("N_m3u8DL-RE (Beta version) 20221014")
             {
                 Input, TmpDir, SaveDir, SaveName, BaseUrl, ThreadCount, DownloadRetryCount, AutoSelect, SkipMerge, SkipDownload, CheckSegmentsCount,
                 BinaryMerge, DelAfterDone, WriteMetaJson, AppendUrlParams, ConcurrentDownload, Headers, /**SavePattern,**/ SubOnly, SubtitleFormat, AutoSubtitleFix,
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index 29f18e8..f496f3f 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -291,6 +291,10 @@ namespace N_m3u8DL_RE.DownloadManager
             else if (streamSpec.MediaType == MediaType.AUDIO && streamSpec.Extension == "m4s") outputExt = ".m4a";
             else if (streamSpec.MediaType != MediaType.SUBTITLES && streamSpec.Extension == "m4s") outputExt = ".mp4";
 
+            if (DownloaderConfig.MyOptions.SubtitleFormat == Enum.SubtitleFormat.SRT && outputExt == ".vtt")
+            {
+                outputExt = ".srt";
+            }
             var output = Path.Combine(saveDir, saveName + outputExt);
 
             //检测目标文件是否存在
@@ -369,7 +373,6 @@ namespace N_m3u8DL_RE.DownloadManager
                 {
                     path = Path.ChangeExtension(path, ".srt");
                     subContentFixed = OtherUtil.WebVtt2Other(finalVtt, DownloaderConfig.MyOptions.SubtitleFormat);
-                    output = Path.ChangeExtension(output, ".srt");
                 }
                 await File.WriteAllTextAsync(path, subContentFixed, Encoding.UTF8);
                 FileDic[keys.First()] = new DownloadResult()
@@ -404,7 +407,6 @@ namespace N_m3u8DL_RE.DownloadManager
                     {
                         path = Path.ChangeExtension(path, ".srt");
                         subContentFixed = OtherUtil.WebVtt2Other(finalVtt, DownloaderConfig.MyOptions.SubtitleFormat);
-                        output = Path.ChangeExtension(output, ".srt");
                     }
                     await File.WriteAllTextAsync(path, subContentFixed, Encoding.UTF8);
                     FileDic[firstKey] = new DownloadResult()
@@ -412,8 +414,6 @@ namespace N_m3u8DL_RE.DownloadManager
                         ActualContentLength = subContentFixed.Length,
                         ActualFilePath = path
                     };
-                    //修改输出后缀
-                    output = Path.ChangeExtension(output, Path.GetExtension(path));
                 }
             }
 
@@ -437,7 +437,6 @@ namespace N_m3u8DL_RE.DownloadManager
                 {
                     path = Path.ChangeExtension(path, ".srt");
                     subContentFixed = OtherUtil.WebVtt2Other(finalVtt, DownloaderConfig.MyOptions.SubtitleFormat);
-                    output = Path.ChangeExtension(output, ".srt");
                 }
                 await File.WriteAllTextAsync(path, subContentFixed, Encoding.UTF8);
                 FileDic[firstKey] = new DownloadResult()
@@ -445,8 +444,6 @@ namespace N_m3u8DL_RE.DownloadManager
                     ActualContentLength = subContentFixed.Length,
                     ActualFilePath = path
                 };
-                //修改输出后缀
-                output = Path.ChangeExtension(output, Path.GetExtension(path));
             }
 
             //自动修复TTML mp4字幕
@@ -474,7 +471,6 @@ namespace N_m3u8DL_RE.DownloadManager
                 {
                     path = Path.ChangeExtension(path, ".srt");
                     subContentFixed = OtherUtil.WebVtt2Other(finalVtt, DownloaderConfig.MyOptions.SubtitleFormat);
-                    output = Path.ChangeExtension(output, ".srt");
                 }
                 await File.WriteAllTextAsync(path, subContentFixed, Encoding.UTF8);
                 FileDic[firstKey] = new DownloadResult()
@@ -482,8 +478,6 @@ namespace N_m3u8DL_RE.DownloadManager
                     ActualContentLength = subContentFixed.Length,
                     ActualFilePath = path
                 };
-                //修改输出后缀
-                output = Path.ChangeExtension(output, Path.GetExtension(path));
             }
 
             bool mergeSuccess = false;