diff --git a/src/N_m3u8DL-RE.Parser/Extractor/DASHExtractor2.cs b/src/N_m3u8DL-RE.Parser/Extractor/DASHExtractor2.cs
index 38cde3e..81a52ad 100644
--- a/src/N_m3u8DL-RE.Parser/Extractor/DASHExtractor2.cs
+++ b/src/N_m3u8DL-RE.Parser/Extractor/DASHExtractor2.cs
@@ -230,6 +230,7 @@ namespace N_m3u8DL_RE.Parser.Extractor
                                     var initUrl = ParserUtil.CombineURL(segBaseUrl, initialization.Attribute("sourceURL")?.Value!);
                                     var initRange = initialization.Attribute("range")?.Value;
                                     streamSpec.Playlist.MediaInit = new MediaSegment();
+                                    streamSpec.Playlist.MediaInit.Index = -1; //便于排序
                                     streamSpec.Playlist.MediaInit.Url = initUrl;
                                     if (initRange != null)
                                     {
@@ -253,6 +254,7 @@ namespace N_m3u8DL_RE.Parser.Extractor
                                 var initUrl = ParserUtil.CombineURL(segBaseUrl, initialization.Attribute("sourceURL")?.Value!);
                                 var initRange = initialization.Attribute("range")?.Value;
                                 streamSpec.Playlist.MediaInit = new MediaSegment();
+                                streamSpec.Playlist.MediaInit.Index = -1; //便于排序
                                 streamSpec.Playlist.MediaInit.Url = initUrl;
                                 if (initRange != null)
                                 {
@@ -312,6 +314,7 @@ namespace N_m3u8DL_RE.Parser.Extractor
                             {
                                 var initUrl = ParserUtil.ReplaceVars(ParserUtil.CombineURL(segBaseUrl, initialization), varDic);
                                 streamSpec.Playlist.MediaInit = new MediaSegment();
+                                streamSpec.Playlist.MediaInit.Index = -1; //便于排序
                                 streamSpec.Playlist.MediaInit.Url = initUrl;
                             }
                             //处理分片
diff --git a/src/N_m3u8DL-RE.Parser/Extractor/HLSExtractor.cs b/src/N_m3u8DL-RE.Parser/Extractor/HLSExtractor.cs
index b33e1d0..46429e8 100644
--- a/src/N_m3u8DL-RE.Parser/Extractor/HLSExtractor.cs
+++ b/src/N_m3u8DL-RE.Parser/Extractor/HLSExtractor.cs
@@ -372,6 +372,7 @@ namespace N_m3u8DL_RE.Parser.Extractor
                         playlist.MediaInit = new MediaSegment()
                         {
                             Url = PreProcessUrl(ParserUtil.CombineURL(BaseUrl, ParserUtil.GetAttribute(line, "URI"))),
+                            Index = -1, //便于排序
                         };
                         if (line.Contains("BYTERANGE"))
                         {
diff --git a/src/N_m3u8DL-RE.Parser/Extractor/MSSExtractor.cs b/src/N_m3u8DL-RE.Parser/Extractor/MSSExtractor.cs
index 692dfa5..e6639a8 100644
--- a/src/N_m3u8DL-RE.Parser/Extractor/MSSExtractor.cs
+++ b/src/N_m3u8DL-RE.Parser/Extractor/MSSExtractor.cs
@@ -148,6 +148,7 @@ namespace N_m3u8DL_RE.Parser.Extractor
                     streamSpec.Playlist.MediaInit = new MediaSegment();
                     if (!string.IsNullOrEmpty(codecPrivateData))
                     {
+                        streamSpec.Playlist.MediaInit.Index = -1; //便于排序
                         streamSpec.Playlist.MediaInit.Url = $"hex://{codecPrivateData}";
                     }