diff --git a/src/N_m3u8DL-RE.Common/Entity/MediaSegment.cs b/src/N_m3u8DL-RE.Common/Entity/MediaSegment.cs
index 4055ee1..1606d57 100644
--- a/src/N_m3u8DL-RE.Common/Entity/MediaSegment.cs
+++ b/src/N_m3u8DL-RE.Common/Entity/MediaSegment.cs
@@ -1,4 +1,6 @@
-namespace N_m3u8DL_RE.Common.Entity;
+using N_m3u8DL_RE.Common.Enum;
+
+namespace N_m3u8DL_RE.Common.Entity;
 
 public class MediaSegment
 {
@@ -11,7 +13,9 @@ public class MediaSegment
     public long? StopRange => (StartRange != null && ExpectLength != null) ? StartRange + ExpectLength - 1 : null;
     public long? ExpectLength { get; set; }
 
-    public EncryptInfo EncryptInfo { get; set; } = new EncryptInfo();
+    public EncryptInfo EncryptInfo { get; set; } = new();
+    
+    public bool IsEncrypted => EncryptInfo.Method != EncryptMethod.NONE;
 
     public string Url { get; set; }
 
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index b3dfe1e..7226679 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -177,7 +177,7 @@ internal class SimpleDownloadManager
                 // 从文件读取KEY
                 await SearchKeyAsync(currentKID);
                 // 实时解密
-                if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID) && StreamExtractor.ExtractorType != ExtractorType.MSS)
+                if (streamSpec.Playlist.MediaInit.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID) && StreamExtractor.ExtractorType != ExtractorType.MSS)
                 {
                     var enc = result.ActualFilePath;
                     var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
@@ -225,7 +225,7 @@ internal class SimpleDownloadManager
                     var processor = new MSSMoovProcessor(streamSpec);
                     var header = processor.GenHeader(File.ReadAllBytes(result.ActualFilePath));
                     await File.WriteAllBytesAsync(FileDic[streamSpec.Playlist!.MediaInit!]!.ActualFilePath, header);
-                    if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
+                    if (seg.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
                     {
                         // 需要重新解密init
                         var enc = FileDic[streamSpec.Playlist!.MediaInit!]!.ActualFilePath;
@@ -249,7 +249,7 @@ internal class SimpleDownloadManager
                 // 从文件读取KEY
                 await SearchKeyAsync(currentKID);
                 // 实时解密
-                if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
+                if (seg.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
                 {
                     var enc = result.ActualFilePath;
                     var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
@@ -287,7 +287,7 @@ internal class SimpleDownloadManager
             if (result != null && result.Success)
                 task.Increment(1);
             // 实时解密
-            if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && result != null && result.Success && !string.IsNullOrEmpty(currentKID)) 
+            if (seg.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && result != null && result.Success && !string.IsNullOrEmpty(currentKID)) 
             {
                 var enc = result.ActualFilePath;
                 var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
index 51eafd8..a31eff8 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
@@ -211,7 +211,7 @@ internal class SimpleLiveRecordManager2
                     // 从文件读取KEY
                     await SearchKeyAsync(currentKID);
                     // 实时解密
-                    if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID) && StreamExtractor.ExtractorType != ExtractorType.MSS)
+                    if (streamSpec.Playlist.MediaInit.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID) && StreamExtractor.ExtractorType != ExtractorType.MSS)
                     {
                         var enc = result.ActualFilePath;
                         var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
@@ -270,7 +270,7 @@ internal class SimpleLiveRecordManager2
                         var processor = new MSSMoovProcessor(streamSpec);
                         var header = processor.GenHeader(File.ReadAllBytes(result.ActualFilePath));
                         await File.WriteAllBytesAsync(FileDic[streamSpec.Playlist!.MediaInit!]!.ActualFilePath, header);
-                        if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
+                        if (seg.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
                         {
                             // 需要重新解密init
                             var enc = FileDic[streamSpec.Playlist!.MediaInit!]!.ActualFilePath;
@@ -290,7 +290,7 @@ internal class SimpleLiveRecordManager2
                     // 从文件读取KEY
                     await SearchKeyAsync(currentKID);
                     // 实时解密
-                    if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
+                    if (seg.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID))
                     {
                         var enc = result.ActualFilePath;
                         var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
@@ -333,7 +333,7 @@ internal class SimpleLiveRecordManager2
                 if (result != null && result.Success)
                     task.Increment(1);
                 // 实时解密
-                if (DownloaderConfig.MyOptions.MP4RealTimeDecryption && result != null && result.Success && !string.IsNullOrEmpty(currentKID))
+                if (seg.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && result != null && result.Success && !string.IsNullOrEmpty(currentKID))
                 {
                     var enc = result.ActualFilePath;
                     var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));