diff --git a/src/N_m3u8DL-RE.Common/Resource/ResString.cs b/src/N_m3u8DL-RE.Common/Resource/ResString.cs
index a50ae5d..0c9437b 100644
--- a/src/N_m3u8DL-RE.Common/Resource/ResString.cs
+++ b/src/N_m3u8DL-RE.Common/Resource/ResString.cs
@@ -12,6 +12,7 @@ namespace N_m3u8DL_RE.Common.Resource
         public static string autoBinaryMerge { get => GetText("autoBinaryMerge"); }
         public static string autoBinaryMerge2 { get => GetText("autoBinaryMerge2"); }
         public static string autoBinaryMerge3 { get => GetText("autoBinaryMerge3"); }
+        public static string autoBinaryMerge4 { get => GetText("autoBinaryMerge4"); }
         public static string badM3u8 { get => GetText("badM3u8"); }
         public static string binaryMerge { get => GetText("binaryMerge"); }
         public static string checkingLast { get => GetText("checkingLast"); }
diff --git a/src/N_m3u8DL-RE.Common/Resource/StaticText.cs b/src/N_m3u8DL-RE.Common/Resource/StaticText.cs
index 0b195e4..c4676da 100644
--- a/src/N_m3u8DL-RE.Common/Resource/StaticText.cs
+++ b/src/N_m3u8DL-RE.Common/Resource/StaticText.cs
@@ -28,6 +28,12 @@ namespace N_m3u8DL_RE.Common.Resource
                 zhTW: "檢測到無法識別的加密方式，自動開啟二進位制合併",
                 enUS: "An unrecognized encryption method is detected, binary merging is automatically enabled"
             ),
+            ["autoBinaryMerge4"] = new TextContainer
+            (
+                zhCN: "检测到CENC加密方式，自动开启二进制合并",
+                zhTW: "檢測到CENC加密方式，自動開啟二進位制合併",
+                enUS: "When CENC encryption is detected, binary merging is automatically enabled"
+            ),
             ["badM3u8"] = new TextContainer
             (
                 zhCN: "错误的m3u8",
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index ab69db4..d731249 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -95,6 +95,13 @@ namespace N_m3u8DL_RE.DownloadManager
             //开始下载
             Logger.InfoMarkUp(ResString.startDownloading + streamSpec.ToShortString());
 
+            //对于CENC，全部自动开启二进制合并
+            if (!DownloaderConfig.BinaryMerge && totalCount >= 1 && streamSpec.Playlist!.MediaParts.First().MediaSegments.First().EncryptInfo.Method == Common.Enum.EncryptMethod.CENC)
+            {
+                DownloaderConfig.BinaryMerge = true;
+                Logger.WarnMarkUp($"[darkorange3_1]{ResString.autoBinaryMerge4}[/]");
+            }
+
             //下载init
             if (streamSpec.Playlist?.MediaInit != null)
             {
@@ -447,42 +454,41 @@ namespace N_m3u8DL_RE.DownloadManager
                 }
             }
 
-            //调用mp4decrypt解密
-            if (mergeSuccess && File.Exists(output) && !DownloaderConfig.MP4RealTimeDecryption && DownloaderConfig.Keys != null && DownloaderConfig.Keys.Length > 0) 
+            //重新读取init信息
+            if (mergeSuccess && totalCount >= 1 && string.IsNullOrEmpty(currentKID) && streamSpec.Playlist!.MediaParts.First().MediaSegments.First().EncryptInfo.Method == Common.Enum.EncryptMethod.CENC)
             {
-                if (totalCount >= 1 && streamSpec.Playlist!.MediaParts.First().MediaSegments.First().EncryptInfo.Method != Common.Enum.EncryptMethod.NONE) 
+                using (var fs = File.OpenRead(output))
                 {
-                    if (string.IsNullOrEmpty(currentKID))
+                    var header = new byte[4096]; //4KB
+                    fs.Read(header);
+                    currentKID = ReadInit(header);
+                    //从文件读取KEY
+                    var _key = await MP4DecryptUtil.SearchKeyFromFile(DownloaderConfig.KeyTextFile, currentKID);
+                    if (_key != null)
                     {
-                        using (var fs = File.OpenRead(output))
-                        {
-                            var header = new byte[4096]; //4KB
-                            fs.Read(header);
-                            currentKID = ReadInit(header);
-                            //从文件读取KEY
-                            var _key = await MP4DecryptUtil.SearchKeyFromFile(DownloaderConfig.KeyTextFile, currentKID);
-                            if (_key != null)
-                            {
-                                if (DownloaderConfig.Keys == null)
-                                    DownloaderConfig.Keys = new string[] { _key };
-                                else
-                                    DownloaderConfig.Keys = DownloaderConfig.Keys.Concat(new string[] { _key }).ToArray();
-                            }
-                        }
-                    }
-                    var enc = output;
-                    var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
-                    Logger.InfoMarkUp($"[grey]Decrypting...[/]");
-                    var result = await MP4DecryptUtil.DecryptAsync(DownloaderConfig.UseShakaPackager, mp4decrypt, DownloaderConfig.Keys, enc, dec, currentKID);
-                    if (result) 
-                    {
-                        File.Delete(enc);
-                        File.Move(dec, enc);
-                        output = dec;
+                        if (DownloaderConfig.Keys == null)
+                            DownloaderConfig.Keys = new string[] { _key };
+                        else
+                            DownloaderConfig.Keys = DownloaderConfig.Keys.Concat(new string[] { _key }).ToArray();
                     }
                 }
             }
 
+            //调用mp4decrypt解密
+            if (mergeSuccess && File.Exists(output) && !string.IsNullOrEmpty(currentKID) && !DownloaderConfig.MP4RealTimeDecryption && DownloaderConfig.Keys != null && DownloaderConfig.Keys.Length > 0)
+            {
+                var enc = output;
+                var dec = Path.Combine(Path.GetDirectoryName(enc)!, Path.GetFileNameWithoutExtension(enc) + "_dec" + Path.GetExtension(enc));
+                Logger.InfoMarkUp($"[grey]Decrypting...[/]");
+                var result = await MP4DecryptUtil.DecryptAsync(DownloaderConfig.UseShakaPackager, mp4decrypt, DownloaderConfig.Keys, enc, dec, currentKID);
+                if (result)
+                {
+                    File.Delete(enc);
+                    File.Move(dec, enc);
+                    output = dec;
+                }
+            }
+
             return true;
         }