diff --git a/src/N_m3u8DL-RE.Common/Resource/ResString.cs b/src/N_m3u8DL-RE.Common/Resource/ResString.cs
index e72fa71..4f4603e 100644
--- a/src/N_m3u8DL-RE.Common/Resource/ResString.cs
+++ b/src/N_m3u8DL-RE.Common/Resource/ResString.cs
@@ -77,7 +77,7 @@ public class ResString
     public static string cmd_uiLanguage => GetText("cmd_uiLanguage");
     public static string cmd_urlProcessorArgs => GetText("cmd_urlProcessorArgs");
     public static string cmd_useShakaPackager => GetText("cmd_useShakaPackager");
-    public static string cmd_useMp4decrypt => GetText("cmd_useMp4decrypt");
+    public static string cmd_decryptionEngine => GetText("cmd_decryptionEngine");
     public static string cmd_concurrentDownload => GetText("cmd_concurrentDownload");
     public static string cmd_useSystemProxy => GetText("cmd_useSystemProxy");
     public static string cmd_customProxy => GetText("cmd_customProxy");
diff --git a/src/N_m3u8DL-RE.Common/Resource/StaticText.cs b/src/N_m3u8DL-RE.Common/Resource/StaticText.cs
index bc7efcc..0922030 100644
--- a/src/N_m3u8DL-RE.Common/Resource/StaticText.cs
+++ b/src/N_m3u8DL-RE.Common/Resource/StaticText.cs
@@ -468,15 +468,15 @@ internal class StaticText
         ),
         ["cmd_useShakaPackager"] = new TextContainer
         (
-            zhCN: "解密时使用shaka-packager替代ffmpeg",
-            zhTW: "解密時使用shaka-packager替代ffmpeg",
-            enUS: "Use shaka-packager instead of ffmpeg to decrypt"
+            zhCN: "解密时使用shaka-packager替代mp4decrypt",
+            zhTW: "解密時使用shaka-packager替代mp4decrypt",
+            enUS: "Use shaka-packager instead of mp4decrypt to decrypt"
         ),
-        ["cmd_useMp4decrypt"] = new TextContainer
+        ["cmd_decryptionEngine"] = new TextContainer
         (
-            zhCN: "解密时使用mp4decrypt替代ffmpeg",
-            zhTW: "解密時使用mp4decrypt替代ffmpeg",
-            enUS: "Use mp4decrypt instead of ffmpeg to decrypt"
+            zhCN: "设置解密时使用的第三方程序",
+            zhTW: "設置解密時使用的第三方程序",
+            enUS: "Set the third-party program used for decryption"
         ),
         ["cmd_concurrentDownload"] = new TextContainer
         (
diff --git a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
index d1ceae5..5c6f182 100644
--- a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
+++ b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
@@ -53,8 +53,8 @@ internal partial class CommandInvoker
     private static readonly Option<bool> WriteMetaJson = new(["--write-meta-json"], description: ResString.cmd_writeMetaJson, getDefaultValue: () => true);
     private static readonly Option<bool> AppendUrlParams = new(["--append-url-params"], description: ResString.cmd_appendUrlParams, getDefaultValue: () => false);
     private static readonly Option<bool> MP4RealTimeDecryption = new (["--mp4-real-time-decryption"], description: ResString.cmd_MP4RealTimeDecryption, getDefaultValue: () => false);
-    private static readonly Option<bool> UseShakaPackager = new (["--use-shaka-packager"], description: ResString.cmd_useShakaPackager, getDefaultValue: () => false);
-    private static readonly Option<bool> UseMp4Decrypt = new (["--use-mp4decrypt"], description: ResString.cmd_useMp4decrypt, getDefaultValue: () => false);
+    private static readonly Option<bool> UseShakaPackager = new (["--use-shaka-packager"], description: ResString.cmd_useShakaPackager, getDefaultValue: () => false) { IsHidden = true };
+    private static readonly Option<DecryptEngine> DecryptionEngine = new (["--decryption-engine"], description: ResString.cmd_decryptionEngine, getDefaultValue: () => DecryptEngine.MP4DECRYPT);
     private static readonly Option<bool> ForceAnsiConsole = new(["--force-ansi-console"], description: ResString.cmd_forceAnsiConsole);
     private static readonly Option<bool> NoAnsiColor = new(["--no-ansi-color"], description: ResString.cmd_noAnsiColor);
     private static readonly Option<string?> DecryptionBinaryPath = new(["--decryption-binary-path"], description: ResString.cmd_decryptionBinaryPath) { ArgumentHelpName = "PATH" };
@@ -524,7 +524,7 @@ internal partial class CommandInvoker
                 UrlProcessorArgs = bindingContext.ParseResult.GetValueForOption(UrlProcessorArgs),
                 MP4RealTimeDecryption = bindingContext.ParseResult.GetValueForOption(MP4RealTimeDecryption),
                 UseShakaPackager = bindingContext.ParseResult.GetValueForOption(UseShakaPackager),
-                UseMp4Decrypt = bindingContext.ParseResult.GetValueForOption(UseMp4Decrypt),
+                DecryptionEngine = bindingContext.ParseResult.GetValueForOption(DecryptionEngine),
                 DecryptionBinaryPath = bindingContext.ParseResult.GetValueForOption(DecryptionBinaryPath),
                 FFmpegBinaryPath = bindingContext.ParseResult.GetValueForOption(FFmpegBinaryPath),
                 KeyTextFile = bindingContext.ParseResult.GetValueForOption(KeyTextFile),
@@ -617,7 +617,7 @@ internal partial class CommandInvoker
             Input, TmpDir, SaveDir, SaveName, BaseUrl, ThreadCount, DownloadRetryCount, HttpRequestTimeout, ForceAnsiConsole, NoAnsiColor,AutoSelect, SkipMerge, SkipDownload, CheckSegmentsCount,
             BinaryMerge, UseFFmpegConcatDemuxer, DelAfterDone, NoDateInfo, NoLog, WriteMetaJson, AppendUrlParams, ConcurrentDownload, Headers, /**SavePattern,**/ SubOnly, SubtitleFormat, AutoSubtitleFix,
             FFmpegBinaryPath,
-            LogLevel, UILanguage, UrlProcessorArgs, Keys, KeyTextFile, DecryptionBinaryPath, UseShakaPackager, UseMp4Decrypt, MP4RealTimeDecryption,
+            LogLevel, UILanguage, UrlProcessorArgs, Keys, KeyTextFile, DecryptionEngine, DecryptionBinaryPath, UseShakaPackager, MP4RealTimeDecryption,
             MaxSpeed,
             MuxAfterDone,
             CustomHLSMethod, CustomHLSKey, CustomHLSIv, UseSystemProxy, CustomProxy, CustomRange, TaskStartAt,
diff --git a/src/N_m3u8DL-RE/CommandLine/MyOption.cs b/src/N_m3u8DL-RE/CommandLine/MyOption.cs
index 67cad32..a3b78b8 100644
--- a/src/N_m3u8DL-RE/CommandLine/MyOption.cs
+++ b/src/N_m3u8DL-RE/CommandLine/MyOption.cs
@@ -139,11 +139,12 @@ internal class MyOption
     /// <summary>
     /// See: <see cref="CommandInvoker.UseShakaPackager"/>.
     /// </summary>
+    [Obsolete("Use DecryptionEngine instead")]
     public bool UseShakaPackager { get; set; }
     /// <summary>
-    /// See: <see cref="CommandInvoker.UseMp4Decrypt"/>.
+    /// See: <see cref="CommandInvoker.DecryptionEngine"/>.
     /// </summary>
-    public bool UseMp4Decrypt { get; set; }
+    public DecryptEngine DecryptionEngine { get; set; }
     /// <summary>
     /// See: <see cref="CommandInvoker.MuxAfterDone"/>.
     /// </summary>
@@ -270,13 +271,4 @@ internal class MyOption
     /// See: <see cref="CommandInvoker.LiveFixVttByAudio"/>.
     /// </summary>
     public bool LiveFixVttByAudio { get; set; }
-    
-    public DecryptEngine GetDecryptEngine()
-    {
-        if (UseShakaPackager)
-            return DecryptEngine.SHAKA_PACKAGER;
-        if (UseMp4Decrypt)
-            return DecryptEngine.MP4DECRYPT;
-        return DecryptEngine.FFMPEG;
-    }
 }
\ No newline at end of file
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index 7226679..ea39578 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -111,7 +111,7 @@ internal class SimpleDownloadManager
         var headers = DownloaderConfig.Headers;
 
         var decryptionBinaryPath = DownloaderConfig.MyOptions.DecryptionBinaryPath!;
-        var decryptEngine = DownloaderConfig.MyOptions.GetDecryptEngine();
+        var decryptEngine = DownloaderConfig.MyOptions.DecryptionEngine;
         var mp4InitFile = "";
         var currentKID = "";
         var readInfo = false; // 是否读取过
@@ -171,7 +171,7 @@ internal class SimpleDownloadManager
                 mp4Info = MP4DecryptUtil.GetMP4Info(result.ActualFilePath);
                 currentKID = mp4Info.KID;
                 // try shaka packager, which can handle WebM
-                if (string.IsNullOrEmpty(currentKID) &&  DownloaderConfig.MyOptions.UseShakaPackager) {
+                if (string.IsNullOrEmpty(currentKID) && DownloaderConfig.MyOptions.DecryptionEngine == DecryptEngine.SHAKA_PACKAGER) {
                     currentKID = MP4DecryptUtil.ReadInitShaka(result.ActualFilePath, decryptionBinaryPath);
                 }
                 // 从文件读取KEY
@@ -243,7 +243,7 @@ internal class SimpleDownloadManager
                     currentKID = MP4DecryptUtil.GetMP4Info(result.ActualFilePath).KID;
                 }
                 // try shaka packager, which can handle WebM
-                if (string.IsNullOrEmpty(currentKID) &&  DownloaderConfig.MyOptions.UseShakaPackager) {
+                if (string.IsNullOrEmpty(currentKID) &&  DownloaderConfig.MyOptions.DecryptionEngine == DecryptEngine.SHAKA_PACKAGER) {
                     currentKID = MP4DecryptUtil.ReadInitShaka(result.ActualFilePath, decryptionBinaryPath);
                 }
                 // 从文件读取KEY
@@ -590,7 +590,7 @@ internal class SimpleDownloadManager
         {
             currentKID = MP4DecryptUtil.GetMP4Info(output).KID;
             // try shaka packager, which can handle WebM
-            if (string.IsNullOrEmpty(currentKID) &&  DownloaderConfig.MyOptions.UseShakaPackager) {
+            if (string.IsNullOrEmpty(currentKID) &&  DownloaderConfig.MyOptions.DecryptionEngine == DecryptEngine.SHAKA_PACKAGER) {
                 currentKID = MP4DecryptUtil.ReadInitShaka(output, decryptionBinaryPath);
             }
             // 从文件读取KEY
@@ -654,7 +654,7 @@ internal class SimpleDownloadManager
         }
         progress.Columns(progressColumns);
 
-        if (DownloaderConfig.MyOptions is { MP4RealTimeDecryption: true, UseShakaPackager: false, Keys.Length: > 0 })
+        if (DownloaderConfig.MyOptions is { MP4RealTimeDecryption: true, DecryptionEngine: not DecryptEngine.SHAKA_PACKAGER, Keys.Length: > 0 })
             Logger.WarnMarkUp($"[darkorange3_1]{ResString.realTimeDecMessage}[/]");
 
         await progress.StartAsync(async ctx =>
diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
index a31eff8..66dab78 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleLiveRecordManager2.cs
@@ -164,7 +164,7 @@ internal class SimpleLiveRecordManager2
         var saveDir = DownloaderConfig.MyOptions.SaveDir ?? Environment.CurrentDirectory;
         var saveName = DownloaderConfig.MyOptions.SaveName != null ? $"{DownloaderConfig.MyOptions.SaveName}.{streamSpec.Language}".TrimEnd('.') : dirName;
         var headers = DownloaderConfig.Headers;
-        var decryptEngine = DownloaderConfig.MyOptions.GetDecryptEngine();
+        var decryptEngine = DownloaderConfig.MyOptions.DecryptionEngine;
 
         Logger.Debug($"dirName: {dirName}; tmpDir: {tmpDir}; saveDir: {saveDir}; saveName: {saveName}");
 
@@ -840,7 +840,7 @@ internal class SimpleLiveRecordManager2
             DownloaderConfig.MyOptions.ConcurrentDownload = true;
             DownloaderConfig.MyOptions.MP4RealTimeDecryption = true;
             DownloaderConfig.MyOptions.LiveRecordLimit = DownloaderConfig.MyOptions.LiveRecordLimit ?? TimeSpan.MaxValue;
-            if (DownloaderConfig.MyOptions is { MP4RealTimeDecryption: true, UseShakaPackager: false, Keys.Length: > 0 })
+            if (DownloaderConfig.MyOptions is { MP4RealTimeDecryption: true, DecryptionEngine: not DecryptEngine.SHAKA_PACKAGER, Keys.Length: > 0 })
                 Logger.WarnMarkUp($"[darkorange3_1]{ResString.realTimeDecMessage}[/]");
             var limit = DownloaderConfig.MyOptions.LiveRecordLimit;
             if (limit != TimeSpan.MaxValue)
diff --git a/src/N_m3u8DL-RE/Program.cs b/src/N_m3u8DL-RE/Program.cs
index b10a852..e2a0c5e 100644
--- a/src/N_m3u8DL-RE/Program.cs
+++ b/src/N_m3u8DL-RE/Program.cs
@@ -14,6 +14,7 @@ using N_m3u8DL_RE.DownloadManager;
 using N_m3u8DL_RE.CommandLine;
 using System.Net;
 using System.Net.Http.Headers;
+using N_m3u8DL_RE.Enum;
 
 namespace N_m3u8DL_RE;
 
@@ -109,10 +110,15 @@ internal class Program
         {
             throw new ArgumentException("MuxAfterDone disabled, MuxImports not allowed!");
         }
-        
-        if (option is { UseShakaPackager: true, UseMp4Decrypt: true })
+
+        if (option.UseShakaPackager) 
         {
-            throw new ArgumentException("UseShakaPackager and UseMp4Decrypt cannot be enabled simultaneously!");
+            option.DecryptionEngine = DecryptEngine.SHAKA_PACKAGER;
+        }
+        
+        if (option is { UseShakaPackager: true, DecryptionEngine: not DecryptEngine.SHAKA_PACKAGER })
+        {
+            throw new ArgumentException("UseShakaPackager and Mp4DecryptEngine not match!");
         }
 
         // LivePipeMux开启时 LiveRealTimeMerge必须开启
@@ -148,7 +154,7 @@ internal class Program
         {
             if (string.IsNullOrEmpty(option.DecryptionBinaryPath))
             {
-                if (option.UseShakaPackager)
+                if (option.DecryptionEngine is DecryptEngine.SHAKA_PACKAGER)
                 {
                     var file = GlobalUtil.FindExecutable("shaka-packager");
                     var file2 = GlobalUtil.FindExecutable("packager-linux-x64");
@@ -158,7 +164,7 @@ internal class Program
                     option.DecryptionBinaryPath = file ?? file2 ?? file3 ?? file4;
                     Logger.Extra($"shaka-packager => {option.DecryptionBinaryPath}");
                 }
-                else if (option.UseMp4Decrypt)
+                else if (option.DecryptionEngine is DecryptEngine.MP4DECRYPT)
                 {
                     var file = GlobalUtil.FindExecutable("mp4decrypt");
                     if (file == null) throw new FileNotFoundException("mp4decrypt not found!");