优化Init文件加密判断 (#562)

兼容了非标准的m3u8, 详情请看issue #550

Author: nilaoda

src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs

@@ -17,7 +17,7 @@ namespace N_m3u8DL_RE.CommandLine;
 
 internal static partial class CommandInvoker
 {
-    public const string VERSION_INFO = "N_m3u8DL-RE (Beta version) 20241203";
+    public const string VERSION_INFO = "N_m3u8DL-RE (Beta version) 20241216";
 
     [GeneratedRegex("((best|worst)\\d*|all)")]
     private static partial Regex ForStrRegex();

src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs

@@ -177,7 +177,7 @@ private async Task<bool> DownloadStreamAsync(StreamSpec streamSpec, ProgressTask
                 // 从文件读取KEY
                 await SearchKeyAsync(currentKID);
                 // 实时解密
-                if (streamSpec.Playlist.MediaInit.IsEncrypted && DownloaderConfig.MyOptions.MP4RealTimeDecryption && !string.IsNullOrEmpty(currentKID) && StreamExtractor.ExtractorType != ExtractorType.MSS)
+                if ((streamSpec.Playlist.MediaInit.IsEncrypted || currentKID?.Length > 0) && 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));