feat: add support for recording mode fallback

BililiveRecorder.Core/IRoom.cs

@@ -39,5 +39,7 @@ namespace BililiveRecorder.Core
         void StopRecord();
         void SplitOutput();
         Task RefreshRoomInfoAsync();
+
+        void MarkNextRecordShouldUseRawMode();
     }
 }

BililiveRecorder.Core/Recording/IRecordTaskFactory.cs

@@ -1,7 +1,9 @@
+using BililiveRecorder.Core.Config;
+
 namespace BililiveRecorder.Core.Recording
 {
     internal interface IRecordTaskFactory
     {
-        IRecordTask CreateRecordTask(IRoom room);
+        IRecordTask CreateRecordTask(IRoom room, RecordMode? recordModeOverride = null);
     }
 }

BililiveRecorder.Core/Recording/RecordTaskFactory.cs

@@ -21,10 +21,14 @@ namespace BililiveRecorder.Core.Recording
             this.factoryStandard = ActivatorUtilities.CreateFactory(typeof(StandardRecordTask), new[] { typeof(IRoom) });
         }
 
-        public IRecordTask CreateRecordTask(IRoom room)
+        public IRecordTask CreateRecordTask(IRoom room, RecordMode? recordModeOverride = null)
         {
             var recordMode = room.RoomConfig.RecordMode;
-            this.logger.Debug("Create record task with mode {RecordMode} for room {RoomId}", recordMode, room.RoomConfig.RoomId);
+            if (recordModeOverride.HasValue)
+            {
+                recordMode = recordModeOverride.Value;
+            }
+            this.logger.Debug("Create record task with mode {RecordMode} for room {RoomId}, override: {Override}", recordMode, room.RoomConfig.RoomId, recordModeOverride);
             return recordMode switch
             {
                 RecordMode.RawData => (IRecordTask)this.factoryRawData(this.serviceProvider, new[] { room }),

BililiveRecorder.Core/Recording/StandardRecordTask.cs

@@ -203,8 +203,8 @@ namespace BililiveRecorder.Core.Recording
             catch (UnsupportedCodecException ex)
             {
                 // 直播流不是 H.264
-                this.logger.Warning(ex, "不支持此直播流的视频编码格式（只支持 H.264），本场直播不再自动启动录制。");
-                this.room.StopRecord(); // 停止自动重试
+                this.logger.Warning(ex, "不支持此直播流的视频编码格式（只支持 H.264），下次录制会尝试使用原始模式录制");
+                this.room.MarkNextRecordShouldUseRawMode();
             }
             catch (OperationCanceledException ex)
             {

BililiveRecorder.Core/Room.cs

@@ -8,6 +8,7 @@ using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using BililiveRecorder.Core.Api;
+using BililiveRecorder.Core.Config;
 using BililiveRecorder.Core.Config.V3;
 using BililiveRecorder.Core.Danmaku;
 using BililiveRecorder.Core.Event;
@@ -54,6 +55,7 @@ namespace BililiveRecorder.Core
         private bool danmakuConnected;
         private bool streaming;
         private bool autoRecordForThisSession = true;
+        private bool nextRecordShouldUseRawMode = false;
 
         private IRecordTask? recordTask;
         private DateTimeOffset danmakuClientConnectTime;
@@ -229,6 +231,11 @@ namespace BililiveRecorder.Core
             }
         }
 
+        public void MarkNextRecordShouldUseRawMode()
+        {
+            this.nextRecordShouldUseRawMode = true;
+        }
+
         private static readonly TimeSpan TitleRegexMatchTimeout = TimeSpan.FromSeconds(0.5);
 
         /// <exception cref="ArgumentException" />
@@ -277,7 +284,9 @@ namespace BililiveRecorder.Core
                     this.logger.Warning(ex, "检查标题是否匹配跳过录制正则表达式时出错");
                 }
 
-                var task = this.recordTaskFactory.CreateRecordTask(this);
+                var task = this.recordTaskFactory.CreateRecordTask(this, this.nextRecordShouldUseRawMode ? RecordMode.RawData : null);
+                this.nextRecordShouldUseRawMode = false;
+
                 task.IOStats += this.RecordTask_IOStats;
                 task.RecordingStats += this.RecordTask_RecordingStats;
                 task.RecordFileOpening += this.RecordTask_RecordFileOpening;
@@ -516,7 +525,7 @@ namespace BililiveRecorder.Core
         {
             const int MAX_ATTEMPT = 3;
             var attempt = 0;
-retry:
+        retry:
             try
             {
                 var coverUrl = this.RawBilibiliApiJsonData?["room_info"]?["cover"]?.ToObject<string>();