diff --git a/BililiveRecorder.Core/BililiveRecorder.Core.csproj b/BililiveRecorder.Core/BililiveRecorder.Core.csproj
index 0adb136..9123447 100644
--- a/BililiveRecorder.Core/BililiveRecorder.Core.csproj
+++ b/BililiveRecorder.Core/BililiveRecorder.Core.csproj
@@ -10,6 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Autofac" Version="4.8.1" />
     <PackageReference Include="NLog" Version="4.5.0-rc07" />
   </ItemGroup>
 
diff --git a/BililiveRecorder.Core/RecordedRoom.cs b/BililiveRecorder.Core/RecordedRoom.cs
index f24e545..a5e672b 100644
--- a/BililiveRecorder.Core/RecordedRoom.cs
+++ b/BililiveRecorder.Core/RecordedRoom.cs
@@ -24,8 +24,8 @@ namespace BililiveRecorder.Core
         public bool IsMonitoring => StreamMonitor.receiver.IsConnected;
         public bool IsRecording => flvStream != null;
 
-        public FlvStreamProcessor Processor; // FlvProcessor
-        public ObservableCollection<FlvClipProcessor> Clips { get; private set; } = new ObservableCollection<FlvClipProcessor>();
+        public IFlvStreamProcessor Processor; // FlvProcessor
+        public ObservableCollection<IFlvClipProcessor> Clips { get; private set; } = new ObservableCollection<IFlvClipProcessor>();
 
         internal StreamMonitor StreamMonitor { get; }
         private Settings _settings { get; }
diff --git a/BililiveRecorder.FlvProcessor/BililiveRecorder.FlvProcessor.csproj b/BililiveRecorder.FlvProcessor/BililiveRecorder.FlvProcessor.csproj
index 0c0eeaa..588bbfe 100644
--- a/BililiveRecorder.FlvProcessor/BililiveRecorder.FlvProcessor.csproj
+++ b/BililiveRecorder.FlvProcessor/BililiveRecorder.FlvProcessor.csproj
@@ -10,6 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Autofac" Version="4.8.1" />
     <PackageReference Include="NLog" Version="4.5.0-rc07" />
   </ItemGroup>
 
diff --git a/BililiveRecorder.FlvProcessor/Events.cs b/BililiveRecorder.FlvProcessor/Events.cs
index de663d4..79a065a 100644
--- a/BililiveRecorder.FlvProcessor/Events.cs
+++ b/BililiveRecorder.FlvProcessor/Events.cs
@@ -1,26 +1,21 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace BililiveRecorder.FlvProcessor
+namespace BililiveRecorder.FlvProcessor
 {
     public delegate void TagProcessedEvent(object sender, TagProcessedArgs e);
     public class TagProcessedArgs
     {
-        public FlvTag Tag;
+        public IFlvTag Tag;
     }
-
-
+    
     public delegate void ClipFinalizedEvent(object sender, ClipFinalizedArgs e);
     public class ClipFinalizedArgs
     {
-        public FlvClipProcessor ClipProcessor;
+        public IFlvClipProcessor ClipProcessor;
     }
 
     public delegate void StreamFinalizedEvent(object sender, StreamFinalizedArgs e);
     public class StreamFinalizedArgs
     {
-        public FlvStreamProcessor StreamProcessor;
+        public IFlvStreamProcessor StreamProcessor;
     }
 
 }
diff --git a/BililiveRecorder.FlvProcessor/FlvClipProcessor.cs b/BililiveRecorder.FlvProcessor/FlvClipProcessor.cs
index c121c27..b61e293 100644
--- a/BililiveRecorder.FlvProcessor/FlvClipProcessor.cs
+++ b/BililiveRecorder.FlvProcessor/FlvClipProcessor.cs
@@ -2,22 +2,21 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Text;
 
 namespace BililiveRecorder.FlvProcessor
 {
-    public class FlvClipProcessor
+    public class FlvClipProcessor : IFlvClipProcessor
     {
         private static readonly Logger logger = LogManager.GetCurrentClassLogger();
 
-        public readonly FlvMetadata Header;
-        public readonly List<FlvTag> HTags;
-        public readonly List<FlvTag> Tags;
-        private int target = -1;
+        public IFlvMetadata Header { get; }
+        public List<IFlvTag> HTags { get; }
+        public List<IFlvTag> Tags { get; }
+        private readonly int target = -1;
 
-        public Func<string> GetFileName;
+        public Func<string> GetFileName { get; set; }
 
-        public FlvClipProcessor(FlvMetadata header, List<FlvTag> head, List<FlvTag> past, uint future)
+        public FlvClipProcessor(IFlvMetadata header, List<IFlvTag> head, List<IFlvTag> past, uint future)
         {
             Header = header;
             HTags = head;
@@ -27,7 +26,7 @@ namespace BililiveRecorder.FlvProcessor
                 Tags.Count, Tags[0].TimeStamp, Tags[Tags.Count - 1].TimeStamp, (Tags[Tags.Count - 1].TimeStamp - Tags[0].TimeStamp) / 1000d);
         }
 
-        public void AddTag(FlvTag tag)
+        public void AddTag(IFlvTag tag)
         {
             Tags.Add(tag);
             if (tag.TimeStamp >= target)
diff --git a/BililiveRecorder.FlvProcessor/FlvMetadata.cs b/BililiveRecorder.FlvProcessor/FlvMetadata.cs
index 2b754b0..7a83141 100644
--- a/BililiveRecorder.FlvProcessor/FlvMetadata.cs
+++ b/BililiveRecorder.FlvProcessor/FlvMetadata.cs
@@ -6,23 +6,29 @@ using System.Text;
 
 namespace BililiveRecorder.FlvProcessor
 {
-    public class FlvMetadata
+    public class FlvMetadata : IFlvMetadata
     {
-        public IDictionary<string, object> Meta = new Dictionary<string, object>();
+        public IDictionary<string, object> Meta { get; set; } = new Dictionary<string, object>();
 
-        public static FlvMetadata Parse(byte[] data)
+        public FlvMetadata()
         {
-            var m = new FlvMetadata
+            Meta["duration"] = 0.0;
+            Meta["lasttimestamp"] = 0.0;
+        }
+
+        public FlvMetadata(byte[] data)
+        {
+            Meta = _Decode(data);
+
+            if (!Meta.ContainsKey("duration"))
             {
-                Meta = _Decode(data)
-            };
+                Meta["duration"] = 0.0;
+            }
 
-            if (!m.Meta.ContainsKey("duration"))
-                m.Meta["duration"] = 0.0;
-            if (!m.Meta.ContainsKey("lasttimestamp"))
-                m.Meta["lasttimestamp"] = 0.0;
-
-            return m;
+            if (!Meta.ContainsKey("lasttimestamp"))
+            {
+                Meta["lasttimestamp"] = 0.0;
+            }
         }
 
         public byte[] ToBytes()
diff --git a/BililiveRecorder.FlvProcessor/FlvStreamProcessor.cs b/BililiveRecorder.FlvProcessor/FlvStreamProcessor.cs
index c843898..63fea39 100644
--- a/BililiveRecorder.FlvProcessor/FlvStreamProcessor.cs
+++ b/BililiveRecorder.FlvProcessor/FlvStreamProcessor.cs
@@ -1,18 +1,15 @@
 using NLog;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.IO;
 using System.Linq;
-using System.Net;
-using System.Text;
 
 namespace BililiveRecorder.FlvProcessor
 {
     // TODO: 重构 Tag 解析流程
     // TODO: 添加测试
     // 注：下载时会按照 4 11 N bytes 下载
-    public class FlvStreamProcessor : IDisposable
+    public class FlvStreamProcessor : IFlvStreamProcessor
     {
         private static readonly Logger logger = LogManager.GetCurrentClassLogger();
 
@@ -35,22 +32,22 @@ namespace BililiveRecorder.FlvProcessor
             // 0x00, // the "0th" tag has a length of 0
         };
 
-        public FlvMetadata Metadata = null;
+        public IFlvMetadata Metadata { get; set; } = null;
         public event TagProcessedEvent TagProcessed;
         public event StreamFinalizedEvent StreamFinalized;
-        public Func<string> GetFileName;
+        public Func<string> GetFileName { get; set; }
 
-        public uint Clip_Past = 90;
-        public uint Clip_Future = 30;
+        public uint Clip_Past { get; set; } = 90;
+        public uint Clip_Future { get; set; } = 30;
         private readonly bool _noClip = false;
 
         private bool _headerParsed = false;
-        private readonly List<FlvTag> HTags = new List<FlvTag>();
-        private readonly List<FlvTag> Tags = new List<FlvTag>();
+        private readonly List<IFlvTag> HTags = new List<IFlvTag>();
+        private readonly List<IFlvTag> Tags = new List<IFlvTag>();
         private readonly MemoryStream _buffer = new MemoryStream();
         private readonly MemoryStream _data = new MemoryStream();
-        private FlvTag currentTag = null;
-        private object _writelock = new object();
+        private IFlvTag currentTag = null;
+        private readonly object _writelock = new object();
         private bool Finallized = false;
 
         private readonly FileStream _fs;
@@ -85,7 +82,9 @@ namespace BililiveRecorder.FlvProcessor
         public void AddBytes(byte[] data)
         {
             lock (_writelock)
+            {
                 _AddBytes(data);
+            }
         }
 
         private void _AddBytes(byte[] data)
@@ -104,10 +103,15 @@ namespace BililiveRecorder.FlvProcessor
                 }
                 var r = new bool[FLV_HEADER_BYTES.Length];
                 for (int i = 0; i < FLV_HEADER_BYTES.Length; i++)
+                {
                     r[i] = data[i] == FLV_HEADER_BYTES[i];
+                }
+
                 bool succ = r.All(x => x);
                 if (!succ)
+                {
                     throw new NotSupportedException("Not FLV Stream or Not Supported"); // TODO: custom Exception.
+                }
 
                 _headerParsed = true;
                 _AddBytes(data.Skip(FLV_HEADER_BYTES.Length).ToArray());
@@ -140,7 +144,7 @@ namespace BililiveRecorder.FlvProcessor
             }
         }
 
-        private void _TagCreated(FlvTag tag)
+        private void _TagCreated(IFlvTag tag)
         {
             if (Metadata == null)
             {
@@ -149,7 +153,7 @@ namespace BililiveRecorder.FlvProcessor
                     _fs?.Write(FLV_HEADER_BYTES, 0, FLV_HEADER_BYTES.Length);
                     _fs?.Write(new byte[] { 0, 0, 0, 0, }, 0, 4);
 
-                    Metadata = FlvMetadata.Parse(tag.Data);
+                    Metadata = new FlvMetadata(tag.Data);
 
                     // TODO: 添加录播姬标记、录制信息
 
@@ -202,7 +206,10 @@ namespace BililiveRecorder.FlvProcessor
                 {
                     tag.TimeStamp -= BaseTimeStamp; // 修复时间戳
                     if (tag.TimeStamp < 0)
+                    {
                         tag.TimeStamp = 0;
+                    }
+
                     MaxTimeStamp = Math.Max(MaxTimeStamp, tag.TimeStamp);
                 }
                 else
@@ -221,7 +228,9 @@ namespace BililiveRecorder.FlvProcessor
                         LasttimeRemovedTimestamp = MaxTimeStamp;
                         int max_remove_index = Tags.FindLastIndex(x => x.IsVideoKeyframe && ((MaxTimeStamp - x.TimeStamp) > (Clip_Past * SEC_TO_MS)));
                         if (max_remove_index > 0)
+                        {
                             Tags.RemoveRange(0, max_remove_index);
+                        }
                         // Tags.RemoveRange(0, max_remove_index + 1 - 1);
                         // 给将来的备注：这里是故意 + 1 - 1 的，因为要保留选中的那个关键帧， + 1 就把关键帧删除了
                     }
@@ -242,7 +251,7 @@ namespace BililiveRecorder.FlvProcessor
             _buffer.Write(data, 0, data.Length);
             long dataLen = _buffer.Position;
             _buffer.Position = 0;
-            FlvTag tag = new FlvTag();
+            IFlvTag tag = new FlvTag();
 
             // Previous Tag Size
             _buffer.Read(b, 0, 4);
@@ -272,7 +281,7 @@ namespace BililiveRecorder.FlvProcessor
             _AddBytes(rest);
         }
 
-        public FlvClipProcessor Clip()
+        public IFlvClipProcessor Clip()
         {
             // 如果禁用 clip 功能 或者 已经结束处理了
             if (_noClip || Finallized)
@@ -284,7 +293,7 @@ namespace BililiveRecorder.FlvProcessor
                 lock (_writelock)
                 {
                     logger.Info("剪辑处理中，将会保存过去 {0} 秒和将来 {1} 秒的直播流", (Tags[Tags.Count - 1].TimeStamp - Tags[0].TimeStamp) / 1000d, Clip_Future);
-                    return new FlvClipProcessor(Metadata, HTags, new List<FlvTag>(Tags.ToArray()), Clip_Future);
+                    return new FlvClipProcessor(Metadata, HTags, new List<IFlvTag>(Tags.ToArray()), Clip_Future);
                 }
             }
         }
@@ -292,6 +301,7 @@ namespace BililiveRecorder.FlvProcessor
         public void FinallizeFile()
         {
             if (!Finallized)
+            {
                 lock (_writelock)
                 {
                     try
@@ -322,6 +332,7 @@ namespace BililiveRecorder.FlvProcessor
                         StreamFinalized?.Invoke(this, new StreamFinalizedArgs() { StreamProcessor = this });
                     }
                 }
+            }
         }
 
         #region IDisposable Support
diff --git a/BililiveRecorder.FlvProcessor/FlvTag.cs b/BililiveRecorder.FlvProcessor/FlvTag.cs
index 01b2144..cd5f183 100644
--- a/BililiveRecorder.FlvProcessor/FlvTag.cs
+++ b/BililiveRecorder.FlvProcessor/FlvTag.cs
@@ -1,22 +1,19 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
-using System.Text;
 
 namespace BililiveRecorder.FlvProcessor
 {
-    public class FlvTag
+    public class FlvTag : IFlvTag
     {
-        public TagType TagType = 0;
-        public int TagSize = 0;
-        public int TimeStamp = 0;
-        public byte[] StreamId = new byte[3];
+        public TagType TagType { get; set; } = 0;
+        public int TagSize { get; set; } = 0;
+        public int TimeStamp { get; set; } = 0;
+        public byte[] StreamId { get; set; } = new byte[3];
 
         public bool IsVideoKeyframe => _IsVideoKeyframe != -1 ? _IsVideoKeyframe == 1 : 1 == (_IsVideoKeyframe = _ParseIsVideoKeyframe());
         private int _IsVideoKeyframe = -1;
 
-        public byte[] Data = null;
+        public byte[] Data { get; set; } = null;
 
         public byte[] ToBytes(bool useDataSize, int offset = 0)
         {
@@ -38,9 +35,14 @@ namespace BililiveRecorder.FlvProcessor
         private int _ParseIsVideoKeyframe()
         {
             if (TagType != TagType.VIDEO)
+            {
                 return 0;
+            }
+
             if (Data.Length < 1)
+            {
                 return -1;
+            }
 
             const byte mask = 0b00001111;
             const byte compare = 0b00011111;
diff --git a/BililiveRecorder.FlvProcessor/IFlvClipProcessor.cs b/BililiveRecorder.FlvProcessor/IFlvClipProcessor.cs
new file mode 100644
index 0000000..3b24bc1
--- /dev/null
+++ b/BililiveRecorder.FlvProcessor/IFlvClipProcessor.cs
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+
+namespace BililiveRecorder.FlvProcessor
+{
+    public interface IFlvClipProcessor
+    {
+        IFlvMetadata Header { get; }
+        List<IFlvTag> HTags { get; }
+        List<IFlvTag> Tags { get; }
+        Func<string> GetFileName { get; set; }
+
+        void AddTag(IFlvTag tag);
+        void FinallizeFile();
+        event ClipFinalizedEvent ClipFinalized;
+
+    }
+}
diff --git a/BililiveRecorder.FlvProcessor/IFlvMetadata.cs b/BililiveRecorder.FlvProcessor/IFlvMetadata.cs
new file mode 100644
index 0000000..d790de5
--- /dev/null
+++ b/BililiveRecorder.FlvProcessor/IFlvMetadata.cs
@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+
+namespace BililiveRecorder.FlvProcessor
+{
+    public interface IFlvMetadata
+    {
+        IDictionary<string, object> Meta { get; set; }
+        byte[] ToBytes();
+    }
+}
diff --git a/BililiveRecorder.FlvProcessor/IFlvStreamProcessor.cs b/BililiveRecorder.FlvProcessor/IFlvStreamProcessor.cs
new file mode 100644
index 0000000..bcec1c5
--- /dev/null
+++ b/BililiveRecorder.FlvProcessor/IFlvStreamProcessor.cs
@@ -0,0 +1,24 @@
+using System;
+
+namespace BililiveRecorder.FlvProcessor
+{
+    public interface IFlvStreamProcessor : IDisposable
+    {
+        event TagProcessedEvent TagProcessed;
+        event StreamFinalizedEvent StreamFinalized;
+
+        IFlvMetadata Metadata { get; set; }
+        Func<string> GetFileName { get; set; }
+        uint Clip_Past { get; set; }
+        uint Clip_Future { get; set; }
+        int LasttimeRemovedTimestamp { get; }
+        int MaxTimeStamp { get; }
+        int BaseTimeStamp { get; }
+        int TagVideoCount { get; }
+        int TagAudioCount { get; }
+
+        void AddBytes(byte[] data);
+        IFlvClipProcessor Clip();
+        void FinallizeFile();
+    }
+}
diff --git a/BililiveRecorder.FlvProcessor/IFlvTag.cs b/BililiveRecorder.FlvProcessor/IFlvTag.cs
new file mode 100644
index 0000000..bec5faf
--- /dev/null
+++ b/BililiveRecorder.FlvProcessor/IFlvTag.cs
@@ -0,0 +1,17 @@
+using System.IO;
+
+namespace BililiveRecorder.FlvProcessor
+{
+    public interface IFlvTag
+    {
+        TagType TagType { get; set; }
+        int TagSize { get; set; }
+        int TimeStamp { get; set; }
+        byte[] StreamId { get; set; }
+        bool IsVideoKeyframe { get; }
+        byte[] Data { get; set; }
+
+        byte[] ToBytes(bool useDataSize, int offset = 0);
+        void WriteTo(Stream stream, int offset = 0);
+    }
+}
diff --git a/BililiveRecorder.WPF/BililiveRecorder.WPF.csproj b/BililiveRecorder.WPF/BililiveRecorder.WPF.csproj
index 94cbf1e..8e92594 100644
--- a/BililiveRecorder.WPF/BililiveRecorder.WPF.csproj
+++ b/BililiveRecorder.WPF/BililiveRecorder.WPF.csproj
@@ -75,6 +75,9 @@
     <SignAssembly>false</SignAssembly>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Autofac, Version=4.8.1.0, Culture=neutral, PublicKeyToken=17863af14b0044da, processorArchitecture=MSIL">
+      <HintPath>..\packages\Autofac.4.8.1\lib\net45\Autofac.dll</HintPath>
+    </Reference>
     <Reference Include="Microsoft.WindowsAPICodePack, Version=1.1.2.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\WindowsAPICodePack-Core.1.1.2\lib\Microsoft.WindowsAPICodePack.dll</HintPath>
     </Reference>
diff --git a/BililiveRecorder.WPF/packages.config b/BililiveRecorder.WPF/packages.config
index 2f4c6bc..3d1c844 100644
--- a/BililiveRecorder.WPF/packages.config
+++ b/BililiveRecorder.WPF/packages.config
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="Autofac" version="4.8.1" targetFramework="net462" />
   <package id="NLog" version="4.5.0-rc07" targetFramework="net462" />
   <package id="NLog.Config" version="4.5.0-rc07" targetFramework="net462" />
   <package id="NLog.Schema" version="4.5.0-rc07" targetFramework="net462" />