diff --git a/src/JT1078.Flv/FlvEncoder.cs b/src/JT1078.Flv/FlvEncoder.cs
index 086bdcc..e24da09 100644
--- a/src/JT1078.Flv/FlvEncoder.cs
+++ b/src/JT1078.Flv/FlvEncoder.cs
@@ -45,175 +45,7 @@ namespace JT1078.Flv
         {
             logger = loggerFactory.CreateLogger("FlvEncoder");
         }
-        internal byte[] CreateScriptTagFrame(int width, int height, double frameRate = 25d)
-        {
-            byte[] buffer = FlvArrayPool.Rent(1024);
-            try
-            {
-                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                //flv body script tag
-                //flv body tag header
-                FlvTags flvTags = new FlvTags();
-                flvTags.Type = TagType.ScriptData;
-                flvTags.Timestamp = 0;
-                flvTags.TimestampExt = 0;
-                flvTags.StreamId = 0;
-                //flv body tag body
-                flvTags.DataTagsData = new Amf3();
-                flvTags.DataTagsData.Amf3Metadatas = new List<IAmf3Metadata>();
-                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_Duration
-                {
-                    Value = 0d
-                });
-                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_VideoDataRate
-                {
-                    Value = 0d
-                });
-                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_VideoCodecId
-                {
-                    Value = 7d
-                });
-                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_FrameRate
-                {
-                    Value = frameRate
-                });
-                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_Width
-                {
-                    Value = width
-                });
-                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_Height
-                {
-                    Value = height
-                });
-                flvMessagePackWriter.WriteFlvTag(flvTags);
-                return flvMessagePackWriter.FlushAndGetArray();
-            }
-            finally
-            {
-                FlvArrayPool.Return(buffer);
-            }
-        }
-        internal byte[] CreateVideoTag0Frame(byte[] spsRawData, byte[] ppsRawData, SPSInfo spsInfo)
-        {
-            byte[] buffer = FlvArrayPool.Rent(2048);
-            try
-            {
-                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                //flv body video tag
-                //flv body tag header
-                FlvTags flvTags = new FlvTags();
-                flvTags.Type = TagType.Video;
-                flvTags.Timestamp = 0;
-                flvTags.TimestampExt = 0;
-                flvTags.StreamId = 0;
-                //flv body tag body
-                flvTags.VideoTagsData = new VideoTags();
-                flvTags.VideoTagsData.FrameType = FrameType.KeyFrame;
-                flvTags.VideoTagsData.VideoData = new AvcVideoPacke();
-                flvTags.VideoTagsData.VideoData.AvcPacketType = AvcPacketType.SequenceHeader;
-                flvTags.VideoTagsData.VideoData.CompositionTime = 0;
-                AVCDecoderConfigurationRecord aVCDecoderConfigurationRecord = new AVCDecoderConfigurationRecord();
-                aVCDecoderConfigurationRecord.AVCProfileIndication = spsInfo.profileIdc;
-                aVCDecoderConfigurationRecord.ProfileCompatibility = (byte)spsInfo.profileCompat;
-                aVCDecoderConfigurationRecord.AVCLevelIndication = spsInfo.levelIdc;
-                aVCDecoderConfigurationRecord.NumOfPictureParameterSets = 1;
-                aVCDecoderConfigurationRecord.PPSBuffer = ppsRawData;
-                aVCDecoderConfigurationRecord.SPSBuffer = spsRawData;
-                flvTags.VideoTagsData.VideoData.AVCDecoderConfiguration = aVCDecoderConfigurationRecord;
-                flvMessagePackWriter.WriteFlvTag(flvTags);
-                return flvMessagePackWriter.FlushAndGetArray();
-            }
-            finally
-            {
-                FlvArrayPool.Return(buffer);
-            }
-        }
-        internal byte[] CreateSecondVideoTag0Frame(byte[] spsRawData, byte[] ppsRawData, SPSInfo spsInfo)
-        {
-            byte[] buffer = FlvArrayPool.Rent(2048);
-            try
-            {
-                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                //flv body video tag
-                //flv body tag header
-                FlvTags flvTags = new FlvTags();
-                flvTags.Type = TagType.Video;
-                flvTags.Timestamp =0;
-                flvTags.TimestampExt = 0;
-                flvTags.StreamId = 0;
-                //flv body tag body
-                flvTags.VideoTagsData = new VideoTags();
-                flvTags.VideoTagsData.FrameType = FrameType.KeyFrame;
-                flvTags.VideoTagsData.VideoData = new AvcVideoPacke();
-                flvTags.VideoTagsData.VideoData.AvcPacketType = AvcPacketType.SequenceHeader;
-                flvTags.VideoTagsData.VideoData.CompositionTime = 0;
-                AVCDecoderConfigurationRecord aVCDecoderConfigurationRecord = new AVCDecoderConfigurationRecord();
-                aVCDecoderConfigurationRecord.AVCProfileIndication = spsInfo.profileIdc;
-                aVCDecoderConfigurationRecord.ProfileCompatibility = (byte)spsInfo.profileCompat;
-                aVCDecoderConfigurationRecord.AVCLevelIndication = spsInfo.levelIdc;
-                aVCDecoderConfigurationRecord.NumOfPictureParameterSets = 1;
-                aVCDecoderConfigurationRecord.PPSBuffer = ppsRawData;
-                aVCDecoderConfigurationRecord.SPSBuffer = spsRawData;
-                flvTags.VideoTagsData.VideoData.AVCDecoderConfiguration = aVCDecoderConfigurationRecord;
-                flvMessagePackWriter.WriteFlvTag(flvTags);
-                return flvMessagePackWriter.FlushAndGetArray();
-            }
-            finally
-            {
-                FlvArrayPool.Return(buffer);
-            }
-        }
-        internal byte[] CreateVideoTagOtherFrame(FlvFrameInfo flvFrameInfo, H264NALU nALU, H264NALU sei)
-        {
-            byte[] buffer = FlvArrayPool.Rent(65535);
-            try
-            {
-                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                //flv body video tag
-                //flv body tag header
-                FlvTags flvTags = new FlvTags();
-                flvTags.Type = TagType.Video;
-                //pts
-                flvTags.Timestamp = flvFrameInfo.Interval;
-                flvTags.TimestampExt = 0;
-                flvTags.StreamId = 0;
-                //flv body tag body
-                flvTags.VideoTagsData = new VideoTags();
-                flvTags.VideoTagsData.VideoData = new AvcVideoPacke();
-                flvTags.VideoTagsData.VideoData.AvcPacketType = AvcPacketType.Raw;
-                if (nALU.NALUHeader.NalUnitType == 5 || nALU.DataType == JT1078DataType.视频I帧)
-                {
-                    flvTags.VideoTagsData.FrameType = FrameType.KeyFrame;
-                }
-                else
-                {
-                    flvTags.VideoTagsData.FrameType = FrameType.InterFrame;
-                }
-                if(flvFrameInfo.DataType== JT1078DataType.视频I帧)
-                {
-                    //cts
-                    flvTags.VideoTagsData.VideoData.CompositionTime = nALU.LastIFrameInterval;
-                }
-                else
-                {
-                    //cts
-                    flvTags.VideoTagsData.VideoData.CompositionTime = nALU.LastFrameInterval;
-                }
-                flvTags.VideoTagsData.VideoData.MultiData = new List<byte[]>();
-                flvTags.VideoTagsData.VideoData.MultiData.Add(nALU.RawData);
-                //忽略sei
-                //if (sei != null && sei.RawData != null && sei.RawData.Length > 0)
-                //{
-                //    flvTags.VideoTagsData.VideoData.MultiData.Add(sei.RawData);
-                //}
-                flvMessagePackWriter.WriteFlvTag(flvTags);
-                return flvMessagePackWriter.FlushAndGetArray();
-            }
-            finally
-            {
-                FlvArrayPool.Return(buffer);
-            }
-        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -227,7 +59,7 @@ namespace JT1078.Flv
             try
             {
                 FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                H264NALU sps=null, pps=null, sei=null;
+                H264NALU sps = null, pps = null, sei = null;
                 foreach (var naln in nALUs)
                 {
                     key = key ?? naln.GetKey();
@@ -260,11 +92,11 @@ namespace JT1078.Flv
                                             logger.LogDebug($"Cache:{spsInfoCache.height}-{spsInfoCache.width},Current:{spsInfo.height}-{spsInfo.width}");
                                         }
                                     }
-                                    var secondFlvKeyFrame=CreateSecondFlvKeyFrame(sps.RawData, pps.RawData, spsInfo, flvFrameInfo);
+                                    var secondFlvKeyFrame = CreateFirstFlvKeyFrame(sps.RawData, pps.RawData, spsInfo, flvFrameInfo.PreviousTagSize);
                                     flvMessagePackWriter.WriteArray(secondFlvKeyFrame.Buffer);
                                     flvFrameInfo.PreviousTagSize = secondFlvKeyFrame.PreviousTagSize;
                                     FlvFrameInfoDict.TryUpdate(key, flvFrameInfo, flvFrameInfo);
-                                    if(FirstFlvFrameCache.TryGetValue(key,out var firstFlvFrameCacche))
+                                    if (FirstFlvFrameCache.TryGetValue(key, out var firstFlvFrameCacche))
                                     {
                                         FirstFlvFrameCache.TryUpdate(key, (secondFlvKeyFrame.PreviousTagSize, secondFlvKeyFrame.Buffer, true), firstFlvFrameCacche);
                                     }
@@ -283,13 +115,14 @@ namespace JT1078.Flv
                                 }
                             }
                             //cache PreviousTagSize
-                            FlvFrameInfoDict.TryAdd(key, new FlvFrameInfo{
-                                    PreviousTagSize = firstFlvKeyFrame.PreviousTagSize,
-                                    Interval = (uint)(pps.Timestamp - sps.Timestamp),
-                                    Timestamp= pps.Timestamp,
-                                }
-                            ); 
-                            FirstFlvFrameCache.TryAdd(key, (firstFlvKeyFrame.PreviousTagSize, firstFlvKeyFrame.Buffer, false));      
+                            FlvFrameInfoDict.TryAdd(key, new FlvFrameInfo
+                            {
+                                PreviousTagSize = firstFlvKeyFrame.PreviousTagSize,
+                                Interval = (uint)(pps.Timestamp - sps.Timestamp),
+                                Timestamp = pps.Timestamp,
+                            }
+                            );
+                            FirstFlvFrameCache.TryAdd(key, (firstFlvKeyFrame.PreviousTagSize, firstFlvKeyFrame.Buffer, false));
                             VideoSPSDict.TryAdd(key, spsInfo);
                         }
                         sps = null;
@@ -306,9 +139,26 @@ namespace JT1078.Flv
                     //7 8 6 5 1 1 1 1 7 8 6 5 1 1 1 1 1 7 8 6 5 1 1 1 1 1
                     switch (naln.NALUHeader.NalUnitType)
                     {
+#warning                是否需要IDR帧？ 每次发送IDR帧？ 在测试的时候，是否由于图像变化不大所以不需要IDR帧？
                         case 5:// IDR
+                            if (FlvFrameInfoDict.TryGetValue(key, out FlvFrameInfo idrInfo))
+                            {
+                                //当前的1078包与上一包1078的时间戳相减再进行累加
+                                uint interval = (uint)(naln.Timestamp - idrInfo.Timestamp);
+                                idrInfo.Interval += interval;
+                                idrInfo.Timestamp = naln.Timestamp;
+                                // PreviousTagSize
+                                flvMessagePackWriter.WriteUInt32(idrInfo.PreviousTagSize);
+                                // Data Tag Frame
+                                var flvFrameBuffer = CreateVideoTagOtherFrame(idrInfo, naln, sei);
+                                flvMessagePackWriter.WriteArray(flvFrameBuffer);
+                                idrInfo.PreviousTagSize = (uint)flvFrameBuffer.Length;
+                                idrInfo.LastDataType = naln.DataType;
+                                FlvFrameInfoDict.TryUpdate(key, idrInfo, idrInfo);
+                            }
+                            break;
                         case 1:// I/P/B
-                            if (FlvFrameInfoDict.TryGetValue(key, out FlvFrameInfo  flvFrameInfo))
+                            if (FlvFrameInfoDict.TryGetValue(key, out FlvFrameInfo flvFrameInfo))
                             {
                                 //当前的1078包与上一包1078的时间戳相减再进行累加
                                 uint interval = (uint)(naln.Timestamp - flvFrameInfo.Timestamp);
@@ -320,7 +170,7 @@ namespace JT1078.Flv
                                 var flvFrameBuffer = CreateVideoTagOtherFrame(flvFrameInfo, naln, sei);
                                 flvMessagePackWriter.WriteArray(flvFrameBuffer);
                                 flvFrameInfo.PreviousTagSize = (uint)flvFrameBuffer.Length;
-                                flvFrameInfo.DataType = naln.DataType;
+                                flvFrameInfo.LastDataType = naln.DataType;
                                 FlvFrameInfoDict.TryUpdate(key, flvFrameInfo, flvFrameInfo);
                             }
                             break;
@@ -344,56 +194,7 @@ namespace JT1078.Flv
                 FlvArrayPool.Return(buffer);
             }
         }
-        internal (byte[] Buffer, uint PreviousTagSize) CreateFirstFlvKeyFrame(byte[] spsRawData, byte[] ppsRawData, SPSInfo spsInfo)
-        {
-            byte[] buffer = FlvArrayPool.Rent(65535);
-            try
-            {
-                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                //flv body PreviousTagSize awalys 0
-                flvMessagePackWriter.WriteUInt32(0);
-                //flv body script tag
-                var scriptTagFrameBuffer= CreateScriptTagFrame(spsInfo.width, spsInfo.height);
-                flvMessagePackWriter.WriteArray(scriptTagFrameBuffer);
-                //flv script tag PreviousTagSize
-                flvMessagePackWriter.WriteUInt32((uint)scriptTagFrameBuffer.Length);
-                //flv body video tag 0
-                var videoTagFrame0Buffer= CreateVideoTag0Frame(spsRawData, ppsRawData, spsInfo);
-                flvMessagePackWriter.WriteArray(videoTagFrame0Buffer);
-                uint videoTag0PreviousTagSize = (uint)videoTagFrame0Buffer.Length;
-                return (flvMessagePackWriter.FlushAndGetArray(), videoTag0PreviousTagSize);
-            }
-            finally
-            {
-                FlvArrayPool.Return(buffer);
-            }
-        }
-        internal (byte[] Buffer,uint PreviousTagSize) CreateSecondFlvKeyFrame(byte[] spsRawData, byte[] ppsRawData, SPSInfo spsInfo, FlvFrameInfo flvFrameInfo)
-        {
-            byte[] buffer = FlvArrayPool.Rent(65535);
-            try
-            {
-                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-                //flv body PreviousTagSize awalys 0
-                //当首包的时候为 0
-                //当切花主次码流的时候需要根据上一包的大小
-                flvMessagePackWriter.WriteUInt32(flvFrameInfo.PreviousTagSize);
-                //flv body script tag
-                var scriptTagFrameBuffer = CreateScriptTagFrame(spsInfo.width, spsInfo.height);
-                flvMessagePackWriter.WriteArray(scriptTagFrameBuffer);
-                //flv script tag PreviousTagSize
-                flvMessagePackWriter.WriteUInt32((uint)scriptTagFrameBuffer.Length);
-                //flv body video tag 0
-                var videoTagFrame0Buffer = CreateSecondVideoTag0Frame(spsRawData, ppsRawData, spsInfo);
-                flvMessagePackWriter.WriteArray(videoTagFrame0Buffer);
-                uint videoTag0PreviousTagSize = (uint)videoTagFrame0Buffer.Length;
-                return (flvMessagePackWriter.FlushAndGetArray(), videoTag0PreviousTagSize);
-            }
-            finally
-            {
-                FlvArrayPool.Return(buffer);
-            }
-        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -449,6 +250,168 @@ namespace JT1078.Flv
              }
             return default;
         }
+
+        internal byte[] CreateScriptTagFrame(int width, int height, double frameRate = 25d)
+        {
+            byte[] buffer = FlvArrayPool.Rent(1024);
+            try
+            {
+                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
+                //flv body script tag
+                //flv body tag header
+                FlvTags flvTags = new FlvTags();
+                flvTags.Type = TagType.ScriptData;
+                flvTags.Timestamp = 0;
+                flvTags.TimestampExt = 0;
+                flvTags.StreamId = 0;
+                //flv body tag body
+                flvTags.DataTagsData = new Amf3();
+                flvTags.DataTagsData.Amf3Metadatas = new List<IAmf3Metadata>();
+                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_Duration
+                {
+                    Value = 0d
+                });
+                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_VideoDataRate
+                {
+                    Value = 0d
+                });
+                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_VideoCodecId
+                {
+                    Value = 7d
+                });
+                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_FrameRate
+                {
+                    Value = frameRate
+                });
+                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_Width
+                {
+                    Value = width
+                });
+                flvTags.DataTagsData.Amf3Metadatas.Add(new Amf3Metadata_Height
+                {
+                    Value = height
+                });
+                flvMessagePackWriter.WriteFlvTag(flvTags);
+                return flvMessagePackWriter.FlushAndGetArray();
+            }
+            finally
+            {
+                FlvArrayPool.Return(buffer);
+            }
+        }
+        internal byte[] CreateVideoTag0Frame(byte[] spsRawData, byte[] ppsRawData, SPSInfo spsInfo)
+        {
+            byte[] buffer = FlvArrayPool.Rent(2048);
+            try
+            {
+                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
+                //flv body video tag
+                //flv body tag header
+                FlvTags flvTags = new FlvTags();
+                flvTags.Type = TagType.Video;
+                flvTags.Timestamp = 0;
+                flvTags.TimestampExt = 0;
+                flvTags.StreamId = 0;
+                //flv body tag body
+                flvTags.VideoTagsData = new VideoTags();
+                flvTags.VideoTagsData.FrameType = FrameType.KeyFrame;
+                flvTags.VideoTagsData.VideoData = new AvcVideoPacke();
+                flvTags.VideoTagsData.VideoData.AvcPacketType = AvcPacketType.SequenceHeader;
+                flvTags.VideoTagsData.VideoData.CompositionTime = 0;
+                AVCDecoderConfigurationRecord aVCDecoderConfigurationRecord = new AVCDecoderConfigurationRecord();
+                aVCDecoderConfigurationRecord.AVCProfileIndication = spsInfo.profileIdc;
+                aVCDecoderConfigurationRecord.ProfileCompatibility = (byte)spsInfo.profileCompat;
+                aVCDecoderConfigurationRecord.AVCLevelIndication = spsInfo.levelIdc;
+                aVCDecoderConfigurationRecord.NumOfPictureParameterSets = 1;
+                aVCDecoderConfigurationRecord.PPSBuffer = ppsRawData;
+                aVCDecoderConfigurationRecord.SPSBuffer = spsRawData;
+                flvTags.VideoTagsData.VideoData.AVCDecoderConfiguration = aVCDecoderConfigurationRecord;
+                flvMessagePackWriter.WriteFlvTag(flvTags);
+                return flvMessagePackWriter.FlushAndGetArray();
+            }
+            finally
+            {
+                FlvArrayPool.Return(buffer);
+            }
+        }
+        internal byte[] CreateVideoTagOtherFrame(FlvFrameInfo flvFrameInfo, H264NALU nALU, H264NALU sei)
+        {
+            byte[] buffer = FlvArrayPool.Rent(65535);
+            try
+            {
+                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
+                //flv body video tag
+                //flv body tag header
+                FlvTags flvTags = new FlvTags();
+                flvTags.Type = TagType.Video;
+                //pts
+                flvTags.Timestamp = flvFrameInfo.Interval;
+                flvTags.TimestampExt = 0;
+                flvTags.StreamId = 0;
+                //flv body tag body
+                flvTags.VideoTagsData = new VideoTags();
+                flvTags.VideoTagsData.VideoData = new AvcVideoPacke();
+                flvTags.VideoTagsData.VideoData.AvcPacketType = AvcPacketType.Raw;
+                //1: keyframe (for AVC, a seekable frame) —— 即H.264的IDR帧；
+                //2: inter frame(for AVC, a non - seekable frame) —— H.264的普通I帧；
+                //ref:https://www.cnblogs.com/chyingp/p/flv-getting-started.html
+                if (nALU.NALUHeader.NalUnitType == 5)
+                {
+                    flvTags.VideoTagsData.FrameType = FrameType.KeyFrame;
+                }
+                else
+                {
+                    flvTags.VideoTagsData.FrameType = FrameType.InterFrame;
+                }
+                if (flvFrameInfo.LastDataType == JT1078DataType.视频I帧)
+                {
+                    //cts
+                    flvTags.VideoTagsData.VideoData.CompositionTime = nALU.LastIFrameInterval;
+                }
+                else
+                {
+                    //cts
+                    flvTags.VideoTagsData.VideoData.CompositionTime = nALU.LastFrameInterval;
+                }
+                flvTags.VideoTagsData.VideoData.MultiData = new List<byte[]>();
+                flvTags.VideoTagsData.VideoData.MultiData.Add(nALU.RawData);
+                //忽略sei
+                //if (sei != null && sei.RawData != null && sei.RawData.Length > 0)
+                //{
+                //    flvTags.VideoTagsData.VideoData.MultiData.Add(sei.RawData);
+                //}
+                flvMessagePackWriter.WriteFlvTag(flvTags);
+                return flvMessagePackWriter.FlushAndGetArray();
+            }
+            finally
+            {
+                FlvArrayPool.Return(buffer);
+            }
+        }
+        internal (byte[] Buffer, uint PreviousTagSize) CreateFirstFlvKeyFrame(byte[] spsRawData, byte[] ppsRawData, SPSInfo spsInfo, uint previousTagSize = 0)
+        {
+            byte[] buffer = FlvArrayPool.Rent(65535);
+            try
+            {
+                FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
+                //flv body PreviousTagSize awalys 0
+                flvMessagePackWriter.WriteUInt32(previousTagSize);
+                //flv body script tag
+                var scriptTagFrameBuffer = CreateScriptTagFrame(spsInfo.width, spsInfo.height);
+                flvMessagePackWriter.WriteArray(scriptTagFrameBuffer);
+                //flv script tag PreviousTagSize
+                flvMessagePackWriter.WriteUInt32((uint)scriptTagFrameBuffer.Length);
+                //flv body video tag 0
+                var videoTagFrame0Buffer = CreateVideoTag0Frame(spsRawData, ppsRawData, spsInfo);
+                flvMessagePackWriter.WriteArray(videoTagFrame0Buffer);
+                uint videoTag0PreviousTagSize = (uint)videoTagFrame0Buffer.Length;
+                return (flvMessagePackWriter.FlushAndGetArray(), videoTag0PreviousTagSize);
+            }
+            finally
+            {
+                FlvArrayPool.Return(buffer);
+            }
+        }
     }
 
     internal class FlvFrameInfo
@@ -456,6 +419,6 @@ namespace JT1078.Flv
         public uint PreviousTagSize { get; set; }
         public ulong Timestamp { get; set; }
         public uint Interval { get; set; }
-        public JT1078DataType DataType { get; set; }
+        public JT1078DataType LastDataType { get; set; }
     }
 }
diff --git a/src/JT1078.Flv/JT1078.Flv.csproj b/src/JT1078.Flv/JT1078.Flv.csproj
index 0d3ae5f..8201170 100644
--- a/src/JT1078.Flv/JT1078.Flv.csproj
+++ b/src/JT1078.Flv/JT1078.Flv.csproj
@@ -14,7 +14,7 @@
     <licenseUrl>https://github.com/SmallChi/JT1078/blob/master/LICENSE</licenseUrl>
     <license>https://github.com/SmallChi/JT1078/blob/master/LICENSE</license>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
-    <Version>1.0.0-preview2</Version>
+    <Version>1.0.0-preview3</Version>
     <SignAssembly>false</SignAssembly>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
diff --git a/src/JT1078.Flv/JT1078.Flv.xml b/src/JT1078.Flv/JT1078.Flv.xml
index 5ebe50b..d340b69 100644
--- a/src/JT1078.Flv/JT1078.Flv.xml
+++ b/src/JT1078.Flv/JT1078.Flv.xml
@@ -53,11 +53,21 @@
             Flv固定头部数据
             </summary>
         </member>
-        <member name="M:JT1078.Flv.FlvEncoder.CreateFlvFrame(JT1078.Protocol.JT1078Package,System.Int32)">
+        <member name="M:JT1078.Flv.FlvEncoder.CreateFlvFrame(System.Collections.Generic.List{JT1078.Flv.H264.H264NALU},System.String,System.Int32)">
+            <summary>
+            
+            </summary>
+            <param name="nALUs"></param>
+            <param name="key">由于获取的SIM卡可能为000000000000,所以如果有替换JT1078Package.GetKey()的值</param>
+            <param name="minimumLength"></param>
+            <returns></returns>
+        </member>
+        <member name="M:JT1078.Flv.FlvEncoder.CreateFlvFrame(JT1078.Protocol.JT1078Package,System.String,System.Int32)">
             <summary>
             
             </summary>
             <param name="package">完整的1078包</param>
+            <param name="key">由于获取的SIM卡可能为000000000000,所以如果有替换JT1078Package.GetKey()的值</param>
             <param name="minimumLength">默认65535</param>
             <returns></returns>
         </member>
@@ -97,12 +107,13 @@
             根据tag类型
             </summary>
         </member>
-        <member name="M:JT1078.Flv.H264.H264Decoder.ParseNALU(JT1078.Protocol.JT1078Package)">
+        <member name="M:JT1078.Flv.H264.H264Decoder.ParseNALU(JT1078.Protocol.JT1078Package,System.String)">
             <summary>
             
             <see cref="!:https://github.com/samirkumardas/jmuxer/blob/master/src/parsers/h264.js"/>
             </summary>
             <param name="package"></param>
+            <param name="key"></param>
             <returns></returns>
         </member>
         <member name="M:JT1078.Flv.H264.H264Decoder.DiscardEmulationPreventionBytes(System.ReadOnlySpan{System.Byte})">