diff --git a/src/JT1078.FMp4/Boxs/FragmentBox.cs b/src/JT1078.FMp4/Boxs/FragmentBox.cs
index d3c512a..9f7b6c4 100644
--- a/src/JT1078.FMp4/Boxs/FragmentBox.cs
+++ b/src/JT1078.FMp4/Boxs/FragmentBox.cs
@@ -1,12 +1,32 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class FragmentBox
+    public class FragmentBox:IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// moof
+        /// </summary>
         public MovieFragmentBox MovieFragmentBox { get; set; }
+        /// <summary>
+        /// mdat
+        /// </summary>
         public MediaDataBox MediaDataBox { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            if (MovieFragmentBox != null)
+            {
+                MovieFragmentBox.ToBuffer(ref writer);
+            }
+            if (MediaDataBox != null)
+            {
+                MediaDataBox.ToBuffer(ref writer);
+            }
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/MediaDataBox.cs b/src/JT1078.FMp4/Boxs/MediaDataBox.cs
index 90f94c3..0ca9162 100644
--- a/src/JT1078.FMp4/Boxs/MediaDataBox.cs
+++ b/src/JT1078.FMp4/Boxs/MediaDataBox.cs
@@ -1,15 +1,33 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class MediaDataBox : Mp4Box
+    /// <summary>
+    /// mdat
+    /// </summary>
+    public class MediaDataBox : Mp4Box, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// mdat
+        /// </summary>
         public MediaDataBox() : base("mdat")
         {
         }
 
         public byte[] Data { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            if (Data != null && Data.Length > 0)
+            {
+                writer.WriteArray(Data);
+            }
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/MovieFragmentBox.cs b/src/JT1078.FMp4/Boxs/MovieFragmentBox.cs
index 7f26a58..ae7708c 100644
--- a/src/JT1078.FMp4/Boxs/MovieFragmentBox.cs
+++ b/src/JT1078.FMp4/Boxs/MovieFragmentBox.cs
@@ -1,16 +1,43 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class MovieFragmentBox : Mp4Box
+    /// <summary>
+    /// moof
+    /// </summary>
+    public class MovieFragmentBox : Mp4Box, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// moof
+        /// </summary>
         public MovieFragmentBox() : base("moof")
         {
         }
-
+        /// <summary>
+        /// mfhd
+        /// </summary>
         public MovieFragmentHeaderBox MovieFragmentHeaderBox { get; set; }
+        /// <summary>
+        /// traf
+        /// </summary>
         public TrackFragmentBox TrackFragmentBox { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            if (MovieFragmentHeaderBox != null)
+            {
+                MovieFragmentHeaderBox.ToBuffer(ref writer);
+            }        
+            if (TrackFragmentBox != null)
+            {
+                TrackFragmentBox.ToBuffer(ref writer);
+            }
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/MovieFragmentHeaderBox.cs b/src/JT1078.FMp4/Boxs/MovieFragmentHeaderBox.cs
index 960a087..05932eb 100644
--- a/src/JT1078.FMp4/Boxs/MovieFragmentHeaderBox.cs
+++ b/src/JT1078.FMp4/Boxs/MovieFragmentHeaderBox.cs
@@ -1,15 +1,33 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class MovieFragmentHeaderBox : FullBox
+    /// <summary>
+    /// mfhd
+    /// </summary>
+    public class MovieFragmentHeaderBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// mfhd
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public MovieFragmentHeaderBox(byte version=0, uint flags=0) : base("mfhd", version, flags)
         {
         }
 
         public uint SequenceNumber { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+            writer.WriteUInt32(SequenceNumber);
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessBox.cs b/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessBox.cs
index a6e7a69..65dd2b1 100644
--- a/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessBox.cs
+++ b/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessBox.cs
@@ -1,17 +1,43 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class MovieFragmentRandomAccessBox : Mp4Box
+    /// <summary>
+    /// mfra
+    /// </summary>
+    public class MovieFragmentRandomAccessBox : Mp4Box, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// mfra
+        /// </summary>
         public MovieFragmentRandomAccessBox() : base("mfra")
         {
         }
-
+        /// <summary>
+        /// tfra
+        /// </summary>
         public TrackFragmentRandomAccessBox TrackFragmentRandomAccessBox { get; set; }
-
+        /// <summary>
+        /// mfro
+        /// </summary>
         public MovieFragmentRandomAccessOffsetBox MovieFragmentRandomAccessOffsetBox { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            if (TrackFragmentRandomAccessBox != null)
+            {
+                TrackFragmentRandomAccessBox.ToBuffer(ref writer);
+            } 
+            if (MovieFragmentRandomAccessOffsetBox != null)
+            {
+                MovieFragmentRandomAccessOffsetBox.ToBuffer(ref writer);
+            }
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessOffsetBox.cs b/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessOffsetBox.cs
index c100c7e..28da638 100644
--- a/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessOffsetBox.cs
+++ b/src/JT1078.FMp4/Boxs/MovieFragmentRandomAccessOffsetBox.cs
@@ -1,15 +1,33 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class MovieFragmentRandomAccessOffsetBox : FullBox
+    /// <summary>
+    /// mfro
+    /// </summary>
+    public class MovieFragmentRandomAccessOffsetBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// mfro
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public MovieFragmentRandomAccessOffsetBox(byte version, uint flags=0) : base("mfro", version, flags)
         {
         }
 
         public uint MfraSize { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+            writer.WriteUInt32(MfraSize);
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/SampleDependencyTypeBox.cs b/src/JT1078.FMp4/Boxs/SampleDependencyTypeBox.cs
index 41ded80..5b67d2b 100644
--- a/src/JT1078.FMp4/Boxs/SampleDependencyTypeBox.cs
+++ b/src/JT1078.FMp4/Boxs/SampleDependencyTypeBox.cs
@@ -1,11 +1,21 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class SampleDependencyTypeBox : FullBox
+    /// <summary>
+    /// sdtp
+    /// </summary>
+    public class SampleDependencyTypeBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// sdtp
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public SampleDependencyTypeBox(byte version=0, uint flags=0) : base("sdtp", version, flags)
         {
         }
@@ -14,6 +24,27 @@ namespace JT1078.FMp4
         /// </summary>
         public List<SampleDependencyType> SampleDependencyTypes { get; set; }
 
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+            if(SampleDependencyTypes!=null && SampleDependencyTypes.Count > 0)
+            {
+                //todo: wait ref doc
+                foreach(var item in SampleDependencyTypes)
+                {
+                    writer.WriteByte(item.IsLeading);
+                    writer.WriteByte(item.SampleDependsOn);
+                    writer.WriteByte(item.SampleIsDependedOn);
+                    writer.WriteByte(item.SampleHasRedundancy);
+                    writer.WriteByte(item.DegradPrio);
+                    writer.WriteByte(item.IsNonSync);
+                    writer.WriteByte(item.PaddingValue);
+                }
+            }
+            End(ref writer);
+        }
+
         public class SampleDependencyType
         {
             public byte IsLeading { get; set; }
diff --git a/src/JT1078.FMp4/Boxs/SampleToGroupBox.cs b/src/JT1078.FMp4/Boxs/SampleToGroupBox.cs
index 3329de3..2f47f72 100644
--- a/src/JT1078.FMp4/Boxs/SampleToGroupBox.cs
+++ b/src/JT1078.FMp4/Boxs/SampleToGroupBox.cs
@@ -1,11 +1,21 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class SampleToGroupBox : FullBox
+    /// <summary>
+    /// sbgp
+    /// </summary>
+    public class SampleToGroupBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// sbgp
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public SampleToGroupBox(byte version, uint flags) : base("sbgp", version, flags)
         {
         }
@@ -20,6 +30,11 @@ namespace JT1078.FMp4
 
         public List<SampleToGroupInfo> SampleToGroupInfos { get; set; }
 
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            //todo:sbgp
+        }
+
         public class SampleToGroupInfo
         {
             public uint SampleCount { get; set; }
diff --git a/src/JT1078.FMp4/Boxs/SubSampleInformationBox.cs b/src/JT1078.FMp4/Boxs/SubSampleInformationBox.cs
index 55bbdc8..942b1f4 100644
--- a/src/JT1078.FMp4/Boxs/SubSampleInformationBox.cs
+++ b/src/JT1078.FMp4/Boxs/SubSampleInformationBox.cs
@@ -1,11 +1,21 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class SubSampleInformationBox : FullBox
+    /// <summary>
+    /// subs
+    /// </summary>
+    public class SubSampleInformationBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// subs
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public SubSampleInformationBox(byte version, uint flags=0) : base("subs", version, flags)
         {
         }
@@ -14,6 +24,11 @@ namespace JT1078.FMp4
 
         public List<SubSampleInformation> SubSampleInformations { get; set; }
 
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            //todo:subs
+        }
+
         public class SubSampleInformation
         {
             public uint SampleDelta { get; set; }
diff --git a/src/JT1078.FMp4/Boxs/TrackFragmentBaseMediaDecodeTimeBox.cs b/src/JT1078.FMp4/Boxs/TrackFragmentBaseMediaDecodeTimeBox.cs
index 9aa2fe4..e261a81 100644
--- a/src/JT1078.FMp4/Boxs/TrackFragmentBaseMediaDecodeTimeBox.cs
+++ b/src/JT1078.FMp4/Boxs/TrackFragmentBaseMediaDecodeTimeBox.cs
@@ -1,14 +1,32 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class TrackFragmentBaseMediaDecodeTimeBox : FullBox
+    /// <summary>
+    /// tfdt
+    /// </summary>
+    public class TrackFragmentBaseMediaDecodeTimeBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// tfdt
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public TrackFragmentBaseMediaDecodeTimeBox(byte version, uint flags=0) : base("tfdt", version, flags)
         {
         }
         public uint BaseMediaDecodeTime { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+            writer.WriteUInt32(BaseMediaDecodeTime);
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/TrackFragmentBox.cs b/src/JT1078.FMp4/Boxs/TrackFragmentBox.cs
index a6612d9..fa1aa2a 100644
--- a/src/JT1078.FMp4/Boxs/TrackFragmentBox.cs
+++ b/src/JT1078.FMp4/Boxs/TrackFragmentBox.cs
@@ -1,19 +1,75 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class TrackFragmentBox : Mp4Box
+    /// <summary>
+    /// traf
+    /// </summary>
+    public class TrackFragmentBox : Mp4Box, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// traf
+        /// </summary>
         public TrackFragmentBox() : base("traf")
         {
         }
+        /// <summary>
+        /// tfhd
+        /// </summary>
         public TrackFragmentHeaderBox TrackFragmentHeaderBox { get; set; }
+        /// <summary>
+        /// sdtp
+        /// </summary>
         public SampleDependencyTypeBox SampleDependencyTypeBox { get; set; }
+        /// <summary>
+        /// trun
+        /// </summary>
         public TrackRunBox TrackRunBox { get; set; }
+        /// <summary>
+        /// tfdt
+        /// </summary>
         public TrackFragmentBaseMediaDecodeTimeBox TrackFragmentBaseMediaDecodeTimeBox { get; set; }
+        /// <summary>
+        /// sbgp
+        /// </summary>
         public SampleToGroupBox SampleToGroupBox { get; set; }
+        /// <summary>
+        /// subs
+        /// </summary>
         public SubSampleInformationBox SubSampleInformationBox { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            if (TrackFragmentHeaderBox != null)
+            {
+                TrackFragmentHeaderBox.ToBuffer(ref writer);
+            }
+            if (SampleDependencyTypeBox != null)
+            {
+                SampleDependencyTypeBox.ToBuffer(ref writer);
+            }
+            if (TrackRunBox != null)
+            {
+                TrackRunBox.ToBuffer(ref writer);
+            }        
+            if (TrackFragmentBaseMediaDecodeTimeBox != null)
+            {
+                TrackFragmentBaseMediaDecodeTimeBox.ToBuffer(ref writer);
+            }
+            if (SampleToGroupBox != null)
+            {
+                SampleToGroupBox.ToBuffer(ref writer);
+            }        
+            if (SubSampleInformationBox != null)
+            {
+                SubSampleInformationBox.ToBuffer(ref writer);
+            }
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/TrackFragmentHeaderBox.cs b/src/JT1078.FMp4/Boxs/TrackFragmentHeaderBox.cs
index 69b2ca7..091906e 100644
--- a/src/JT1078.FMp4/Boxs/TrackFragmentHeaderBox.cs
+++ b/src/JT1078.FMp4/Boxs/TrackFragmentHeaderBox.cs
@@ -1,14 +1,28 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class TrackFragmentHeaderBox : FullBox
+    /// <summary>
+    /// tfhd
+    /// </summary>
+    public class TrackFragmentHeaderBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// tfhd
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public TrackFragmentHeaderBox(byte version, uint flags) : base("tfhd", version, flags)
         {
         }
+        /// <summary>
+        /// tfhd
+        /// </summary>
+        /// <param name="flags"></param>
         public TrackFragmentHeaderBox(uint flags) : this(0, flags)
         {
         }
@@ -20,7 +34,15 @@ namespace JT1078.FMp4
         public uint SampleDescriptionIndex { get; set; }
         public uint DefaultSampleDuration { get; set; }
         public uint DefaultSampleSize { get; set; }
-        public uint DefaultSampleFlags { get; set; } 
+        public uint DefaultSampleFlags { get; set; }
         #endregion
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+            writer.WriteUInt32(TrackID);
+            //todo:all the following are optional fields
+            End(ref writer);
+        }
     }
 }
diff --git a/src/JT1078.FMp4/Boxs/TrackFragmentRandomAccessBox.cs b/src/JT1078.FMp4/Boxs/TrackFragmentRandomAccessBox.cs
index c0a6b5d..8a3ba3c 100644
--- a/src/JT1078.FMp4/Boxs/TrackFragmentRandomAccessBox.cs
+++ b/src/JT1078.FMp4/Boxs/TrackFragmentRandomAccessBox.cs
@@ -1,11 +1,21 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class TrackFragmentRandomAccessBox : FullBox
+    /// <summary>
+    /// tfra
+    /// </summary>
+    public class TrackFragmentRandomAccessBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// tfra
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public TrackFragmentRandomAccessBox(byte version, uint flags=0) : base("tfra", version, flags)
         {
         }
@@ -28,6 +38,16 @@ namespace JT1078.FMp4
         public uint LengthSizeOfSampleNum { get; set; }
         public uint NumberOfEntry { get; set; }
         public List<TrackFragmentRandomAccessInfo> TrackFragmentRandomAccessInfos { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+
+            //todo:tfra
+            End(ref writer);
+        }
+
         public class TrackFragmentRandomAccessInfo
         {
             public ulong Time { get; set; }
diff --git a/src/JT1078.FMp4/Boxs/TrackRunBox.cs b/src/JT1078.FMp4/Boxs/TrackRunBox.cs
index 1cc0cdc..0947a76 100644
--- a/src/JT1078.FMp4/Boxs/TrackRunBox.cs
+++ b/src/JT1078.FMp4/Boxs/TrackRunBox.cs
@@ -1,11 +1,21 @@
-using System;
+using JT1078.FMp4.Interfaces;
+using JT1078.FMp4.MessagePack;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace JT1078.FMp4
 {
-    public class TrackRunBox : FullBox
+    /// <summary>
+    /// trun
+    /// </summary>
+    public class TrackRunBox : FullBox, IFMp4MessagePackFormatter
     {
+        /// <summary>
+        /// trun
+        /// </summary>
+        /// <param name="version"></param>
+        /// <param name="flags"></param>
         public TrackRunBox(byte version, uint flags) : base("trun", version, flags)
         {
         }
@@ -20,6 +30,15 @@ namespace JT1078.FMp4
         /// length:SampleCount
         /// </summary>
         public List<TrackRunInfo> TrackRunInfos { get; set; }
+
+        public void ToBuffer(ref FMp4MessagePackWriter writer)
+        {
+            Start(ref writer);
+            WriterFullBoxToBuffer(ref writer);
+            //todo: TrackRunBox
+            End(ref writer);
+        }
+
         public class TrackRunInfo
         {
             public uint SampleDuration { get; set; }
diff --git a/src/JT1078.FMp4/FMp4Box.cs b/src/JT1078.FMp4/FMp4Box.cs
index 32be246..1de854f 100644
--- a/src/JT1078.FMp4/FMp4Box.cs
+++ b/src/JT1078.FMp4/FMp4Box.cs
@@ -20,17 +20,27 @@ namespace JT1078.FMp4
         /// </summary>
         public MovieBox MovieBox { get; set; }
         /// <summary>
-        /// 
+        /// fboxs
         /// </summary>
         public List<FragmentBox> FragmentBoxs { get; set; }
         /// <summary>
-        /// 
+        /// mfra
         /// </summary>
         public MovieFragmentRandomAccessBox MovieFragmentRandomAccessBox { get; set; }
 
         public void ToBuffer(ref FMp4MessagePackWriter writer)
         {
             FileTypeBox.ToBuffer(ref writer);
+            MovieBox.ToBuffer(ref writer);
+            if(FragmentBoxs!=null && FragmentBoxs.Count > 0)
+            {
+                foreach(var item in FragmentBoxs)
+                {
+                    item.MovieFragmentBox.ToBuffer(ref writer);
+                    item.MediaDataBox.ToBuffer(ref writer);
+                }
+            }
+
         }
     }
 }
diff --git a/src/JT1078.FMp4/JT1078.FMp4.xml b/src/JT1078.FMp4/JT1078.FMp4.xml
index bb40784..ce55626 100644
--- a/src/JT1078.FMp4/JT1078.FMp4.xml
+++ b/src/JT1078.FMp4/JT1078.FMp4.xml
@@ -24,6 +24,18 @@
             length:EntryCount
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.ChunkOffsetBox">
+            <summary>
+            stco
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.ChunkOffsetBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            stco
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.ChunkOffsetBox.ChunkOffset">
             <summary>
             length:EntryCount
@@ -50,6 +62,18 @@
             DepOn:field_size=>DataType
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.CompositionOffsetBox">
+            <summary>
+            ctts
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.CompositionOffsetBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            ctts
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.CompositionOffsetBox.CompositionOffsetInfo.SignedSampleOffset">
             <summary>
             version == 1
@@ -151,6 +175,16 @@
             4位*n
             </summary>
         </member>
+        <member name="P:JT1078.FMp4.FragmentBox.MovieFragmentBox">
+            <summary>
+            moof
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.FragmentBox.MediaDataBox">
+            <summary>
+            mdat
+            </summary>
+        </member>
         <member name="P:JT1078.FMp4.FreeSpaceBox.FillValue">
             <summary>
             填充值
@@ -254,6 +288,16 @@
             minf
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.MediaDataBox">
+            <summary>
+            mdat
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.MediaDataBox.#ctor">
+            <summary>
+            mdat
+            </summary>
+        </member>
         <member name="T:JT1078.FMp4.MediaHeaderBox">
             <summary>
             mdhd
@@ -315,7 +359,7 @@
         </member>
         <member name="P:JT1078.FMp4.MovieBox.MovieExtendsBox">
             <summary>
-            trak
+            mvex
             </summary>
         </member>
         <member name="T:JT1078.FMp4.MovieExtendsBox">
@@ -328,6 +372,82 @@
             mvex
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.MovieExtendsHeaderBox">
+            <summary>
+            mehd
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.MovieExtendsHeaderBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            mehd
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
+        <member name="T:JT1078.FMp4.MovieFragmentBox">
+            <summary>
+            moof
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.MovieFragmentBox.#ctor">
+            <summary>
+            moof
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.MovieFragmentBox.MovieFragmentHeaderBox">
+            <summary>
+            mfhd
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.MovieFragmentBox.TrackFragmentBox">
+            <summary>
+            traf
+            </summary>
+        </member>
+        <member name="T:JT1078.FMp4.MovieFragmentHeaderBox">
+            <summary>
+            mfhd
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.MovieFragmentHeaderBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            mfhd
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
+        <member name="T:JT1078.FMp4.MovieFragmentRandomAccessBox">
+            <summary>
+            mfra
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.MovieFragmentRandomAccessBox.#ctor">
+            <summary>
+            mfra
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.MovieFragmentRandomAccessBox.TrackFragmentRandomAccessBox">
+            <summary>
+            tfra
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.MovieFragmentRandomAccessBox.MovieFragmentRandomAccessOffsetBox">
+            <summary>
+            mfro
+            </summary>
+        </member>
+        <member name="T:JT1078.FMp4.MovieFragmentRandomAccessOffsetBox">
+            <summary>
+            mfro
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.MovieFragmentRandomAccessOffsetBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            mfro
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="T:JT1078.FMp4.MovieHeaderBox">
             <summary>
             mvhd
@@ -385,6 +505,18 @@
              length:sample_count
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.SampleDependencyTypeBox">
+            <summary>
+            sdtp
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.SampleDependencyTypeBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            sdtp
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.SampleDependencyTypeBox.SampleDependencyTypes">
             <summary>
             is taken from the sample_count in the Sample Size Box ('stsz') or Compact Sample Size Box(‘stz2’).
@@ -449,6 +581,30 @@
             stco
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.SampleToChunkBox">
+            <summary>
+            stsc
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.SampleToChunkBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            stsc
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
+        <member name="T:JT1078.FMp4.SampleToGroupBox">
+            <summary>
+            sbgp
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.SampleToGroupBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            sbgp
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.SampleToGroupBox.GroupingTypeParameter">
             <summary>
             version == 1
@@ -510,6 +666,18 @@
             length:Length
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.SubSampleInformationBox">
+            <summary>
+            subs
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.SubSampleInformationBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            subs
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.SubSampleInformationBox.SubSampleInformation.InnerSubSampleInformation.SubsampleSizeLarge">
             <summary>
             version == 1
@@ -540,6 +708,18 @@
             length:ItemCount
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.TimeToSampleBox">
+            <summary>
+            stts
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.TimeToSampleBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            stts
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="T:JT1078.FMp4.TrackBox">
             <summary>
             trak
@@ -560,6 +740,88 @@
             mdia
             </summary>
         </member>
+        <member name="T:JT1078.FMp4.TrackFragmentBaseMediaDecodeTimeBox">
+            <summary>
+            tfdt
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.TrackFragmentBaseMediaDecodeTimeBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            tfdt
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
+        <member name="T:JT1078.FMp4.TrackFragmentBox">
+            <summary>
+            traf
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.TrackFragmentBox.#ctor">
+            <summary>
+            traf
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.TrackFragmentBox.TrackFragmentHeaderBox">
+            <summary>
+            tfhd
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.TrackFragmentBox.SampleDependencyTypeBox">
+            <summary>
+            sdtp
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.TrackFragmentBox.TrackRunBox">
+            <summary>
+            trun
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.TrackFragmentBox.TrackFragmentBaseMediaDecodeTimeBox">
+            <summary>
+            tfdt
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.TrackFragmentBox.SampleToGroupBox">
+            <summary>
+            sbgp
+            </summary>
+        </member>
+        <member name="P:JT1078.FMp4.TrackFragmentBox.SubSampleInformationBox">
+            <summary>
+            subs
+            </summary>
+        </member>
+        <member name="T:JT1078.FMp4.TrackFragmentHeaderBox">
+            <summary>
+            tfhd
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.TrackFragmentHeaderBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            tfhd
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
+        <member name="M:JT1078.FMp4.TrackFragmentHeaderBox.#ctor(System.UInt32)">
+            <summary>
+            tfhd
+            </summary>
+            <param name="flags"></param>
+        </member>
+        <member name="T:JT1078.FMp4.TrackFragmentRandomAccessBox">
+            <summary>
+            tfra
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.TrackFragmentRandomAccessBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            tfra
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.TrackFragmentRandomAccessBox.Reserved">
             <summary>
             4byte 32-26
@@ -592,6 +854,18 @@
             <param name="version"></param>
             <param name="flags"></param>
         </member>
+        <member name="T:JT1078.FMp4.TrackRunBox">
+            <summary>
+            trun
+            </summary>
+        </member>
+        <member name="M:JT1078.FMp4.TrackRunBox.#ctor(System.Byte,System.UInt32)">
+            <summary>
+            trun
+            </summary>
+            <param name="version"></param>
+            <param name="flags"></param>
+        </member>
         <member name="P:JT1078.FMp4.TrackRunBox.DataOffset">
             <summary>
             可选的
@@ -683,12 +957,12 @@
         </member>
         <member name="P:JT1078.FMp4.FMp4Box.FragmentBoxs">
             <summary>
-            
+            fboxs
             </summary>
         </member>
         <member name="P:JT1078.FMp4.FMp4Box.MovieFragmentRandomAccessBox">
             <summary>
-            
+            mfra
             </summary>
         </member>
         <member name="F:JT1078.FMp4.FMp4Constants.DateLimitYear">