diff --git a/src/JT1078.Flv.Test/FlvMessagePackWriter_Amf3_Test.cs b/src/JT1078.Flv.Test/FlvMessagePackWriter_Amf3_Test.cs
deleted file mode 100644
index 18049e7..0000000
--- a/src/JT1078.Flv.Test/FlvMessagePackWriter_Amf3_Test.cs
+++ /dev/null
@@ -1,43 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using Xunit;
-using JT1078.Flv.MessagePack;
-using JT1078.Flv.Metadata;
-using JT1078.Flv.Extensions;
-
-namespace JT1078.Flv.Test
-{
-
-    public class FlvMessagePackWriter_Amf3_Test
-    {
-        [Fact]
-        public void FlvMessagePackWriter_Amf3_Test_1() {
-            Span<byte> buffer = new byte[1024];
-            FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
-            flvMessagePackWriter.WriteAmf3(new Flv.Metadata.Amf3 { 
-                     Amf3Metadatas=new List<Flv.Metadata.IAmf3Metadata> {
-                         new Amf3Metadata_Duration{
-                          Value=7.22100
-                         },
-                         new Amf3Metadata_FileSize{ 
-                          Value=2005421.00000
-                         }
-                     }
-            });
-
-
-            Amf3Metadata_Duration amf3Metadata = new Amf3Metadata_Duration();
-            amf3Metadata.Value = 7.22100;
-            var hex = amf3Metadata.ToBuffer().ToArray().ToHexString();
-            Assert.Equal("00086475726174696F6E00401CE24DD2F1A9FC", buffer.Slice(5, hex.Length/2).ToArray().ToHexString());
-
-
-            Amf3Metadata_FileSize amf3Metadata_FileSize = new Amf3Metadata_FileSize();
-            amf3Metadata_FileSize.Value = 2005421.00000;
-            var hex1 = amf3Metadata_FileSize.ToBuffer().ToArray().ToHexString();
-            Assert.Equal("000866696C6573697A6500413E99AD00000000", buffer.Slice(hex.Length/2+5, hex1.Length/2).ToArray().ToHexString());
-
-        }
-    }
-}
diff --git a/src/JT1078.Flv.Test/MessagePack/FlvMessagePackWriter_Amf3_Test.cs b/src/JT1078.Flv.Test/MessagePack/FlvMessagePackWriter_Amf3_Test.cs
new file mode 100644
index 0000000..0bb5070
--- /dev/null
+++ b/src/JT1078.Flv.Test/MessagePack/FlvMessagePackWriter_Amf3_Test.cs
@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xunit;
+using JT1078.Flv.MessagePack;
+using JT1078.Flv.Metadata;
+using JT1078.Flv.Extensions;
+
+namespace JT1078.Flv.Test.MessagePack
+{
+
+    public class FlvMessagePackWriter_Amf3_Test
+    {
+        [Fact]
+        public void FlvMessagePackWriter_Amf3_Test_1() {
+            Span<byte> buffer = new byte[1024];
+            FlvMessagePackWriter flvMessagePackWriter = new FlvMessagePackWriter(buffer);
+            flvMessagePackWriter.WriteAmf3(new Flv.Metadata.Amf3 { 
+                     Amf3Metadatas=new List<Flv.Metadata.IAmf3Metadata> {
+                         new Amf3Metadata_Duration{
+                          Value=7.22100
+                         },
+                         new Amf3Metadata_FileSize{ 
+                          Value=2005421.00000
+                         },
+                         new Amf3Metadata_FrameRate{ 
+                         Value=29.16667
+                         },
+                         new Amf3Metadata_Height{ 
+                         Value=960.00000
+                         },
+                         new Amf3Metadata_VideoCodecId{ 
+                         Value=7.00000
+                         },
+                         new Amf3Metadata_VideoDataRate{ 
+                         Value=0.00000
+                         },
+                         new Amf3Metadata_Width{ 
+                         Value=544.00000
+                         }
+                     }
+            });
+
+            buffer = buffer.Slice(5);//amf3 5个字节
+            Amf3Metadata_Duration amf3Metadata = new Amf3Metadata_Duration();
+            amf3Metadata.Value = 7.22100;
+            var hex = amf3Metadata.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("00086475726174696F6E00401CE24DD2F1A9FC", buffer.Slice(0,hex.Length/2).ToArray().ToHexString());
+
+            buffer = buffer.Slice(hex.Length / 2);
+            Amf3Metadata_FileSize amf3Metadata_FileSize = new Amf3Metadata_FileSize();
+            amf3Metadata_FileSize.Value = 2005421.00000;
+            var hex1 = amf3Metadata_FileSize.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("000866696C6573697A6500413E99AD00000000", buffer.Slice(0, hex1.Length/2).ToArray().ToHexString());
+
+            buffer = buffer.Slice(hex1.Length / 2);
+            Amf3Metadata_FrameRate amf3Metadata_FrameRate = new Amf3Metadata_FrameRate();
+            amf3Metadata_FrameRate.Value = 29.16667;
+            var hex2 = amf3Metadata_FrameRate.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("00096672616D657261746500403D2AAAE297396D", buffer.Slice(0, hex2.Length / 2).ToArray().ToHexString());
+
+            buffer = buffer.Slice(hex2.Length / 2);
+            Amf3Metadata_Height amf3Metadata_Height = new Amf3Metadata_Height();
+            amf3Metadata_Height.Value = 960.00000;
+            var hex3 = amf3Metadata_Height.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("000668656967687400408E000000000000", buffer.Slice(0, hex3.Length / 2).ToArray().ToHexString());
+
+            buffer = buffer.Slice(hex3.Length / 2);
+            Amf3Metadata_VideoCodecId amf3Metadata_VideoCodecId = new Amf3Metadata_VideoCodecId();
+            amf3Metadata_VideoCodecId.Value = 7.00000;
+            var hex4 = amf3Metadata_VideoCodecId.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("000C766964656F636F646563696400401C000000000000", buffer.Slice(0, hex4.Length / 2).ToArray().ToHexString());
+
+            buffer = buffer.Slice(hex4.Length / 2);
+            Amf3Metadata_VideoDataRate amf3Metadata_VideoDataRate = new Amf3Metadata_VideoDataRate();
+            amf3Metadata_VideoDataRate.Value = 0.00000;
+            var hex5 = amf3Metadata_VideoDataRate.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("000D766964656F6461746172617465000000000000000000", buffer.Slice(0, hex5.Length / 2).ToArray().ToHexString());
+
+            buffer = buffer.Slice(hex5.Length / 2);
+            Amf3Metadata_Width amf3Metadata_Width = new Amf3Metadata_Width();
+            amf3Metadata_Width.Value = 544.00000;
+            var hex6 = amf3Metadata_Width.ToBuffer().ToArray().ToHexString();
+            Assert.Equal("00057769647468004081000000000000", buffer.Slice(0, hex6.Length / 2).ToArray().ToHexString());
+        }
+    }
+}