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());
        }