虽然还是没有搞出来，但总感觉快了哈哈（哪来的自信）
1、RTP协议接受数据
#region 1-RTP协议变量声明 RTPsession session; RTPReceiver receiver; RTPParticipant participant; private Dictionary<uint, List<RTPPacket>> Clients;#endregion #region 对RTP进行初始化,并接收数据,调用之后就可以接收数据了 session = new RTPSession(); receiver = new RTPReceiver(); IPEndPoint rtpEp = new IPEndPoint(IPAddress.Parse("192.168.1.109"), 5000); participant = new RTPParticipant(rtpEp); receiver.AddParticipant(participant); session.NewRTPPacket = new RTPSession.NewRTPPacket_Callback(NewRTPPacket); session.AddReceiver(receiver); Clients = new Dictionary<uint, List<RTPPacket>>();#endregion
其中NewRTPPackt是
public delegate bool NewRTPPacket_Callback( RTPPacket packet)
类型的委托。packet为接收到的RTP包，我们就对这些包进行处理得到想要的帧，然后再把帧进行解码，得到想要的图像（我是这样理解的）
2、H.264进行解码
我从网络上搜索到了一个海思的DLL,可以对H.264进行解码
#region 解码器相关变量声明 /// <summary> /// 数据的句柄 /// </summary> IntPtr pData; /// <summary> /// 这是解码器属性信息 /// </summary> public H264Dec.hiH264_DEC_ATTR_S decAttr; /// <summary> /// 这是解码器输出图像信息 /// </summary> public H264Dec.hiH264_DEC_FRAME_S _decodeFrame = new H264Dec.hiH264_DEC_FRAME_S(); /// <summary> /// 解码器句柄 /// </summary> public IntPtr _decHandle; #endregion #region 解码器相关初始化，一般在窗口load中进行初始化 decAttr = new H264Dec.hiH264_DEC_ATTR_S(); decAttr.uPictureFormat = 0; decAttr.uStreamInType = 0; decAttr.uPicWidthInMB = 480 >> 4; decAttr.uPicHeightInMB = 640 >> 4; decAttr.uBufNum = 8; decAttr.uWorkMode = 16; //创建、初始化解码器句柄 _decHandle = H264Dec.Hi264DecCreate(ref decAttr); //_decodeFrame = new H264Dec.hiH264_DEC_FRAME_S();#endregion//这一写代码就是h264解码的代码，其中未声明的函数和变量会在下面进行声明给出，主要是讲YUV转为RGB，在保存为Bitmap文件if (H264Dec.Hi264DecAU(_decHandle, pData, (uint)newData.Length, 0, ref _decodeFrame, 0) == 0) { if (_decodeFrame.bError == 0) { //策画 y u v 的长度 var yLength = _decodeFrame.uHeight * _decodeFrame.uYStride; var uLength = _decodeFrame.uHeight * _decodeFrame.uUVStride / 2; var vLength = uLength; var yBytes = new byte[yLength]; var uBytes = new byte[uLength]; var vBytes = new byte[vLength]; var decodedBytes = new byte[yLength + uLength + vLength]; //_decodeFrame 是解码后的数据对象,里面包含 YUV 数据、宽度、高度等信息 Marshal.Copy(_decodeFrame.pY, yBytes, 0, (int)yLength); Marshal.Copy(_decodeFrame.pU, uBytes, 0, (int)uLength); Marshal.Copy(_decodeFrame.pV, vBytes, 0, (int)vLength); //将从 _decodeFrame 中取出的 YUV 数据放入 decodedBytes 中 Array.Copy(yBytes, decodedBytes, yLength); Array.Copy(uBytes, 0, decodedBytes, yLength, uLength); Array.Copy(vBytes, 0, decodedBytes, yLength + uLength, vLength); ConvertYUV2RGB(yuv, rgb, width, height); ConvertYUV2RGB(decodedBytes, rgb, width, height); // 写 BMP 文件。 WriteBMP(rgb, width, height, string.Format("E://test//yuv2bmp_{0}.bmp", index++)); } }其中pData为需要的一帧数据，因为pData为Intptr类型，而一帧数据是byte[]类型，所以我从网上查了查怎么转换，下面是代码，newData是byte【】，pData是intptr类型。
GCHandle hObject = GCHandle.Alloc(newData, GCHandleType.Pinned); pData = hObject.AddrOfPinnedObject();
H264解码类
public class H264Dec { public const int HI_SUCCESS = 0; public const int HI_FAILURE = -1; public const int HI_LITTLE_ENDIAN = 1234; public const int HI_BIG_ENDIAN = 4321; public const int HI_DECODER_SLEEP_TIME = 60000; public const int HI_H264DEC_OK = 0; public const int HI_H264DEC_NEED_MORE_BITS = -1; public const int HI_H264DEC_NO_PICTURE = -2; public const int HI_H264DEC_ERR_HANDLE = -3; [DllImport("hi_h264dec_w.dll", EntryPoint = "Hi264DecImageEnhance", CallingConvention = CallingConvention.Cdecl)] public static extern int Hi264DecImageEnhance(IntPtr hDec, ref hiH264_DEC_FRAME_S pDecFrame, uint uEnhanceCoeff); [DllImport("hi_h264dec_w.dll", EntryPoint = "Hi264DecCreate", CallingConvention = CallingConvention.Cdecl)] public static extern IntPtr Hi264DecCreate(ref hiH264_DEC_ATTR_S pDecAttr); [DllImport("hi_h264dec_w.dll", EntryPoint = "Hi264DecDestroy", CallingConvention = CallingConvention.Cdecl)] public static extern void Hi264DecDestroy(IntPtr hDec); [DllImport("hi_h264dec_w.dll", EntryPoint = "Hi264DecGetInfo", CallingConvention = CallingConvention.Cdecl)] public static extern int Hi264DecGetInfo(ref hiH264_LIBINFO_S pLibInfo); /// <summary> /// 对输入的一段码流进行解码并按帧输出图像 /// </summary> /// <param name="hDec">解码器句柄</param> /// <param name="pStream">码流起始地址</param> /// <param name="iStreamLen">码流长度</param> /// <param name="ullPTS">时间戳信息</param> /// <param name="pDecFrame">图像信息</param> /// <param name="uFlags">解码模式 0：正常解码；1、解码完毕并要求解码器输出残留图像</param> /// <returns></returns> [DllImport("hi_h264dec_w.dll", EntryPoint = "Hi264DecFrame", CallingConvention = CallingConvention.Cdecl)] public static extern int Hi264DecFrame(IntPtr hDec, IntPtr pStream, uint iStreamLen, ulong ullPTS, ref hiH264_DEC_FRAME_S pDecFrame, uint uFlags); [DllImport("hi_h264dec_w.dll", EntryPoint = "Hi264DecAU", CallingConvention = CallingConvention.Cdecl)] public static extern int Hi264DecAU(IntPtr hDec, IntPtr pStream, uint iStreamLen, ulong ullPTS, ref hiH264_DEC_FRAME_S pDecFrame, uint uFlags); /// <summary> /// 解码器属性信息。 /// </summary> [StructLayout(LayoutKind.Sequential)] public struct hiH264_DEC_ATTR_S { /// <summary> /// 解码器输出图像格式，目前解码库只支持YUV420图像格式 /// </summary> public uint uPictureFormat; /// <summary> /// 输入码流格式 0x00: 目前解码库只支持以“00 00 01”为nalu分割符的流式H.264码流 /// </summary> public uint uStreamInType; /// <summary> /// 图像宽度 /// </summary> public uint uPicWidthInMB; /// <summary> /// 图像高度 /// </summary> public uint uPicHeightInMB; /// <summary> /// 参考帧数目 /// </summary> public uint uBufNum; /// <summary> /// 解码器工作模式 /// </summary> public uint uWorkMode; /// <summary> /// 用户私有数据 /// </summary> public IntPtr pUserData; /// <summary> /// 保留字 /// </summary> public uint uReserved; } /// <summary> /// 解码器输出图像信息数据结构 /// </summary> [StructLayout(LayoutKind.Sequential)] public struct hiH264_DEC_FRAME_S { /// <summary> /// Y分量地址 /// <
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