大华监控视频dav转换avi的问题，提供dhplay.dll及sdk说明文档，能实现播放但未能实现转换AVI

 private void button3_Click(object sender, EventArgs e)

        {

            if (ofdMain.FileName == "") return;



            bool b1 = DHPlay.PLAY_SetStreamOpenMode_p(0,1);



            bool b2 = DHPlay.PLAY_OpenStream_p(0, IntPtr.Zero, 0, (UInt32)900 * 1024);



            bool b3=DHPlay.PLAY_StartAVIConvert_p(0, ofdMain.FileName.Replace(".dav", ".avi"), AVIConvertCallback2, 0);



            FileStream SourceFile = File.OpenRead(ofdMain.FileName);

            //if (!SourceFile.Open(m_csSourceFile, CFile.modeRead | CFile.shareDenyNone))

            //{

            //    //PLAY_StopAVIConvert(DefineConstantsAVIConvertDlg.AVICONV_PORT);

            //    //PLAY_Stop(DefineConstantsAVIConvertDlg.AVICONV_PORT);

            //    //PLAY_CloseStream(DefineConstantsAVIConvertDlg.AVICONV_PORT);

            //}

            uint dwFileLen = (uint) SourceFile.Length;

            const int BUFLEN = 8 * 1024;

            byte[] InfoBuf = new byte[BUFLEN];

            uint nRead;

            uint dwCurPos = 0;

           bool m_bAVIConvEnable =true;

            while (m_bAVIConvEnable)

            {

                //memset(InfoBuf, 0, InfoBuf.Length);

                //nRead = SourceFile.Read(InfoBuf, BUFLEN);

                nRead = (uint)SourceFile.Read(InfoBuf,0 ,BUFLEN);

                if (nRead <= 0)

                {

                    break;

                }



                dwCurPos += nRead;



                //////////////////

                //byte[] test = new byte[5];

                GCHandle hObject = GCHandle.Alloc(InfoBuf, GCHandleType.Pinned);

                IntPtr pObject = hObject.AddrOfPinnedObject();



                if (hObject.IsAllocated)

                    hObject.Free();

 

                /////////////////

                while (m_bAVIConvEnable && !DHPlay.PLAY_InputData_p(0, InfoBuf, nRead))//阻塞为false

                {

                    Thread.Sleep(5);

                }



                double fpress = (double)dwCurPos / (double)dwFileLen;



                int iProgressPos = (int)(fpress * 1000.0);

                //if (m_bAVIConvEnable)

                //    pProgCtrl->SetPos(iProgressPos);

            }



        }

补充：.NET技术 ,  C#

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