海康sdk接口中fstreamcallback怎麽用

BOOL snapStream(LONG LuserId,LONG lChannel,char filename[256])

{

//FILE *Videofile = NULL;

Videofile = fopen(filename,"wb+");

NET_DVR_CLIENTINFO ClientInfo; // = {0}

memset(&ClientInfo, 0, sizeof(NET_DVR_CLIENTINFO));

//需要SDK解碼時句柄設為有效值，僅取流不解碼時可設為空

ClientInfo.hPlayWnd = NULL;

//預覽通道號

ClientInfo.lChannel = lChannel;

//最高位(31)為0表示主碼流，為1表示子碼流

ClientInfo.lLinkMode = 1;

//多播地址，需要多播預覽時配置

ClientInfo.sMultiCastIP = NULL;

BOOL bPreviewBlock = false;