diff --git a/build_test.sh b/build_test.sh
new file mode 100755
index 0000000..f613368
--- /dev/null
+++ b/build_test.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+./build.sh
+export LD_LIBRARY_PATH=`pwd`/lib
+cd build
+./hkstreamer --cmd playback --device 192.168.12.100 --channel 3 -U admin -P Admin123 -S 2023-04-06T00:00:00Z -E 2023-04-06T00:10:00Z >t.ts
\ No newline at end of file
diff --git a/src/HkStreamer.cpp b/src/HkStreamer.cpp
index 6031c3a..c191d1b 100644
--- a/src/HkStreamer.cpp
+++ b/src/HkStreamer.cpp
@@ -13,7 +13,7 @@ using namespace std;
 long playHandle = -1;
 bool is_playback = false;
 long lUserID;
-const int outcache_size=1024;
+const int outcache_size=10240;
 
 void signalexit(int signal){
     if(playHandle!= -1){
@@ -35,22 +35,12 @@ void exitHandler(){
 
 template<typename T>
 void CALLBACK fPlayDataCallBack(LONG lPlayHandle, DWORD dwDataType, BYTE *pBuffer, DWORD dwBufSize, T dwUser){
-    DWORD remained = dwBufSize;
-    char cache[outcache_size]={0};
-    BYTE *cp; // cp head point
-    cp = pBuffer;
-    while(remained>0){
-        int cplen = outcache_size;
-        if(remained<cplen){
-            cplen=remained;
-        }
-        memcpy(cache, cp, cplen);
-        cout.write(cache, outcache_size);
-        if(cplen<remained){
-            cp+=cplen;
-        }
-       remained-=cplen;
+    if(dwDataType == NET_DVR_SYSHEAD){
+        return;
     }
+    char* p= (char*)pBuffer;
+    cout.write(p, dwBufSize);
+    cerr<<"recv:"<<dwBufSize<<endl;
     cout.flush();
 
 }
@@ -78,6 +68,7 @@ int login(LPLoginInfo loginInfo)
   memcpy(struLoginInfo.sPassword, loginInfo->sPassword.c_str(), NAME_LEN);
   std::cerr << struLoginInfo.sDeviceAddress << " " << struLoginInfo.sUserName << " " << struLoginInfo.sPassword << std::endl;
   lUserID = NET_DVR_Login_V40(&struLoginInfo, &struDeviceInfoV40);
+  cerr<<"UserID:"<<lUserID<<endl;
   return lUserID;
 }
 
@@ -126,7 +117,8 @@ int getCfg(LPLoginInfo loginInfo)
 int _playback(long lUserID, int timezone,LPStream stream) {
     NET_DVR_VOD_PARA struVodPara = {0};
   convert_isotimestr_time(stream->start,timezone, &(struVodPara.struBeginTime));
-  convert_isotimestr_time(stream->start,timezone, &(struVodPara.struEndTime));
+  convert_isotimestr_time(stream->end,timezone, &(struVodPara.struEndTime));
+
   struVodPara.struIDInfo.dwChannel = stream->lChannel;
    playHandle = NET_DVR_PlayBackByTime_V40(lUserID, &struVodPara);
   if(checkResult(playHandle<0,"play back error")){
@@ -186,7 +178,7 @@ void _installExitHandler(){
 int playback(LPLoginInfo loginInfo, LPStream stream)
 {
   lUserID = login(loginInfo);
-  if(checkResult(lUserID<1, "device login error")){
+  if(checkResult(lUserID<0, "device login error")){
     return HPR_ERROR;
   }
   // TODO: find timezone cfg
@@ -207,7 +199,8 @@ int _getStream(long lUserID,LPStream stream){
   NET_DVR_PREVIEWINFO struPlayInfo = {0};
    struPlayInfo.hPlayWnd     = 0;
   struPlayInfo.lChannel     = stream->lChannel;  //channel NO
-  struPlayInfo.dwLinkMode   = 1; // 采用子码流
+   struPlayInfo.dwStreamType = 1;// 采用子码流
+  struPlayInfo.dwLinkMode   = 0;
   struPlayInfo.bBlocked = 1;
   struPlayInfo.dwDisplayBufNum = 1;
   playHandle = NET_DVR_RealPlay_V40(lUserID, &struPlayInfo, NULL, NULL);
@@ -215,7 +208,7 @@ int _getStream(long lUserID,LPStream stream){
     return HPR_ERROR;
   }
   int scRet;
-  scRet = NET_DVR_SetStandardDataCallBack(playHandle,fPlayDataCallBack<DWORD>,0);
+  scRet = NET_DVR_SetRealDataCallBack(playHandle,fPlayDataCallBack<DWORD>,0);
   if(checkResult(scRet<0,"set play callback error")){
     return HPR_ERROR;
   }
@@ -226,7 +219,7 @@ int _getStream(long lUserID,LPStream stream){
 int play(LPLoginInfo loginInfo, LPStream stream)
 {
   lUserID = login(loginInfo);
-  if(checkResult(lUserID<1, "device login error")){
+  if(checkResult(lUserID<0, "device login error")){
     return HPR_ERROR;
   }
   int fChannelInfo = _readChannelConfig(lUserID, stream);
@@ -234,5 +227,13 @@ int play(LPLoginInfo loginInfo, LPStream stream)
     return fChannelInfo;
   }
 
-  return _getStream(lUserID, stream);
+  int ret = _getStream(lUserID, stream);
+  if(ret != 0){
+    cerr<<"Get stream error"<<endl;
+    return HPR_ERROR;
+  }
+  while(true){
+    sleep(10);
+  }
+  return HPR_OK;
 }
diff --git a/src/convert.cpp b/src/convert.cpp
index e801aa6..4b7aefb 100644
--- a/src/convert.cpp
+++ b/src/convert.cpp
@@ -3,6 +3,7 @@
 #include <cstring>
 #include "../include/HCNetSDK.h"
 #include "time.h"
+#include <iostream>
 using namespace std;
 
 void convert_str_chararr(string src, char *dst, int dstlen)
@@ -17,6 +18,17 @@ void convert_str_chararr(string src, char *dst, int dstlen)
     strncpy(dst, src.c_str(), cplen);
 }
 
+void outtm(string msg, struct tm t){
+    cerr<<msg<<":";
+    cerr<<t.tm_year <<endl;
+    cerr<<t.tm_mon <<endl;
+    cerr<<t.tm_mday <<endl;
+    cerr<<t.tm_hour <<endl;
+    cerr<<t.tm_min <<endl;
+    cerr<<t.tm_sec <<endl;
+    cerr<<t.tm_gmtoff <<endl;
+    cerr<<t.tm_zone<<endl;
+}
 
 void convert_isotimestr_time(string timestr, int timezone, LPNET_DVR_TIME time)
 {
@@ -32,4 +44,10 @@ void convert_isotimestr_time(string timestr, int timezone, LPNET_DVR_TIME time)
     time->dwHour = ltime.tm_hour;
     time->dwMinute = ltime.tm_min;
     time->dwSecond = ltime.tm_sec;
+    if(ts<1680768000){
+        outtm("iso", t);
+        cerr<<"Ts:"<<ts<<endl;
+        outtm("local", ltime);
+    }
+
 }