Java SDK调用 海康网络摄像头 多摄像头同时预览 并取流
Posted 心zui
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Java SDK调用 海康网络摄像头 多摄像头同时预览 并取流相关的知识,希望对你有一定的参考价值。
写在前面:
最近也遇到了调用海康多个摄像头实现同时预览的需求,不过官方demo里并没详细的案例,上网查了下资料,也找不到对应的解决方案 ,电话咨询海康技术,没接过,信息没回过。这里就不对海康技术支持多作评价了,废话不多说。上方案!
小编首先整理了文档和获取流程(如图)
然后小编根据这个思路将SDK的Demo流程整个看了一遍,终于发现了问题的所在,接下来直接上代码(个人是根据海康提供的demo进行简单的修改,将部分公共代码给抽了出来,另外小编只用到了预览录制和停止录制功能,解码和其他功能小编没用到,所以小编在这里都干掉了。尽量能简洁易懂就简介易懂,大佬勿喷!仅供参考和提供思路!!!!!!)
具体流程如下:
1 初始化设备 并定义一个list集合存储用户句柄
public static List<Integer> lUserIDList = new ArrayList<>();//用户句柄集合
//初始化
private static void init()
//SDK初始化,一个程序只需要调用一次
boolean initSuc = hCNetSDK.NET_DVR_Init();
if (initSuc != true)
System.out.println("初始化失败");
//异常消息回调
if (fExceptionCallBack == null)
fExceptionCallBack = new FExceptionCallBack_Imp();
Pointer pUser = null;
if (!hCNetSDK.NET_DVR_SetExceptionCallBack_V30(0, 0, fExceptionCallBack, pUser))
return;
System.out.println("设置异常消息回调成功");
//启动SDK写日志
hCNetSDK.NET_DVR_SetLogToFile(3, "..\\\\sdkLog\\\\", false);
2 登陆设备(只是演示和提供思路 具体实现请各位大佬根据实际业务)
登陆一台设备就会返回一个用户句柄也可称登陆句柄,后续调用预览是根据用户句柄来区分和管理的。
唯一注意的是,设备登陆后的返回值需要保存!登陆完后创建保存回调函数的音频数据文件
//设备登陆
private static void login()
//存储登陆设备集合
List<Device> list = new ArrayList<>();
Device device = new Device();
device.setIp("192.168.1.11");
device.userName("admin");
device.setPassWord("123456");
Device device1 = new Device();
device1.setIp("192.168.1.12");
device1.userName("admin");
device1.setPassWord("123456");
list.add(device);
list.add(device1);
//登录设备,每一台设备分别登录; 登录句柄是唯一的,可以区分设备
HCNetSDK.NET_DVR_USER_LOGIN_INFO m_strLoginInfo;//设备登录信息
HCNetSDK.NET_DVR_DEVICEINFO_V40 m_strDeviceInfo;//设备信息
for (Device d : list)
m_strLoginInfo = new HCNetSDK.NET_DVR_USER_LOGIN_INFO();//设备登录信息
m_strDeviceInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V40();//设备信息
String m_sDeviceIP = d.getIp();//设备ip地址
m_strLoginInfo.sDeviceAddress = new byte[HCNetSDK.NET_DVR_DEV_ADDRESS_MAX_LEN];
System.arraycopy(m_sDeviceIP.getBytes(), 0, m_strLoginInfo.sDeviceAddress, 0, m_sDeviceIP.length());
String m_sUsername = d.getUserName();//设备用户名
m_strLoginInfo.sUserName = new byte[HCNetSDK.NET_DVR_LOGIN_USERNAME_MAX_LEN];
System.arraycopy(m_sUsername.getBytes(), 0, m_strLoginInfo.sUserName, 0, m_sUsername.length());
String m_sPassword = d.getPassWord();//设备密码
m_strLoginInfo.sPassword = new byte[HCNetSDK.NET_DVR_LOGIN_PASSWD_MAX_LEN];
System.arraycopy(m_sPassword.getBytes(), 0, m_strLoginInfo.sPassword, 0, m_sPassword.length());
m_strLoginInfo.wPort = 8000; //SDK端口
m_strLoginInfo.bUseAsynLogin = false; //是否异步登录:0- 否,1- 是
m_strLoginInfo.write();
lUserID = hCNetSDK.NET_DVR_Login_V40(m_strLoginInfo, m_strDeviceInfo);
//将登陆返回的用户句柄保存!(这里很重要 是原先官网没有的,这里保存句柄是为了预览使用)
lUserIDList.add(lUserID);
if (lUserID==-1)
System.out.println("登录失败,错误码为" + hCNetSDK.NET_DVR_GetLastError());
else
System.out.println("设备登录成功! " + "设备序列号:" + new String(m_strDeviceInfo.struDeviceV30.sSerialNumber).trim());
m_strDeviceInfo.read();
//创建文件
VideoDemo.setFile(lUserID);
3 创建保存回调函数的音频数据文件 同时创建一个map集合 保存对应的文件输出流 键为登陆后返回的用户句柄
//定义流的map集合 键为用户句柄(也就是你登陆返回的句柄)
static Map<Integer, FileOutputStream> outputStreamMap = new HashMap();
public static void setFile(int userId)
file = new File("/Download/" + new Date().getTime() + "(" + userId + ")" + ".mp4"); //保存回调函数的音频数据
if (!file.exists())
try
file.createNewFile();
catch (Exception e)
e.printStackTrace();
// FileOutputStream outputStream=new FileOutputStream(file);
try
outputStreamMap.put(userId, new FileOutputStream(file));
catch (FileNotFoundException e)
e.printStackTrace();
4 线程run中执行预览代码 通过调用NET_DVR_RealPlay_V40实现预览
@Override
public void run()
fRealDataCallBack = null;
if (userId == -1)
System.out.println("请先注册");
return;
HCNetSDK.NET_DVR_PREVIEWINFO strClientInfo = new HCNetSDK.NET_DVR_PREVIEWINFO();
strClientInfo.read();
strClientInfo.hPlayWnd = null; //窗口句柄,从回调取流不显示一般设置为空
strClientInfo.lChannel = iChannelNo; //通道号
strClientInfo.dwStreamType = 0; //0-主码流,1-子码流,2-三码流,3-虚拟码流,以此类推
strClientInfo.dwLinkMode = 0; //连接方式:0- TCP方式,1- UDP方式,2- 多播方式,3- RTP方式,4- RTP/RTSP,5- RTP/HTTP,6- HRUDP(可靠传输) ,7- RTSP/HTTPS,8- NPQ
strClientInfo.bBlocked = 1;
strClientInfo.write();
//回调
if (fRealDataCallBack == null)
fRealDataCallBack = new FRealDataCallBack();
//开启预览
lPlay = hCNetSDK.NET_DVR_RealPlay_V40(userId, strClientInfo, fRealDataCallBack, null);
if (lPlay == -1)
int iErr = hCNetSDK.NET_DVR_GetLastError();
System.out.println("取流失败" + iErr);
return;
System.out.println("取流成功");
5 修改回调函数 这里的回调函数参数都是sdk规定好的 在回调中取出集合中对应的流进行文件输出
static class FRealDataCallBack implements HCNetSDK.FRealDataCallBack_V30
//预览回调
public void invoke(int lRealHandle, int dwDataType, ByteByReference pBuffer, int dwBufSize, Pointer pUser)
// System.out.println(lRealHandle + "码流数据回调" + pBuffer + ", 数据类型: " + dwDataType + ", 数据长度:" + dwBufSize + "puser:" + pUser);
long offset = 0;
ByteBuffer buffers = pBuffer.getPointer().getByteBuffer(offset, dwBufSize);
byte[] bytes = new byte[dwBufSize];
buffers.rewind();
buffers.get(bytes);
try
//根据lRealHandle从map中取出对应的流读取数据
outputStreamMap.get(lRealHandle).write(bytes);
catch (Exception e)
e.printStackTrace();
6 开启线程
public static void main(String[] args) throws InterruptedException
if (hCNetSDK == null && playControl == null)
if (!CreateSDKInstance())
System.out.println("Load SDK fail");
return;
if (!CreatePlayInstance())
System.out.println("Load PlayCtrl fail");
return;
//linux系统建议调用以下接口加载组件库
if (osSelect.isLinux())
HCNetSDK.BYTE_ARRAY ptrByteArray1 = new HCNetSDK.BYTE_ARRAY(256);
HCNetSDK.BYTE_ARRAY ptrByteArray2 = new HCNetSDK.BYTE_ARRAY(256);
//这里是库的绝对路径,请根据实际情况修改,注意改路径必须有访问权限
String strPath1 = System.getProperty("user.dir") + "/lib/libcrypto.so.1.1";
String strPath2 = System.getProperty("user.dir") + "/lib/libssl.so.1.1";
System.arraycopy(strPath1.getBytes(), 0, ptrByteArray1.byValue, 0, strPath1.length());
ptrByteArray1.write();
hCNetSDK.NET_DVR_SetSDKInitCfg(3, ptrByteArray1.getPointer());
System.arraycopy(strPath2.getBytes(), 0, ptrByteArray2.byValue, 0, strPath2.length());
ptrByteArray2.write();
hCNetSDK.NET_DVR_SetSDKInitCfg(4, ptrByteArray2.getPointer());
String strPathCom = System.getProperty("user.dir") + "/lib";
HCNetSDK.NET_DVR_LOCAL_SDK_PATH struComPath = new HCNetSDK.NET_DVR_LOCAL_SDK_PATH();
System.arraycopy(strPathCom.getBytes(), 0, struComPath.sPath, 0, strPathCom.length());
struComPath.write();
hCNetSDK.NET_DVR_SetSDKInitCfg(2, struComPath.getPointer());
//初始化
init();
//登陆
login();
// 创建线程池对象指定线程数量
ExecutorService tp = Executors.newFixedThreadPool(2);
VideoDemo video1=new VideoDemo(lUserIDList.get(0), 1);
VideoDemo video2=new VideoDemo(lUserIDList.get(1),1) ;
tp.submit(video1);
tp.submit(video2);
效果如图:
完整代码:
package com.NetSDKDemo;
import Common.osSelect;
import com.Device;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* @create 2020-12-24-17:55
*/
public class ClinetDemo
static HCNetSDK hCNetSDK = null;
static PlayCtrl playControl = null;
static int lUserID = 0;//用户句柄
public static List<Integer> lUserIDList = new ArrayList<>();//用户句柄
static FExceptionCallBack_Imp fExceptionCallBack;
static class FExceptionCallBack_Imp implements HCNetSDK.FExceptionCallBack
public void invoke(int dwType, int lUserID, int lHandle, Pointer pUser)
System.out.println("异常事件类型:" + dwType);
return;
public static void main(String[] args) throws InterruptedException
if (hCNetSDK == null && playControl == null)
if (!CreateSDKInstance())
System.out.println("Load SDK fail");
return;
if (!CreatePlayInstance())
System.out.println("Load PlayCtrl fail");
return;
//linux系统建议调用以下接口加载组件库
if (osSelect.isLinux())
HCNetSDK.BYTE_ARRAY ptrByteArray1 = new HCNetSDK.BYTE_ARRAY(256);
HCNetSDK.BYTE_ARRAY ptrByteArray2 = new HCNetSDK.BYTE_ARRAY(256);
//这里是库的绝对路径,请根据实际情况修改,注意改路径必须有访问权限
String strPath1 = System.getProperty("user.dir") + "/lib/libcrypto.so.1.1";
String strPath2 = System.getProperty("user.dir") + "/lib/libssl.so.1.1";
System.arraycopy(strPath1.getBytes(), 0, ptrByteArray1.byValue, 0, strPath1.length());
ptrByteArray1.write();
hCNetSDK.NET_DVR_SetSDKInitCfg(3, ptrByteArray1.getPointer());
System.arraycopy(strPath2.getBytes(), 0, ptrByteArray2.byValue, 0, strPath2.length());
ptrByteArray2.write();
hCNetSDK.NET_DVR_SetSDKInitCfg(4, ptrByteArray2.getPointer());
String strPathCom = System.getProperty("user.dir") + "/lib";
HCNetSDK.NET_DVR_LOCAL_SDK_PATH struComPath = new HCNetSDK.NET_DVR_LOCAL_SDK_PATH();
System.arraycopy(strPathCom.getBytes(), 0, struComPath.sPath, 0, strPathCom.length());
struComPath.write();
hCNetSDK.NET_DVR_SetSDKInitCfg(2, struComPath.getPointer());
//初始化
init();
//登陆
login();
// 创建线程池对象指定线程数量
ExecutorService tp = Executors.newFixedThreadPool(2);
VideoDemo video1=new VideoDemo(lUserIDList.get(0), 1);
VideoDemo video2=new VideoDemo(lUserIDList.get(1),1) ;
tp.submit(video1);
tp.submit(video2);
//登陆
private static void login()
//存储登陆设备集合
List<Device> list = new ArrayList<>();
Device device = new Device();
device.setIp("192.168.1.11");
device.setPassWord("admin");
device.setPassWord("123456");
Device device1 = new Device();
device1.setIp("192.168.1.12");
device1.setPassWord("admin");
device1.setPassWord("123456");
list.add(device);
list.add(device1);
//登录设备,每一台设备分别登录; 登录句柄是唯一的,可以区分设备
HCNetSDK.NET_DVR_USER_LOGIN_INFO m_strLoginInfo;//设备登录信息
HCNetSDK.NET_DVR_DEVICEINFO_V40 m_strDeviceInfo;//设备信息
for (Device d : list)
m_strLoginInfo = new HCNetSDK.NET_DVR_USER_LOGIN_INFO();//设备登录信息
m_strDeviceInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V40();//设备信息
String m_sDeviceIP = d.getIp();//设备ip地址
m_strLoginInfo.sDeviceAddress = new byte[HCNetSDK.NET_DVR_DEV_ADDRESS_MAX_LEN];
System.arraycopy(m_sDeviceIP.getBytes(), 0, m_strLoginInfo.sDeviceAddress, 0, m_sDeviceIP.length());
String m_sUsername = d.getUserName();//设备用户名
m_strLoginInfo.sUserName = new byte[HCNetSDK.NET_DVR_LOGIN_USERNAME_MAX_LEN];
System.arraycopy(m_sUsername.getBytes(), 0, m_strLoginInfo.sUserName, 0, m_sUsername.length());
String m_sPassword = d.getPassWord();//设备密码
m_strLoginInfo.sPassword = new byte[HCNetSDK.NET_DVR_LOGIN_PASSWD_MAX_LEN];
System.arraycopy(m_sPassword.getBytes(), 0, m_strLoginInfo.sPassword, 0, m_sPassword.length());
m_strLoginInfo.wPort = 8000; //SDK端口
m_strLoginInfo.bUseAsynLogin = false; //是否异步登录:0- 否,1- 是
m_strLoginInfo.write();
lUserID = hCNetSDK.NET_DVR_Login_V40(m_strLoginInfo, m_strDeviceInfo);
//将登陆返回的用户句柄保存!(这里很重要 是原先官网没有的,这里保存句柄是为了预览使用)
lUserIDList.add(lUserID);
if (lUserID==-1)
System.out.println("登录失败,错误码为" + hCNetSDK.NET_DVR_GetLastError());
else
System.out.println("设备登录成功! " + "设备序列号:" + new String(m_strDeviceInfo.struDeviceV30.sSerialNumber).trim());
m_strDeviceInfo.read();
//保存回调函数的音频数据
VideoDemo.setFile(lUserID);
//初始化
private static void init()
//SDK初始化,一个程序只需要调用一次
boolean initSuc = hCNetSDK.NET_DVR_Init();
if (initSuc != true)
System.out.println("初始化失败");
//异常消息回调
if (fExceptionCallBack == null)
fExceptionCallBack = new FExceptionCallBack_Imp();
Pointer pUser = null;
if (!hCNetSDK.NET_DVR_SetExceptionCallBack_V30(0, 0, fExceptionCallBack, pUser))
return;
System.out.println("设置异常消息回调成功");
//启动SDK写日志
hCNetSDK.NET_DVR_SetLogToFile(3, "..\\\\sdkLog\\\\", false);
/**
* 动态库加载
*
* @return
*/
private static boolean CreateSDKInstance()
if (hCNetSDK == null)
synchronized (HCNetSDK.class)
String strDllPath = "";
try
if (osSelect.isWindows())
//win系统加载库路径
//strDllPath = System.getProperty("user.dir") + "\\\\lib\\\\HCNetSDK.dll";
strDllPath = "E:\\\\eclipse2019work\\\\ClientDemo-NetBeansPro\\\\HCNetSDK.dll";
else if (osSelect.isLinux())
//Linux系统加载库路径
// strDllPath = System.getProperty("user.dir") + "/lib/libhcnetsdk.so";
strDllPath = "/usr/local/lib/libhcnetsdk.so";
hCNetSDK = (HCNetSDK) Native.loadLibrary(strDllPath, HCNetSDK.class);
catch (Exception ex)
System.out.println("loadLibrary: " + strDllPath + " Error: " + ex.getMessage());
return false;
return true;
/**
* 播放库加载
*
* @return
*/
private static boolean CreatePlayInstance()
if (playControl == null)
synchronized (PlayCtrl.class)
String strPlayPath = "";
try
if (osSelect.isWindows())
//win系统加载库路径
strPlayPath = System.getProperty("user.dir") + "\\\\lib\\\\PlayCtrl.dll";
else if (osSelect.isLinux())
//Linux系统加载库路径
strPlayPath = System.getProperty("user.dir") + "/lib/libPlayCtrl.so";
playControl = (PlayCtrl) Native.loadLibrary("E:\\\\eclipse2019work\\\\ClientDemo-NetBeansPro\\\\PlayCtrl.dll", PlayCtrl.class);
catch (Exception ex)
System.out.println("loadLibrary: " + strPlayPath + " Error: " + ex.getMessage());
return false;
return true;
//注销设备
public void videoWrite()
//退出程序时调用,每一台设备分别注销
for (int id : lUserIDList)
if (hCNetSDK.NET_DVR_Logout(id))
System.out.println("注销成功");
lUserIDList.clear();
//SDK反初始化,释放资源,只需要退出时调用一次
hCNetSDK.NET_DVR_Cleanup();
VideoDemo.outputStreamMap.clear();
package com.NetSDKDemo;
import com.sun.jna.Pointer;
import com.sun.jna.ptr.ByteByReference;
import com.sun.jna.ptr.IntByReference;
import java.io.*;
import java.lang.reflect.Parameter;
import java.nio.ByteBuffer;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Timer;
import static com.NetSDKDemo.ClinetDemo.hCNetSDK;
import static com.NetSDKDemo.ClinetDemo.playControl;
/**
* 视频取流预览,下载,抓图
*
* @create 2022-03-30-9:48
*/
public class VideoDemo implements Runnable
Timer Downloadtimer;//下载用定时器
Timer Playbacktimer;//回放用定时器
static FRealDataCallBack fRealDataCallBack;//预览回调函数实现
//定义流的map集合
static Map<Integer, FileOutputStream> outputStreamMap = new HashMap();
static int lPlay = -1; //预览句柄
static File file;
private Integer userId;
private Integer iChannelNo;
public VideoDemo(Integer userId, Integer iChannelNo)
this.userId = userId;
this.iChannelNo = iChannelNo;
@Override
public void run()
fRealDataCallBack = null;
if (userId == -1)
System.out.println("请先注册");
return;
HCNetSDK.NET_DVR_PREVIEWINFO strClientInfo = new HCNetSDK.NET_DVR_PREVIEWINFO();
strClientInfo.read();
strClientInfo.hPlayWnd = null; //窗口句柄,从回调取流不显示一般设置为空
strClientInfo.lChannel = iChannelNo; //通道号
strClientInfo.dwStreamType = 0; //0-主码流,1-子码流,2-三码流,3-虚拟码流,以此类推
strClientInfo.dwLinkMode = 0; //连接方式:0- TCP方式,1- UDP方式,2- 多播方式,3- RTP方式,4- RTP/RTSP,5- RTP/HTTP,6- HRUDP(可靠传输) ,7- RTSP/HTTPS,8- NPQ
strClientInfo.bBlocked = 1;
strClientInfo.write();
if (fRealDataCallBack == null)
fRealDataCallBack = new FRealDataCallBack();
//开启预览
lPlay = hCNetSDK.NET_DVR_RealPlay_V40(userId, strClientInfo, fRealDataCallBack, null);
if (lPlay == -1)
int iErr = hCNetSDK.NET_DVR_GetLastError();
System.out.println("取流失败" + iErr);
return;
System.out.println("取流成功");
//创建文件
/**
*
*
* @date 2022/8/31 23:37
* @param userId:登陆返回的用户句柄
*/
public static void setFile(int userId)
file = new File("/Download/" + new Date().getTime() + "(" + userId + ")" + ".mp4"); //保存回调函数的音频数据
if (!file.exists())
try
file.createNewFile();
catch (Exception e)
e.printStackTrace();
// FileOutputStream outputStream=new FileOutputStream(file);
try
outputStreamMap.put(userId, new FileOutputStream(file));
catch (FileNotFoundException e)
e.printStackTrace();
static class FRealDataCallBack implements HCNetSDK.FRealDataCallBack_V30
//预览回调
public void invoke(int lRealHandle, int dwDataType, ByteByReference pBuffer, int dwBufSize, Pointer pUser)
long offset = 0;
ByteBuffer buffers = pBuffer.getPointer().getByteBuffer(offset, dwBufSize);
byte[] bytes = new byte[dwBufSize];
buffers.rewind();
buffers.get(bytes);
try
//从map中取出对应的流读取数据
outputStreamMap.get(lRealHandle).write(bytes);
catch (Exception e)
e.printStackTrace();
实体类
package com;
/**
* @author lws
* @date 2022/8/31 23:07
*/
public class Device
private String ip;
private String userName;
private String passWord;
public String getIp()
return ip;
public void setIp(String ip)
this.ip = ip;
public String getUserName()
return userName;
public void setUserName(String userName)
this.userName = userName;
public String getPassWord()
return passWord;
public void setPassWord(String passWord)
this.passWord = passWord;
小编的代码目录结构
简单总结:
1 初始化
2 登陆设备 并保存登陆设备的用户句柄
3 创建保存回调函数的音频文件
4 创建map集合 存储对应的文件输出流,键为用户句柄
5 对回调函数进行修改
(小编整理后的第二种思路)
VideoDemo类修改 实现Callable接口 回调函数可以什么都不写 直接调海康实时预览接口 预览成功后生成对应视频文件即可(视频需要解码后才可观看,视频想直接看的话需要使用海康提供的视频播放器打开)。
public class VideoDemo implements Callable<Result>
@Inject
private LawCaseInfoService lawCaseInfoService;
static FRealDataCallBack fRealDataCallBack;//预览回调函数实现
static List<Integer> lPlayList = new ArrayList<>();
static int lPlay; //预览句柄
static File file;
//定义流的map集合
static Map<Integer, FileOutputStream> outputStreamMap = new HashMap();
static Map<String, List<Integer>> keyMap = new HashMap<>();
static IntByReference m_lPort = new IntByReference(-1);
static StringBuffer buffer =new StringBuffer();
static HCNetSDK sdk;
private CameraInfo cameraInfo;
private String caseNum;
public Video(Device device,String caseNum)
this.Device = device;
this.caseNum =caseNum;
@Override
public Result call() throws Exception
sdk = HCNetSDK.INSTANCE;
//设置设备通道号 查看Demo代码 通道号为1
// Integer channel = 1;
// cameraInfo.setChannel(channel);
//初始化HCNetSDK接口 实例化对象
if (!sdk.NET_DVR_Init())
System.out.println("初始化失败..................");
//创建设备
HCNetSDK.NET_DVR_DEVICEINFO_V30 deInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V30();
//注册用户设备
Integer id = sdk.NET_DVR_Login_V30(cameraInfo.getAddress(), cameraInfo.getPort(),
cameraInfo.getUserName(), cameraInfo.getPwd(), deInfo);
cameraInfo.setUserId(id);
//判断是否注册成功
if (cameraInfo.getUserId().intValue() < 0)
return Result.error("注册设备失败 错误码为:"+sdk.NET_DVR_GetLastError());
//
else
System.out.println("注册成功 Id为: " + cameraInfo.getUserId().intValue());
//判断是否获取到设备能力
HCNetSDK.NET_DVR_WORKSTATE_V30 devWork = new HCNetSDK.NET_DVR_WORKSTATE_V30();
if (!sdk.NET_DVR_GetDVRWorkState_V30(cameraInfo.getUserId(), devWork))
System.out.println("获取设备能力集失败,返回设备状态失败..............." + "错误码为:" + sdk.NET_DVR_GetLastError());
//启动实时预览功能 创建clientInfo对象赋值预览参数
HCNetSDK.NET_DVR_CLIENTINFO clientInfo = new HCNetSDK.NET_DVR_CLIENTINFO();
clientInfo.lChannel = 1; //设置通道号
clientInfo.lLinkMode = 0; //TCP取流
clientInfo.sMultiCastIP = null; //不启动多播模式
//创建窗口句柄
clientInfo.hPlayWnd = null;
FRealDataCallBack fRealDataCallBack = new FRealDataCallBack();//预览回调函数实现
while (true)
//开启实时预览
Integer key = sdk.NET_DVR_RealPlay_V30(cameraInfo.getUserId(), clientInfo, fRealDataCallBack, null, true);
//判断是否预览成功
if (key.intValue() == -1)
sdk.NET_DVR_Logout(cameraInfo.getUserId());
sdk.NET_DVR_Cleanup();
return Result.error("预览失败,错误码为:"+sdk.NET_DVR_GetLastError());
// System.out.println("预览失败 错误代码为: " + sdk.NET_DVR_GetLastError());
System.out.println("开始预览成功");
//预览成功后 调用接口使视频资源保存到文件中
if (!sdk.NET_DVR_SaveRealData(key, "你自己的视频存放路径.mp4"))
sdk.NET_DVR_StopRealPlay(key);
sdk.NET_DVR_Logout(device.getUserId()); //这里报红 实体类就自己加下这个UserId就好了
sdk.NET_DVR_Cleanup();
return Result.error("保存文件失败 错误码为:"+sdk.NET_DVR_GetLastError());
// System.out.println("保存到文件失败 错误码为: " + sdk.NET_DVR_GetLastError());
return Result.success("录制成功",null);
//
// try
// Thread.sleep(999999);
// catch (Exception e)
//
// e.printStackTrace();
//
//上面设置的睡眠时间可以当做拍摄时长来使用,然后调用结束预览,注销用户,释放资源就可以了
// sdk.NET_DVR_StopRealPlay(key);
// sdk.NET_DVR_Logout(cameraInfo.getUserId());
// sdk.NET_DVR_Cleanup();
// 程序运行完毕退出阻塞状态
// System.exit(0);
// return null;
// @Override
// public void run()
//
//
//创建文件,并将文件路径存储进数据库
public static String setFile(int userId, int i, String caseNum)
Parameter p = ParameterService.me.getByCode("DOCUMENTPATH", "FILESAVEPATH");// 存放文件根目录
// file = new File(p.getRemark() + "/Download/" + caseNum + ")" + "(" + i + ")" + ".mp4"); //保存回调函数的音频数据
file = new File(p.getRemark() + File.separator + "Download" + File.separator + caseNum + ")" + "(" + i + ")" + ".mp4"); //保存回调函数的音频数据
System.out.println("存放的路径为" + p.getRemark() + "/Download/" + caseNum + ")" + "(" + i + ")" + ".mp4");
if (!file.exists())
try
file.createNewFile();
outputStreamMap.put(userId, new FileOutputStream(file));
return p.getRemark() + File.separator + "Download" + File.separator + caseNum + ")" + "(" + i + ")" + ".mp4";
// return p.getRemark() + "/" + "Download" + "/" + caseNum + ")" + "(" + i + ")" + ".mp4";
catch (Exception e)
e.printStackTrace();
return null;
/**
* @author lws
* @date 2022/8/26 16:29
* @param预览回调接口实现类
*/
class FRealDataCallBack implements HCNetSDK.FRealDataCallBack_V30
@Override
public void invoke(int lRealHandle, int dwDataType, ByteByReference pBuffer, int dwBufSize, Pointer pUser)
Result(公共返回数据类)
public class Result
private boolean flag;
private Integer code;
private String message;
private Object data;
public Result()
public Result(boolean flag, Integer code, String message, Object data)
super();
this.flag = flag;
this.code = code;
this.message = message;
this.data = data;
public Result(boolean flag, Integer code, String message)
super();
this.flag = flag;
this.code = code;
this.message = message;
public boolean isFlag()
return flag;
public void setFlag(boolean flag)
this.flag = flag;
public Integer getCode()
return code;
public void setCode(Integer code)
this.code = code;
public String getMessage()
return message;
public void setMessage(String message)
this.message = message;
public Object getData()
return data;
public void setData(Object data)
this.data = data;
public static Result success(String msg, Object data)
return new Result(true, 200, msg, data);
public static Result error(String msg)
return new Result(false, 500, msg, null);
public static Result error(String msg, Object data,Integer code)
return new Result(true, code, msg, data);
最后Main方法自己改下实现方式就🆗了 这次时间紧 修改的急 就大概说下 有时间了 我再详细将代码整理下
大佬勿喷!!!!!!!!!!!!!!!!!!!!! 写这个博客只是希望可以帮到大家
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