由于最近在开发海康威视摄像头,特此记录一下如何提取音频数据,这里主要依靠语音对讲返回的音频数据,通过回调函数写入文件中,加个WAV头即可播放,编码格式可以自己设置在代码中有注释
文件结构
其中CameraInfo内容可以参看海康威视摄像机SDK二次开发–实时预览视频流保存到指定文件中
HIKSDKSaveRealData中的内容
package ClientDemo;import ClientDemo.CameraInfo;import com.sun.jna.NativeLong;import com.sun.jna.Pointer;import com.sun.jna.ptr.ByteByReference;import com.sun.jna.ptr.IntByReference;import javax.swing.*;import java.io.*;import java.util.HashMap;import java.util.Map;import java.util.Properties;import java.util.SimpleTimeZone;public class HIKSDKSaveRealData {private static Map configParam;public static void main(String[] args) throws Exception {HIKSDKSaveRealData HikSdk = new HIKSDKSaveRealData();/* 此处创建对象也可以创建file对象 */// 创建流对象BufferedReader br = null;try {br = new BufferedReader(new FileReader("F:\\debug\\hksdk\\javademo\\src\\ClientDemo\\config.txt"));configParam = new HashMap();CameraInfo cameraInfo = new CameraInfo();String line = null;int count = 0;while ((line = br.readLine()) != null) {if (line != "" && line.length() > 0 && count > 0) {String[] split = line.split("\\s+");configParam.put(count + "param", split);count++;} else if (line != "" && line.length() > 0 && count == 0) {String[] split = line.split("\\s+");// 设置IP等参数到对象中System.out.println(split[0]);System.out.println(split[1]);cameraInfo.setAddress(split[0]);cameraInfo.setPort(Short.parseShort(split[1]));cameraInfo.setUserName(split[2]);cameraInfo.setPwd(split[3]);count++;}}br.close();//查看当前DVR参数信息和初始化注册等 传入连接信息// HikSdk.getDVRConfig(cameraInfo);HikSdk.VoiceForward(cameraInfo);} catch (IOException e) {e.printStackTrace();}}/****************************************************************** 语音方法* parameters: cameraInfo* return:null* ****************************************************************/FileWriter fLocal; //本地音频文件FileWriter fDevice; //设备发送的音频文件NativeLong nativeLong;HCNetSDK sdk = HCNetSDK.INSTANCE;void VoiceForward(CameraInfo cameraInfo) {CameraInfo parameter = getParameter(cameraInfo);//判断是否注册成功if (parameter.getUserId().intValue() < 0) {System.out.println("注册设备失败 错误码为: " + _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_DVR_WORKSTATE_V30 devWork = new _DVR_WORKSTATE_V30();if (!_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...............");return;}try {/** 设置语音对象的编码类型* 编码类型:G711* 音频数据采样率: 16000* 格式: 16位采样并且单通道* */_DVR_COMPRESSION_AUDIO audio = new _DVR_COMPRESSION_AUDIO();audio.byAudioEncType = 1;fLocal = new FileWriter("F:\\debug\\hksdk\\javademo\\data\\local.pcm");fDevice = new FileWriter("F:\\debug\\hksdk\\javademo\\data\\device.pcm");FVoiceDataCallBack fVoiceDataCallBack = new FVoiceDataCallBack();JComboBox jComboBoxDataType = new javax.swing.JComboBox();nativeLong = _DVR_StartVoiceCom_V30(cameraInfo.getUserId(), 0, jComboBoxDataType.getSelectedIndex() == 2, fVoiceDataCallBack, null);if (nativeLong.intValue() == -1) {System.out.println(111);}try {Thread.sleep(20000);} catch (InterruptedException e) {e.printStackTrace();}_DVR_StopVoiceCom(nativeLong);_DVR_Logout(nativeLong);_DVR_Cleanup();} catch (IOException e) {e.printStackTrace();}}/**语音对讲回调函数*/class FVoiceDataCallBack implements HCNetSDK.FVoiceDataCallBack_V30 {//对对讲的音频数据进行回调操作,以下写入文件操作public void invoke(NativeLong lVoiceComHandle, String pRecvDataBuffer, int dwBufSize, byte byAudioFlag, Pointer pUser) {//byAudioFlag为0表示本地文件,为1表示设备的音频文件if (byAudioFlag == 0) {try {fLocal.write(pRecvDataBuffer);fLocal.flush();} catch (IOException ex) {//Logger.getLogger(JDialogVoiceTalk.class.getName()).log(Level.SEVERE, null, ex);System.out.println('1');}} else {if (byAudioFlag == 1) {try {fDevice.write(pRecvDataBuffer);fDevice.flush();} catch (IOException ex) {// Logger.getLogger(JDialogVoiceTalk.class.getName()).log(Level.SEVERE, null, ex);System.out.println('2');}}}}}/****************************************************************** 注册设备并返回参数* 目的: 注册设备并返回key :Nativelong* parameters: cameraInfo*return: cameraInfo* ****************************************************************/private CameraInfo getParameter(CameraInfo cameraInfo) {//设置设备通道号 查看Demo代码 通道号为1NativeLong channel = new NativeLong(1);cameraInfo.setChannel(channel);if (!_DVR_Init()) {System.out.println("初始化失败..................");}//创建设备_DVR_DEVICEINFO_V30 deInfo = new _DVR_DEVICEINFO_V30();//注册用户设备NativeLong id = _DVR_Login_V30(cameraInfo.getAddress(), cameraInfo.getPort(),cameraInfo.getUserName(), cameraInfo.getPwd(), deInfo);cameraInfo.setUserId(id);return cameraInfo;}}
