服务支撑：FFmpeg + srs(流媒体服务器)
整个流程是 FFmpeg 收流转码 推 rtmp 到流媒体服务 流媒体服务再 分发流到公网
搭建流媒体服务:
1. SRS (Simple Realtime Server) | SRS （本例子使用的是SrS 安装使用docker ）
2.GitHub - ZLMediaKit/ZLMediaKit: WebRTC/RTSP/RTMP/HTTP/HLS/HTTP-FLV/WebSocket-FLV/HTTP-TS/HTTP-fMP4/WebSocket-TS/WebSocket-fMP4/GB28181/SRT server and client framework based on C++11
3.nginx实现 （自己百度）
4. 其他的还有收费的那种
2.服务器安装FFmpeg yum 可以安装
java 服务实现调用ffmpeg
1.ProcessManager 用于执行指令以及 关闭这个流等操作
package io.renren.common.live;import cn.hutool.core.thread.ThreadUtil;
import org.springframework.beans.factory.DisposableBean;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.ref.WeakReference;
import java.util.HashMap;
import java.util.Map;/*** @author chenkang* @date 2023年8月3日09:43:21*/
public class ProcessManager implements DisposableBean {private Map<String, WeakReference<Process>> processMap=new HashMap<>();/*** 启动一个进程* @param processName 进程名称key* @param command 执行指令*/public void startProcess(String processName, String command) {ThreadUtil.execAsync(() -> {try {ProcessBuilder processBuilder = new ProcessBuilder(command.split(" "));Process process = processBuilder.start();processMap.put(processName, new WeakReference<>(process));BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()));String line;while ((line = reader.readLine()) != null) {System.out.println(processName + ": " + line);}int exitCode = process.waitFor();System.out.println(processName + ": Process execution completed with exit code: " + exitCode);} catch (IOException | InterruptedException e) {e.printStackTrace();}});}/*** 销毁* @param processName key*/public void terminateProcess(String processName) {WeakReference<Process> weakRef = processMap.get(processName);if (weakRef != null) {Process process = weakRef.get();if (process != null) {process.destroy();}processMap.remove(processName);}}private void terminateAllProcesses() {for (WeakReference<Process> weakRef : processMap.values()) {Process process = weakRef.get();if (process != null) {process.destroy();}}}@Overridepublic void destroy() throws Exception {this.terminateAllProcesses();this.processMap.clear();}
}对接的是大华的摄像头
/**
* 开始推流
* 备注：现在客户的设备是NVR NVR 下大概有54个摄像头 公网映射rtsp 554 端口 根据channel 开区分是那个摄像头
* 必须条件：1.服务端要安装好 ffmpeg 2.要搭建一个流媒体服务器 这个使用的是 srs
* 流程：用户端想要查看某个摄像头->查询到设备信息获取到摄像头的channel 这个是提前维护好的
* ->拿到channel走如下方法 调用FFmpeg 执行转码推流指令（客户的摄像头是h265）-》rtsp流会被转码 重新设定分辨率 码率转h264 并把转码流推向流媒体服务器 srs
* ->客户想看的时候就 拉取 流媒体服务端的rtmp流 完成播放
*
* 其他：
* 1.用户再播放的时候 要先确定这个摄像头有没有别的人在观看 观看了就不在执行了 （1.可以调用srs 接口查询流是不是存在 这个比较稳妥 2.或者是 processManager 判断是否在推了）
* 2.有时候用户强制关闭客户端 无法感知用户不在观看了，这面还要 定时的去调用srs 接口查询闲置的流及时的给关闭 同时也要 把服务的process 给主动关闭不然一直推
* 这个要先去关闭process再调用接口关闭srs服务的流
*
*
* http://127.0.0.1:1985/api/v1/streams 查询服务端所有流
*{
* "code": 0,
* "server": "vid-f1gt8j3",
* "streams": [
* {
* "id": "vid-143p019",
* //streamName
* "name": "3",
* "vhost": "vid-5847096",
* "app": "live",
* "live_ms": 1691039306435,
* //客户端数量 这个要注意 默认就有1 个客户端是推流
* "clients": 1,
* "frames": 0,
* "send_bytes": 0,
* "recv_bytes": 1068,
* "kbps": {
* "recv_30s": 0,
* "send_30s": 0
* },
* "publish": {
* //是否正在推流 有时候服务端流停推了 但是还有客户端在看 这个流还能查到 但是 active 为false
* "active": false,
* "cid": ""
* },
* "video": null,
* "audio": null
* }
* ]
* }
*
*
*
* http://127.0.0.1:1985/api/v1/clients
*
*{
* "code": 0,
* "server": "vid-f1gt8j3",
* "clients": [
* {
* "id": "868249e9",
* "vhost": "vid-5847096",
* "stream": "vid-778ujy0",
* "ip": "172.17.0.1",
* "pageUrl": "",
* "swfUrl": "",
* "tcUrl": "rtmp://127.0.0.1:1935/live",
* "url": "/live/9",
* //类型是 fmle-publish 推流 删除掉这个推流就会停止
* //类型是 rtmp-play 拉流 删除掉这个拉流就会停止
* //剔除方法 Method DELETE api /api/v1/clients/{id} 停止推流/踢掉用户端
* "type": "fmle-publish",
* "publish": true,
* "alive": 16.18,
* "kbps": {
* "recv_30s": 0,
* "send_30s": 0
* }
* }
* ]
* }
*
*
* @param channel
*/
@GetMapping("/start")@ResponseBodypublic void start(@RequestParam(defaultValue = "1") String channel){RtspUrlBuilder builder = new RtspUrlBuilder();RtmpUrlBuilder rtmpUrlBuilder = new RtmpUrlBuilder();//构建 rtsp 这个是客户的nvr rtsp 地址 只有channel 是灵活的 他们是64路 现在接了50多摄像头对应50 多路channelString rstp = builder.setUsername("admin").setPassword("xx").setIpAddress("xx").setChannel(channel).build();//这个是流媒体服务器的rtmp 推流地址String rtmp = rtmpUrlBuilder.setApplication("live").setStreamName(channel).build();final String vcodec="libx264";String camera1=String.format(RTSP_RTMP, rstp,vcodec,rtmp);//TODO 判断是否已经再推了 推就直接返回拉流地址processManager.startProcess(channel,camera1);//拉流地址和推流地址是一至的 除非 java 服务和srs 在一台服务器 那么 推流地址 rtmp ip为127.0.0.1 拉流 rtmp ip 为公网// 就是java通过ffmpeg 收流转发到本地 rtmp srs分发流 到公网去System.out.println("拉流地址："+rtmp);}@GetMapping("/end")@ResponseBodypublic void end(String channel){processManager.terminateProcess(channel);}
两个辅助类：
package io.renren.common.live;/*** @author chenkang* @date 2023-8-3 12:27*/
public class RtspUrlBuilder {private String username;private String password;private String ipAddress;private int port;private String channel;private int subtype;public RtspUrlBuilder() {// 默认端口为554this.port = 554;// 默认子类型为0this.subtype = 0;}public RtspUrlBuilder setUsername(String username) {this.username = username;return this;}public RtspUrlBuilder setPassword(String password) {this.password = password;return this;}public RtspUrlBuilder setIpAddress(String ipAddress) {this.ipAddress = ipAddress;return this;}public RtspUrlBuilder setPort(int port) {this.port = port;return this;}public RtspUrlBuilder setChannel(String channel) {this.channel = channel;return this;}public RtspUrlBuilder setSubtype(int subtype) {this.subtype = subtype;return this;}public String build() {return "rtsp://" + username + ":" + password + "@" + ipAddress + ":" + port +"/cam/realmonitor?channel=" + channel + "&subtype=" + subtype;}
}package io.renren.common.live;/*** @author chenkang* @date 2023-8-3 12:30*/
public class RtmpUrlBuilder {private String ipAddress;private int port;private String application;private String streamName;public RtmpUrlBuilder() {// 默认IP地址为127.0.0.1this.ipAddress = "127.0.0.1";// 默认端口为1935this.port = 1935;}public RtmpUrlBuilder setIpAddress(String ipAddress) {this.ipAddress = ipAddress;return this;}public RtmpUrlBuilder setPort(int port) {this.port = port;return this;}public RtmpUrlBuilder setApplication(String application) {this.application = application;return this;}public RtmpUrlBuilder setStreamName(String streamName) {this.streamName = streamName;return this;}public String build() {return "rtmp://" + ipAddress + ":" + port + "/" + application + "/" + streamName;}
}
编辑器？)
)
