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阿里云直播、直播录制和点播

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  • Post category:其他


近来公司有个直播类的项目，让我调研下阿里云直播，花了3、4天调研结束后，做下笔记，一方面自己日后便于查看，另一方面与大家做个交流，有说的不正确的。欢迎指正。

需求说明：本项目有三个媒体端，分别是app、微信和pc。下面分别讲述下三个媒体端的场景。


  • app端是给讲师直播用的

  • 微信端是给学员看直播用的

  • pc端是给管理员用的

下面介绍下阿里云的直播使用：

1.在app端需要推流到阿里云cdn,需要应用服务器生成一个推流地址(有推流地址就能拼出拉流地址),且配置回调监听推流状态.(如图-1所示)

2.在微信端需要拉流地址(直播地址),需要从应用服务器拿到拉流地址

3.配置直播录播转点播后，直播推流中断三分钟后，直播的视频会被传输到点播，此时配置一个回调地址(针对两种情况进行回调,如图-2所示)

a.直播视频已经被传输到点播(注意:此时已经得到videoid，但是视频还在转码，还是无法播放)

b.传输到点播的视频已经转码成功(此时可以播放视频了)

图-1

图-2 

package com.yx.tsing.course.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;
import com.yx.tsing.common.ConsHint;
import com.yx.tsing.common.Constant;
import com.yx.tsing.common.result.JsonPageResult;
import com.yx.tsing.common.result.JsonResult;
import com.yx.tsing.course.domain.Course;
import com.yx.tsing.course.service.CourseService;
import com.yx.tsing.course.vo.*;
import com.yx.tsing.utils.AliUtil;
import com.yx.tsing.utils.MD5Util;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.util.Assert;
import org.springframework.web.bind.annotation.*;
import tk.mybatis.mapper.entity.Example;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.text.MessageFormat;
import java.util.Date;

/**
 * create by zml on 2018/3/6 16:52
 */
@RestController
@RequestMapping("/course")
public class CourseController {

    @Autowired
    private CourseService courseService;

    @Value("#{configProperties['live.appName']}")
    private String appName;

    @Value("#{configProperties['live.streamName']}")
    private String streamName;

    @Value("#{configProperties['live.vhost']}")
    private String vhost;

    @Value("#{configProperties['live.key']}")
    private String key;

    /**
     * 根据课程id拿到推流地址
     * @param id
     * @throws Exception
     */
    @RequestMapping(value = "/pushUrl")
    public JsonResult pushUrl(long id) {
        //传入自定义参数，即传入应用名称和流名称
//        String AppName = "tsonline";
        String StreamName = streamName +"_"+id;
//        String vhost = "live.ayxsoft.top";
        //时间戳，有效时间
        long time = System.currentTimeMillis() + 1800;
        //加密key，即直播后台鉴权里面自行设置
//        String key = "qreVeWGNRC";
        String strpush = "/" + appName + "/" + StreamName + "-" + time + "-0-0-" + key;
        // 里面的直播推流中心服务器域名、vhost域名可根据自身实际情况进行设置
        String pushurl = "rtmp://video-center.alivecdn.com/" + appName + "/" + StreamName + "?vhost=" + vhost + "&auth_key=" + time + "-0-0-" + MD5Util.getMD5(strpush);
//        $strviewrtmp = "/$AppName/$StreamName-$time-0-0-$key";
//        $strviewflv = "/$AppName/$StreamName.flv-$time-0-0-$key";
        String strviewm3u8 = "/" + appName + "/" + StreamName + ".m3u8-" + time + "-0-0-" + key;

        String rtmpurl = "rtmp://" + vhost + "/" + appName + "/" + StreamName + "?auth_key=" + time + "-0-0-" + MD5Util.getMD5(strpush);
//        $flvurl = "http://live1.playzhan.com/$AppName/$StreamName.flv?auth_key=$time-0-0-".md5($strviewflv);
        String m3u8url = "http://" + vhost + "/" + appName + "/" + StreamName + ".m3u8?auth_key=" + time + "-0-0-" + MD5Util.getMD5(strviewm3u8);
        //打印推流地址，即通过鉴权签名后的推流地址
        System.out.println("推流地址== " + pushurl);
        //打印三种直播协议播放地址，即鉴权后的播放地址
        System.out.println("播放地址rtmp PushUrlVo==" + rtmpurl);
//        echo $flvurl.'<br>';
        System.out.println("播放地址m3u8url==" + m3u8url);

        //保存播放地址到数据库
        courseService.playUrl(id,rtmpurl+";"+m3u8url);

        return new JsonResult(true,"success!",new PushUrlVo(pushurl));
    }

    /**
     * 阿里云直播平台通知用户当前域名推流状态,例如推流成功或者断流
     * 中心推流回调(判断课程是否在直播)
     * @throws Exception
     */
    @RequestMapping(value = "/pushCallBack")
    public void pushCallBack(@RequestParam(value = "action",defaultValue = "",required = false) String action,
                             @RequestParam(value = "app",defaultValue = "",required = false) String app,
                             @RequestParam(value = "appname",defaultValue = "",required = false) String appname,
                             @RequestParam(value = "id",defaultValue = "",required = false) String id,
                             @RequestParam(value = "ip",defaultValue = "",required = false) String ip,
                             @RequestParam(value = "node",defaultValue = "",required = false) String node) {
        System.out.println("action=="+action);//publish和publish_done
        System.out.println("app=="+app);//
        System.out.println("appname=="+appname);//
        System.out.println("id=="+id);//
        System.out.println("ip=="+ip);//171.13.130.227
        System.out.println("node=="+node);//et2

        long courseId = Long.valueOf(id.split("_")[1]);
        int type = 1;
        if("publish".equals(action)){
            type = 2;
        }else if("publish_done".equals(action)){
            type = 3;
        }
        courseService.setType(courseId ,type);
    }

    /**
     * 1.开启直播录制到点播后，当完成一个录制周期或直播流结束时会生成一个点播视频,此时阿里云点播平台会回调此接口
     * 2.视频在点播平台转码成功会回调此接口
     * 点播回调
     * @param request
     * @param response
     * @throws Exception
     */
    @RequestMapping(value = "/playCallBack")
    public void callBack(HttpServletRequest request, HttpServletResponse response) throws Exception {
        String c_length=request.getHeader("content-length");
        int c_i=Integer.parseInt(c_length);
        //解析阿里回调服务器的接口数据
        String result = AliUtil.GetPostBody(request.getInputStream(), c_i);
        System.out.println("resultCallBack=="+result);

        JSONObject jsonObject = JSON.parseObject(result);
        String EventType = jsonObject.getString("EventType");
        String Status = jsonObject.getString("Status");
        if("AddLiveRecordVideoComplete".equals(EventType)){ //第一种情况,直播录制转点播成功
            if("success".equals(Status)){
                //保存返回来的文件信息
                //{"Status":"success","VideoId":"e5524b741330406c99e08698433dd387","StreamName":"StreamName_1","RecordStartTime":"2018-03-06T07:51:38Z","EventType":"AddLiveRecordVideoComplete","DomainName":"live.ayxsoft.top","RecordEndTime":"2018-03-06T07:53:47Z","UserId":1023641609718688,"EventTime":"2018-03-06T07:56:47Z","AppName":"tsonline"}
                String videoId = jsonObject.getString("VideoId");
                String StreamName = jsonObject.getString("StreamName");
                long courseId = Long.valueOf(StreamName.split("_")[1]);

                Course course = new Course();
                course.setId(courseId);
                course.setType(3);
                course.setRecordPath(videoId);
                course.setUpdateTime(new Date());
                courseService.updateByPrimaryKeySelective(course);
                //返回给点播服务器
                AliUtil.response(request, response, "{\"Status\":\"OK\"}", HttpServletResponse.SC_OK);
            } else {
                AliUtil.response(request, response, "{\"Status\":\"verdify not ok\"}", HttpServletResponse.SC_BAD_REQUEST);
            }

        }else if("TranscodeComplete".equals(EventType)){//第二种情况,视频在点播平台转码成功
            if("success".equals(Status)){
                //保存返回来的文件信息d
                //{"VideoId": "43q9fjasjdflask","Status": "success","StreamInfos":[],"EventTime": "2017-03-20T07:49:17Z","EventType": "TranscodeComplete"}
                String videoId = jsonObject.getString("VideoId");
                String status = jsonObject.getString("Status");

                if("success".equals(status)){
                    Example example = new Example(Course.class);
                    Example.Criteria criteria = example.createCriteria();
                    criteria.andEqualTo("recordPath",videoId);
                    criteria.andEqualTo("type",3);//只考虑 直播录播到点播转码成功 的情况

                    Course course = new Course();
                    course.setType(4);
                    course.setUpdateTime(new Date());
                    courseService.updateByExampleSelective(course,example);
                }

                //返回给点播服务器
                AliUtil.response(request, response, "{\"Status\":\"OK\"}", HttpServletResponse.SC_OK);
            } else {
                AliUtil.response(request, response, "{\"Status\":\"verdify not ok\"}", HttpServletResponse.SC_BAD_REQUEST);
            }
        }


    }

}

下面介绍下阿里云的点播使用：

1.上传,上传时需要请求应用服务器拿到上传权限和上传地址

2.播放.播放有两种方式，一种是用阿里云播放器，另一种是使用自有、开源播放器

第一种，需要播放凭证(很安全，确保视频不会被盗用)或者播放地址(可以开启鉴权使生成的地址有时效性，相对安全)；

第二种只需要播放地址即可


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