前言

哪一天我心血来潮，想把我儿子学校的摄像头视频流录制下来，并保存到云盘上，这样我就可以在有空的时候看看我儿子在学校干嘛。想到么就干，当时花了一些时间开发了一个后端服务，通过数据库配置录制参数，以后的设想是能够通过页面去配置，能够自动捕获直播视频流，这还得要求自己先学会vue，所以还得缓缓。

实现

技术栈：Spring Boot、Webflux、r2dbc、javacv

架构图：

流程很简单，主要还是要用到JavaCV从视频流里捕获视频，先报错到本地，然后有一个定时任务会定时去检测目录内是否有新生成的文件，有就上传到配置的云盘（百度云）。

1、创建pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.6.4</version><relativePath /> <!-- lookup parent from repository --></parent><groupId>net.178le</groupId><artifactId>video-cloud-record</artifactId><version>0.0.1-SNAPSHOT</version><name>video-cloud-record</name><description>视频云录制</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-webflux</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-r2dbc</artifactId></dependency><dependency><groupId>dev.miku</groupId><artifactId>r2dbc-mysql</artifactId></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.7.22</version></dependency><dependency><groupId>org.bytedeco</groupId><artifactId>javacv-platform</artifactId><version>1.4.4</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.10</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.6</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>io.projectreactor</groupId><artifactId>reactor-test</artifactId><scope>test</scope></dependency></dependencies><build><finalName>video-cloud-record</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build></project>

2、定时异常信息

package net.video.record.config;import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;import lombok.extern.slf4j.Slf4j;/*** @desc 全局异常捕捉并转换异常*/
@Slf4j	
@RestControllerAdvice(basePackages = "net.video.record")
public class GlobalExceptionHandler {@ExceptionHandler(Exception.class)public Result<String> handleException(Exception e) {log.error("{}", e);return Result.error("", e.getMessage());}}

3、统一结果集

package net.video.record.config;import cn.hutool.core.util.StrUtil;
import lombok.AllArgsConstructor;
import lombok.Data;@Data
@AllArgsConstructor
public class Result<T> {private String code;private T data;private String msg;public static <T> Result<T> ok(T data) {return new Result<T>("0", data, "");}public static <T> Result<T> error(String code, String msg) {code = StrUtil.isEmpty(code)? "500" : code;return new Result<T>(code, null, msg);}
}

4、定义两个Model

TaskList 用来保存用户相关的录制任务

package net.video.record.entity.model;import java.time.LocalDateTime;
import java.util.Date;import org.springframework.data.annotation.Id;
import org.springframework.data.relational.core.mapping.Table;import lombok.Data;@Data
@Table("task_list")
public class TaskList {@Idprivate Integer id;private String name;private String streamUrl;private Integer userId;private Integer status;private Integer delFlag;private LocalDateTime createTime;private LocalDateTime modifyTime;private String runRule;private LocalDateTime lastRunTime;private Integer recordTime;private Integer segTime;}

User 定义用户信息，保存了用过相关的录制参数

package net.video.record.entity.model;import java.time.LocalDateTime;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;import org.springframework.data.annotation.Id;
import org.springframework.data.relational.core.mapping.Table;import lombok.Data;
import lombok.experimental.Accessors;@Data
@Accessors(chain = true)
@Table("user")
public class User {public static Map<Integer, User> userMap = new ConcurrentHashMap<Integer, User>();@Idprivate Integer id;private String userName;private String password;private String bdAccessToken;private String bdRefreshToken;private LocalDateTime createTime;private LocalDateTime modifyTime;}

5、几个VO

TaskReq 任务请求参数

package net.video.record.entity.vo;import lombok.Data;
import lombok.experimental.Accessors;@Data
@Accessors(chain = true)
public class TaskReq {private Integer taskId;
}

UserReq

package net.video.record.entity.vo;import lombok.Data;@Data
public class UserReq {private String userName;private String password;
}

UserRes

package net.video.record.entity.vo;import java.time.LocalDateTime;import com.fasterxml.jackson.annotation.JsonFormat;import lombok.Data;@Data
public class UserRes {private Integer id;private String userName;private String password;@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")private LocalDateTime createTime;@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")private LocalDateTime modifyTime;
}

6、把网盘接口封装一下

我封装的是百度网盘，可以去网盘开放平台查看文档，这里贴出主要的上传代码。

public String upload(BdFileUpload req, TaskList task) {User user = User.userMap.get(task.getUserId());if (user == null) {throw new RuntimeException("用户信息不存在");}//大于4m的话分片，这里先不处理分片File file = req.getFile();req.setAccess_token(user.getBdAccessToken());List<String> fileMd5 = Arrays.asList(SecureUtil.md5(file));PreCreateReq preCreateReq = new PreCreateReq().setAccess_token(req.getAccess_token()).setAutoinit(1).setIsdir(0).setRtype(1).setPath("/apps/直播云存储/" + task.getId() + "/" + DateUtil.today() + "/" + file.getName()).setSize(String.valueOf(file.length())).setBlock_list(JSONUtil.toJsonStr(fileMd5));PreCreateRes preCreate = preCreate(preCreateReq);for (int i = 0; i < fileMd5.size(); i++) {SegUploadReq segUploadReq = new SegUploadReq().setAccess_token(req.getAccess_token()).setPath(preCreate.getPath()).setUploadid(preCreate.getUploadid()).setPartseq(i).setFile(req.getFile());SegUploadRes segUploadRes = SegUpload(segUploadReq);}CreateFileReq createFileReq = new CreateFileReq().setAccess_token(req.getAccess_token()).setBlock_list(JSONUtil.toJsonStr(fileMd5)).setPath(preCreateReq.getPath()).setSize(preCreateReq.getSize()).setIsdir(preCreateReq.getIsdir()).setRtype(preCreateReq.getRtype()).setUploadid(preCreate.getUploadid());CreateFileRes createFile = createFile(createFileReq);return createFile.getServer_filename();}

7、视频流录制部分

/*** 录制视频* @param inputFile 该地址可以是网络直播/录播地址，也可以是远程/本地文件路径* @param outputFile 该地址只能是文件地址，如果使用该方法推送流媒体服务器会报错，原因是没有设置编码格式* @param audioChannel 是否录制音频 1录制* @param time 录制时间* @throws Exception* @throws org.bytedeco.javacv.FrameRecorder.Exception*/public void frameRecord(String inputFile, String outputFile, int audioChannel, int time)throws Exception, org.bytedeco.javacv.FrameRecorder.Exception {// 获取视频源FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputFile);// 流媒体输出地址，分辨率（长，高），是否录制音频（0:不录制/1:录制）FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFile, 1280, 720, audioChannel);recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);//设置分片recorder.setFormat("segment");//生成模式 实时recorder.setOption("segment_list_flags", "live");//分片时长 60srecorder.setOption("segment_time", "60");//锁定分片时长recorder.setOption("segment_atclocktime", "1");//用来严格控制分片时长recorder.setOption("break_non_keyframes", "1");//设置日志级别avutil.av_log_set_level(avutil.AV_LOG_ERROR);// 开始取视频源try {grabber.start();recorder.start();Frame frame = null;Date startDate = new Date();while ((frame = grabber.grabFrame()) != null && DateUtil.between(startDate, new Date(), DateUnit.SECOND) <= time * 60) {recorder.record(frame);}recorder.stop();grabber.stop();} finally {if (grabber != null) {grabber.stop();}}}

总结

这里我只贴出了部分代码，如果有想要了解具体实现的，也可以留言跟我交流。这个系统我也只是快速实现了一下，只达到能用的程度，其中对javacv、webflux进行了一定学习研究，后续的完善，还要看我哪天再次心血来潮。

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