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 {
	
	@Id
	private 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>();
	
	@Id
	private 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 60s
		recorder.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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