SpringBoot整合FFmpeg进行视频分片上传（Linux）

SpringBoot整合FFmpeg进行视频分片上传（Linux）

上传的核心思路：
1.将文件按一定的分割规则（静态或动态设定，如手动设置20M为一个分片），用slice分割成多个数据块。
2.为每个文件生成一个唯一标识Key，用于多数据块上传时区分所属文件。
3.所有分片上传完成，服务端校验合并标识为Key的所有分片为一个最终文件。

分片上传到意义：
将文件分片上传，在网络环境不佳时，可以对文件上传失败的部分重新上传，避免了每次上传都需要从文件起始位置上传的问题。
分片的附带好处还能很方便的实现进度条。

分片上传的原理：
使用ffmpeg，把视频文件切片成m3u8，并且通过springboot，可以实现在线的点播。
客户端上传视频到服务器，服务器对视频进行切片后，返回m3u8，封面等访问路径。可以在线的播放。

准备工作：
需要先在linux下安装FFmpeg，并配置环境变量
一：下载、解压
使用命令下载：

wget https://johnvansickle.com/ffmpeg/release-source/ffmpeg-4.1.tar.xz
#使用命令解压：
cd  /root/FFmpeg
tar -xvJf ffmpeg-4.1.tar.xz 
# 编辑准备
cd /root/FFmpeg/ffmpeg-4.1    # 切换到ffmpeg-4.1目录
yum install gcc  # 安装gcc编译器

yasm安装包

cd /root/FFmpeg
wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz  #下载源码包
tar zxvf yasm-1.3.0.tar.gz #解压
cd yasm-1.3.0 #进入目录
./configure #配置
make && make install #编译安装

安装FFmpeg

cd /root/FFmpeg/ffmpeg-4.1/
./configure --enable-shared --prefix=/usr/local/ffmpeg-4.1
make && make install #编译安装

下载x264

cd /root/libx264/
yum -y install git
git clone https://git.videolan.org/git/x264.git

安装nasm

tar -xvf nasm-2.14.02.tar.gz 
cd nasm-2.14.02
./configure
make
sudo make install
#查看是否安装成功
nasm -version

安装x264

cd /root/FFmpeg/libx264/x264
./configure --prefix=/usr/softinstall/x264/ --includedir=/usr/local/include --libdir=/usr/local/lib --enable-shared
make
sudo make install

安装FFmpeg

#配置 /etc/ld.so.conf
vim /etc/ld.so.conf #通过vim指令进入位于etc目录中的ld.so.conf
#输入i进入插入模式，将第二行的内容插入到该文件
include ld.so.conf.d/*.conf
/usr/local/ffmpeg-4.1/lib

ldconfig  #ldconfig 是一个动态链接库管理命令，其目的为了让动态链接库为系统所共享。
make
sudo make install
# ffmpeg  -i  /root/FFmpeg/wukel.mp4  -c:v  libx264  -c:a  copy  -hls_key_info_file  /root/FFmpeg/video_folder/20220308/test1/  -hls_time  15  -hls_playlist_type  vod  -hls_segment_filename  %06d.ts  index.m3u8
ldd ffmpeg
cd /root/FFmpeg/ffmpeg-4.1
./configure --prefix=/usr/softinstall/ffmpeg --enable-gpl --enable-shared --enable-libx264

# 配置环境变量
vim /etc/profile
#配置如下
export FFMPEG_HOME=/usr/local/ffmpeg-4.1
export PATH=$FFMPEG_HOME/bin:$PATH
#修改完使用命令退出
~:wq
source /etc/profile
# 测试
ffmpeg -version
~~~~~~~~成功~~~~~~~~~

代码展示：
pom文件
pom.xml

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.5.4</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	
	<properties>
		<java.version>1.8</java.version>
		<javacv.version>1.5.4</javacv.version>
		<ffmpeg.version>4.3.1-1.5.4</ffmpeg.version>
	</properties>
	
	<dependencies>

		<dependency>
			<groupId>commons-lang</groupId>
			<artifactId>commons-lang</artifactId>
			<version>2.6</version>
		</dependency>

		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.2.2</version>
		</dependency>
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.5</version>
		</dependency>

		<!--web 模块 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<exclusions>
				<!--排除tomcat依赖 -->
				<exclusion>
					<artifactId>spring-boot-starter-tomcat</artifactId>
					<groupId>org.springframework.boot</groupId>
				</exclusion>
			</exclusions>
		</dependency>

		<!--undertow容器 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-undertow</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<!--      javacv 和 ffmpeg的依赖包      -->
		<dependency>
			<groupId>org.bytedeco</groupId>
			<artifactId>javacv</artifactId>
			<version>${javacv.version}</version>
			<exclusions>
				<exclusion>
					<groupId>org.bytedeco</groupId>
					<artifactId>*</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

		<dependency>
			<groupId>org.bytedeco</groupId>
			<artifactId>ffmpeg-platform</artifactId>
			<version>${ffmpeg.version}</version>
		</dependency>

		<dependency>
			<groupId>cn.hutool</groupId>
			<artifactId>hutool-all</artifactId>
			<version>5.6.5</version>
		</dependency>

		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.17</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		
		<dependency>
			<groupId>org.junit.vintage</groupId>
			<artifactId>junit-vintage-engine</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<exclusions>
				<exclusion>
					<groupId>org.springframework.boot</groupId>
					<artifactId>spring-boot-starter-tomcat</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-undertow</artifactId>
		</dependency>

		<dependency>
			<groupId>commons-codec</groupId>
			<artifactId>commons-codec</artifactId>
		</dependency>

		<dependency>
			<groupId>com.google.code.gson</groupId>
			<artifactId>gson</artifactId>
		</dependency>
	</dependencies>
	<build>
		<finalName>${project.artifactId}</finalName>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<executable>true</executable>
				</configuration>
			</plugin>
		</plugins>
	</build>

yml配置
application.yml

server:
  port: 8086

app:
  # 存储转码视频的文件夹
  video-folder: /root/FFmpeg/video_folder

spring:
  servlet:
    multipart:
      enabled: true
      # 不限制文件大小
      max-file-size: -1
      # 不限制请求体大小
      max-request-size: -1
      # 临时IO目录
      location: "${java.io.tmpdir}"
      # 不延迟解析
      resolve-lazily: false
      # 超过1Mb，就IO到临时目录
      file-size-threshold: 1MB
  web:
    resources:
      static-locations:
        - "classpath:/static/"
        - "file:${app.video-folder}" # 把视频文件夹目录，添加到静态资源目录列表

工具类
MediaInfo

import java.util.List;

import com.google.gson.annotations.SerializedName;

public class MediaInfo {
	public static class Format {
		@SerializedName("bit_rate")
		private String bitRate;
		public String getBitRate() {
			return bitRate;
		}
		public void setBitRate(String bitRate) {
			this.bitRate = bitRate;
		}
	}

	public static class Stream {
		@SerializedName("index")
		private int index;

		@SerializedName("codec_name")
		private String codecName;

		@SerializedName("codec_long_name")
		private String codecLongame;

		@SerializedName("profile")
		private String profile;
	}
	
	@SerializedName("streams")
	private List<Stream> streams;

	@SerializedName("format")
	private Format format;

	public List<Stream> getStreams() {
		return streams;
	}

	public void setStreams(List<Stream> streams) {
		this.streams = streams;
	}

	public Format getFormat() {
		return format;
	}

	public void setFormat(Format format) {
		this.format = format;
	}
}

TranscodeConfig

import lombok.Data;

@Data
public class TranscodeConfig {

	private String poster = "00:00:00.001";				// 截取封面的时间			HH:mm:ss.[SSS]
	private String tsSeconds = "15";			// ts分片大小，单位是秒
	private String cutStart;			// 视频裁剪，开始时间		HH:mm:ss.[SSS]
	private String cutEnd;				// 视频裁剪，结束时间		HH:mm:ss.[SSS]
	public String getPoster() {
		return poster;
	}

	public void setPoster(String poster) {
		this.poster = poster;
	}

	public String getTsSeconds() {
		return tsSeconds;
	}

	public void setTsSeconds(String tsSeconds) {
		this.tsSeconds = tsSeconds;
	}

	public String getCutStart() {
		return cutStart;
	}

	public void setCutStart(String cutStart) {
		this.cutStart = cutStart;
	}

	public String getCutEnd() {
		return cutEnd;
	}

	public void setCutEnd(String cutEnd) {
		this.cutEnd = cutEnd;
	}

	@Override
	public String toString() {
		return "TranscodeConfig [poster=" + poster + ", tsSeconds=" + tsSeconds + ", cutStart=" + cutStart + ", cutEnd="
				+ cutEnd + "]";
	}
}

FFmpegUtils

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.security.NoSuchAlgorithmException;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.*;

import javax.crypto.KeyGenerator;

import org.apache.commons.codec.binary.Hex;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.util.StringUtils;

import com.google.gson.Gson;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.multipart.MultipartFile;

public class FFmpegUtils {
	
	private static final Logger LOGGER = LoggerFactory.getLogger(FFmpegUtils.class);

	// 跨平台换行符
	private static final String LINE_SEPARATOR = System.getProperty("line.separator");

	/**
	 * 生成随机16个字节的AESKEY
	 * @return
	 */
	private static byte[] genAesKey ()  {
		try {
			KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
			keyGenerator.init(128);
			return keyGenerator.generateKey().getEncoded();
		} catch (NoSuchAlgorithmException e) {
			return null;
		}
	}
	
	/**
	 * 在指定的目录下生成key_info, key文件，返回key_info文件
	 * @param folder
	 * @throws IOException 
	 */
	private static Path genKeyInfo(String folder) throws IOException {
		// AES 密钥
		byte[] aesKey = genAesKey();
		// AES 向量
		String iv = Hex.encodeHexString(genAesKey());
		
		// key 文件写入
		Path keyFile = Paths.get(folder, "key");
		Files.write(keyFile, aesKey, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);

		// key_info 文件写入
		StringBuilder stringBuilder = new StringBuilder();
		stringBuilder.append("key").append(LINE_SEPARATOR);					// m3u8加载key文件网络路径
		stringBuilder.append(keyFile.toString()).append(LINE_SEPARATOR);	// FFmeg加载key_info文件路径
		stringBuilder.append(iv);											// ASE 向量
		
		Path keyInfo = Paths.get(folder, "key_info");
		
		Files.write(keyInfo, stringBuilder.toString().getBytes(), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
		
		return keyInfo;
	}
	
	/**
	 * 指定的目录下生成 master index.m3u8 文件
	 * @param file			master m3u8文件地址
	 * @param indexPath			访问子index.m3u8的路径
	 * @param bandWidth			流码率
	 * @throws IOException
	 */
	private static void genIndex(String file, String indexPath, String bandWidth) throws IOException {
		StringBuilder stringBuilder = new StringBuilder();
		stringBuilder.append("#EXTM3U").append(LINE_SEPARATOR);
		stringBuilder.append("#EXT-X-STREAM-INF:BANDWIDTH=" + bandWidth).append(LINE_SEPARATOR);  // 码率
		stringBuilder.append(indexPath);
		Files.write(Paths.get(file), stringBuilder.toString().getBytes(StandardCharsets.UTF_8), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
	}
	
	/**
	 * 转码视频为m3u8
	 * @param source				源视频
	 * @param destFolder			目标文件夹
	 * @param config				配置信息
	 * @throws IOException 
	 * @throws InterruptedException 
	 */
	public static void transcodeToM3u8(String source, String destFolder, TranscodeConfig config) throws IOException, InterruptedException {
		
		// 判断源视频是否存在
		if (!Files.exists(Paths.get(source))) {
			throw new IllegalArgumentException("文件不存在：" + source);
		}
		
		// 创建工作目录
		Path workDir = Paths.get(destFolder, "ts");
		Files.createDirectories(workDir);
		
		// 在工作目录生成KeyInfo文件
		Path keyInfo = genKeyInfo(workDir.toString());
		
		// 构建命令
		List<String> commands = new ArrayList<>();
		commands.add("ffmpeg");
		commands.add("-i")						;commands.add(source);					// 源文件
		commands.add("-c:v")					;commands.add("libx264");				// 视频编码为H264
		commands.add("-c:a")					;commands.add("copy");					// 音频直接copy
		commands.add("-hls_key_info_file")		;commands.add(keyInfo.toString());		// 指定密钥文件路径
		commands.add("-hls_time")				;commands.add(config.getTsSeconds());	// ts切片大小
		commands.add("-hls_playlist_type")		;commands.add("vod");					// 点播模式
		commands.add("-hls_segment_filename")	;commands.add("%06d.ts");				// ts切片文件名称
		
		if (StringUtils.hasText(config.getCutStart())) {
			commands.add("-ss")					;commands.add(config.getCutStart());	// 开始时间
		}
		if (StringUtils.hasText(config.getCutEnd())) {
			commands.add("-to")					;commands.add(config.getCutEnd());		// 结束时间
		}
		commands.add("index.m3u8");														// 生成m3u8文件
		
		// 构建进程
		Process process = new ProcessBuilder()
			.command(commands)
			.directory(workDir.toFile())
			.start()
			;
		
		// 读取进程标准输出
		new Thread(() -> {
			try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
				String line = null;
				while ((line = bufferedReader.readLine()) != null) {
					LOGGER.info(line);
				}
			} catch (IOException e) {
			}
		}).start();
		
		// 读取进程异常输出
		new Thread(() -> {
			try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {
				String line = null;
				while ((line = bufferedReader.readLine()) != null) {
					LOGGER.info(line);
				}
			} catch (IOException e) {
			}
		}).start();
		
		
		// 阻塞直到任务结束
		if (process.waitFor() != 0) {
			throw new RuntimeException("视频切片异常");
		}
		
		// 切出封面
		if (!screenShots(source, String.join(File.separator, destFolder, "poster.jpg"), config.getPoster())) {
			throw new RuntimeException("封面截取异常");
		}

		// 获取视频信息
		final MediaInfo[] mediaInfo = {getMediaInfo(source)};
		if (mediaInfo[0] == null) {
			throw new RuntimeException("获取媒体信息异常");
		}

		// 生成index.m3u8文件
		genIndex(String.join(File.separator, destFolder, "index.m3u8"), "ts/index.m3u8", mediaInfo[0].getFormat().getBitRate());
		
		// 删除keyInfo文件
		Files.delete(keyInfo);
	}
	
	/**
	 * 获取视频文件的媒体信息
	 * @param source
	 * @return
	 * @throws IOException
	 * @throws InterruptedException
	 */
	public static MediaInfo getMediaInfo(String source) throws IOException, InterruptedException {
		List<String> commands = new ArrayList<>();
		commands.add("ffprobe");	
		commands.add("-i")				;commands.add(source);
		commands.add("-show_format");
		commands.add("-show_streams");
		commands.add("-print_format")	;commands.add("json");
		
		Process process = new ProcessBuilder(commands)
				.start();
		 
		MediaInfo mediaInfo = null;

		try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
			mediaInfo = new Gson().fromJson(bufferedReader, MediaInfo.class);
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		if (process.waitFor() != 0) {
			return null;
		}
		
		return mediaInfo;
	}
	
	/**
	 * 截取视频的指定时间帧，生成图片文件
	 * @param source		源文件
	 * @param file			图片文件
	 * @param time			截图时间 HH:mm:ss.[SSS]		
	 * @throws IOException 
	 * @throws InterruptedException 
	 */
	public static boolean screenShots(String source, String file, String time) throws IOException, InterruptedException {
		
		List<String> commands = new ArrayList<>();
		commands.add("ffmpeg");
		commands.add("-i")				;commands.add(source);
		commands.add("-ss")				;commands.add(time);
		commands.add("-y");
		commands.add("-q:v")			;commands.add("1");
		commands.add("-frames:v")		;commands.add("1");
		commands.add("-f");				;commands.add("image2");
		commands.add(file);

		Process process = new ProcessBuilder(commands)
					.start();
		
		// 读取进程标准输出
		new Thread(() -> {
			try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
				String line = null;
				while ((line = bufferedReader.readLine()) != null) {
					LOGGER.info(line);
				}
			} catch (IOException e) {
			}
		}).start();
		
		// 读取进程异常输出
		new Thread(() -> {
			try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {
				String line = null;
				while ((line = bufferedReader.readLine()) != null) {
					LOGGER.error(line);
				}
			} catch (IOException e) {
			}
		}).start();
		
		return process.waitFor() == 0;
	}
}

controller调用
UploadController

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import com.demo.ffmpeg.FFmpegUtils;
import com.demo.ffmpeg.TranscodeConfig;

@RestController
@RequestMapping("/uploadController")
public class UploadController {
	
	@Value("${app.video-folder}")
	private String videoFolder;

	private Path tempDir = Paths.get(System.getProperty("java.io.tmpdir"));

	/**
	 * 上传视频进行切片处理，返回访问路径
	 * @param video
	 * @param transcodeConfig
	 * @return
	 * @throws IOException 
	 */
	@PostMapping("/upload")
	@CrossOrigin
	public Object upload (@RequestPart(name = "file", required = true) MultipartFile video,
						@RequestPart(name = "config", required = true) TranscodeConfig transcodeConfig) throws IOException {
		/**    参数传UUID去数据库查询需要转换的视频地址 进行入参
		public ResponseData upload (@RequestParam("uuid") String uuid) throws Exception {
			TranscodeConfig transcodeConfig = new TranscodeConfig();
	        FastDfsFile fastDfsFile = sectionService.getSectionByUUID(uuid);
	        if(fastDfsFile.getFastDfsFileUrl() == null){
	            LOGGER.info("请上传视频！！");
	            return ResponseData.warnWithMsg("请选择要上传的视频！");
	        }
	
	        MultipartFile video = UrlToMultipartFile.urlToMultipartFile(fastDfsFile.getFastDfsFileUrl());
		*/
LOGGER.info("文件信息：title={}, size={}", video.getOriginalFilename(), video.getSize());
		LOGGER.info("转码配置：{}", transcodeConfig);

		// 原始文件名称，也就是视频的标题
		String title = video.getOriginalFilename();

		// io到临时文件
		Path tempFile = tempDir.resolve(title);
		LOGGER.info("io到临时文件：{}", tempFile.toString());

		try {
			video.transferTo(tempFile);
			
			// 删除后缀
			title = title.substring(0, title.lastIndexOf(".")) + "-" + UUID.randomUUID().toString().replaceAll("-", "");

			// 按照日期生成子目录
			String today = DateTimeFormatter.ofPattern("yyyyMMdd").format(LocalDate.now());

			// 尝试创建视频目录
			Path targetFolder = Files.createDirectories(Paths.get(videoFolder, today, title));

			LOGGER.info("创建文件夹目录：{}", targetFolder);
			Files.createDirectories(targetFolder);

			// 执行转码操作
			LOGGER.info("开始转码");
			try {
				transcodeToM3u8(tempFile.toString(), targetFolder.toString(), transcodeConfig);
			} catch (Exception e) {
				LOGGER.error("转码异常：{}", e.getMessage());
				Map<String, Object> result = new HashMap<>();
				result.put("success", false);
				result.put("message", e.getMessage());
				return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(result);
			}

			// 封装结果
			Map<String, Object> videoInfo = new HashMap<>();
			videoInfo.put("title", title);
			videoInfo.put("m3u8", String.join("/", "", today, title, "index.m3u8"));
			videoInfo.put("poster", String.join("/", "", today, title, "poster.jpg"));

			//返回数据
			Map<String, Object> result = new HashMap<>();
			result.put("success", true);
			result.put("data", videoInfo);
			return result;
		} finally {
			// 始终删除临时文件
			Files.delete(tempFile);
		}
	}
}

Url转换MultipartFile的工具类
如controller中参数传的是URL 使用以下工具类转换一下即可
UrlToMultipartFile

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.lang.RandomStringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class UrlToMultipartFile {

    private static final Logger LOGGER = LoggerFactory.getLogger(UrlToMultipartFile.class);

    /**
     * inputStream 转 File
     */
    public static File inputStreamToFile(InputStream ins, String name) throws Exception{
        //System.getProperty("java.io.tmpdir")临时目录+File.separator目录中间的间隔符+文件名
        File file = new File(System.getProperty("java.io.tmpdir") + File.separator + name);
        OutputStream os = new FileOutputStream(file);
        int bytesRead;
        int len = 8192;
        byte[] buffer = new byte[len];
        while ((bytesRead = ins.read(buffer, 0, len)) != -1) {
            os.write(buffer, 0, bytesRead);
        }
        os.close();
        ins.close();
        return file;
    }

    /**
     * file转multipartFile
     */
    public static MultipartFile fileToMultipartFile(File file) {
        FileItemFactory factory = new DiskFileItemFactory(16, null);
        FileItem item=factory.createItem(file.getName(),"text/plain",true,file.getName());
        int bytesRead = 0;
        byte[] buffer = new byte[8192];
        try {
            FileInputStream fis = new FileInputStream(file);
            OutputStream os = item.getOutputStream();
            while ((bytesRead = fis.read(buffer, 0, 8192)) != -1) {
                os.write(buffer, 0, bytesRead);
            }
            os.close();
            fis.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new CommonsMultipartFile(item);
    }

    //url转MultipartFile
    public static MultipartFile urlToMultipartFile(String url) throws Exception {
        File file = null;
        MultipartFile multipartFile = null;
        try {
            HttpURLConnection httpUrl = (HttpURLConnection) new URL(url).openConnection();
            httpUrl.connect();
            file = UrlToMultipartFile.inputStreamToFile(httpUrl.getInputStream(),RandomStringUtils.randomAlphanumeric(8)+".mp4");
            LOGGER.info("---------"+file+"-------------");

            multipartFile = UrlToMultipartFile.fileToMultipartFile(file);
            httpUrl.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return multipartFile;
    }

}