这篇文章主要讲解了“怎么用SpringBoot + FFmpeg实现一个简单的M3U8切片转码系统”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“怎么用SpringBoot + FFmpeg实现一个简单的M3U8切片转码系统”吧！
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想法
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。 服务器可以对视频做一些简单的处理，例如裁剪，封面的截取时间。
视频转码文件夹的定义
喜羊羊与灰太狼 // 文件夹名称就是视频标题
|-index.m3u8 // 主m3u8文件，里面可以配置多个码率的播放地址
|-poster.jpg // 截取的封面图片
|-ts // 切片目录
|-index.m3u8 // 切片播放索引
|-key // 播放需要解密的AES KEY
实现
需要先在本机安装FFmpeg，并且添加到PATH环境变量，如果不会先通过搜索引擎找找资料
工程
pom
4.0.0
com.demo
demo
0.0.1-SNAPSHOT
org.springframework.boot
spring-boot-starter-parent
2.4.5
org.springframework.boot
spring-boot-starter-test
test
org.junit.vintage
junit-vintage-engine
test
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-tomcat
org.springframework.boot
spring-boot-starter-undertow
commons-codec
commons-codec
com.google.code.gson
gson
${project.artifactId}
org.springframework.boot
spring-boot-maven-plugin
true
配置文件
server:
port: 80
app:
# 存储转码视频的文件夹地址
video-folder: "C:\\Users\\Administrator\\Desktop\\tmp"
spring:
servlet:
multipart:
enabled: true
# 不限制文件大小
max-file-size: -1
# 不限制请求体大小
max-request-size: -1
# 临时IO目录
location: "${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TranscodeConfig，用于控制转码的一些参数
package com.demo.ffmpeg;
public class TranscodeConfig {
private String poster; // 截取封面的时间 HH:mm:ss.[SSS]
private String tsSeconds; // 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 + "]";
}
}MediaInfo，封装视频的一些基础信息
package com.demo.ffmpeg;
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 streams;
@SerializedName("format")
private Format format;
public List getStreams() {
return streams;
}
public void setStreams(List streams) {
this.streams = streams;
}
public Format getFormat() {
return format;
}
public void setFormat(Format format) {
this.format = format;
}
}FFmpegUtils，工具类封装FFmpeg的一些操作
package com.demo.ffmpeg;
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.util.ArrayList;
import java.util.List;
import javax.crypto.KeyGenerator;
import org.apache.commons.codec.binary.Hex;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
import com.google.gson.Gson;
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 fileName 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 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
MediaInfo mediaInfo = getMediaInfo(source);
if (mediaInfo == 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.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 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 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;
}
}UploadController，执行转码操作
package com.demo.web.controller;
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 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.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.demo.ffmpeg.FFmpegUtils;
import com.demo.ffmpeg.TranscodeConfig;
@RestController
@RequestMapping("/upload")
public class UploadController {
private static final Logger LOGGER = LoggerFactory.getLogger(UploadController.class);
@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
public Object upload (@RequestPart(name = "file", required = true) MultipartFile video,
@RequestPart(name = "config", required = true) TranscodeConfig transcodeConfig) throws IOException {
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("."));
// 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 {
FFmpegUtils.transcodeToM3u8(tempFile.toString(), targetFolder.toString(), transcodeConfig);
} catch (Exception e) {
LOGGER.error("转码异常：{}", e.getMessage());
Map 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 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"));
Map 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);
}
}
}index.html，客户端
Title
选择转码文件：
