承接上文。

【拓展】

有人问我，怎么配置互联网环境的Mevan，这里拓展一下。

settings_outweb.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">

继续正题，上篇咱们讲到 使用命令可以完成一系列的操作

1、视频格式转换：ffmpeg -i 123.mp4 newVideo.avi

**2、视频分段：ffmpeg -i 80s.mp4 -c:v libx264 -c:a aac -strict -2 -f hls -hls_list_size 0 -hls_time 60 output/output.m3u8

**3、音视频合并：ffmpeg -i test2.mp3 -i test1.mp4 -t 10 -y newVideo.mp4

等等，详见官方文档

《英文版的哦》

其实，这里只是做了一点，使用Java执行上述命令。

【ffmpeg与Java实现视频转换小demo】

package com.example.demo;

import org.assertj.core.util.Lists;

import org.junit.Test;

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.List;

public class MediaUtil {

/**

* 简易视频处理 -- (cmd(windows): ffmpeg.exe -i test1.mp4 newVideo.avi)

*

* @param ffmpegPath ffmpeg.exe文件路径，可在rest或者admin中进行配置，使用配置文件进行读取

* @param videoInputPath 视频文件路径(输入)

* @param videoOutputPath 转换完成的文件路径(输出)

* @throws Exception

*/

public static void videoConvert(String ffmpegPath, String videoInputPath, String videoOutputPath) throws Exception {

// 构建命令

List command = Lists.newArrayList();

command.add(ffmpegPath);

command.add("-i");

command.add(videoInputPath);

command.add(videoOutputPath);

// 执行操作

ProcessBuilder builder = new ProcessBuilder(command);

Process process = builder.start();

InputStream errorStream = process.getErrorStream();

InputStreamReader isr = new InputStreamReader(errorStream);

BufferedReader br = new BufferedReader(isr);

String line = "";

while ((line = br.readLine()) != null) {

}

if (br != null) {

br.close();

}

if (isr != null) {

isr.close();

}

if (errorStream != null) {

errorStream.close();

}

}

@Test

public void testVideoConvert() {

String ffmpegPath = "ffmpeg";

String videoInputPath = "D:\\Frozen\\frozen_nb\\video\\realvideo\\123.mp4";

String videoOutputPath = "D:\\Frozen\\frozen_nb\\video\\realvideo\\newVideo.avi";

//fmpegProperties ffmpegProperties = SpringContextHolder.getBean(FfmpegProperties.class);

//ffmpegProperties.getFfmpegFile()

try {

videoConvert(ffmpegPath, videoInputPath, videoOutputPath);

} catch (Exception e) {

e.printStackTrace();

}

}

}

漫长的等待其转换完成......

5分多钟，视频终于转换完成了

播放正常

【再来一个小demo】

/**

* 获取第一秒第一帧的缩略图 -- (cmd(windows): ffmpeg.exe -ss 00:00:01 -y -i test1.mp4 -vframes 1 new.jpg)

*

* @param ffmpegPath ffmpeg.exe文件路径，可在rest或者admin中进行配置，使用配置文件进行读取

* @param videoInputPath 视频文件路径(输入)

* @param coverOutputPath 缩略图输出路径

* @throws Exception

*/

public static void getVideoCover(String ffmpegPath, String videoInputPath, String coverOutputPath) throws Exception {

// 构建命令

List command = Lists.newArrayList();

command.add(ffmpegPath);

command.add("-ss");

command.add("00:45:22");

command.add("-y");

command.add("-i");

command.add(videoInputPath);

command.add("-vframes");

command.add("1");

command.add(coverOutputPath);

// 执行操作

ProcessBuilder builder = new ProcessBuilder(command);

Process process = builder.start();

InputStream errorStream = process.getErrorStream();

InputStreamReader isr = new InputStreamReader(errorStream);

BufferedReader br = new BufferedReader(isr);

String line = "";

while ((line = br.readLine()) != null) {

}

if (br != null) {

br.close();

}

if (isr != null) {

isr.close();

}

if (errorStream != null) {

errorStream.close();

}

}

@Test

public void testGetVideoCover() {

String videoInputPath = "D:\\Frozen\\frozen_nb\\video\\realvideo\\123.mp4";

String videoOutputPath = "D:\\Frozen\\frozen_nb\\video\\realvideo\\frozen.jpg";

try {

getVideoCover("ffmpeg", videoInputPath, videoOutputPath);

} catch (Exception e) {

e.printStackTrace();

}

}