不用我们安装FFmpeg，项目自动依赖ffmpeg，已经有开源实现：https://github.com/a-schild/jave2

下面的代码基于：3.1.1 version

maven坐标：

<dependency>
 <groupId>ws.schild</groupId>
 <artifactId>jave-all-deps</artifactId>
 <version>3.1.1</version>
</dependency>

java代码：

DefaultFFMPEGLocator defaultFFMPEGLocator = new DefaultFFMPEGLocator();
ProcessWrapper processWrapper = defaultFFMPEGLocator.createExecutor();

//你需要的自定义的FFmpeg原生命令（比如mp4 转 mp3：ffmpeg -i foo.mp4 foobar.mp3）......
processWrapper.addArgument("ffmpeg -i foo.mp4 foobar.mp3");

//destroyOnRuntimeShutdown表示是否立即关闭Runtime
//如果ffmpeg命令需要长时间执行，destroyOnRuntimeShutdown = false

//openIOStreams表示是不是需要打开输入输出流:
//       inputStream = processWrapper.getInputStream();
//       outputStream = processWrapper.getOutputStream();
//       errorStream = processWrapper.getErrorStream();

//processWrapper.execute() 默认: processWrapper.execute(true,true)
processWrapper.execute(boolean destroyOnRuntimeShutdown, boolean openIOStreams);

//是否执行完毕
int exitCode = processWrapper.getProcessExitCode()

//执行完毕，关闭
processWrapper.destroy();

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