针对Linux环境下如何安装ffmpeg请看上一篇文章Linux上搭建并使用ffmpeg（Java）-CSDN博客
public static void voiceChangeFormat(String localPath, String targetPath) {List<String> command = new ArrayList<>();command.add("ffmpeg");command.add("-i");command.add(localPath);command.add("-ar");command.add("8000");command.add("-ab");command.add("12.2k");command.add("-ac");command.add("1");command.add(targetPath);commandStart(command);}/*** 调用命令行执行** @param command 命令行参数*/public static void commandStart(List<String> command) {command.forEach(v -> System.out.print(v + " "));System.out.println();System.out.println();ProcessBuilder builder = new ProcessBuilder();//正常信息和错误信息合并输出builder.redirectErrorStream(true);builder.command(command);//开始执行命令Process process = null;try {process = builder.start();//如果你想获取到执行完后的信息，那么下面的代码也是需要的String line = "";BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));while ((line = br.readLine()) != null) {System.out.println(line);}} catch (IOException e) {e.printStackTrace();}})
)
