java ProcessBuilder调用cmd命令

String ffmpeg  = "D: & cd D:\JavaOption\ffmpeg-4.3.1-full_build\bin & ffmpeg -i d:\11.mkv -map 0:s:0 sub11.srt";
List<String> cmdList = new ArrayList<>();
			cmdList.add("cmd");
			cmdList.add("/c");
			cmdList.add(ffmpeg  );

			ProcessBuilder pb = new ProcessBuilder(cmdList);
			pb.redirectErrorStream(true);
			Process process = pb.start();
			readProcessOutput(process.getInputStream(), System.out);
			int state = process.exitValue();
			System.out.println(state);
			System.out.println("ok");

注意
1、String ffmpeg 有第三条命令(每条命令用 & 链接)
不能分开 cmdList.add()三次
即 不能采用下面这种调用方法

cmdList.add("d:");
cmdList.add("cd D:\JavaOption\ffmpeg-4.3.1-full_build\bin");
cmdList.add("ffmpeg -i d:\11.mkv -map 0:s:0 sub11.srt");

如果分开add 会导致无法正确执行。

2、输出返回结果乱码解决方案
InputStreamReader 第二个参数设置为gbk

private static void readProcessOutput(InputStream inputStream, PrintStream out) {
		try {
			BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("GBK")));
			String line;
			while ((line = reader.readLine()) != null) {
				System.out.println(line);
			}
			System.out.println("-end");
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				inputStream.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

输出结果如图