package com.face;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;


public class videoCmd {
    private BufferedReader reader;
    public void exe(){
        try {
            String ffmpegPath = "D:\\program\\ffmpeg\\ffmpeg-4.3.1-2021-01-01-essentials_build\\bin\\ffmpeg.exe";
            // 执行tail -f命令
            Process process = Runtime.getRuntime().exec( ffmpegPath + " -ss 0:05 -i e:/20211223123223_76639ced-6400-11ec-b8f9-fa163e4e1e9f.mp4 -t 10 -c:v copy -c:a copy e:/555.mp4 ");
            InputStream inputStream = process.getInputStream();

//            // 一定要启动新的线程，防止InputStream阻塞处理WebSocket的线程
            TailLogThread thread = new TailLogThread(inputStream);
            thread.start();

        } catch (IOException e) {
            e.printStackTrace();

        }
    }
    public static void main(String[] args) {
       new videoCmd().exe();
    }

    class  TailLogThread extends Thread {
        private BufferedReader reader;

        public TailLogThread(InputStream in) {
            this.reader = new BufferedReader(new InputStreamReader(in));
        }

        @Override
        public void run() {
            String line;
            try {
                while((line = reader.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if(reader != null){
                    try {
                        reader.close();
                    } catch (Exception e){
                        e.printStackTrace();
                    }

                }
            }
        }
    }
}