: 
;ٵװУִ
÷ģʹ{input}{output}ļļȻϷļִ
    {input}  ÿļ·+ļ
    {output} ÿļļȥչļչģ 
      d:\work\input.mp4
            {input} = d:\work\input.mp4
            {output} = input
          d:\work\input.ý
            {input} = d:\work\input.ý
            {output} = input.ý
    ļ·Ǹݽϵ趨Զƴӵġվļ·        
ص㣺
    1,ļʱԷֿд磺ͬʱѹ8Ƶ 
    2,ļ·ǰӺţŸִСѭϷŴʱͷ۵û
    3,.netwindows XP/7/8/8.1/10
    4,ݿ滻ʹffmpeg/cwebp/x264/wget/curl/grep ,ֻҪָȷˡ
 
