这是一个用ffmpeg编写的播放器,可以播放mp4格式的文件.适合ffmpeg的初学者.能够掌握使用ffmpeg开源的步骤-This is a player with ffmpeg written, can play mp4 format. For ffmpeg for beginners. Be able to master the steps using the open source ffmpeg

阅读您的文件包然后写出其具体功能(至少要20个字)。-Read your paper bag and then write their specific functions (at least 20 words).