采用VLC进行转码

点击媒体，下拉菜单选择:转换/保存(R)

Tab文件页面，添加视频源

点击转换(O)/保存按钮，配置文件中选择Video - H.264 + MP3(MP4)

点击浏览，选择文件夹，输入文件名称

知识扩展:

The brand ‘mp41’ is defined as identifying version 1 of this specification (ISO/IEC 14496-1:2001), and the brand ‘mp42’ identifies this version of the specification;  at least one of these brands shall appear in the compatible-brands list in the file-type box, in all files conforming to this specification.