(MPEG-4 Video File)
m4v 是苹果开发的 mpeg-4 文件扩展名, 可与 mp4 相媲美。它对苹果 itunes 商店的电影或视频进行编码。m4v 和 mp4 的区别在于, m4v 受到保护, 如果有人在他的电脑里有 itunes 许可证, 就可以玩。
M4V is Apple developed MPEG-4 file extension that is comparable to MP4. It encodes the movies or videos from Apple iTunes store. The difference between M4V and MP4 is that M4V is protected and it can be played if anyone has a license iTunes in his computer.