There is also a new FaceTime camera, which can stream video in 720p resolution and display it in a new widescreen format.
同样，新系列搭载了FaceTime摄像头，可以拍摄720P录像，并且可以用宽屏格式播放。
When video stream transmitted between different networks, Media Gateway must implement video stream format conversion, protocol process, and resource control.
在异构网络间进行视频通信时，需要通过媒体网关对视频流进行格式转换、协议处理、资源控制。
As is well known, pure video stream only can be played orderly, and can't be random accessed or played in network. File format is designed to solve these problems.
视频流本身只能顺序播放，不能进行随机访问和网络流化播放，文件封装则是为解决这些问题而设计的。
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