Added MobileOptions to reduce mobile APP bandwidth

Added

Version 841, for b80

Version 792, for b70

Purpose

To reduce bandwidth usage, a protocol option is added to NVR server to reduce network usage by transmitting only I-frames at a specified interval, such as 5 seconds. This will keep the video frame updating, without consuming too much bandwidth. This is especially useful when video packets are transmitted over mobile Internet such as 3G mobile network.

Usage

This function is used automatically when mobile APP uses video list view.