The emulator is divided into three parts
1、Trace of video source:
This Trace contains the time and size of each frame captured on the transcoding server and CDN to reach the CDN. The format is:
|Timestamp（s）||Frame Data size(bit)||Is_I_frame_flag( 0/ 1)|
Among them, the meaning of Is_I_frame_flag is: a CHUNK or GOP is composed of an I frame and an infinite number of P frames, where I frame must be on the boundary of CHUNK or Gop, and the bit rate can be switched only on the boundary.
The network information of some mobile phones in wifi and LTE is collected, mainly simulating the network status under strong network, medium network and weak network. The format is: