Webrtc series-h.264 estimated bit rate calculation

What bit rate should be used when encoding video , It is particularly important in the parameters of the equipment encoder , Because this is related to the quality of the encoded video , This article will introduce two calculation methods , General direct estimates and The Kush Gauge , The latter will be the focus of this presentation ;

1. General calculation method

WebRTC The final processing of video coding data in the source code is I420 data , It can be seen that the size of a frame of uncoded data is ：
width x height x 1.5 The unit here is byte , for example ：6404801.5 = 460,800Byte ;
H.264 (VBR Next ) The general compression ratio can generally reach 1：50 even to the extent that 1：100 above , according to 640 480 @ 15fps The calculation of ：

• 640*480*15*1.5*8/100/1000=552.96kbps;
• 640*480*15*1.5*8/50/1000=