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Webrtc series-h.264 estimated bit rate calculation
2022-07-06 07:46:00 【Simple lym】
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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=
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