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WebRTC系列-H.264预估码率计算
2022-07-06 07:40:00 【简简单单lym】
编码视频时应该使用什么比特率,在设备编码器的参数中尤为重要,因为这关系编码后的视频质量,本文将介绍两种计算方式,普通直接预估值以及 The Kush Gauge ,后者将是本次的重点介绍内容;
1. 普通计算方式
WebRTC源码中对视频的编码数据最终处理都是I420数据,由此可知一帧未编码的数据的大小是:
width x height x 1.5 这里的单位是字节,例如:6404801.5 = 460,800Byte ;H.264
(VBR下)一般的压缩比一般能达到1:50甚至1:100以上,按照640 480 @ 15fps的计算:
640*480*15*1.5*8/100/1000=552.96kbps
;640*480*15*1.5*8/50/1000=
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