Understanding Rate Control Modes (x264, x265, vpx)
What is “rate control”? It’s what a video encoder does when it decides how many bits to spend for a given frame. The goal of (lossy) video encoding is to save as many bits as possible, reducing the file size over the original input file, while retaining as much quality as possible. Rate control is a crucial step in determining that tradeoff between size and quality. Rate control comes in many form
CRF Guide (Constant Rate Factor in x264, x265 and libvpx)
What is the Constant Rate Factor? The Constant Rate Factor (CRF) is the default quality (and rate control) setting for the x264 and x265 encoders, and it’s also available for libvpx. With x264 and x265, you can set the values between 0 and 51, where lower values would result in better quality, at the expense of higher file sizes. Higher values mean more compression, but at some point you will noti
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