Quote:
Originally Posted by benwaggoner
Of course, no one actually needs or wants fixed QP encoding! Rate control and adaptive quantization are key features that make encoders good. Fixed QP is really only seen in JPEG images and in early stage codec testing before rate control is implemented.
It's honestly kind of dumb that we keep designing codecs with an implicit bias for fixed QP delivering optimal PSNR, which are things that don't correlate particuarly well with human vision.
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Isn't it valid (if not wasteful) to do your own brute force rate control by doing per-scene adaptive fixed QP encoding? This is precisely the technique Netflix outlined for optimized VP9 encoding. In theory it sounds like a great solution, just hugely expensive
https://netflixtechblog.com/optimize...g-4b9464204830