They claim that a 4K video coming into their site should optimally be 35~45Mbps when encoded with the older x264 codecs. Then I recently read YouTubes suggest guidelines for bitrates. That way I know I should never be disappointed. Therefore I played it safe, bump it down a notch and just encode all of my stuff with x265 10-bit at CRF of 20 on Slow preset. Through some experimentation I found that I personally never can really see a difference between anything lower than 22 using a Slow present. It states that for 4K videos with x265 they suggest a Constant Rate Factor (CRF) encoding in the range of 22-28 (the larger the number the lower the quality). In the past, I went straight to Handbrake’s documentation. I mainly use Handbrake now use ffmpeg because I learned Handbrake only has a 8-bit internal pipeline. I want a setting that I can use on any incoming 4K HDR video I buy. The honest to god true answer is “it depends”, however I find that answer unsuitable for my own needs. What are the best settings for me to use when encoding x265 videos?
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