![]() The only setting that has good generic properties outside that is imo no-sao (that setting alone or with deblock -1,-1 and no-strong-intra-smoothing could be looked at something as x264 tune film), but again, if you are compressing animation, you might not wanna use these settings anyway. X265 is already tuned for 4k by deafault, so it doesnt need much tweeking outside the presets. ![]() But you need to decide (and probably test) if it worth the trade off for you. I find slow to be worth the speed trade off, its imo the the preset that offers the best compression without going in too deep in the diminishing return territory. It also very source dependent, very high quality 4k sources or grainy sources might break your bitrate budget when using say 18-19, and you might need to go towards CRF 20-22 (which has been the case for me when compressing stuff from DI-sources). Just try different CRF-values until you find a compression ratio that you are comfortable with. What exactly is your question? What CRF value you should choose or if medium or slow is the best are stuff only you can answer, we dont know your compression ratio target or speed requirements. Apart from that, these forums arnt really that great for these types of generic questions, cause, the answer you will get it is: it depends. I think the reason why no one has responded here is because this is something that comes up alot, and there are plenty of threads here for you to look at to gather the information you are asking for.
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