How to upscale Touhou games for YouTube (1440p@60fps) [Description]

This is my personal method for encoding Touhou gameplay. Take this with a grain of salt. This is meant to show how youtube treats video, from now on, this is how I will upload videos. For anyone interested on the process: 1. Take video at 480p, H.256, a CRF of 10 is enough but if you have the storage, go lossless, but personally, I have found that a CRF of 10 has barely any difference other than almost invisible noise. The following x264 options are recommended: aq-strength=1.3 psy-rd=1.0:0.2 deblock=-1:-1 partitions=p4x4 ref=8 keyint=30 bframes=2 2. Encode the resulting video with FFMPEG with the following command: ffmpeg -i input.mkv -sws_flags neighbor -vf scale=1920:1440 -crf 22 -c:a copy -preset medium -x264-params aq-strength=1.3:psy-rd=1.0,0.2:deblock=-1,-1:partitions=p4x4:refs=8:keyint=30:bframes=2 output.mkv Where input.mkv and output.mkv are the input and output filenames. If you want to upscale to 4k go ahead (2880:2160), however, I would also use another scaling method, or do it in 2 phases (Using nearest neighbor to upscale to 3200x2400 and then lanczos (or whatever you want really, you should test this first instead) to downscale to 2880x2160, or otherwise, upscale to 2560x1920 using nearest neighbor and whatever you want to upscale it to 2880x2160(with proper testing, of course)), also you should consider using a higher CRF value (24 maybe?) I have found that a CRF of 22 is enough for Youtube guidelines on 1440p@60fps touhou gameplay, a value of 20 would be...