I have used AVI Jpeg, AVI raw, FFmpeg Video, with Matroska, Mpeg4, with H.264 and Webm, at the highest bitrates samples, ect from a 4k png strip, and they never increase in quality. The uploaded images are stills from the png strip (left) and from the highest possible quality video I could render (right).
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$\begingroup$ Hello and welcome. Please don't post the same question multiple times. Instead edit your original question and it will be bumped back into active questions. It helps to include as much info as possible. Try giving a closer screenshot of what you consider to be the problem. $\endgroup$ – Allen Simpson Mar 5 at 1:29