this post was submitted on 06 Jan 2024
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thanks, I'll try out the libx264 encoder next time
A couple other things, you generally want to do pixel format conversion before the codec, is specified. You should be able to get satisfactory results with
ffmpeg -i input.mpv -pix_fmt yuv420p -c:v libx264 -preset medium -crf 24 -c:a aac output.mp4
Play with preset a bit since that is where your Quality/Compression : Speed ratio comes in, CRF is the quality it handles. So you set CRF for a ballpark quality you want, then change the preset, slower = higher compression, faster = lower compression.you can find more info here https://trac.ffmpeg.org/wiki/Encode/H.264#a2.Chooseapresetandtune but generally you don't need to muck about with profiles or tunes or anything else
You're probably aware already, but others reading this might be interested that you can access the same format conversion with Handbrake and WinFF if you prefer GUI tools. Remember your settings once and save them as a preset.