ffmpeg -hide_banner -nostdin -vsync vfr -i botw-1-archive.mkv -vf "mpdecimate=frac=0.01,pp=ac,scale=w=min(iw\,1280):-4" -c:a libmp3lame -q:a 2 -c:v libx264 -preset veryslow -crf 24 -max_muxing_queue_size 99999 -movflags +faststart the.mp4

                    -vsync vfr :: try to prevent video/audio desync
         -i botw-1-archive.mkv :: input file
                           -vf :: video filter chain
          mpdecimate=frac=0.01 :: remove duplicate frames; better quality
                         pp=ac :: slight denoise / deblock
      scale=w=min(iw\,1280):-4 :: shrink video if wider than 1280px
               -c:a libmp3lame :: mp3 should work everywhere
                        -q:a 2 :: audio at about 192 kbps
                  -c:v libx264 :: the most popular codec for mp4
              -preset veryslow :: can also use "slower" or "slow"
                       -crf 24 :: higher value = smaller file
  -max_muxing_queue_size 99999 :: bug workaround
          -movflags +faststart :: less chance of corruption
                       the.mp4 :: output file