CBR

       ffmpeg -i in.flv \
        -vf scale=1280:720 -profile:v baseline -c:v libx264 -b:v 2000k  -bufsize 4000k -maxrate 2300k \
        -r 24 -keyint_min 48 -g 48 -sc_threshold 0 -nal-hrd cbr -x264-params "no-scenecut=1:threads=8" -c:a copy -f flv high.flv

zhangbin@LAPTOP-F1POBCSR MINGW64 /g/LAS/las/transcode (master)
$