Error

 C:\mpv\mpv.exe "C:\ffmpeg\Cowbop Bebop -01.mkv" -o "C:\ffmpeg\Cowbop Bebop -01.mp4" -ovc libx264 -ovcopts "preset=slow,level=41,crf=18" -oac aac -oacopts  "ab=256k" -start=2:17.200  -length=60 -b:v 15000k -minrate 10000k -maxrate 15000k -bufsize 1835k




When I put this at the end : -b:v 15000k -minrate 10000k -maxrate 15000k -bufsize 1835k , I get the fatal error then it crashes, where do I put this at?

I've tried putting it right after libx264 and right after crf=18 but it didn't work!