FFmpeg qp 72

ffmpeg -y -guess_layout_max 0 -thread_queue_size 9999 -indexmem 9999 `
-f dshow -rtbufsize 2147.48M -video_size 3440x1440 -framerate 100 -pixel_format nv12 `
-i video="AVerMedia HD Capture GC573 1":audio="MADI (65+66) (RME HDSPe MADI FX)" `
-map 0 -c:v av1_nvenc -gpu 1 -preset p2 -pix_fmt nv12 -r 100 -rc-lookahead 50 `
-rc:v constqp -qp 72 -b:v 0 -color_range 1 -colorspace 1 -color_primaries 1 `
-color_trc 1 -c:a mp3 -ac 2 -ar 48000 -b:a 320k -max_muxing_queue_size 9999 `
"//192.168.2.4/a-sexy-q-drive/ffmpeg/f_ffmpeg_qp-72_b-0.mp4"