[HELP] Downscaling/Resizing to ProRes 444: The Journey Begins

[Selur]

Okay, call changed to:

"/Applications/Hybrid.app/Contents/MacOS/ffmpeg" -y -threads 4 -i "/Volumes/CANON/DCIM/102_PANA/P1020699.MP4" -map 0:0 -an -sn -vf  -filter_complex "extractplanes=y+u+v[y][u][v]; [u] scale=w=3840:h=2160:in_range=full:flags=neighbor+bitexact [us]; [v] scale=w=3840:h=2160:in_range=full:flags=neighbor+bitexact [vs];[y][us][vs]mergeplanes=0x001020:yuv444p,format=pix_fmts=yuv444p10le,scale=w=1920:h=1080:flags=bicubic+full_chroma_inp+full_chroma_int" -sws_dither none,scale=out_range=pc -pix_fmt yuv444p10le -strict -1 -vsync 0   -vcodec prores_ks -profile:v 4 -vtag ap4h -f mov "/Users/user/Desktop/P1020699_21_41_13_3910_01.mov"

what happens if you call that call in a Terminal?