how can i encoded a RGB 10 bit tif file into a hdr video by ffmpeg?

and one more question: should the input tiff must be 16bit big- or little- endian?

i have try the method here: 1
however i got this : code 1026: YUV color family cannot have RGB matrix coefficients

and i found that:
the procedure information it seems like the ffmpeg automatically set the output format as gbrp16le even when i set the -pix_fmt yuv420p10le.