444 stuff

# added below debilinear444(), right before the end of the file (if not doing any filtering probably right below)

smoothgrad() # can probably skip if the source gradients aren't too banded since you're probably not adding more via filters
dither_convert_yuv_to_rgb(lsb_in=true,matrix="709",output="rgb48y")
r = SelectEvery (3, 0)
g = SelectEvery (3, 1)
b = SelectEvery (3, 2)
Dither_convey_rgb48_on_yv12 (r, g, b)

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encoder cli changes

avs2yuv.exe -raw input.avs - | x264-10bit.exe [your usual settings minus the source avs here] --input-res 1280x720 --input-depth 16 --fps 24000/1001 --input-csp rgb --output-csp i444 --demuxer raw --colormatrix bt709 -

that trailing - means to read from stdin (the pipe) so don't omit it