16-bit Convert YV12 to YV24

[MysteryX]

What's the right way to convert YV12 clip to YV24 using 16-bit-depth?

I'm thinking of this, but is it the right way or will it add distortion?

Dither_convert_8_to_16()
Dither_resize16(Width, Height, csp="YV24")

[MysteryX]

I read that ConvertToYV24 uses Bicubic by default. I just tried this but the output is considerably different than with ConvertToYV24.

Dither_resize16(Width, Height, kernel="Bicubic", csp="YV24")

[MysteryX]

Ah! Got it. This works

Dither_resize16(Width, Height/2, kernel="Bicubic", csp="YV24")

[Motenai Yoda]

you can either use spline36/blackman(minlobe) to reduce chroma blurring, and dither_resize16nr to avoid halo and ringing caused by sharper resize.
or
Dither_resize16nr(Width(),Height()/2,csp="YV24", kernel="bicubic",invks=true)

[MysteryX]

I wasn't totally satisfied with the results I was getting.

invks allows reversing the kernel to get back the original picture? Great!

I might have to experiment with the various kernels and compare the image quality after converting back and forth.

Dither_resize16nr(Width(),Height()/2,csp="YV24", kernel="spline36")
[process in YV24]
Dither_resize16nr(Width(),Height()/2,csp="YV12", kernel="spline36", invks=true)

[Motenai Yoda]

Originally Posted by MysteryX

Dither_resize16nr(Width(),Height()/2,csp="YV24", kernel="spline36")
[process in YV24]
Dither_resize16nr(Width(),Height()/2,csp="YV12", kernel="spline36", invks=true)

inversing kernel don't works well other than with bilinear or bicubic
also it can't reconstruct the exact image, but something lookalike
(debilinear/debicubic do a better job but are for downscaling and rgb/yv12 only)

[MysteryX]

You are right, it looks better without invks. Bicubic appears too soft to me. Spline36 appears closer to what ConvertToYV24/ConvertToYV12 produces, although they say they use Bicubic.

For this script, this is what's giving the best results so far

Dither_convert_8_to_16()
Dither_resize16nr(Width, Height/2, kernel="Spline36", csp="YV24")
KNLMeansCL(D=1, A=2, h=2.1, cmode=true, device_type="GPU", device_id=0, lsb_inout=true)
SuperResXBR(5, 1, 0.15, XbrStr=2.7, XbrSharp=1.3, MatrixIn="601", lsb_in=true, lsb_out=true)
Dither_resize16nr(Width, Height/2, kernel="Spline36", csp="YV12")
DitherPost()