By Cretindesaples
### Modify this:
vidfile  = "random_garbage.mkv"
###

c1  = FFVideoSource (vidfile, enable10bithack=false)
c2  = FFVideoSource (vidfile, enable10bithack=true, varprefix="c1_")
w   = c1.Width ()
h   = c1.Height ()
wm4 = (w + 3) / 4 * 4
hm4 = (h + 3) / 4 * 4
b10 = (c2.Height () > c1.Height ())

matrix   = (c1_FFCOLOR_SPACE == 1) ? "709"
\        : (c1_FFCOLOR_SPACE >= 5) ? "601" : Dither_undef ()
par      = (c1_FFSAR_NUM > 0 && c1_FFSAR_DEN > 0)
\        ? Float (c1_FFSAR_NUM) / Float (c1_FFSAR_DEN)
\        : Dither_undef ()
tv_range = (c1_FFCOLOR_RANGE != 2)

(b10) ? c2 : c1
(VersionNumber () >= 2.6) ? last
\ : (b10) ? Dither_addborders16 (0, 0, wm4 - w, hm4 - h)
\         : AddBorders (0, 0, wm4 - w, hm4 - h)
Dither_srgb_display (lsb_in=b10, matrix=matrix, par=par, tv_range=tv_ran