does anyone know a way how to add subtitles to dvd material and still preserve YUV (YV12).
ie. virtudaldub filters are rgb.
i have tried avisynth script, but am not totally happy with it. what do people think of the script?

LoadPlugin("C:\Programme\AviSynth 2.5\plugins\DGDecode.dll")
LoadPlugin("C:\Programme\AviSynth 2.5\plugins\SmoothDeinterlacer.dll")
LoadPlugin("C:\Programme\AviSynth 2.5\plugins\VSFilter.dll")
video=mpeg2source("C:\My Documents\tempo.d2v")
audio=wavSource("C:\My Documents\tempo T01 2_0ch 448Kbps 48KHz.wav")
audiodub(video,audio)
ConvertToYUY2()
AssumeFieldBased()
SmoothDeinterlace(showlace=false)
TextSub("C:\… .ssa")