# Note: rename file to 'foobar.avs' for use

# This avisynth script changes HDV 1080i into SD 480i with better
# quality than a direct conversion in Vegas 6d.
# Script written by John Beale 3/27/2006  www.bealecorner.com

# Script requires Avisynth 2.5 and 'reversefielddominance' plugin from
# http://www.geocities.com/siwalters_uk/reversefielddominance.html


AVISource("C:\Video\HDV.avi")	# frameserved HDV, 1440x1080i RGB24 mode from Vegas
SeparateFields()		# work on fields separately
BilinearResize(720,240)		# convert 1440x540 HDV fields to 720x240 SD fields
Weave()				# rejoin fields to form interlaced 720x480 SD frame
ReverseFieldDominance()		# HDV (upper field 1st) -> SD (lower field 1st)

# -------- optional smoothing & sharpening -------------

				# Blur(Horizontal, Vertical): negative value sharpens
Blur(-0.75,0.25)		# slight blending of fields (vert. blur) looks better
Blur(-.5,0.0)			# yet more sharpening horizontally

# -------- optional noise reduction --------------------

ConvertToYUY2()			# smoothing filters don't use RGB formats
FluxSmoothT(6)			# reduce noise on smooth surfaces for MP2 encode
ConvertToRGB24()		# MP2 encoders prefer RGB formats

# convert result to MPEG2 with CCE Basic with Adv Video Setting->Luminance 16-235