Correct placement of ColorMatrix in AviSynth script?

orion44 · 7th September 2023, 00:41

When converting Blu-Ray to SD resolution, where should I put the ColorMatrix filter?

Before cropping and resizing, or after resizing?

This is my current script:

Code:

DGSource("D:\Project\m2ts.dgi")
ColorMatrix(mode="Rec.709->Rec.601")
Crop(4,0,1916,1080)
BicubicResize(720,404,b=0,c=0.5)
Trim(0,154009)
#SelectRangeEvery(1918,96)

Sharc · 7th September 2023, 16:52

It doesn't matter for the end result. However, I would insert it after resizing because players may default to 709 when you watch the video at the original HD resolution (e.g. for debugging the script) but default to 601 when you watch it at the downscaled SD resolution.

7th September 2023, 00:41	#1 \| Link
orion44 None Join Date: Jul 2007 Location: The Background Posts: 314	Correct placement of ColorMatrix in AviSynth script? When converting Blu-Ray to SD resolution, where should I put the ColorMatrix filter? Before cropping and resizing, or after resizing? This is my current script: Code: DGSource("D:\Project\m2ts.dgi") ColorMatrix(mode="Rec.709->Rec.601") Crop(4,0,1916,1080) BicubicResize(720,404,b=0,c=0.5) Trim(0,154009) #SelectRangeEvery(1918,96)

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7th September 2023, 16:52	#2 \| Link
Sharc Registered User Join Date: May 2006 Posts: 4,021	It doesn't matter for the end result. However, I would insert it after resizing because players may default to 709 when you watch the video at the original HD resolution (e.g. for debugging the script) but default to 601 when you watch it at the downscaled SD resolution.