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Wilbert · 30th October 2004, 16:53

I put up a new version. In the previous ones, the used coefficients were slightly wrong. Although the difference is not noticable in practice

btw, I corrected the naming convention. MPEG-2 coefficients are called Rec.709 and MPEG-1 coefficients Rec.601. Thus

ColorMatrix(clip, mode="Rec.709->Rec.601") (default)
ColorMatrix(clip, mode="Rec.601->Rec.709")

I advice you to use the internal

ConvertToRGB(clip, matrix="Rec.709")

instead of

ColorMatrix(clip, rgb=true).

Output is identical (thx IanB), but the former is faster.

30th October 2004, 16:53	#28 \| Link
Wilbert Moderator Join Date: Nov 2001 Location: Netherlands Posts: 6,364	I put up a new version. In the previous ones, the used coefficients were slightly wrong. Although the difference is not noticable in practice btw, I corrected the naming convention. MPEG-2 coefficients are called Rec.709 and MPEG-1 coefficients Rec.601. Thus ColorMatrix(clip, mode="Rec.709->Rec.601") (default) ColorMatrix(clip, mode="Rec.601->Rec.709") I advice you to use the internal ConvertToRGB(clip, matrix="Rec.709") instead of ColorMatrix(clip, rgb=true). Output is identical (thx IanB), but the former is faster. Last edited by Wilbert; 30th October 2004 at 16:56.