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Old 28th October 2008, 17:57   #1  |  Link
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Join Date: Aug 2008
Posts: 233
Reversible YV12->YUY2->YV12

Hi all --

I know it's probably old-hat to most, but I am a big fan of the GrapeSmoother plugin: It's very fast, minimally destructive and seems to be ideal for already "mostly clean" material, like HDV or AVCHD footage.

Unfortunately, it only works in YUY2. I think I've found a way to convert YV12->YUY2->YV12 without the goofy sort of resampling that takes place with the conventional method, which seems to be especially troublesome for interlaced sources:

function GrapeSmootherYV12(clip c, int "strength") {
	strength=Default(Strength, 0)

	wasYV12 = isYV12(c)

	y  = ConvertToYUY2()
	uv = PointResize(width, height*2)
	u  = uv.UtoY().ConvertToYUY2()
	v  = uv.VtoY().ConvertToYUY2()

	(wasYV12)      ? YToUV(u,v,y).Weave().ConvertToYUY2(interlaced=true) : c
	(strength > 0) ? GrapeSmoother(strength)                             : last
	(wasYV12)      ? ConvertToYV12(interlaced=true)                      : last

Is there a better or faster way to do this? It is a bit slower than simply ConvertToYUY2().GrapeSmoother().ConvertToYV12() ... but the chroma integrity seems much better when done my way.

Or perhaps I'm totally wrong about my enitre approach? Advice would be appreciated

Last edited by vampiredom; 28th October 2008 at 18:01.
vampiredom is offline   Reply With Quote

conversion, grapesmoother, interlaced, yuy2, yv12

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