Viewing only 1 type of color (or strip off vu in yv12)

[ShinSan]

I've looked everywhere for a filter that does this, but haven't had much luck. Are there any filters out there that could show only one of the y, v, or u, channels of a yv12 image?

[Wilbert]

GreyScale for Y channel and http://www.avisynth.org/mediawiki/wiki/Swap with GreyScale for U and V channels.