AJW’s Filters

Channel Balance
- adjust the gain and level of RGB or YCrCb (YUV) channels independently.

Channel Blur
- selectively blur RGB or YCrCb channels independently. If you select YCrCb, and blur Cr and Cb about 2-4 units, it makes a passable-fair chroma smoother for 4:2:0 progressive-scan footage.

Channel Offset
- tweak the positions of RGBA or YCrCbA channels independently. In YCrCb mode, it’s useful for shifting chroma to correct for multiple generations of analog, color-under recording.

Field Balance
- adjust luma and chroma gains on Fields 1 and 2 of an interlaced image independently. Very useful for correcting field imbalances caused by mismatched head amps in dual-head, helical-scan analog VTRs.

H. Chroma Blur
- an alternative to FCP’s own 4:1:1 and 4:2:2 chroma smoothers (and predating them, grin), this lets you adjust the horizontal blurring and offsetting of the chroma signal to correct for color-subsampled recording formats like DV. Sometimes Apple's filters work better. Sometimes mine do.

Pixel Mask
- Hide a dead or hot pixel (and its surrounding compression artifacts, if necessary) with a mask made from adjacent pixels. Read this article for details on Pixel Mask, and on how to write your own FXScript filters.

Y/C Delay - this is a streamlined version of Channel Offset: it just repositions chroma with respect to luma so that colors that have shifted from too many generations of color-under recording can get put back where they belong. It can also be useful in repositioning subsampled chroma for cutting a key with; sometimes a slight leftwards (negative number) offset makes for a better-aligned matte.