Originally Posted by videoFred So yes, the compression from my mpeg4 example clip is removing some detail from the original indeed. If there is a noise pixel on one capture but not the other, then the average of the two will be a pixel that is halfway between the color and brightness of the noise pixel and the color and brightness of the good pixel. However, it also produces noise reduction that, unlike the various digital noise reduction techniques, has no motion artifacts.

VapourSynth script reader for AviSynth2. Must be uncompressed! Local Deflicker.

UnBlock is a filter that removes the "blockiness" of heavily or moderately compressed images with statistical approach. A small spatial derainbow function. This is a set of functions related to masks, so localized filtering will be able, giving you finer control on how and where to filter or protect certain zones.