Deblock only after scenechanges?

[Beave]

I'm looking for a way to limit the deblocking I normally use with mpeg2source("input.d2v",cpu=4) in avisynth.
When encoding captured hdtv files many of those tend to have heavy blocks after scenchanges for one or two frames. I don't mind the blockage on fast motion that much, but if I find some easy way to limit the deblocking on very blocky scenes and leave the rest alone I'd be happy use that as well.

I know that I can soften moderate_v and moderate_h parameters, but they still touch the picture in some way and it doesn't deblock those heavy blocks after the scenechange enough.

The scenechange detection doesn't need to be 100% in this case.

[Zarxrax]

Well, the deblocking is based on the quantizer of the frame, so if you have a really blocky frame, it will be deblocked much more heavily than a frame that has no visible blocks. So really, its already doing what you want it to, right?
Does the deblocking really hurt your image that much? I honestly cant tell the difference on scenes that dont have much blocks.