> lmin set to 0.01 improved the banding immensely. Adding dc=10 reduced
> pulsating (at the keyframe intervals) in some of the blocks in the
> banded areas.
>
> I suppose that banding is just part of the game with MPEG-2 encoding?
Well, yeah... the banding is primarily because of the 8x8-blocking.
This is done even in H.264/AVC, although the blocks are only 4x4 there
and the deblocking is part of the codec, so you probably won't notice.
With MPEG2 and pre-AVC MPEG4 you need to use a postprocessing filter if
you want deblocking (for example, "-vf-add pp=de" also activates
horizontal and vertical deblocking).
Upcoming wavelet-based codecs shouldn't suffer from such problems,
because they don't need blocking. But they aren't really there yet...
Regards
Alex
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