[MPlayer-users] Getting rid of banding/blocking artifacts in dark areas

[John Stebbins]

Ulrich Lukas wrote:
> Hi,
>
>
> provided I have to make do with less-than-perfect encoded video material
> (MPEG-4 ASP), is there a way to significantly reduce blocking and
> banding artifacts especially in dark areas?
>
> I've tried -vf pp=aq, -vf spp, -vf uspp etc. with various quality
> settings, but the result wasn't really different from unfiltered playback.
>
>   
I've had good results obscuring this kind of artifact by adding a small 
amount of noise with:
-vf noise=2t:2t