Dark Scene Quality - Harry Potter

It's not an included filter, the download link is found on the Avisynth forum. There's a whole big thread about the filter, and Vlad is planning on releasing a version 1.0 shortly. I usually use Convolution3d(0,8,16,8,16,3,0) for TV captures and DivX->S/VCD conversions, it gets rid of the analog source noise and DivX macroblocks very well. Putting 1 as the first number you'll get a somewhat more aggressive matrix which is supposed to blur a bit more.

I know what is your problem !!! Try to put Image quality priority to 25.

I've the same problem with MATHMAN PROPHECIES and STAR WARS II... But it come up only on my samsung dvd player, watching these movies on my ps2 and pc it plays fine...dark scene are dark I think some players got problem on decompressing the file or such a thing....

For perfect black in TV use the luma 0-256 and for PC use 16-256 To eliminate these blocks reduce luma by filtering with avisynth the portion you want. it is the best way i have seen up to now.

Try Sansgrip's Blockbuster filter with these settings: Blockbuster(method="noise",block_size=3,luma_offset=-1,luma_threshold=28,detail_min=1, detail_max=25)