Handbrake describes Deblock as follows on their wiki: "Deblock will smooth away blocking and other artifacts from low quality sources. The further the slider moves to the right, the more intensely it smooths away detail. Deblock is a post-processing
filter from the MPlayer project, called pp7."
Hence I thougtht the encoded mkv would be filtered afterwards by a Media Player when being played but, well doubted it to a certain extent. And according to http://forums.macrumors.com/archive/index.php/t-1026135.html: "Video filters run over a source before
it is encoded, to correct different kinds of problems with their video content." Then the Video Filters are described.
All in all I am confused: What's better and why are there two Deblock(ing)-options...
What's the better one as both seems to do the same?