Not worked deblocking filters

[Selur]

Deinterlacing is always applied to both sides to keep the preview sync.
Will look into the deblocking filter, nur might simply bei that QTGMC already filtered so much that the additional deblocking does not change anything.
Will look at the debug output once I am home.

As a side note: No clue about amDCT, as long as the Script preview shows a proper script, IT might simply bei that the Filter doesn't change anything that ist noticeable.