thecoalman - 1:21 pm on Oct 11, 2010 (gmt 0)

- Lower Field First

The field selection has to do with interlacing, select the wrong one and you'll get a ghosting effect during a section where there is lot of action. Video encoded using DV material is always lower. I believe anything recording MPEG uses top as do many other devices like capture cards.

Lastly if your source is progressive select frame based.