Reverse Field Dominance
This filter is intended to reverse the field dominance (I refer the reader to here for the best explanation of field order on the web) of PAL DV video.
My Matrox G400 TV-out outputs the top field of an avi first and then the bottom field.
But PAL DV is always stored as bottom field first and this filter reverses the field order by simply moving each line up (or down) by one line and duplicating the bottom(or top) line.
Check out this thread in Doom9 to see how it came about and to get Donald Graft's VirtualDub version.
Syntax
ReverseFieldDominance(shiftup (true/false, default true))
Version History
Version
1.2 3rd August 2004
Correctly shifts
RGB material in the right direction – thanks to Wilbert for
pointing out the error.
Version
1.1 25th
Feb 2003
Adds the shiftup parameter
Version
1 23rd
Feb 2003
1st attempt - works in RGB and YUY2 colourspaces only.